--1--

E96Y06A8Z

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

Absolute Maximum Ratings

· Supply voltage

7.0

· Operating temperature

Topr

20 to +75

°C

· Storage temperature

Tstg

65 to +150

°C

· Allowable power dissipation

417

Operating Condition

Supply voltage

1.1 to 4.0

Description

The CXA3179N is a low current consumption FM

IF amplifier which employs the newest bipolar

process. It is suitable for M-ary FSK pagers using

AFC.

Features

· Low current consumption : 1.1 mA

(typ. at V

=1.4 V)

· Low voltage operation : V

=1.1 to 4.0 V

· Small package 24-pin SSOP

· Second mixer and oscillator

· Needless of IF decoupling capacitor

· Reference power supply for operational amplifier

and comparator

· Bit rate filter with variable cut-off

· AFC current output circuit

· RSSI function

· IF input, V

standard

· Maximum input frequency : 30 MHz

Applications

· M-ary FSK pagers

· Double conversion pagers

Structure

Bipolar silicon monolithic IC

Block Diagram and Pin Configuration

IF Amplifier for M-ary FSK Pagers (AFC Supported)

24 pin SSOP (Plastic)

CXA3179N

OSC

MIX

REG

LVA

IF_LIM

AFC

QUAD_DET

RSSI

FILTER

GND

LEVEL
COMP

OSC IN

OSC OUT

MIX OUT

IF IN

AFC

QUAD

FIL SW

TH CONT

MIX IN

GND

REG OUT

REG CONT

LVA OUT

B.S.

AUDIO

RSSI

NRZ OUT

AFC C.

AFC OFF

L.C. OUT

--2--

CXA3179N

Pin Description

Symbol

Equivalent circuit

Description

No.

voltage

OSC IN

OSC OUT

MIX OUT

IF IN

TH CONT

AFC

QUAD

1.4 V

0.7 V

1.3 V

1.4 V

Connects the external parts of crystal

oscillator circuit.

A capacitor and crystal oscillator are

connected to these pins and V

Mixer output.

Connect a 455 kHz ceramic filter

between this pin and IF IN.

Power supply.

IF limiter amplifier input.

Determines the level comparator

threshold value.

Threshold value can be adjusted by

inserting the resistor between Pin 6 and

Normally, short to V

AFC current output.

Connects the phase shifter of FM

detector circuit.

300

15k

GND

15k

GND

1.5k

GND

1.5k

20k

GND

25k

GND

22k

GND

20p

20k

--3--

CXA3179N

Symbol

Equivalent circuit

Description

No.

voltage

FIL SW

RSSI

AFC OFF

L.C. OUT

NRZ OUT

LVA OUT

AUDIO

0.2 V

0.1 V

0.2 V

Connects the capacitor that determines

the LPF cut-off.

Switches the LPF cut-off.

Cut-off is decreased by setting this pin

high.

(Applied voltage range :

0.5 V to +7.0 V)

RSSI circuit output.

Sets off the AFC circuit current.

The AFC current is off by setting Pin 18

low and Pin 14 high.

Level comparator, NRZ comparator

and LVA comparator outputs. They are

open collectors.

(Applied voltage range :

0.5 V to +7.0 V)

Level comparator and NRZ comparator

inputs.

The filter circuit output is connected.

20k

140k

GND

70k

20k

100k

GND

35k

50k

GND

--4--

CXA3179N

Symbol

Equivalent circuit

Description

No.

voltage

B.S.

AFC C.

REG

CONT

REG OUT

GND

MIX IN

1.0 V

1.4 V

Controls the battery saving.

Setting this pin low suspends the

operation of IC.

(Applied voltage range :

0.5 V to +7.0 V)

Controls the time constant of the AFC

circuit. Set this pin high to make the

short time constant.

(Applied voltage range :

0.5 V to +7.0 V)

Output for internal constant-voltage

source amplifier.

Connect the base of PNP transistor.

(Current capacity : 100 µA)

Constant-voltage source output.

Controlled to maintain 1.0 V.

Ground

Mixer input.

20k

100k

GND

20k

140k

GND

78k

22k

GND

4.16k 4.16k

--5--

CXA3179N

Item

Current consumption

AM rejection ratio

NRZ output saturation voltage

NRZ output leak current

NRZ hysteresis width

VB output current

VB output saturation voltage

REG OUT voltage

LVA operating voltage

LVA output leak current

LVA output saturation voltage

Detector output voltage

Logic input voltage high level

Logic input voltage low level

Limiting sensitivity

Detector output level ratio

deviation to level comparator

window width

Level comparator

output saturation voltage

Level comparator

output leak current

RSSI output offset

Mixer input resistance

Mixer output resistance

IF limiter input resistance

Electrical Characteristics

=1.4 V, Ta=25 °C, F

=21.7 MHz, F

MOD

=1.6 kHz, F

DEV

=4.8 kHz, AM

MOD

=30 %)

Symbol

CCS

AMRR

SATNRZ

LNRZ

TWNRZ

OUT

SATVB

REG

LVA

LLVA

SATLVA

ODET

THBSV

TLBSV

IN (LIM)

LCWR

SATLC

LLC

ORSSI

INLIM

OUTMIX

INLIM

Conditions

Measurement circuit 1, V2=1.0 V

Measurement circuit 1, V2=0 V

Measurement circuit 2, 30 k LPF

Measurement circuit 4, Vin=0.3 V

Measurement circuit 3, Vin=0.1 V

Measurement circuit 3,

Vin=0.1 to 0.3 V

Measurement circuit 5

Output current 0 µA

Measurement circuit 6,

V1=1.4 to 1.0 V

Measurement circuit 6, V1=1.0 V

Measurement circuit 7

Measurement circuit 2

Measurement circuit 2,

Data filter fc=2.4 kHz

When Pin 6 is shorted to V

Measurement circuit 9

Measurement circuit 8

Measurement circuit 10

Typ.

1.1

1.00

1.05

108

150

2.0

1.5

Max.

1.35

0.4

5.0

0.4

1.05

1.10

2.0

0.4

0.35

+15

0.4

2.0

300

2.4

1.8

Unit

µA

mVrms

dBm

µA

Min.

0.7

100

0.95

1.00

0.9

1.6

1.2

--6--

CXA3179N

Electrical Characteristics Measurement Circuit

Measurement circuit 2

Measurement circuit 4

Measurement circuit 6

Measurement circuit 1

Measurement circuit 3

Measurement circuit 5

V1
1.4V

V2
1V

100k

Vin

V1
1.4V

V2
1V

GND

0.5V

GND

100µA

22p

15p

1µ

8.2k 1

1200p

V1
1.4V

1000p

10p to
120p

Vin

1.8µ

V2
1V

V1
1.4V

V2
1V

50µA

Vin

V2
1V

100k

V1
1.4 to 1.0V

--7--

CXA3179N

Measurement circuit 8

Measurement circuit 10

Measurement circuit 7

Measurement circuit 9

V1
1.4V

V2
1V

50µA

V1
1.4V

V2
1V

50µA

Vin
0.1V

V1
1.4V

V2
1V

100k

Vin
0.2V

V2
1V

V1
1.4V

100P

--8--

CXA3179N

Application Circuit

I
X

I
F

I
M

I
L

t
o

1.8

µH

I
O

DIS

1µ

FIL

0.0

1µ

I
L

DIO

6.8

0.0

1µ

P+

Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility fo

any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same

--9--

CXA3179N

Application Notes

1) Power Supply

The CXA3179N, with built-in regulator, is designed to permit stable operation at a wide range of supply

voltage from 1.1 to 4.0 V. Decouple the wiring to V

(Pin 4) as close to the pin as possible.

2) Oscillator Input

Oscillator input method

a) Using Pins 1 and 2, input a self-excited oscillation signal through the composition of a Colpitts type

crystal oscillator circuit.

b) Directly input a local oscillation signal to Pin 1.

3) Mixer

The mixer is of double-balance type. Pin 24 is the input pin. Input though a suitable matching circuit. The

input impedance is 2.0 k

Pin 3 serves as the output pin for the mixer, and a load resistance of 1.5 k

is incorporated.

4) IF Filter

The filter to be connected between this mixer output and the IF limiter amplifier input should have the

following specifications.

I/O impedance

: 1.5 k

±10 %

Band width

: Changes according to applications.

5) IF Limiter Amplifier

The gain of this IF limiter amplifier is approximately 100 dB. Take notice of the following points in making

connection to the IF limiter amplifier input pin (Pin 5).

a) Wiring to the IF limiter amplifier input (Pin 5) should be as short as possible.

b) As the IF limiter amplifier output appears at QUAD (Pin 8), wiring to the ceramic discriminator

connected to QUAD should be as short as possible to reduce the interference with the mixer output and

IF limiter amplifier input.

Ceramic
filter

From
local signal

Ceramic
filter

Fig. 1

Wire as short and apart as possible

As short as possible

Fig. 2

--10--

CXA3179N

6) Quick Charge

In order to hasten the Pin 7 rising time from when power is turned on, the CXA3179N features a quick

charge circuit. The capacitance value connected to Pin 7 should be chosen such that the voltage does not

vary much due to discharge during battery saving.

Connect a signal for controlling the quick charge circuit to Pin 18. Setting this pin high enables the quick

charge mode, and setting this pin low enables the steady-state reception mode. Quick charge is used

when the power supply is turned on. The battery saving must be set high at the time.

Connect Pin 18 to GND when quick charge is not being used.

Fig. 3

Example when the Pin 7 REF capacitance value is 1 µF

T1 in Fig. 3

: 2-level data setting time after quick charge

0 ms

T2 in Fig. 3

: 4-level data setting time after quick charge

2 ms or less

T3 in Fig. 3

: 4-level data can be obtained

T4 in Fig. 3

: 2-level data can be obtained

5ms

1ms

Power supply to the IC

(Pin 4)

Quick charge

(Pin 18)

Battery saving control

(Pin 17)

--11--

CXA3179N

7) Detector

The detector is of quadrature type. To perform phase shift, connect a ceramic discriminator to Pin 8.

The phase shifting capacitor for the quadrature detector is incorporated. The FM (FSK) signal

demodulated with the detector will be output to AUDIO (Pin 16) through the internal LPF.

The AUDIO output is the anti-phase output to the NRZ OUT.

The CDBM455C50 (MURATA MFG. CO., LTD.) ceramic discriminator is recommended for the CXA3179N.

For the 2-level system, the CDBM455C28 can also be used.

Fig. 4

The detector output level is changed according to the resistance value connected to Pin 8.

8) Filter Buffer, Level Comparator and NRZ Comparator

The LPF circuit is built in this IC.

The LPF output is connected internally to the NRZ comparator, level comparator and quick charge circuit.

Fig. 5

Using the LPF, remove the noise from the demodulated signal and input the signal to the above three

circuits.

6.5k

Ceramic
discriminator
CDBM455C50

L.C.

0.2V

LPF

DET

--12--

CXA3179N

8) -1. LPF Constant

The composition of the data filter is ternary.

The first-stage cut-off f

The second-stage cut-off f

Q =

, C

External capacitance shown in the Application Circuit

IC internal resistance

The Butterworse characteristic is for C

R is approximately 55 k

±20 % when Pin 12 is low. The table below shows the example of constants to

data rate.

8) -2. Comparator Output

The level comparator and the NRZ comparator shape the waveform of this input signal and output it as a

square wave. The comparator output stage is for open collector.

Thus, if the CPU is of CMOS type and the supply voltage is different, a direct interface as illustrated in the

figure below can be implemented.

Fig. 6

Capacitance (pF)

6800

1500

PIN9 1100 P

PIN10 680 P

PIN11 1420 P

PIN9 1100 P

PIN10 680 P

PIN11 1420

fc (Hz)

430

950

1900

1000

2000

1000

2000

Data rate

512 bps (2 levels)

1200 bps (2 levels)

2400 bps (2 levels)

1600 bps (2 levels)

3200 bps (2 levels)

3200 bps (4 levels)

6400 bps (4 levels)

Pin 12 filter switch

(15)

1.4V

CMOS IC

CMOS power supply

Comparator output

--13--

CXA3179N

8) -3. Level Comparator Output

The level comparator characteristics are as shown in the figure below. Therefore, a high signal is output at

the bit border even if the input signal is a ±4.8 kHz signal. This high output interval varies according to the

frequency response of the bit rate filter, and widens as the cut-off frequency becomes lower. The decoder

avoids this high interval when processing data.

9) REG CONT

Controls the base bias of the external transistors.

10) LVA OUT

This pin goes high (open) when the supply voltage becomes lower. Since the output is an open collector, it

can be used to directly drive the CMOS device. The setting voltage of the LVA is 1.05 V (typ.), and it

possesses a hysteresis with respect to the supply voltage. The hysteresis width is 50 mV (typ.).

11) B.S.

Operation of the CXA3179N can be halted by setting this pin low. This pin can be connected directly to the

CMOS device. The current consumption for battery saving is 10 µA or less (at 1.4 V).

Fig. 7

4.8

1.6

+1.6

+4.8

Input signal

Output

Input frequency deviation [kHz]

Level comparator output

B.S.

--14--

CXA3179N

12) M-ary (M=2- or 4-level) FSK Demodulation System

12)-1. Output Waveform

Polarity discrimination output and level comparator output are used to demodulate the 4-level waveform

shown below.

[4-level FSK demodulating waveform]

[NRZ OUT] Polarity discrimination output

(When the input frequency is higher than the local frequency)

[L.C. OUT] Level comparator output

The 4-level FSK demodulating data is divided into an NRZ OUT and L.C. OUT shown above. Here, the

NRZ OUT corresponds to a conventional NRZ comparator output. The L.C. OUT is made comparing the

demodulated waveform amplitude to the IC internal reference voltage levels. When the threshold value of

L.C. OUT is not appropriate to the detector output, the resistance value on Pin 8 should be varied for the

detector output level adjustment or the resistor should be inserted between Pin 6 and V

for the level

comparator threshold value adjustment.

For the 2-level FSK demodulation, it corresponds to a conventional NRZ comparator output.

+4.8kHz

+1.6kHz

1.6kHz

4.8kHz

POS

NEG

1.6kHz

4.8kHz

The polarity can be inverted

by setting the local frequency

higher than the input

frequency.

--15--

CXA3179N

12)-2. 4-level Signal and Threshold Value

The demodulated signal is optimally matched to the NRZ comparator threshold value by applying AFC

(see 13) AFC). (operation point correction using a feedback loop filter)

The comparator threshold value is fixed.

The level comparator threshold value can be adjusted by varying the detector output level by changing the

damping resistance of the discriminator. (AC gain adjustment)

AC gain adjustment

12)-3. Offset Amount and Threshold Value

Immediately after power-on when the REF capacitor is not charged with the correction voltage, if the input

frequency has an offset, some time is required to correct this offset. In addition, the times required to

obtain 2-level and 4-level data differ according to the offset amount.

a) 2-level signals

In the case of 2-level signals, correct data is obtained when the offset amount is smaller than the detector

output amplitude. This is 75 mV or less when the detector output level is 150 mVp-p which corresponds to

within ±4.8 kHz when converted to a frequency by the S curve. Thus, 2-level data is obtained without an

operation point correction time lag when the frequency offset is within ±4.8 kHz.

b) 4-level signals

In the case of 4-level signals, correct data is obtained when the offset amount is less than 1/3 of the

detector output amplitude (during ±4.8 kHz DEV). This is 25 mV or less when the detector output level is

150 mVp-p which corresponds to ±1.6 kHz or less when converted to a frequency by the S curve. Thus, 4-

level data is obtained without an operation point correction time lag when the frequency offset is within

±1.6 kHz

As shown above, 4-level signals have an allowable offset range 1/3 that of 2-level signals. When the offset

exceeds this allowable range, time is required to determine the operation point and obtain correct data

through feedback. Also, even if the offset is within the allowable range, the output pulse duty changes until

the offset is 0.

Level comparator threshold value 1

NRZ threshold value=Demodulated signal average voltage

Level comparator threshold value 2

NRZ threshold
value offset

Level comparator threshold value 1

NRZ threshold
value offset

Level comparator threshold value 2

--16--

CXA3179N

13) AFC

The AFC is of the current output type which outputs the frequency deviation in the form of the current and

converts it to the voltage. The output current range is approximately ±0.4 µA for the slow mode and ±70

µA for the fast mode. The circuit to be connected with this pin should have the higher impedance.

The operating range of the AFC pin is between approximately 0.1 V to (V

0.2) V. Use the buffer

amplifier to expand the operating range.

The Pin 7 voltage V continues to change till the Vin value reaches the Vref value. When these values are

equal, the Pin 7 output current becomes "0" and the voltage is determined by the charge and time.

Therefore, the Pin 7 voltage is undefined.

The AFC voltage varies, for example, as shown below by the VCO characteristics. The AFC voltage

follows the VCO characteristics because this voltage is independent of the slope of the S curve. In other

words, the CXA3179N operates according to the VCO characteristics when the VCO characteristics have

the linearity with respect to the voltage and the VCO characteristics can be controlled within the range

shown in the graph below.

Vref

V=it/C

LPF

Vref

BUF

COMP

AUDIO

1st MIX

1st OSC

VCO

To CXA3179N

External parts

Vin (S curve voltage)

0.2)V

0.1V

i
n

l
t
a

Input frequency

--17--

CXA3179N

14) Sensitivity Adjustment Method

The constants shown in the Application Circuit are for the standard external parts. However, adjustment

may be necessary depending on the conditions of use, characteristics of external parts, and the RF system

circuit and decoder connected to the IF IC, etc. Adjust the sensitivity according to the following

procedures.

a) MIX IN matching

When using a matching circuit between the RF system circuit and MIX IN of the CXA3179N, adjust the

trimmer to obtain the optimal sensitivity while monitoring the AUDIO output.

b) Local input level

The mixer circuit gain is dependent on the local signal input level to OSC IN. The input level to OSC IN

should be set as high as possible within the range of 6 to +2 dBm as shown in the graph of "Local input

level vs. Mixer gain characteristics". However, care should be taken as raising the input level above +2

dBm will cause the sensitivity to drop.

When creating the local signal using the internal oscillator circuit, the oscillation level varies according to

the external capacitances attached to Pins 1 and 2 and the characteristics of the used crystal. Therefore,

be sure to adjust the external capacitance values attached to Pins 1 and 2 according to the crystal

characteristics.

and C

have the following range in the figure above.

= C

to C

=5C

As for the ratio of C

to C

, the oscillation stabilizes as C

approaches equality with C

The oscillation level decreases as the C

and C

values become larger, and increases as the C

and C

values become smaller.

Use a FET probe to confirm the local input level.

c) LPF constant

The data filter cut-off may need to be changed depending on the characteristics of the connected decoder.

Adjust the capacitance values of Pins 9 to 12 while checking the incoming sensitivity including the decoder.

If the capacitance values are too large, the detector output waveform will deviate at high data rates,

causing the sensitivity to drop. Conversely, if the capacitance values are too small, the LPF will be easily

affected by noise, causing the sensitivity to drop.

Adjust capacitance values of Pins 9 to 12 so that the capacitance value described in "8)-1. LPF Constant"

becomes smaller.

OSC

--18--

CXA3179N

d) Detector output level

The NRZ comparator and level comparator threshold values are fixed for the CXA3179N. In the case of 4-

level signals, the relationship between the level comparator threshold value and the detector output level

affects the sensitivity. The detector output level can be adjusted by the resistance attached to Pin 8.

Increasing the resistance value also increases the output level, and vice versa.

The Pin 8 resistance value differs according to the ceramic discriminator attached to Pin 8. When the

discriminator is changed to a different type, the resistance value must be adjusted.

Adjust the resistance value while monitoring the level comparator output waveform or the sensitivity

including the decoder.

e) AFC

The CXA3179N uses AFC to correct the IF frequency deviation. When the IF frequency deviation amount

is large, correction takes time and may lower the sensitivity. Adjust the oscillator frequency of the local

oscillator so that the center frequency of the signal input to Pin 5 (IF IN) is as close to 455 kHz as possible.

15) CXA3179N Standard Board Description

· Outline

This board contains the external parts shown in the Application Circuit in order to evaluate the

CXA3179N operation

· Features

The following CXA3179N basic operations can be checked.

1) Varying the data filter cut-off

2) Battery saving and other mode switching

3) NRZ output and level comparator output pins

4) AFC pin -- Pin 7 serves as the output pin for the AFC.

· Method of use

1) Input the CXA3179N supply voltage V

=1.4.

This IC operates with a single power supply.

2) The CXA3179N uses a 21.245 MHz crystal. Input the RF signal from the RF pin and use this IC in

the condition where IF=455 kHz.

3) The AFC pin voltage is undefined with the IC itself because the current output circuit is employed for

the AFC. For the evaluation, be sure to apply the bias to the AFC pin externally or to make the AFC

loop.

4) Set the mode switches.

· Mode switch setting

Mode switches S1, S2, S3 and S4 are provided in four locations in the board. Each basic operation can

be confirmed by switching these mode switches while referring to the board layout. See the table in "15)

Control Pins" for the mode switching.

· Device specification

See these specifications for the IC specifications. The ICs for this evaluation board are ES specification.

· Circuit diagram

The circuit diagram is the same as the Application Circuit in these Specifications.

--20--

CXA3179N

15) -3. List of Standard Board Parts

Resistor

Capacitor

Inductor

Active Component

Crystal

Value

Part #

Remarks

(Manufacture)

Note

220

8.7 k

100 k

(RIVER)

E12 series

1/8W

1.8 µH

EL0405

(TDK Products)

E12 series

2.5 mm pitch

(Lead Pitch)

PNP

2SA1015

(TOSHIBA CORPORATION)

21.245 MHz

XTAL

NR-18BN

(NIHON DEMPA KOGYO CO., LTD.)

6.8 P to 45 P

15 P

22 P

100 P

1000 P

1100 P

680 P

1420 P

0.01 µ

1 µ

10 µ

C14

C11

C12

C13

C10

TZ03P450FR169

(MURATA PRODUCTS)

DD100 series

temperature characteristics

type B

(MURATA PRODUCTS)

25 V 1 µ

(SHIN-EI TUSHIN KOGYO CO., LTD.)

25 V 10 µ

(SHIN-EI TUSHIN KOGYO CO., LTD.)

TRIMMER CAPACITOR

CERAMIC CAPACITOR

E12 series

(high dielectric constant type)

ELECTROLYTIC CAPACITOR

E6 series

--22--

CXA3179N

Mixer input audio response and RSSI characteristics

i
o

r
e

[
d

]

I

[
m

]

S/N

S + N + D

RF 21.7MHz
LOCAL 21.245MHz 6dBm
Audio 1.6kHz CW
Dev. 4.8kHz
0dB = 63.1mVrms
V

= 1.4V

T = 25°C

RSSI

120

110

100

1000

800

600

400

200

1.4

1.3

1.2

1.1

1.0

0.9

1.0

2.0

3.0

4.0

+ f

Mixer input level [dBm]

Current consumption characteristics

Supply voltage [V]

r
r
e

t

c

t
i
o

[
m

]

t
p

t

l
e

l

[
d

]

Mixer I/O characteristics and 3rd intercept point

Mixer input level [dBm]

The I/O level is for the values read at
I/O pin with the spectrum analyzer

=21.7MHz

=21.245MHz 6dBm

=21.725MHz

=21.750MHz

Example of Representative Characteristics

--23--

CXA3179N

0.01µ

21.7MHz 60dBm

21.245MHz

100

200

500

10k

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

150

200

250

300

Local input level vs. Mixer gain characteristics

i
x

r

g

i
n

[
d

]

Local input level [dBm]

Variable cut-off characteristics of audio filter

[
d

]

Input frequency [Hz]

Pin 12 voltage

Level comparator characteristics

r
a

t
o

r

o

t
p

t

v

l
t
a

[
m

]

Comparator input voltage [mV]

--24--

CXA3179N

300

250

210
200

150

100

0.5

1.0

1.5

2.0

2.5

3.0

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

160

180

200

220

240

260

1.2

1.0

0.8

0.6

0.4

0.2

1.00

1.05

1.10

1.15

Level comparator threshold value control characteristics

(Output low

high switching level)

l

c

r
a

t
o

r

t
h

r
e

l
d

l
u

[
m

]

Pin 6 current [µA]

Typical value when Pin 6 is shorted to V

Representative example
using typical sample

NRZ comparator characteristics

r
a

t
o

r

o

t
p

t

v

l
t
a

[
V

]

Comparator input voltage [mV]

LVA characteristics

r
a

t
o

r

o

t
p

t

v

l
t
a

[
V

]

Supply voltage [V]

--25--

CXA3179N

20°C

0°C

25°C
50°C
75°C

:
:
:
:
:

: H L
: L H

800

700

600

500

400

300

200

100

120

110

100

RSSI output voltage temperature characteristics

I

o

t
p

t

v

l
t
a

r
a

t
e

r
i
s

t
i
c

[
m

]

RF input level [dBm]

Detector output level and level comparator

threshold value temperature characteristics

t
e

t
o

r

o

t
p

t

l
e

l

a

l
e

l

c

r
a

t
o

r

t
h

r
e

l
d

l
u

[
m

]

Temperature [°C]

4.8kHz Dev. detector output level

Level comparator threshold
value for positive side

1.6kHz Dev. detector output level

Level comparator threshold value for negative side

SONY CODE

EIAJ CODE

JEDEC CODE

SSOP-24P-L01

SSOP024-P-0056

PACKAGE MATERIAL

LEAD TREATMENT

LEAD MATERIAL

PACKAGE MASS

EPOXY RESIN

SOLDER/PALLADIUM

42/COPPER ALLOY

PACKAGE STRUCTURE

PLATING

0.1g

24PIN SSOP(PLASTIC)

0.1 ± 0.1

0° to 10°

.
5

.
2

DETAIL A

.
6

.
1

7.8 ± 0.1

0.65

.
6

.
2

0.1

1.25 0.1

+ 0.2

0.13 M

NOTE: Dimension "

" does not include mold protrusion.

b=0.22 0.05

+ 0.1

.
1

.
0

(0.22)

(
0

.
1

)

.
1

.
0

DETAIL B : SOLDER

DETAIL B : PALLADIUM

.
0

b=0.22 ± 0.03

Package Outline Unit : mm

CXA3179N

--27--

NOTE : PALLADIUM PLATING

This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame).

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: CXA3179N

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: CXA3179N