1
FN2886.8
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2003, 2004. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
HC-5504B
EIA/ITU PABX SLIC with 40mA Loop Feed
The Intersil SLIC incorporates many of the BORSHT functions
on a single IC chip. This includes DC battery feed, a ring relay
driver, supervisory and hybrid functions. This device is
designed to maintain transmission performance in the
presence of externally induced longitudinal currents. Using
the unique Intersil dielectric isolation process, the SLIC can
operate directly with a wide range of station battery voltages.
The SLIC also provides selective denial of power. If the PBX
system becomes overloaded during an emergency, the SLIC
will provide system protection by denying power to selected
subscriber loops.
The Intersil SLIC is ideally suited for the design of new digital
PBX systems by eliminating bulky hybrid transformers.
Pinout
HC-5504B (SOIC)
TOP VIEW
Features
Pin for Pin Replacement for the HC-5504
Capable of 5V or 12V (V
B
+) Operation
Monolithic Integrated Device
DI High Voltage Process
Compatible With Worldwide PBX Performance
Requirements
Controlled Supply of Battery Feed Current for Short Loops
(41mA)
Internal Ring Relay Driver
Allows Interfacing With Negative Superimposed Ringing
Systems
Low Power Consumption During Standby
Switch Hook Ground Key and Ring Trip Detection
Functions
Selective Denial of Power to Subscriber Loops
Pb-free Available
Applications
Solid State Line Interface Circuit for Analog and Digital
PBX Systems
Direct Inward Dial (DID) Trunks
Voice Messaging PBXs
Related Literature
- AN549, The HC-5502S/4X Telephone Subscriber Line
Interface Circuits (SLIC)
- AN571, Using Ring Sync with HC-5502A and HC-5504
SLICs
Ordering Information
PART NUMBER
TEMP.
RANGE (C)
PACKAGE
PKG.
DWG. #
HC9P5504B-5
0 to 75
24 Ld SOIC
M24.3
HC9P5504B-5Z (Note)
0 to 75
24 Ld SOIC (Pb-free) M24.3
HC9P5504B-5ZX96
(Note)
0 to 75
24 Ld SOIC (Pb-free)
Tape and Reel
M24.3
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is compatible with both SnPb and
Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J Std-020B.
1
2
3
4
5
6
7
8
9
10
11
12
16
17
18
19
20
21
22
23
24
15
14
13
TIP
RING
C
3
DG
RS
TF
RF
BG
TX
C
4
+IN
C
2
AG
OUT
V
B
+
R
X
-IN
RC
PD
GKD
SHD
RD
RFS
V
B
-
Data Sheet
July 2004
2
Absolute Maximum Ratings
(Note 1)
Thermal Information
Maximum Continuous Supply Voltages
(V
B
-) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -60V to 0.5V
(V
B
+) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 15V
(V
B
+ - V
B
-) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75V
Relay Drive Voltage (V
RD
). . . . . . . . . . . . . . . . . . . . . . . -0.5V to 15V
Operating Conditions
Operating Temperature Range
HC-5504B-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 75C
Relay Driver Voltage (V
RD
) . . . . . . . . . . . . . . . . . . . . . . . . . 5 to 12V
Positive Supply Voltage (V
B
+) . . . . . . . 4.75 to 5.25 or 10.8 to 13.2V
Negative Supply Voltage (V
B
-) . . . . . . . . . . . . . . . . . . . . -42 to -58V
High Level Logic Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . 2.4V
Low Level Logic Input Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . 0.6V
Loop Resistance (R
L
) . . . . . . . . . . . . . . . . . . . . . . . . . 200 to 1200
Thermal Resistance (Typical, Note 2)
JA
(C/W)
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
75
Maximum Junction Temperature (Plastic Packages) . . . . . . . 150C
Maximum Storage Temperature Range . . . . . . . . . . -65C to 150C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300C
(SOIC - Lead Tips Only)
Die Characteristics
Transistor Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Diode Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Die Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 x 102
Substrate Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Connected
Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bipolar-DI
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. Absolute maximum ratings are limiting values, applied individually, beyond which the serviceability of the circuit may be impaired.
Functional operability under any of these conditions is not necessarily implied.
2.
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
Unless Otherwise Specified, V
B
- = -48V, V
B
+ = 12V and 5V, AG = BG = DG = 0V, Typical Parameters
T
A
= 25C. Min-Max Parameters are Over Operating Temperature Range
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
On Hook Power Dissipation
I
LONG
= 0 (Note 3), V
B
+ = 12V
-
170
235
mW
Off Hook Power Dissipation
R
L
= 600
, I
LONG
= 0 (Note 3), V
B
+ = 12V
-
425
550
mW
Off Hook I
B
+
R
L
= 600
, I
LONG
= 0 (Note 3), T
A
= -40C
-
-
6.0
mA
Off Hook I
B
+
R
L
= 600
, I
LONG
= 0 (Note 3), T
A
= 25C
-
-
5.3
mA
Off Hook I
B
-
R
L
= 600
, I
LONG
= 0 (Note 3)
-
35
41
mA
Off Hook Loop Current
R
L
= 1200
, I
LONG
= 0 (Note 3)
-
21
-
mA
Off Hook Loop Current
R
L
= 1200
, V
B
- = -42V, I
LONG
= 0 (Note 3)
T
A
= 25C
17.5
-
-
mA
Off Hook Loop Current
R
L
= 200
, I
LONG
= 0 (Note 3)
36
41
48
mA
Fault Currents
TIP to Ground
-
14
-
mA
RING to Ground
-
55
-
mA
TIP to RING
-
41
-
mA
TIP and RING to Ground
-
55
-
mA
Ring Relay Drive V
OL
I
OL
= 62mA
-
0.2
0.5
V
Ring Relay Driver Off Leakage
V
RD
= 12V, RC = 1 = HIGH, T
A
= 25C
-
-
100
A
Ring Trip Detection Period
R
L
= 600
-
2
3
Ring
Cycles
Switch Hook Detection Threshold
SHD = V
OL
10
-
-
mA
SHD = V
OH
-
-
5
mA
Ground Key Detection Threshold
GKD = V
OL
20
-
-
mA
GKD = V
OH
-
-
10
mA
HC-5504B
3
Loop Current During Power Denial
R
L
= 200
-
2
-
mA
Dial Pulse Distortion
0
-
5
ms
Receive Input Impedance
(Note 3)
-
110
-
k
Transmit Output Impedance
(Note 3)
-
10
20
2-Wire Return Loss
Referenced to 600
+ 2.16
F (Note 3)
SR
L
LO
-
15.5
-
dB
ER
L
-
24
-
dB
SR
L
HI
-
31
-
dB
Longitudinal Balance
1V
RMS
200Hz - 3400Hz (Note 3) IEEE Method
0C
T
A
75C
2-Wire Off Hook
58
65
-
dB
2-Wire On Hook
60
63
-
dB
4-Wire Off Hook
50
58
-
dB
Low Frequency Longitudinal Balance
R.E.A. Method (Note 3), R
L
= 600
0C
T
A
75C
-
-
23
dBrnC
-
-
-67
dBm0p
Insertion Loss
at 1kHz, 0dBm Input Level, Referenced 600
2-Wire to 4-Wire, 4 Wire to 2-Wire
-
0.05
0.2
dB
Frequency Response
200Hz - 3400Hz Referenced to Absolute Loss at
1kHz and 0dBm Signal Level (Note 3)
-
0.02
0.05
dB
Idle Channel Noise
(Note 3)
2-Wire to 4-Wire, 4 Wire to 2-Wire
-
1
5
dBrnC
-
-89
-85
dBm0p
Absolute Delay
(Note 3)
2-Wire to 4-Wire, 4 Wire to 2-Wire
-
-
2
ms
Trans Hybrid Loss
Balance Network Set Up for 600
Termination at
1kHz
36
40
-
dB
Overload Level
V
B
+ = +5V
1.5
-
-
V
PEAK
2-Wire to 4-Wire, 4 Wire to 2-Wire
V
B
+ = 12V
1.75
-
-
V
PEAK
Level Linearity
At 1kHz Referenced to 0dBm Level (Note 3)
2-Wire to 4-Wire, 4 Wire to 2-Wire
+3 to -40dBm
-
-
0.05
dB
-40 to -50dBm
-
-
0.1
dB
-50 to -55dBm
-
-
0.3
dB
Power Supply Rejection Ratio
(Note 3)
V
B
+ to 2-Wire
30 - 60Hz, R
L
= 600
15
-
-
dB
V
B
+ to Transmit
15
-
-
dB
V
B
- to 2-Wire
15
-
-
dB
V
B
- to Transmit
15
-
-
dB
Electrical Specifications
Unless Otherwise Specified, V
B
- = -48V, V
B
+ = 12V and 5V, AG = BG = DG = 0V, Typical Parameters
T
A
= 25C. Min-Max Parameters are Over Operating Temperature Range (Continued)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
HC-5504B
4
V
B
+ to 2-Wire
200 - 16kHz, R
L
= 600
30
-
-
dB
V
B
+ to Transmit
30
-
-
dB
V
B
- to 2-Wire
30
-
-
dB
V
B
- to Transmit
30
-
-
dB
Logic Input Current (RS, RC, PD)
0V
V
IN
5V
-
-
100
A
Logic Inputs
Logic `0' V
IL
-
-
0.8
V
Logic `1' V
IH
2.0
-
5.5
V
Logic Outputs
Logic `0' V
OL
I
LOAD
800
A, V
B
+ = 12V, 5V
-
0.1
0.5
V
Logic `1' V
OH
I
LOAD
80
A, V
B
+ = 12V
2.7
5.0
5.5
V
I
LOAD
40
A, V
B
+ = 5V
2.7
-
5.0
V
Electrical Specifications
Unless Otherwise Specified, V
B
- = -48V, V
B
+ = 12V and 5V, AG = BG = DG = 0V, Typical Parameters
T
A
= 25C. Min-Max Parameters are Over Operating Temperature Range (Continued)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Uncommitted Op Amp Specifications
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Offset Voltage
-
5
-
mV
Input Offset Current
-
10
-
nA
Input Bias Current
-
20
-
nA
Differential Input Resistance
(Note 3)
-
1
-
M
Output Voltage Swing
R
L
= 10K, V
B
+ = 12V
-
6.2
6.6
V
PEAK
R
L
= 10K, V
B
+ = 5V
-
3
-
V
PEAK
Output Resistance
A
VCL
= 1 (Note 3)
-
10
-
Small Signal GBW
(Note 3)
-
1
-
MHz
NOTES:
3. These parameters are controlled by design or process parameters and are not directly tested. These parameters are characterized upon initial
design release, upon design changes which would affect these characteristics, and at intervals to assure product quality and specification
compliance.
4. I
LONG
= Longitudinal Current.
HC-5504B
5
Pin Descriptions
24 PIN
SOIC
SYMBOL
DESCRIPTION
1
TIP
An analog input connected to the TIP (more positive) side of the subscriber loop through a 150
feed resistor and a
ring relay contact. Functions with the Ring terminal to receive voice signals from the telephone and for loop
monitoring purposes.
2
RING
An analog input connected to the RING (more negative) side of the subscriber loop through a 150
feed resistor and
a ring relay contact. Functions with the Tip terminal to receive voice signals from the telephone and for loop
monitoring purposes.
3
RFS
Senses ring side of loop for ground key and ring trip detection. During ringing, the ring signal is inserted into the line
at this node and RF is isolated from RFS via a relay.
4
V
B
+
Positive Voltage Source - Most positive supply. V
B
+ is typically 12V or 5V.
5
C
3
Capacitor #3 - An external capacitor to be connected between this terminal and analog ground. Required for proper
operation of the loop current limiting function, and for filtering V
B
-. Typical value is 0.3
F, 30V.
6
DG
(Note 5)
Digital Ground - To be connected to zero potential and serves as a reference for all digital inputs and outputs on the
SLIC microcircuit.
7
RS
Ring Synchronization Input - A TTL-compatible clock input. The clock should be arranged such that a positive pulse
transition occurs on the zero crossing of the ring voltage source, as it appears at the RFS terminal. For Tip side
injected systems, the RS pulse should occur on the negative going zero crossing and for Ring injected systems, on
the positive going zero crossing. This ensures that the ring relay activates and deactivates when the instantaneous
ring voltage is near zero. If synchronization is not required, the pin should be tied to 5V.
8
RD
Relay Driver - A low active open collector logic output. When enabled, the external ring relay is energized.
9
TF
Tip Feed - A low impedance analog output connected to the TIP terminal through a 150
feed resistor. Functions
with the RF terminal to provide loop current, feed voice signals to the telephone set, and sink longitudinal current.
10
RF
Ring Feed - A low impedance analog output connected to the RING terminal through a 150
feed resistor. Functions
with the TF terminal to provide loop current, feed voice signals to the telephone set, and sink longitudinal current.
11
V
B
-
Negative Voltage Source - Most negative supply. V
B
- is typically -48V with an operational range of -42V to -58V.
Frequently referred to as "battery".
12
BG
(Note 5)
Battery Ground - To be connected to zero potential. All loop current and some quiescent current flows into this ground
terminal.
13
SHD
Switch Hook Detection - A low active LS TTL - compatible logic output. This output is enabled for loop currents
exceeding 10mA and disabled for loop currents less than 5mA.
14
GKD
Ground Key Detection - A low active LS TTL - compatible logic output. This output is enabled if the DC current into
the ring lead exceeds the DC current out of the tip lead by more than 20mA, and disabled if this current difference is
less than 10mA.
15
PD
Power Denial - A low active TTL - Compatible logic input. When enabled, the switch hook detect (SHD) and ground
key detect (GKD) are not necessarily valid, and the relay driver (RD) output is disabled.
16
RC
Ring Command - A low active TTL - Compatible logic input. When enabled, the relay driver (RD) output goes low on
the next high level of the ring sync (RS) input, as long as the SLIC is not in the power denial state (PD = 0) or the
subscriber is not already off- hook (SHD = 0).
17
C
2
Capacitor #2 - An external capacitor to be connected between this terminal and digital ground. Prevents false ground
key indications from occurring during ring trip detection. Typical value is 0.15
F, 10V. This capacitor is not used if
ground key function is not required and (Pin 17) may be left open or connected to digital ground.
18
OUT
The analog output of the spare operational amplifier. The output voltage swing is typically
5V.
19
-IN
The inverting analog input of the spare operational amplifier.
20
+IN
The non-inverting analog input of the spare operational amplifier.
HC-5504B
6
Functional Diagram
21
RX
Receive Input, 4-Wire Side - A high impedance analog input which is internally biased. Capacitive coupling to this
input is required. AC signals appearing at this input differentially drive the Tip feed and Ring feed terminals, which in
turn drive tip and ring through 300
of feed resistance on each side of the line.
22
C
4
Capacitor #4 - An external capacitor to be connected between this terminal and analog ground. This capacitor
prevents false ground key indication and false ring trip detection from occurring when longitudinal currents are
induced onto the subscriber loop from near by power lines and other noise sources. This capacitor is also required
for the proper operation of ring trip detection. Typical value is 0.5
F, to 1.0
F, 20V. This capacitor should be
nonpolarized.
23
AG
(Note 5)
Analog Ground - To be connected to zero potential and serves as a reference for the transmit output (TX) and receive
input (RX) terminals.
24
TX
Transmit Output, 4-Wire Side - A low impedance analog output which represents the differential voltage across Tip
and Ring. Transhybrid balancing must be performed (using the SLIC microcircuit's spare op amp) beyond this output
to completely implement two to four wire conversion. This output is unbalanced and referenced to analog ground.
Since the DC level of this output varies with loop current, capacitive coupling to the next stage is essential.
NC
No internal connection.
Pin Descriptions
(Continued)
24 PIN
SOIC
SYMBOL
DESCRIPTION
LOOP
MONITORING
RING
CONTROL
2 WIRE
LOOP
SECONDARY
PROTECTION
LINE
DRIVERS
TIP
RING
V
B
-
V
B
-
PD
POWER DENIAL
150
RING
150
RF
BG
150
TF
TIP
RD
RC
RS
RING SYNC
RING COMMAND
RING
TRIP
SHD
GKD
OUT
RX
RECEIVE
INPUT
SLIC MICROCIRCUIT
1/2 RING
RELAY
V
B
-
RING
VOLTAGE
RFS
1/2 RING
RELAY
150
SWITCH HOOK
DETECTION
GROUND KEY
DETECTION
BATTERY
FEED
LOOP
CURRENT
LIMITER
DIFF
AMP
TX
TRANSMIT
OUTPUT
+
-
+1
-1
OP
AMP
+IN
-IN
+
-
HC-5504B
7
Schematic Diagram
SLIC FUNCTIONAL SCHEMATIC
Pin Numbers for SOIC Package
VB2
VB1
VB2
VB3
VB4
VB5
+5V
IB1 IB2 IB3 IB4 IB5 IB6 IB7 IB8
V
BAT
IB9 IB10 IB11
VB+
VB+
A-100
TRANSV'L
I/V AMP
-
+
IB6
R
6
R
5
R
11
V
B
+
R
7
R
8
R
10
R
9
R
22
R
23
R
3
R
4
R
1
R
2
R
16
R
15
VBAT
V
BAT
R
12
V
BAT
VB+
A-200
LONG'L
I/V AMP
IB7
-
+
R
20
V
BAT
V
B
+
A-400
TIP FEED
AMP
IB4
-
+
RING
FEED
SENSE
V
BAT
V
BAT
5V
VB4
IB8
RING TRIP DETECTOR
+
SWITCH HOOK
VB1
IB6
+
R
18
DETECTOR
VB+
QD28
QD27
VBAT
-
+
-
GND SHORTS
CURRENT
LIMITING
IB1
VB3
THERMAL
LIMITING
VB5
STTL
AND LOGIC
INTERFACE
RFC
SH
GK
VB5
-
+
IB2
LOAD CURRENT
LIMITING
R
14
R
13
V
BAT
VBAT/2 REFERENCE
R
21
V
BAT
A-300
RING FEED
AMP
IB5
-
+
RING
RF
TIP
TF
10
2
3
1
9
RX
C4
V
BAT
BAT
ANA
DIG
V
B
+
GND
GND
GND
21
22
11
12
23
6
4
+
-
OUT
20
19
18
V
BAT
IB3
VB+
V
B
+
5V IB10
VBAT
PD
15
RC
SHD
GKD
C2
16
13
17
14
TX
C3
RS
RD
8
7
24
5
R
17
VB2
VB+
R
19
V
BAT
QD3 QD36
VOLTAGE AND CURRENT
BIAS NETWORK
A-500
OP AMP
HC-5504B
8
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
Overvoltage Protection and Longitudinal
Current Protection
The SLIC device, in conjunction with an external protection
bridge, will withstand high voltage lightning surges and
power line crosses.
High voltage surge conditions are as specified in Table 1.
The SLIC will withstand longitudinal currents up to a
maximum or 30mA
RMS
, 15mA
RMS
per leg, without any
performance degradation.
LOGIC GATE SCHEMATIC
Schematic Diagram
(Continued)
15
5
6
12
4
16
13
A
B
C
C
B
A
TTL
TO
STTL
TTL
TO
STTL
TTL
TO
STTL
TO
R
21
GKD
SHD
RD
PD
RC
RS
C2
TTL
TO
STTL
TTL
TO
STTL
DELAY
LOGIC BIAS
RELAY
DRIVER
SH
GK
11
14
3
9
7
8
10
2
1
SCHOTTKY LOGIC
TABLE 1.
PARAMETER
TEST
CONDITION
PERFORMANCE
(MAX)
UNITS
Longitudinal
Surge
10
s Rise/
1000 (Plastic)
V
PEAK
1000
s Fall
500 (Ceramic)
V
PEAK
Metallic Surge
10
s Rise/
1000 (Plastic)
V
PEAK
1000
s Fall
500 (Ceramic)
V
PEAK
T/GND
10
s Rise/
1000 (Plastic)
V
PEAK
R/GND
1000
s Fall
500 (Ceramic)
V
PEAK
50/60Hz Current
T/GND
11 Cycles
700 (Plastic)
V
RMS
R/GND
Limited to
10A
RMS
350 (Ceramic)
V
RMS
HC-5504B
9
Applications Diagram
FIGURE 1. TYPICAL LINE CIRCUIT APPLICATION WITH THE MONOLITHIC SLIC
Typical Component Values
C
2
= 0.15
F, 10V.
C
3
= 0.3
F, 30V.
C
4
= 0.5
F to 1.0
F, 10%, 20V (Should be nonpolarized).
C
5
= 0.5
F, 20V.
C
6
= C
7
= 0.5
F (10% Match Required) (Note 7).
C
8
= 0.01
F, 100V.
C
9
= 0.01
F, 20V,
20%.
R
1
= R
2
= R
3
= 100k
(0.1% Match Required, 1% absolute
value) ZB = 0 for 600
Terminations (Note 7).
R
B1
= R
B2
= R
B3
= R
B4
= 150
(0.1% Match Required, 1%
absolute value).
R
S1
= R
S2
=1k
, typically.
C
S1
= C
S2
= 0.1
F, 200V typically, depending on V
RING
and line length.
Z
1
= 150V to 200V transient protection.
PTC used as ring generator ballast.
NOTES:
5. Secondary protection diode bridge recommended is a 2A, 200V type.
6. To obtain the specified transhybrid loss it is necessary for the three legs of the balance network, C
6
-R
1
and R
2
and C
7
-ZB-R
3
, to match in
impedance to within 0.3%. Thus, if C
6
and C
7
are 1
F each, a 20% match is adequate. It should be noted that the transmit output to C
6
sees
a -22V step when the loop is closed. Too large a value for C
6
may produce an excessively long transient at the op amp output to the PCM
Filter/CODEC.
A 0.5
F and 100k
gives a time constant of 50ms. The uncommitted op amp output is internally clamped to stay within
6.6V and is current
limited.
7. All grounds (AG, BG, and DG) must be applied before V
B
+ or V
B
-. Failure to do so may result in premature failure of the part. If a user wishes
to run separate grounds off a line card, the AG must be applied first.
8. Application shows Ring Injected Ringing, Balanced or Tip injected configuration may be used.
9. Pin numbers given for SOIC package.
R
B4
K
1B
K
1A
RING
RING FEED
RING FEED SENSE
TIP
V
B
-
SLIC
HC-5504B
R
S1
R
B2
R
B1
PTC
Z
1
-48V
150V
PEAK
(MAX)
RING GENERATOR
RING
R
B3
R
S2
C
S2
SUBSCRIBER
LOOP
-48V
SYSTEM CONTROLLER
K
1
8
1
9
10
3
2
1
TIP FEED
TIP
RD
OP AMP
RX
TX
+IN
-IN
OUT
C2
C3
C4
NEG.
BATT.
BATT.
GND.
DIG.
GND.
ANA.
GND.
V
B
+
POWER
DENIAL
SWITCH
HOOK
DETECT
GROUND
KEY
DETECT
RING
SYNC
RING
CMD
15
13
14
7
16
11
12
6
23
C
9
4
V
B
+
C
8
C
4
C
3
C
2
+
+
21
24
20
19
18
17
5
22
C
6
R
1
R
2
C
7
C
5
R
3
BALANCE NETWORK
PCM
FILTER/
CODEC
SWITCHING
NETWORK
ZB
5V TO
12V
PRIMARY
PROTECTION
C
S1
HC-5504B
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