ChipFind - документация

Электронный компонент: HA16113FPJ

Скачать:  PDF   ZIP
HA16113FPJ
Dual Watchdog Timers
The HA16113FPJ is a multifunction device that provides microprocessor systems with the necessary
regulated power supply, monitors the supply voltage, and generates power-on reset and watchdog reset
signals. It is ideally suited for battery-operated systems such as instrumentation systems.
Functions
Regulated power supply
Power-on reset
Two built-in auto-reset circuits
Two built-in watchdog timer circuits (WDT)
Output voltage monitoring (LVI)
Features
Simultaneous or independent control of auto-reset outputs.
Precisely regulated output voltage and accurate
NMI trigger voltage (both 2%).
Low-voltage control with
NMI, simultaneous RES1 and RES2, and STBY outputs.
Independently selectable durations for power-on reset and auto-reset: power-on duration is common to
both reset outputs; auto-reset durations can be selected independently.
Reset command input pin (
CONT) for second reset output (RES2).
WDT filter function detects minimum pulse width and maximum period of P-RUN input pulses.
HA16113FPJ
2
Pin Arrangement
(Top view)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
P-RUN1
Cf1
Rf
C
R1
STBY
adj
STBY
RES
1
NMI
NMI
adj
Re1
Re2
GND
P-RUN2
Cf2
R
R
C
R2
SW
CONT
RES
2
C
RES
V
OUT
V
CONT
CS
V
CC
Pin Description
Pin No. Symbol
Function
1
P-RUN1
Input from main CPU to watchdog timer 1 (WDT1)
2
Cf1
For connecting capacitor Cf1 to determine WDT1 filter characteristic (frequency band)
3
Rf
For connecting common bias resistor Rf to determine WDT1 and WDT2 filter
characteristics (frequency band), power-on reset time (t
on
, common to
RES1
and
RES2
), clock-off time of auto-reset circuits 1 and 2, reset high time (t
RH1
and t
RH2
),reset
low time (t
RL1
and t
RL2
), and reset pulse delay at voltage drop and recovery. Use the
resistor value from 100 k
to 500 k
.
4
C
R1
For connecting capacitor C
R1
to determine t
on
for power-on reset and t
off1
, t
RH1
, and t
RL1
of auto-reset circuit 1.
5
STBY
adj
For adjusting standby trigger voltage (insert a resistor between this pin and ground)
Recommended range: V
H2
= 2.8 to 4.0 V
6
STBY
Standby signal output
7
RES1
Reset signal output to main CPU
8
NMI
Low-voltage interrupt signal output for memory backup
HA16113FPJ
3
Pin Description (cont)
Pin No. Symbol
Function
9
NMI
adj
For fine adjustment of Vout trigger level for
NMI
signal (insert a resistor between this
pin and Vout or ground)
Recommended range: V
H1
= 4.4 to 5.2 V
10
Re1
For connecting resistor Re1 to determine voltage Vout for microprocessor and IC
internal circuits (insert between this pin and Re2)
11
Re2
For connecting resistor Re2 to determine voltage Vout for microprocessor and IC
internal circuits (insert between this pin and ground)
12
GND
Ground
13
V
CC
Power supply input pin (operating range: 6 to 40 V)
14
CS
Input for detecting power supply current
15
V
C
For base control of external pnp transistor
16
Vout
Regulated voltage supplied to microprocessor and IC internal circuits Connect to
collector of external pnp transistor
17
C
RES
Determines reset pulse delay at voltage drop and recovery.
NMI
output goes low as
soon as Vout drops below
NMI
trigger level. If Vout remains below this level for time
t
RES
, both reset outputs also go low. When Vout recovers above
NMI
trigger level, first
NMI
output goes high, then after time t
r
both reset outputs also go high. Times t
RES
and
t
r
are adjusted by capacitor C
RES
inserted between this pin and ground.
18
RES2
Reset signal output to sub CPU
19
CONT
Input pin for resetting sub CPU on command, or when sub CPU crashes Low input at
CONT
causes low output at
RES2
20
SW
Selects simultaneous control, in which main and sub CPUs are both reset when main
CPU crashes, or independent control, in which sub CPU is reset independently of
main CPU
Open--independent control; connected to ground--simultaneous control
21
C
R2
For connecting capacitor C
R2
to determine t
off2
, t
RH2
, and t
RL2
of auto-reset circuit 2
22
R
R
For connecting bias resistor R
R
to determine t
off1
, t
off2
, t
RH1
, t
RH2
, t
RL1
, and t
RL2
. Use the
resistor value from 100 k
to 500 k
.
23
Cf2
For connecting capacitor Cf2 to determine WDT2 filter characteristic (frequency band)
24
P-RUN2
Input from sub CPU to watchdog timer 2 (WDT2)
HA16113FPJ
4
Block Diagram
V
OUT
V
CONT
V
CC
CS
Detection
block
Over
voltage
detection
block
Re1
Re2
NMI
STBY
16
15
14
13
10
11
8
6
7
20
18
19
22
3
12
23
24
21
17
1
2
4
9
5
Regulator block
RES
1
SW
RES
2
CONT
R
R
Rf
GND
Cf2
Cf1
C
R1
NMI
adj
STBY
adj
STBY
detection
block
P-RUN2
P-RUN1
C
RES
C
R2
I
1
I
2
Auto-reset circuit 2
Auto-reset circuit 1
Delay circuit block
NMI
detection
block
71 k
3.3 k
2 k
3.3 k
80 k
31.2 k
69.7k
25 k
19 k
8.4 k
3.3 k
3.3 k
33 k
I/6
20 k
36.8 k
--
+
--
+
--
+
I
I*4/3
19*I
+
--
+
--
--
+
Reference
voltage
circuit
HA16113FPJ
5
Timing Waveforms
V
BATT
Vout
NMI
STBY
P-RUN1
P-RUN2
RES1
CONT
RES2
Note: SW pin is connected to ground.
4.7 V
4.5 V
4.6 V
4.7 V
3.0 V (V )
STBY
4.6 V (V )
NMI
ton
t
OFF1
tr
t
RES
ton
t
OFF1
tr
t
RES
t
RH1
t
RL1
t
OFF2
Crash
Crash
HA16113FPJ
6
Absolute Maximum Ratings (Ta = 25C)
Item
Symbol
Value
Unit
V
CC
power supply voltage
V
CC
40
V
CS voltage
V
CS
40
V
Control pin voltage
V
C
40
V
Control pin current
I
C
20
mA
Vout voltage
Vout
10
V
P-RUN voltage
V
PRUN
Vout
V
SW voltage
V
SW
Vout
V
CONT
voltage
V
CONT
Vout
V
RES
current
I
RES
5
mA
NMI
current
I
NMI
5
mA
STBY
current
I
STBY
5
mA
Power dissipation
Note
P
T
600
mW
Operating temperature
Topr
40 to +85
C
Storage temperature
Tstg
50 to +125
C
Note:
At ambient temperatures up to Ta = 60
C. Derated by 9.8 mW/
C above this point.
HA16113FPJ
7
Electrical Characteristics (Ta = 25C, Rf = 180 k , Cf1
= Cf2 = 0.01 F, C
R1
= C
R2
= 0.1 F)
Item
Symbol
Min
Typ
Max
Unit
Test Conditions
Chip
Power supply current
I
CC
--
10
15
mA
Regulator
Output voltage
Vo1
4.875 5.00
5.125 V
V
CC
= 6 to 17.5 V
V
C
current = 5 mA
Vo2
4.80
5.00
5.20
V
V
CC
= 6 to 17.5 V
V
C
current = 10 mA
Stability with respect to line
voltage
Voline
50
--
50
mV
V
CC
= 6 to 17.5 V
V
C
current = 10 mA
Stability with respect to
load current
Voload
100
--
100
mV
V
C
current = 0.1 to 15
mA
Ripple rejection
RREJ
45
75
--
dB
Vi = 0.5 Vrms
fi = 1 kHz
Short-circuit detection
voltage
Vos
0.08
0.14
0.20
V
Temperature coeffi-
cient of output voltage
Vo/
T
--
40
--
ppm/
C
Maximum adjustable
output voltage
Vomax
--
--
7.0
V
P-RUN1/2
Low input voltage
V
IL1, 2
--
--
0.8
V
input section
High input voltage
V
IH1, 2
2.0
--
--
V
High input current
I
IH1, 2
--
0.3
0.5
mA
V
IH
= V
OL
Watchdog
Power-on time
t
on
25
40
60
ms
section (both
Clock-off time (1)
t
off1
80
130
190
ms
R
R
: open
RES1
and
Reset low time (1)
t
RL1
15
20
30
ms
R
R
: open
RES2
outputs)
Reset high time (1)
t
RH1
40
60
90
ms
R
R
: open
Clock-off time (2)
t
off2
25
40
60
ms
R
R
: = 75 k
Reset low time (2)
t
RL2
4
6
9
ms
R
R
: = 75 k
Reset high time (2)
t
RH2
15
20
30
ms
R
R
: = 75 k
LVI section
NMI
trigger voltage
V
NMI
4.45
4.60
4.75
V
Hysteresis width of above
V
HYSN
25
50
100
mV
STBY
trigger voltage
V
STBY
2.70
3.00
3.30
V
Hysteresis width of above
V
HYSS
1.35
1.50
1.65
V
RES
pulse
Drop
t
RES
--
200
--
s
C
RES
= 1500 pF
delay time
Recovery
t
r
--
200
--
s
C
RES
= 1500 pF
HA16113FPJ
8
Electrical Characteristics (Ta = 25C, Rf
= 180 k , Cf1
= Cf2 = 0.01 F, C
R1
= C
R2
= 0.1 F) (cont)
Item
Symbol
Min
Typ
Max
Unit
Test Conditions
NMI
output
NMI
low voltage
V
OL1
--
--
0.4
V
I
OL1
= 2 mA
section
NMI
high voltage
V
OH1
--
V
O1
--
V
NMI
function initial voltage
V
STN
--
0.7
1.0
V
STBY
output
STBY
low voltage
V
OL2
--
--
0.4
V
I
OL2
= 2 mA
section
STBY
high voltage
V
OH2
--
V
O1
--
V
STBY
function initial
voltage
V
STS
--
0.7
1.0
V
RES
1/2 output
RES
1/2 low voltage
V
OL3
--
--
0.4
V
I
OL3, 4
= 2 mA
section
RES
1/2 high voltage
V
OH3
--
V
O1
--
V
RES
1/2 function initial
voltage
V
STR
--
0.7
1.0
V
CONT
and SW
Low input voltage
V
IL3
--
--
0.8
V
input section
High input voltage
V
IH3
2.0
--
--
V
Low input current
I
IL3
120
60
--
A
V
IL3
= 0 V
High input current
I
IH3
--
0.3
0.5
mA
V
IH3
= V
OL
LVI section
Temperature coefficient of
NMI trigger voltage
V
H1
/
T
--
100
--
ppm/
C
Temperature coefficient of
STBY trigger voltage
V
H2
/
T
--
200
--
ppm/
C
HA16113FPJ
9
External Circuit Constant Calculations
Equations for the various functions are given below. C
R1
and Cf1 are for
RES1. C
R2
and Cf2 are for
RES2. (Values
given in equations are for reference.)
Item
Equation
Remarks
Regulated
output voltage
Vout = 0.388
Re2
Re1
+ 2.63
If the desired Vout is 5 V
2.5%, recommended
values are Re1 = 1.5 k
and Re2 = 9.1 k
Vout
HA16113FPJ
Re1
Re2
Short-circuit
detection
voltage
V
CS
< Iout
R
CS
When this function
operates, V
CONT
stops
drawing current from the
base of the external
transistor, so Vout output
stops
Iout
R
CS
Re1
CC
C
S
V
C
Vout
Re2
GND
V
Maximum
output voltage
Vout Max < 7.0 V
Prevents microprocessor damage that would result if
the output voltage were raised too high by mistake.
The maximum output voltage is fixed.
t
RH
, t
RL
(for
both
RES1
and
RES2
)
t = 3.2 C R'
t = 1.1 C R'
1
RH
RL
R
R
R' =
1
Rf
+
1
R
R
Determines the
frequency and duty cycle
of the reset pulse
RL
t
RES
RH
t
t
ON
(for both
RES1
and
RES2
)
t
ON
= 2.2
C
R
Rf
Sets the time from the
rise of Vout to the
clearing of
RES
output
Vout
RES
t
ON
t
OFF
(for both
RES1
and
RES2
)
t
OFF
= 6.1 C R'
R
1
R' =
1
Rf
+
1
R
R
Sets the time from when
P-RUN pulses stop until
the reset pulse is output
P-RUN
RES
t
OFF
tr, t
RES
(for
both
RES1
and
RES2
)
t
r
= 0.75
C
RES
Rf
t
RES
= 0.625
C
RES
Rf
tr sets the time from the rise of
NMI
to the rise of
RES
, when Vout drops by more than the
STBY
trigger
voltage, then recovers. t
RES
is the time from the fall of
NMI
to the fall of
RES
.
Vout
NMI
RES
4.6 V (typ)
4.65 V (typ)
t
r
t
RES
HA16113FPJ
10
External Circuit Constant Calculations (cont)
Item
Equation
Remarks
V
NMI
V = 1.2 1 +
(R1 // 71.7)
(R2 // 25)
NMI
NMI recovery voltage
(V high) is:
NMI
V high =
86.65
R1
NMI
+
86.65
R2 // 25
+ 1.2
1 +
73.8
R1
(R1 and R2 are in k )
Voltage at which the
NMI
signal is output when Vout
drops. The
NMI
trigger voltage and
NMI
recovery voltage
can be trimmed by connecting resistors between the
NMI
adj pin and Vout (R1), and between
NMI
adj and GND
(R2).
Vout
R1
NMIadj
R2
NMI
Vout
NMI
V
NMI
V high
NMI
t
V
STBY
(R3 is in k )
V =
71
31.2 + (36.8 // R3)
STBY
1 +
1.47
Voltage at which the
STBY
signal is output when Vout
drops. The
STBY
trigger voltage can be adjusted by
connecting a resistor (R3) between the
STBY
adj pin and
GND. The
STBY
recovery voltage cannot be adjusted.
Vout
STBYadj
R3
STBY
Vout
STBY
V
STBY
V high
STBY
t
WDT.
Line1 =
0.31 (Du 24)
Cf Rf
Line2 = Du (= 25%)*
Line3 =
0.015
Cf Rf
Line4 =
1 Du
2.1 t
RH
Line5 = 99%
Du is the duty cycle of the P-RUN
pulse.
*
Du =
t
t + t
RH
RL RH
Note: Line2 and Line5 are fixed.
The watchdog timer function determines whether the P-
RUN pulse is normal or not. A reset pulse is output if P-
RUN is determined to be abnormal. The normal region is
the part bounded by Line1 to Line3 (or Line4) in the
diagram. Line4 applies in certain cases, depending on
C
R
, Cf, and the state of P-RUN.
Line1
Line4
Line5
Line2
Line3
Normal area
Frequency
(Hz)
Duty
(%)
HA16113FPJ
11
Operating Interconnections (example)
GND
Re2
Re1
NMI
adj
NMI RES1 STBY STBY
adj
CR1
Rf
Cf1 P-RUN1
V
CC
CS
VC
Vout CRES RES2 CONT SW
CR2
R
R
Cf2 P-RUN2
HA16113
RES
STBY
NMI
PORT
MAIN
CPU
PORT
NMI
PORT
RES
STBY
SUB
CPU
V
CC
V
CC
SYSTEM
V
CC
Batt.
HA16113FPJ
12
Characteristic Curves
Vout characteristic
Watchdog timer characteristic
10 k
1 k
100
10
20
0
40
60
80
100 (%)
Normal area
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4
6
8
10
12
14
16
Re1 = 1.5 k
Re1 = 1 k
Re1 = 2 k
Regulated
output
voltage (V)
Re2 resistance (k )
Test circuit
P-RUN1
P-RUN2
F
R
R C C
F
0.01
F
0.1
F
180 k
I
CONT
5 mA
V
CC
V
CONT
V
OUT
HA16113FPJ
Re1
Re2
R
L
HA16113FPJ
13
R
Cf = 0.22
F
Cf = 0.1
F
Cf = 0.047
F
ton characteristic
140
120
100
80
60
40
20
0
60
100
140
180
220
260
toff characteristic
400
300
200
100
0
60
100
140
180
220
260
toff (ms)
ton (ms)
RES1
RES2
Vary the external capacitance (C ) and
resistance (Rf) and measure the variation
in t
off
. (Same for RES1 and RES2)
R
C = 0.22
F
C = 0.1
F
C = 0.047
F
12 V
C
R1
, C
R2
RES1, RES2
R
f
NMI
Measure with
oscilloscope
Vary the external capacitance (C ) and
resistance (Rf) that determine the ton time
and measure the variation in ton.
(Same for RES1 and RES2)
R
f
resistance (k )
R
f
resistance (k )
R
R
R
HA16113FPJ
14
t characteristic
RH
180
140
100
60
20
60
100
140
180
220
260
t (ms)
RH
Vary the external capacitance (C ) and
resistance (Rf) and measure the variation
in t . (Same for RES1 and RES2)
R
RH
C = 0.22
F
C = 0.1
F
C = 0.047
F
Rf resistance (k )
60
100
140
180
220
260
t (ms)
RL
C = 0.22
F
C = 0.1
F
C = 0.047
F
t characteristic
60
40
20
0
Vary the external capacitance (C ) and
resistance (Rf) and measure the variation
in t . (Same for RES1 and RES2)
R
RL
RL
RES1
RES2
R
R
R
RES1
RES2
Rf resistance (k )
R
R
R
HA16113FPJ
15
CRES = 740 pF
CRES = 1500 pF
CRES = 3300 pF
tr characteristic (for both RES1 and RES2)
Rf resistance (k )
800
600
400
200
0
60
100
140
180
220
260
tr (
s)
CRES = 740 pF
CRES = 1500 pF
CRES = 3300 pF
t characteristic (for both RES1 and RES2)
RES
600
500
400
300
200
100
0
60
100
140
180
220
260
t (
s)
RES
12 V
CRES
RES2
NMI
Measure with
oscilloscope
R
f
Rf resistance (k )
12 V
CRES
RES2
NMI
Measure with
oscilloscope
R
f
HA16113FPJ
16
Precautions
If the IC's ground potential varies suddenly by several volts due to wiring impedance (see figure 7), a false
RES pulse may be output. The reason for this is that potentials in the RES pulse generating circuit change
together with the Vout-GND potential. The reference potential of the comparator in figure 8 and the
potential of the external capacitor have different impedances as seen from the comparator, causing a
momentary inversion. The solution is to stabilize the ground potential. Two ways of stabilizing the IC's
ground line are:
Separate the IC's ground line from high-current ground lines.
Increase the capacitance (Co) used to smooth the Vout output.
Wiring impedance
HA16113FPJ
Co
R
L
SW2
SW1
V
IGN
Wiring impedance
Relay or other load
Figure 1 Typical Circuit
GND
RES
Vout
Vcont
V
CC
+
C
RES
Wiring impedance
Figure 2
RES Comparator
HA16113FPJ
17
Package Dimensions
Hitachi Code
JEDEC
EIAJ
Mass (reference value)
FP-24D
Conforms
--
0.6 g
Unit: mm
*Dimension including the plating thickness
Base material dimension
*0.17
0.05
11.8
0.3
8.4
2.50 Max
15.8
16.2 Max
1.12 Max
24
13
1
12
0
8
1.0
0.2
0.20
0.15
M
0.20
0.10
1.27
*0.40
0.08
1.7
0.38
0.06
0.15
0.04
HA16113FPJ
18
Cautions
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi's or any third party's patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
Hitachi bears no responsibility for problems that may arise with third party's rights, including
intellectual property rights, in connection with use of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi's sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as fail-
safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without
written approval from Hitachi.
7. Contact Hitachi's sales office for any questions regarding this document or Hitachi semiconductor
products.
Hitachi, Ltd.
Semiconductor & Integrated Circuits.
Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan
Tel: Tokyo (03) 3270-2111 Fax: (03) 3270-5109
Copyright ' Hitachi, Ltd., 1998. All rights reserved. Printed in Japan.
Hitachi Asia Pte. Ltd.
16 Collyer Quay #20-00
Hitachi Tower
Singapore 049318
Tel: 535-2100
Fax: 535-1533
URL
NorthAmerica
: http:semiconductor.hitachi.com/
Europe
: http://www.hitachi-eu.com/hel/ecg
Asia (Singapore)
: http://www.has.hitachi.com.sg/grp3/sicd/index.htm
Asia (Taiwan)
: http://www.hitachi.com.tw/E/Product/SICD_Frame.htm
Asia (HongKong)
: http://www.hitachi.com.hk/eng/bo/grp3/index.htm
Japan
: http://www.hitachi.co.jp/Sicd/indx.htm
Hitachi Asia Ltd.
Taipei Branch Office
3F, Hung Kuo Building. No.167,
Tun-Hwa North Road, Taipei (105)
Tel: <886> (2) 2718-3666
Fax: <886> (2) 2718-8180
Hitachi Asia (Hong Kong) Ltd.
Group III (Electronic Components)
7/F., North Tower, World Finance Centre,
Harbour City, Canton Road, Tsim Sha Tsui,
Kowloon, Hong Kong
Tel: <852> (2) 735 9218
Fax: <852> (2) 730 0281
Telex: 40815 HITEC HX
Hitachi Europe Ltd.
Electronic Components Group.
Whitebrook Park
Lower Cookham Road
Maidenhead
Berkshire SL6 8YA, United Kingdom
Tel: <44> (1628) 585000
Fax: <44> (1628) 778322
Hitachi Europe GmbH
Electronic components Group
Dornacher Stra
e 3
D-85622 Feldkirchen, Munich
Germany
Tel: <49> (89) 9 9180-0
Fax: <49> (89) 9 29 30 00
Hitachi Semiconductor
(America) Inc.
179 East Tasman Drive,
San Jose,CA 95134
Tel: <1> (408) 433-1990
Fax: <1>(408) 433-0223
For further information write to: