Datasheet HA16113FPJ Datasheet (HIT)

Page 1

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.

Page 2

HA16113FPJ

Pin Arrangement

P-RUN1

Cf1

STBYadj

STBY

RES1

NMI

NMIadj

Re1

Re2

GND

(Top view)

P-RUN2

Cf2

CONT

RES2

RES

OUT

CONT

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

4CR1For connecting capacitor CR1 to determine ton for power-on reset and t

5 STBY adj For adjusting standby trigger voltage (insert a resistor between this pin and ground)

6 STBY Standby signal output 7 RES1 Reset signal output to main CPU 8 NMI Low-voltage interrupt signal output for memory backup

characteristics (frequency band), power-on reset time (t RES2), clock-off time of auto-reset circuits 1 and 2, reset high time (t low time (t resistor value from 100 kΩ to 500 kΩ.

RL1

and t

), and reset pulse delay at voltage drop and recovery. Use the

RL2

, common to RES1 and

of auto-reset circuit 1.

Recommended range: V

= 2.8 to 4.0 V

RH1

off1

and t

, t

RH1

),reset

RH2

, and t

RL1

Page 3

HA16113FPJ

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

10 Re1 For connecting resistor Re1 to determine voltage Vout for microprocessor and IC

11 Re2 For connecting resistor Re2 to determine voltage Vout for microprocessor and IC

12 GND Ground 13 V

14 CS Input for detecting power supply current 15 V

16 Vout Regulated voltage supplied to microprocessor and IC internal circuits Connect to

17 C

RES

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

20 SW Selects simultaneous control, in which main and sub CPUs are both reset when main

21 C 22 R

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)

pin and Vout or ground) Recommended range: V

= 4.4 to 5.2 V

internal circuits (insert between this pin and Re2)

internal circuits (insert between this pin and ground)

Power supply input pin (operating range: 6 to 40 V)

For base control of external pnp transistor

collector of external pnp transistor 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

, both reset outputs also go low. When Vout recovers above NMI trigger level, first

RES

NMI output goes high, then after time t t

are adjusted by capacitor C

RES

both reset outputs also go high. Times t

inserted between this pin and ground.

RES

CONT causes low output at RES2

CPU crashes, or independent control, in which sub CPU is reset independently of main CPU

Open—independent control; connected to ground—simultaneous control For connecting capacitor CR2 to determine t For connecting bias resistor RR to determine t

resistor value from 100 kΩ to 500 kΩ.

off2

, t

off1

RH2

, t

, and t

off2

of auto-reset circuit 2

RL2

, t

RH1

RH2

RL1

, and t

. Use the

RL2

and

Page 4

HA16113FPJ

Block Diagram

STBY

adj

NMI

adj

Cf1

P-RUN1

RES

36.8 k

I/6

STBYdetection block

71 k

—

31.2 k +

19*I

— +

16 15 14 13

3.3 k

NMI detection block

2 k

80 k

69.7k

25 k

19 k

8.4 k

33 k

I*4/3

Delay circuit block

Auto-reset circuit 2

OUT

Over voltage detection block

— +

+ —

20 k

CONT

3.3 k

Regulator block

Auto-reset circuit 1

+ —

Reference

— +

Detection block

voltage

circuit

3.3 k

Re2

8 6

RES1 7

RES2

Re1

NMI

STBY

P-RUN2

Cf2

24 23

RfGND

1922312

CONTR

Page 5

Timing Waveforms

BATT

HA16113FPJ

Vout

NMI

STBY

P-RUN1

P-RUN2

RES1

4.7 V

4.5 V

OFF1

4.6 V 4.7 V

Crash

RES

4.6 V (V )

NMI

3.0 V (V )

STBY

Crash

CONT

RES2

RL1

OFF1

Note: SW pin is connected to ground.

RH1

RES

OFF2

Page 6

HA16113FPJ

Absolute Maximum Ratings (Ta = 25°C)

Item Symbol Value Unit

power supply voltage V

CS voltage V Control pin voltage V Control pin current I

Vout voltage Vout 10 V P-RUN voltage V SW voltage V

CONT voltage V RES current I NMI current I STBY current I

Power dissipation

Note

PRUN

CONT

RES

NMI

STBY

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.

40 V 40 V 40 V 20 mA

Vout V Vout V Vout V 5mA 5mA 5mA 600 mW

Page 7

HA16113FPJ

Electrical Characteristics (Ta = 25°C, Rf = 180 k , Cf1 = Cf2 = 0.01 µF, CR1 = CR2 = 0.1 µF)

Item Symbol Min Typ Max Unit Test Conditions

Chip Power supply current I

Regulator Output voltage Vo1 4.875 5.00 5.125 V VCC = 6 to 17.5 V

Vo2 4.80 5.00 5.20 V VCC = 6 to 17.5 V

Stability with respect to line

Voline –50 — 50 mV VCC = 6 to 17.5 V

voltage Stability with respect to

Voload –100 — 100 mV VC current = 0.1 to 15

load current Ripple rejection RREJ 45 75 — dB Vi = 0.5 Vrms

Short-circuit detection

Vos 0.08 0.14 0.20 V

voltage Temperature coeffi-

σVo/σT — –40 — ppm/

cient of output voltage Maximum adjustable

Vomax — — 7.0 V

output voltage

P-RUN1/2 Low input voltage V input section

High input voltage V High input current I

Watchdog Power-on time t section (both

Clock-off time (1) t

RES1 and RES2 outputs)

Reset low time (1) t Reset high time (1) t Clock-off time (2) t Reset low time (2) t Reset high time (2) t

LVI section NMI trigger voltage V

Hysteresis width of above V STBY trigger voltage V Hysteresis width of above V RES pulse Drop t

delay time

Recovery t

IL1, 2

IH1, 2

off1

RL1

RH1

off2

RL2

RH2

NMI

HYSN

STBY

HYSS

RES

—1015mA

current = 5 mA

current = 10 mA

fi = 1 kHz

°C

— — 0.8 V

2.0 — — V — 0.3 0.5 mA VIH = V

25 40 60 ms 80 130 190 ms RR: open 15 20 30 ms RR: open 40 60 90 ms RR: open 25 40 60 ms RR: = 75 kΩ 469msR

: = 75 kΩ

15 20 30 ms RR: = 75 kΩ

4.45 4.60 4.75 V 25 50 100 mV

2.70 3.00 3.30 V

1.35 1.50 1.65 V — 200 — µsC — 200 — µsC

= 1500 pF

RES

= 1500 pF

RES

Page 8

HA16113FPJ

Electrical Characteristics (Ta = 25°C, Rf = 180 k , Cf1 = Cf2 = 0.01 µF, CR1 = CR2 = 0.1 µF) (cont)

Item Symbol Min Typ Max Unit Test Conditions

NMI output NMI low voltage V section

NMI high voltage V NMI function initial voltage V

STBY output STBY low voltage V

section

STBY high voltage V STBY function initial

voltage

RES1/2 output RES1/2 low voltage V section

RES1/2 high voltage V RES1/2 function initial

voltage

CONT and SW Low input voltage V input section

High input voltage V Low input current I High input current I

LVI section Temperature coefficient of

NMI trigger voltage Temperature coefficient of

STBY trigger voltage

OL1

OH1

STN

OL2

OH2

STS

OL3

OH3

STR

IL3

IH3

IL3

IH3

— — 0.4 V I —VO1—V — 0.7 1.0 V — — 0.4 V I —VO1—V — 0.7 1.0 V

— — 0.4 V I —VO1—V — 0.7 1.0 V

— — 0.8 V

2.0 — — V –120 –60 — µAV — 0.3 0.5 mA V

δVH1/δT — 100 — ppm/

°C

δVH2/δT — 200 — ppm/

°C

= 2 mA

OL1

= 2 mA

OL2

OL3, 4

= 0 V

IL3

= V

IH3

= 2 mA

Page 9

HA16113FPJ

External Circuit Constant Calculations

Equations for the various functions are given below. CR1 and Cf1 are for RES1. CR2 and Cf2 are for RES2. (Values given in equations are for reference.)

Item Equation Remarks

Regulated output voltage

Short-circuit detection voltage

Vout = 0.388×

VCS < Iout × R

Re2 Re1

+ 2.63

If the desired Vout is 5 V ± 2.5%, recommended values are Re1 = 1.5 kΩ and Re2 = 9.1 kΩ

When this function operates, V

CONT

stops drawing current from the base of the external transistor, so Vout output stops

HA16113FPJ

Re1 Re2

Iout

CCCSVC

Re2 GND

Re1

Vout

Maximum output voltage

tRH, tRL (for both RES1 and RES2)

tON (for both

RES1 and RES2)

(for both

OFF

RES1 and RES2)

tr, t

(for

RES

both RES1 and RES2)

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 = 3.2 C R’

t = 1.1 C R’

R’ =

1 +

Determines the frequency and duty cycle

of the reset pulse

tON = 2.2 × CR × Rf Sets the time from the

RES

Vout

rise of Vout to the

OFF

= 6.1 C R’×R×1R’ =

OFF

tr = 0.75 × C t

= 0.625 × C

RES

× Rf

RES

× Rf

clearing of RES output

Sets the time from when P-RUN pulses stop until

the reset pulse is output

RES

P-RUN

RES

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

is the time from the fall of

RES

NMI to the fall of RES.

4.65 V (typ)

Vout

4.6 V (typ) NMI RES

RES

Page 10

HA16113FPJ

External Circuit Constant Calculations (cont)

Item Equation Remarks

NMI

V = 1.2 1 +×

NMI

NMI recovery voltage (V high) is:

NMI

V high =

NMI

86.65

1 +

73.8

(R1 // 71.7)

(R2 // 25)

86.65

R2 // 25

+ 1.2

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 NMIadj pin and Vout (R1), and between NMIadj and GND (R2).

Vout

NMIadj

NMI

Vout

NMI

V high

NMI

STBY

WDT.

Ω(R1 and R2 are in k )

V =

STBY

1.47×

Line1 =

1 +

0.31 (Du – 24) Cf Rf

31.2 + (36.8 // R3)

(R3 is in k )

Ω

Line2 = Du (= 25%)* Line3 =

Line4 =

Line5 = 99%

0.015

Cf Rf 1 – Du

2.1 t *

Du is the duty cycle of the P-RUN pulse.

Du =

t + t

RL RH

Note: Line2 and Line5 are fixed.

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 STBYadj pin and GND. The STBY recovery voltage cannot be adjusted.

V high

Vout

STBYadj

STBY

Vout

STBY

The watchdog timer function determines whether the PRUN pulse is normal or not. A reset pulse is output if PRUN 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

, Cf, and the state of P-RUN.

(Hz)

Line1

Normal area

Frequency

Line2

Line3

Line4

Line5

Duty (%)

Page 11

Operating Interconnections (example)

HA16113FPJ

RES

STBY

NMI

MAIN

CPU

GND Re2 Re1 NMI

CS VC Vout CRES RES2 CONT SW CR2 RRCf2 P-RUN2

Batt.

NMI RES1 STBY STBY

adj

HA16113

SYSTEM V

CR1 Rf Cf1 P-RUN1

adj

PORT

NMI

STBY

PORT

SUB CPU

PORT

RES

Page 12

HA16113FPJ

Characteristic Curves

10 k

1 k

100

Watchdog timer characteristic

Normal area

P-RUN1 P-RUN2

R C C

0.01 µF

0.1 µF180 kΩ

Test circuit

200 40 60 80 100 (%)

Regulated output voltage (V)

5.4

5.3

5.2

5.1

5.0

4.9

4.8

4.7

4 6 8 10 12 14 16

Vout characteristic

Re1 = 1.5 kΩRe1 = 1 kΩ Re1 = 2 kΩ

Re2 resistance (k )Ω

CONT

5 mA

CCVCONTVOUT

HA16113FPJ

Re1 Re2

Page 13

ton (ms)

140 120 100

12 V

RES1, RES2

CR1, CR2

Rf NMI

ton characteristic

Vary the external capacitance (C ) and resistance (Rf) that determine the ton time and measure the variation in ton. (Same for RES1 and RES2)

Measure with oscilloscope

HA16113FPJ

Cf = 0.22 µF

Cf = 0.1 µF

40 20

60 100 140 180 220 260

f resistance (k )Ω

characteristic

off

Cf = 0.047 µF

400

Vary the external capacitance (C ) and resistance (Rf) and measure the variation in t

. (Same for RES1 and RES2)

off

RES1 RES2

300

C = 0.22 µF

(ms)

off

200

C = 0.1 µF

100

60 100 140 180 220 260

Rf resistance (k )Ω

Ω

C = 0.047 µF

Page 14

HA16113FPJ

t characteristic

t (ms)

Vary the external capacitance (C ) and resistance (Rf) and measure the variation

in t . (Same for RES1 and RES2)

RES1 RES2

C = 0.22 µF

C = 0.1 µF

C = 0.047 µF

60 100 140 180 220 260

Rf resistance (k )

Ω

t (ms)

t characteristic

180

Vary the external capacitance (C ) and resistance (Rf) and measure the variation in t . (Same for RES1 and RES2)

140

RES1 RES2

C = 0.22 µF

100

C = 0.1 µF

C = 0.047 µF

60 100 140 180 220 260

Rf resistance (k )Ω

Page 15

800

HA16113FPJ

tr characteristic (for both RES1 and RES2)

tr (µs)

600

12 V

CRES

RES2

NMI

Measure with oscilloscope

400

200

60 100 140 180 220 260

Rf resistance (k )

t characteristic (for both RES1 and RES2)

RES

Ω

600

12 V

500

CRES

400

RES2

NMI

Measure with oscilloscope

CRES = 740 pF

CRES = 1500 pF

CRES = 3300 pF

CRES = 740 pF

t (µs)

RES

300

200

100

60 100 140 180 220 260

Rf resistance (k )Ω

CRES = 1500 pF

CRES = 3300 pF

Page 16

HA16113FPJ

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

SW2

SW1

HA16113FPJ

IGN

Wiring impedance

Figure 1 Typical Circuit

Vcont

RES

Relay or other load

Vout

RES

+ –

GND

Figure 2 RES Comparator

Page 17

Package Dimensions

HA16113FPJ

Unit: mm

15.8

16.2 Max

1.12 Max

1.27

*0.40 ± 0.08

0.38 ± 0.06

*Dimension including the plating thickness

Base material dimension

0.20

0.15

8.4

0.20 ± 0.10

2.50 Max

11.8 ± 0.3

0.15 ± 0.04

*0.17 ± 0.05

Hitachi Code JEDEC EIAJ

(reference value)

Mass

1.7

0° – 8°

1.0 ± 0.2

FP-24D Conforms —

0.6 g

Page 18

HA16113FPJ

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 failsafes, 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.

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