Datasheet HA16117FPCJ, HA16117FPC, HA16117FPBJ, HA16117FPB, HA16117FPAJ Datasheet (HIT)

HA16117F Series

CMOS Watchdog Timer

Description

The HA16117F Series of ICs make a micro-processor (MPU) system fail-safe by monitoring its power supply to detect voltage drops, and monitoring a P-RUN (program running) pulse to detect system crashes. Also referred to as watchdog timers, these devices are essential in systems that aim for high levels of crash protection. Fabricated by a CMOS process, they consume little power and are ideally suited for batteryoperated systems.

These ICs are available in versions for industrial and communications equipment and automotive applications, as well as for consumer products.

Functions

• Power-on reset  Sends a RES signal to the MPU for a fixed time at power-on

• Watchdog timer (WDT)  Monitors a P-RUN signal from the MPU and sends the MPU a RES signal if P-RUN departs from a

set frequency range

• Auto-reset  Outputs RES signals to the MPU at clocked intervals while P-RUN remains abnormal

• Supply voltage supervision  Outputs a low RES signal if the supply voltage (same as the MPU's VCC) falls below a low threshold

level (VTL). The threshold differs for different ICs in the series, allowing designers to choose an IC matching system requirements (see ordering information)

Features

• Low power consumption : Operating (ACC pin low) = 0.5 mW (Typ)

: Standby (ACC pin high) = 0.2 mW (Typ)

• Watchdog timer on/off control by ACC input signal

• Independent auto-reset high and low times (tRH and tRL)

• Watchdog monitoring by frequency filtering (independent of duty cycle)

• High-precision low voltage detection (±2%)

• Space- and weight-saving 8-pin SOP package

HA16117F Series

Ordering Information

The HA16117F Series includes three ICs with different low threshold levels (VTL).

Type No. Low Threshold Voltage (VTL)

HA16117FPA/FPAJ 4.4 V Typ HA16117FPB/FPBJ 4.2 V Typ HA16117FPC/FPCJ 4.0 V Typ

Pin Arrangement

V

CC

P-RUN

C

F

R

8

1

7

2

6

3

5

4

(Top view)

Tadj ACC GND RES

Pin Description

Pin No. Symbol Function

1V

CC

2 P-RUN Watchdog timer (WDT) input 3C

4C

F

R

5 RES Reset signal output from WDT and voltage supervision circuits 6 GND Ground 7 ACC WDT on/off control input (on when ACC is low) 8 Tadj * For adjusting tRH and t

Note: The low-voltage threshold cannot be modified by changing the external resistors connected to the

Tadj pin.

Power supply voltage input

Connected capacitor CF determines WDT filter characteristic (normal frequency range)

Connected capacitor CR determines tON for power-on reset and t and t

for auto-reset

RL

(divide VCC to get the adjustment voltage)

OFF

, tRH,

2

Block Diagram

5 V

6

0.1 µ

4

1

V

CC

2.52 (117FA)

2.36 (117FB)

GND

Power-on and auto-reset circuit

C

R

2.20 (117FC)

1

I2 adjustment

(*I

< I2)

1

Low voltage detector

−

+

≈1.25 V

COMP.

SW2

I

HA16117F Series

RES

I

1

−

+

COMP.

2

SW1

5

to Microcomputer

R

1

510 k R

2

750 k

Mode

Operating Standby High

Note: The power-on reset circuit operates in both operating and standby modes.

Tadj

8

P-RUN

1/2 frequency

2

divider

PULSE from I/O port

ACC Voltage Function

Low Low voltage detection and WDT

(SW1 and SW2 are active high)

Watchdog timer

Watchdog filter (f-duty converter)

W.D out duty (%)

W.D in

duty 50%

Low voltage detection

n

Normal range

f

/2 fH/2

L

W.D in frequency (Hz)

C

F

3 7

0.01 µ

W.D out

duty n%

ACC

Operating: "Low" Standby: "High"

The HA16117F consists of a low voltage detector, power-on and auto-reset circuit, and watchdog timer.

Low Voltage Detector

Uses a reference voltage source (≈ 1.25 V) and high-precision comparator to detect drops in the supply voltage.

Power-On and Auto-Reset Circuit

Generates the RES waveform, using a multivibrator consisting of a current source I1 that charges the external capacitor CR, a current source I2 that discharges CR, and a comparator.

3

HA16117F Series

Watchdog Timer

Reshapes the P-RUN signal (programming-running pulse) from the MPU to obtain a 50% duty cycle, then converts frequency to duty cycle in the watchdog filter (WD filter).

The watchdog filter is a bandpass filter. The duty cycle of the filter output is highest in the normal frequency range of P-RUN.

The watchdog filter output controls I2 in the multivibrator, the higher the duty cycle of the watchdog filter output, the shorter the time during which I2 discharges CR. If the duty cycle is high enough then CR is held at a high potential, preventing the multivibrator from firing, and the RES output remains high.

Absolute Maximum Ratings (Ta = 25°C)

Ratings

Item Symbol HA16117FPA/FPB/FPC HA16117FPAJ/FPBJ/FPCJ Unit

Power supply voltage V P-RUN input voltage V ACC input voltage V RES output current I Permissible dissipation *

1

CC

P

ACC

RES

P

T

Operating temperature range Topr –30 to +85 –40 to +85 °C Storage temperature Tstg –55 to +125 –55 to +125 °C

Note: 1. This is the value when mounted on a glass epoxy substrate with 30% wiring density, up to an

ambient temperature of 83°C. Above that temperature, derate by 7.14 mW/°C.

–0.3 to +14 –0.3 to +14 V V

CC

V

CC

V 14 14 V 10 10 mA 300 300 mW

40mm

(mW)

T

400

60 80

83°C

85°C

100

300 200 100

0

−30 −20 0 20 40

Ambient operating temperature range Ta (°C)

Permissible dissipation P

−7.14 mW/°C

(30% wiring density)

Substrate

0.8 mm ceramic or

1.5 mm epoxy

4

HA16117F Series

Electrical Characteristics

(VCC = 5 V, Ta = 25°C, CF = 0.01 µF, CR = 0.1 µF, R1 = 510 kΩ, R2 = 750 kΩ)

Item Symbol Min Typ Max Unit Test Conditions

General Operating supply current I

Standby supply current I

Low voltage detector

Low voltage threshold level

HA16117FPA/FPAJ V

HA16117FPB/FPBJ 4.1 4.2 4.3 V HA16117FPC/FPCJ 3.9 4.0 4.1 V

Hysteresis width V

ACC Low input voltage V

High input voltage V P-RUN Low input voltage V input High input voltage V WDT Power-on reset time t

Reset-clock off time t

Reset low time t

Reset high time t

Low setup time t

High setup time t RES RES low voltage V output RES high voltage V

Reset function starting voltage V Constant

Constant range of R1 and R

2

range Operating supply voltage range V

Note: 1. Reset-clock off time t

is provided a shown in the under figure.

OFF

CC1

I

CC2

STBY

TL

HYS

IL1

IH1

IL2

IH2

ON

OFF

RL

RH

SL

SH

OL

OH

RES

K 0.55 0.6 0.8 — K =R2 / (R1 + R2)

CCRNG

— 100 — µAV

— 200 600 µAV

— 43 100 µAV

4.3 4.4 4.5 V

50 100 150 mV — — 0.8 V

2.0 — — V — — 0.8 V

2.0 — — V 24 40 56 ms

1

*

78 130 182 ms 12 20 28 ms 36 60 84 ms P-RUN pin = 0 V 1——ms ——1 ms — — 0.4 V IOL = 1 mA —VCC— V Open — 0.8 1.4 V

V

TL

— 6.0 V

= 0 V,

ACC

f

= 100 Hz

P-RUN

= 0 V,

ACC

f

= 20 kHz

P-RUN

= 12 V

ACC

When VCC drops

P-RUN

RES

f = 500 Hz, Duty = 50%

t

OFF

5

HA16117F Series

Timing Waveforms and Functional Description

V

CC

V

TL

P-RUN

Watchdog function on

RES

(V

= "Low")

ACC

Watchdog function off

RES

(V

= "High")

ACC

t

ON

t

ON

Crash

t

RH

t

OFF

t

RL

t

ON

t

ON

Figure 1 Timing Waveforms

Watchdog On/Off Function

A feature of the HA16117F is that watchdog supervision can be switched on and off. When the watchdog function is switched on, both the supply voltage and

P-RUN input are monitored to detect abnormal conditions. When the watchdog function is switched off (standby mode), only the supply voltage is monitored. Watchdog supervision is switched on and off by the input at the ACC pin (pin 7): Supervision is on when ACC is low, and off when ACC is high.

Many MPUs have a standby mode in which the CPU stops running but memory contents are retained. In standby mode, program execution halts and I/O ports go to the high-impedance state, so there is no need for the watchdog timer to supervise pulse output from an I/O port to detect abnormal conditions. Power can be saved by placing both the MPU and HA16117F in standby mode at the same time. The HA16117F is designed to draw a typical standby current I

of only 43 µA Typ when the watchdog function is switched

STBY

off.

ACC Pin (pin 7) and RES Output

When the MPU returns from standby mode to normal operation it generally takes 10 to 200 ms for the clock oscillator in the MPU to stabilize. The RES signal is not output during this setup time. After the setup time (tSL) has elapsed, RES is output if the P-RUN signal from the MPU is still abnormal.

ACC pin

RES (due to MPU crash)

t

SH

Adjust according to MPU’s setup time

t

SL

Figure 2 ACC Pin and RES Output

6

HA16117F Series

Internal Operation and Usage Notes

Figure 3 shows an equivalent circuit of the watchdog timer block with a VCC pin level of 5 V and ACC pin level of 0 V, and the following pages show internal operation timing charts for different P-RUN frequencies. (Descriptions apply to conditions CF = 0.01 µF, CR = 0.1 µF, R2/(R1 + R2) = 0.6.)

Operation

The power-on and auto-reset circuit is a multivibrator with timing controlled by CR charge current I1 and discharge current I2. As I1 : I2 ≈ 3 : 1 (Typ design value), when the (WD) (watchdog filter circuit output) on-duty is 25% or above, the CR pin potential does not fall below 1.6 V. Therefore, (C) in the figure below is fixed low, and RES is not output. The (WD) on-duty varies according to the P-RUN frequency. If the frequency is lower or higher than the design value, the (WD) on-duty decreases, and at 25% or below, RES is output. Refer to the timing charts on the following pages for an explanation of the operation of the watchdog filter.

Usage Notes

• When the P-RUN frequency reaches 20 kHz or above, t

is short (see the timing charts on the

OFF

following pages). This must be borne in mind in the design stage.

• If the P-RUN frequency fluctuates, RES may also be output within the normal detection set frequency

(see the timing charts on the following pages).

• Detection frequencies fH and fL described in the Data Book are Typ values, and a certain amount of

dispersion can be expected. A margin of ±30% or more should be allowed for in the design.

0.1 µ

B

C

R

I

1

8 µ typ

3.2 V

1.6 V

I

2

10.7 µ typ

Power-on and auto-reset circuitWatchdog filter circuit

Low voltage detection block

C

−

+

RES

I

w

0.8 µ typ

C

F

0.01 µ

P-RUN

A

3.6 V

Q

QD

φ

Q

1/2 frequency divider

0.9 V

Q

VCC (5 V)

−

+

−

+

WD

Figure 3 Watchdog Timer Evaliation Circuit

7

HA16117F Series

1. When P-RUN signal is not input

P-RUN

C

WD

The watchdog filter circuit output (WD) is fixed low, so the RES signal is output as shown in the figure below in accordance with power-on and auto-reset circuit C

H

L

H

Q

L

H

Q

L

H

A

L

5 V

3.6 V

F

0.9 V 0 V

H

L

5 V

charge/discharge.

R

3.2 V

C

R

1.6 V

0 V

H

B

L

H

C

L

H

RES

L

20 ms

60 ms

8

2. With a low-frequency P-RUN signal ( 13 Hz to 26 Hz)

HA16117F Series

P-RUN

C

WD

When f duty is 25% or above, multivibrator (power-on and auto-reset circuit) oscillation stops. As a

is 13 Hz to 26 Hz, the WD duty (D = 100 × t2/2T) is 25% to 50%. When the WD

P-RUN

result, the RES signal is fixed high.

40 ms (25 Hz)

H

L

H

Q

L

H

2T

Q

L

H

A

L

5 V

3.6 V

F

0.9 V 0 V

5 µs

t

1

H

t

L

2

33 ms

5 V

C

RES

3.2 V

R

1.6 V

0 V

H

B

L

H

C

L

H

60 ms

L

20 ms

9

HA16117F Series

3. With a 10 kHz P-RUN signal

P-RUN

C

WD

When f 25%, the multivibrator (power-on and auto-reset circuit) does not oscillate. The RES signal remains high.

H

L H

Q

L H

Q

L H

A

L

5 V

3.6 V

F

0.9 V

0 V

H

L

5 V

is 10 kHz, the WD duty (D = 100 × (T − t2)/2T) is 48%. As the duty is above

P-RUN

100 µs (10 kHz)

2T

t

µs

1 5

10

C

RES

3.2 V

R

1.6 V

0 V

H

B

L H

C

L H

L

4. With a 150 kHz P-RUN signal

HA16117F Series

P-RUN

C

WD

When f Therefore, C

is 100 kHz or above, the WD duty (D = 100 × (T − t2)/2T) is 25% or below.

P-RUN

is discharged, and the RES signal is output at the instant that the pin potential

R

falls to the comparator circuit threshold value (V

6.6 µs (150 kHz)

H

L H

Q

L H

2T

Q

L H

A

L

5 V

3.6 V

F

t

5 µs

1

0.9 V 0 V

H

L

5 V

= 1.6 V).

TL

C

RES

3.2 V

R

1.6 V

0 V

H

B

L H

C

L H

L

11

HA16117F Series

5. t

when P-RUN signal 90 kHz

OFF

P-RUN

C

WD

When the P-RUN frequency is high, even though within specification, the C falls. If the P-RUN frequency falls sharply at this time, t

may be short.

OFF

pin potential

R

With values of CF = 0.01 µF and CR = 0.1 µF, the CR pin potential will not fall as long as the P-RUN frequency is 20 kHz or below.

≈ 90 kHz

f

H

P_RUN

50 ms

L H

Q

L H

Q

L H

A

L

5 V

3.6 V

F

0.9 V 0 V

H

L

5 V

12

C

RES

3.2 V

R

≈ 2.3 V

1.6 V

0 V

H

B

L H

C

L H

L

t

OFF

26 ms

6. When P-RUN frequency fluctuates (1)

If there is a double-pulse in P-RUN, the WD filter duty will be decreased and RES will be output, as shown in the figure below, for example. In this case, the condition for non-output of the RES signal is a value of 3 or less for the ratio of P-RUN pulse interval minimum value to

P-RUN

C

WD

maximum value (when f ratio is 3.

H

L H

Q

L H

Q

L H

A

L

5 V

3.6 V

F

0.9 V 0 V

H

L

5 V

P-RUN

2 ms

28 ms

HA16117F Series

≤ 20 kHz). This is because the CR pin charge/discharge current

C

RES

3.2 V

R

1.6 V

0 V

H

B

L H

C

L H

L

20 ms

13

HA16117F Series

7. When P-RUN frequency fluctuates (2)

If there is a double-pulse in P-RUN, RES will not be output as long as the ratio of P-RUN pulse interval minimum value to maximum value is 3 or less. The timing chart for a P-RUN minimum interval of 8 ms and maximum interval of 22 ms is shown below.

P-RUN

C

WD

C

H

L

H

Q

L

H

Q

L

H

A

L

5 V

3.6 V

F

0.9 V 0 V

H

L

5 V

3.2 V

R

1.6 V

8 ms

22 ms

14

0 V

H

B

L

H

C

L

H

RES

L

8. Summary of cases where P-RUN frequency fluctuates

If there is a double-pulse in P-RUN, RES may be output if the double-pulse has multiple frequency components. If the P-RUN frequency fluctuates, refer to the following when making the P-RUN setting.

• P-RUN normal detection region, duty dependency 1 M

100 k

(Hz)

10 k

P-RUN

HA16117F Series

Note: 1

When f t

is frequency-dependent,

OFF

so care is required when making the P-RUN setting (see figure below).

P-RUN

≥ 20 kHz,

1 k

100

P-RUN frequency f

10

1

050

Note: 2. This is the region when f

If f

fluctuates within the normal detection region, the following applies:

P-RUN

Normal detection is performed when the condition f

• f

dependency of VCR, t

P-RUN

5

4

(V)

CR

3

Normal detection region*

P-RUN pulse duty D (%)

is constant.

P-RUN

, M

OFF

2

100

P-RUN H/fP-RUN L

< M is satisfied.

t (s)

OFF

3

100 m

M

2

50 m

2

Multivibrator threshold voltage (1.6 V)

1

CR voltage V

0

1 k 3 k 10 k

P-RUN frequency (Hz)

0

1

30 k 50 k 70 k 100 k7 k5 k

15

HA16117F Series

Setting of RES Timing and Watchdog Frequency Range

Different MPUs have different RES timing requirements. The minimum reset time (tON) required at poweron (rise of VCC) is 20 ms for some MPUs and 100 ms for others.

RES timing waveform parameters must be selected according to the MPU. With the HA16117F the timing of the RES output and the watchdog frequency range can both be set by external constants (CF, CR, and K).

Parameters

Item Symbol CR (pin 4) CF (pin 3) K (pin 8) *

Power-on reset time t Reset-clock off time t Reset low time t Reset high time t Watchdog frequency high f Watchdog frequency low f

ON

OFF

RL

RH

H

L

●

●▲ *

2

●

●●

●●●

Notes: 1. K = R2 / (R1 + R2)

2. Variability of t

3.3 (MΩ) × C

increases with increasing CF. The variability ∆t

OFF

(µF), so CF ≤ 0.01 (µF) is recommended.

F

is approximately

OFF

3. External constants should be selected with reference to the formulas in tables 1 and 2.

1

Table 1 Calculation of RES Output Timing

Item Formula Notes

(ms) 400 (Ω) × CR (µF) tON and t

t

ON

t

(ms) 1.99 × tRH (ms)

OFF

can be set independently

OFF

tRL (ms) 0.5 × tON (ms) tRL and tRH can be set independently tRH (ms)

K × 31 (µA) − 15.8 (µA)

tSL (ms) ≈ t

OFF

(ms)

1.6 (V) × C

(µF) × 10

R

3

Table 2 Calculation of Watchdog Frequency Range

Item Formula

(MHz)

f

H

fL (Hz)

500 (Ω) × C

1.7 (MΩ) × C

Whichever is larger

1

(µF)

F

1

(µF)

F

(ms) − tRL (ms)

t

RH

×

t

(ms) + tRL (ms)

RH

(ms)

t

×× 10

RL

t

(ms) + tRL (ms)

RH

or

1

t

(ms)

OFF

3

16

HA16117F Series

Selection of External Constants

If the reset duration necessary for the MPU to operate reliably at power-on is known, there is a simple procedure for selecting external constants, starting from the power-on reset time (tON).

External

START

Set power-on reset time t

ON

Set reset high time t

RH

Select external constant C

F

Check watchdog frequency range fH and f

L

constant values

• Decide reset low time (tRL)

• Select external constant C

R

Application Example

Battery

5 V

regulator

0.01 µF

• Decide reset-clock off time (t

OFF

)

• Select external constants R1 and R

2

Figure 4 Procedure for Selecting External Constants

SW

R

1

510 kΩ

C

F

0.1 µF

V

CC

P-RUN

HA16117F

C

F

C

R

Tadj

ACC

GND

RES

R

2

750 kΩ

V

CC

Microprocessor

system

PORT GND

RES

17

HA16117F Series

Operating Characteristics and Test Circuits

V

CC

RES

P-RUN

RES

5 V V

0 V

5 V

0 V

5 V

0 V 5 V

0 V

510 k

TL

t

ON

5V 0V

0.01 µ 0.1 µ

V

CC

Tadj P-RUN ACC C C

GND

F

RES

R

750 k

Oscilloscope

50 ms/div time

Circuit for measuring t

ON

Power-on reset time (tON)

SW,OFF

t

OFF

5V 0V f = 500Hz duty 50%

0.01 µ 0.1 µ

50‰

5 V

V

CC

Tadj P-RUN ACC C C

GND

F

RES

R

510 k

750 k

Oscilloscope

50 ms/div time

Reset-clock off time (t

OFF

)

Circuit for measuring t

OFF

18

5 V

0 V

RES and C

t

RH

RES

C

R

t

RL

20 ms/div time

waveforms at detect abnormal conditions

R

5V

V P-RUN ACC C C

CC

F

R

Tadj

GND

RES

0.01 µ 0.1 µ

Oscilloscope

Circuit for measuring RES and CR waveforms

510 k

750 k

Low Voltage Threshold vs. Ambient Temperature

5.0 HA16117FA

V -Ta

TL

(V)

TL

4.5

(−50ppm/°C)

4.0

Low voltage threshold V

3.5

−30 0 50 85 Ambient temperature Ta (°C)

V

CC

0.01 µ 0.1 µ

CC

Tadj

V P-RUN ACC C C

GND

F

RES

R

Test circuit

HA16117F Series

12 V

510 k

750 k

5 V

regulator

Oscilloscope

Threshold Hysteresis Width vs. Ambient Temperature

150

HA16117FA V -Ta

HYS

(mV)

HYS

100

V

50

Threshold hysteresis width V

0

−30 0 50 85 Ambient temperature Ta (°C)

V

CC

P-RUN ACC C C

0.01 0.1

CC

F

R

Test circuit

Tadj

GND

RES

Oscilloscope

12V

510k

750k

5 V

regulator

19

HA16117F Series

500 µ

Ta = 25°C

(A)

CC

100 µ

Operating supply current I

10 µ

100 1 k 10 k 20 k

Operating Supply Current vs. P-RUN Input Frequency

P-RUN input frequency f

P-RUN

(Hz)

20

Pulse genelator

VCC pin

5 V

0 V to 5 V

0.01 µ 0.1 µ

A

I

CC

V

CC

P-RUN ACC C

F

C

R

Test circuit

Tadj

GND

RES

510 k

750 k

Standby Supply Current vs. Supply Voltage

200 µ

HA16117F Series

Ta = 25°C

(A)

STBY

100 µ

Standby supply current I

0

Supply Voltage VCC (V)

0.01 µ 0.1 µ

57

Supply Current vs. Ambient Temperature

300 µ

A

I

STBY

V

CC

P-RUN ACC C

F

C

R

Test circuit

Tadj

GND

RES

510 k

750 k

V

12 V

V

CC

(A)

CC

, I

STBY

200 µ

f = 20 kHz I

f = 100 Hz I

100 µ

Supply current I

I

STBY

0

−30 0 50 85 Ambient temperature Ta (°C)

CC

21

HA16117F Series

RES Low Voltage vs. RES pin Sink Current

0.4

0.3

(V)

OL

5 V

CC

Tadj

V P-RUN ACC

51 k

75 k

0.2

≈ 160Ω)

ON

(R

0.1

RES low voltage V

0 0.5 m 1 m 1.5 m

RES pin sink current I

OL

(V)

OL

RES low voltage V

C

F

C

R

0.01 µ

Test circuit

(A)

RES Low Voltage vs. Ambient Temperature

0.3 IOL = 1mA

0.2

0.1

GND

RES

V

I

o sink

22

0

−30 0 50 85 Ambient temperature Ta (°C)

RES High Voltage vs. RES pin Source Current

5

Ta = 25°C

(V)

OH

5V

HA16117F Series

CC

Tadj

V P-RUN ACC

51 k

75 k

4

RES high voltage V

3

0

RES pin source current I

o source

(A)

500 µ

0.01 µ 0.1 µ

C

F

C

R

Test circuit

GND

RES

V

I

o sink

23

HA16117F Series

Power-on Reset Time vs. C

R

1

Ta = 25°C

100 m

(sec)

ON

10 m

Power-on reset time t

1 m

0.01 µ 0.1 µ 1.0 µ External capacitance C

RES Output Timing vs. C

R

1

Ta = 25°C

Capacitance

(F)

R

Capacitance

5V

0.01 µ C

V

CC

P-RUN ACC C

F

C

R

V

CC

RES

Test circuit

GND

RES

t

ON

Tadj

510 k

750 k

Oscilloscope

(sec)

100 m

RL

, t

RH

t

RH

t

RL

10 m

RES output timing t

1 m

0.01 µ 0.1 µ 1.0 µ External capacitance C

R

(F)

5 V

0.01 µ C

V

CC

P-RUN ACC C

F

C

R

Test circuit

RES

Tadj

GND

RES

5 V 0 V

510 k

750 k

Oscilloscope

t

RH

24

HA16117F Series

High Setup Time vs. C

1000 µ

Ta = 25°C

100 µ

(sec)

SH

10 µ

High setup time t

1 µ

0.01 µ External Capacitance CR (F)

Capacitance

R

0.1 µ 1.0 µ

0.01 µ

5 V

C

R

V

CC

Tadj

P-RUN ACC C C

GND

F

RES

R

Test circuit

510 k

750 k

RES

Oscilloscope

0V

t

SH

Low Setup Time vs. C

Capacitance

R

10

Ta = 25°C

1

(sec)

SL

100 m

Low setup time t

10 m

0.01 µ 0.1 µ 1.0 µ External Capacitance CR (F)

5 V

0.01 µ C

V

CC

P-RUN ACC C

F

C

R

Test circuit

Tadj

GND

RES

Oscilloscope

15 V

0 V

RES

510 k

750 k

t

SL

25

HA16117F Series

Reset High Time vs. K (Tadj Constant)

100 m

(sec)

RH

5 V

CC

Tadj

V P-RUN ACC

R

1

R

2

Reset high time t

10 m

0.56 0.6 0.7 0.8

Tadj constant K

Duty-cycle dependence of

P-RUN normal frequency range

1 M

MPU system abnormal

100 k

Abnormal if duty cycle is 0%

10 k

(Hz)

P-RUN

MPU system normal

1 k

Abnormal if duty

100

cycle is 100%

0.01 µ 0.1 µ

Pulse

generator

5 V 0 V

0.01 µ 0.1 µ

5 V

C C

GND

F

RES

R

Test circuit

V

CC

Tadj

P-RUN ACC C C

GND

F

RES

R

Oscilloscope

K =

510 R

750 R

Oscilloscope

R

2

R

+ R

1

2

26

10

P-RUN input frequency f

MPU system abnormal

1

0

50 100

P-RUN input pulse duty cycle (%)

Test circuit

Notes: 1.2.Normal detection is assumed when RES is not output.

The figure at left is for a constant P-RUN frequency. See "8. Summary of cases where P-RUN frequency fluctuates" for cases where the frequency fluctuates.

P-RUN Input Frequency vs. K (Tadj constant)

1 M

Ta = 25°C

K=

R1 + R

R

2

100 k

(Hz)

10 k

P-RUN

1 k

MPU system normal

100

P-RUN input frequency f

10

Pulse

generator

5V 0V

duty 50%

0.01 µ

5 V

0.1 µ

Test circuit

HA16117F Series

R V P-RUN ACC C C

CC

F

R

Tadj

GND

RES

Oscilloscope

K =

R

1

R

2

R

2

+ R

1

2

MPU system abnormal

1

0.55

0.6

0.7 0.8

Tadj constant K

P-RUN High Threshold Frequency vs. C

10 M

Ta = 25°C

(Hz)

H

MPU system abnormal

1 M

100 k

P-RUN high threshold frequency f

MPU system normal

10 k

500 p

1000 p 0.01 µ 0.03 µ

External capacitance CF (F)

Notes: 1.2.Normal detection is assumed when RES is not output.

Capacitance

F

Notes: 1.2.Normal detection is assumed when RES is not output.

The figure at left is for a constant P-RUN frequency.

CC

F

R

Tadj

GND

RES

5 V

Pulse

V P-RUN ACC C C

generator

C

F

C

R

Oscilloscope

0 V to 5 V duty 50%

Test circuit

The figure at left is for a constant P-RUN frequency.

510 k

750 k

27

HA16117F Series

P-RUN Low Threshold Frequency vs. CF Capacitance

1 k

Ta = 25°C

(Hz)

L

100

Normal

CR = 0.01 µF

CR = 0.1 µF

5 V

Pulse

generator

V

CC

Tadj

P-RUN ACC C C

GND

F

RES

R

51 k

75 k

Abnormal

10

P-RUN low threshold frequency f

CR = 1.0 µF

500 p11000 p 0.01 µ 0.03 µ

External Capacitance CF (F)

P-RUN Input Frequency vs. Ambient Temperature

1 M

P-RUN abnormal

100 k

(Hz)

10 k

P-RUN

1 k

f

H

P-RUN normal

C

F

C

R

Oscilloscope

Test circuit

Notes: 1.2.Normal detection is assumed when RES is not output.

The figure at left is for a constant P-RUN frequency.

510 k

750 k

5 V

duty 50%

V

CC

Tadj

P-RUN ACC C C

GND

F

RES

R

Pulse

generator

Oscilloscope

28

100

f

L

P-RUN input frequency f

10

P-RUN abnormal

1

−30

0

Ambient temperature Ta (°C)

50 85

0.01 µ

0.1 µ

Test circuit

Notes: 1.2.Normal detection is assumed when RES is not output.

The figure at left is for a constant P-RUN frequency.

HA16117F Series

Power-on Reset Time vs. Ambient Temperature

100

(ms)

ON

50

t

ON

Power-on reset time t

−3000 50 100 Ambient temperature Ta (°C)

Power-on Reset Time vs. Ambient Temperature

and tRL vs. Ambient Temperature

t

RH

100

70

t

RH

50

(ms)

RL

5 V

0.01 µ C

R

RES

5 V

0.01 µ 0.1 µ

V

CC

P-RUN ACC C

F

C

R

V

CC

Test circuit

V

CC

P-RUN ACC C

F

C

R

GND

RES

t

ON

GND

RES

Tadj

510 k

750 k

Oscilloscope

51 k

75 k

and t

RH

t

30

t

RL

0

−35 0 50 85 Ambient temperature Ta (°C)

5 V 0 V

Test circuit

Oscilloscope

t

RH

t

RL

29

HA16117F Series

Package Dimensions

1.27

4.85

5.25 Max

8

1

0.75 Max

Unit: mm

5

4.4

4

+ 0.25

6.50

– 0.15

2.03 Max *0.22 ± 0.05

1.05

0.20 ± 0.04 0° – 8°

+ 0.25

0.60

– 0.18

*0.42 ± 0.08

0.40 ± 0.06

*Dimension including the plating thickness

Base material dimension

0.10 ± 0.10

0.12

0.15

M

Hitachi Code JEDEC EIAJ Mass

(reference value)

FP-8D — Conforms

0.10 g

30

HA16117F Series

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.

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

URL NorthAmerica : http:semiconductor.hitachi.com/

For further information write to:

Hitachi Semiconductor (America) Inc. 179 East Tasman Drive, San Jose,CA 95134 Tel: <1> (408) 433-1990 Fax: <1>(408) 433-0223

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Hitachi Europe GmbH Electronic components Group Dornacher Straβe 3 D-85622 Feldkirchen, Munich Germany Tel: <49> (89) 9 9180-0 Fax: <49> (89) 9 29 30 00

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 Asia Pte. Ltd. 16 Collyer Quay #20-00 Hitachi Tower Singapore 049318 Tel: 535-2100 Fax: 535-1533

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

31