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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. HA16117FPA/FPAJ HA16117FPB/FPBJ HA16117FPC/FPCJ Low Threshold Voltage (VTL) 4.4 V Typ 4.2 V Typ 4.0 V Typ
Pin Arrangement
VCC P-RUN CF CR 1 2 3 4 8 7 6 5 Tadj ACC GND RES
(Top view)
Pin Description
Pin No. 1 2 3 4 5 6 7 8 Symbol VCC P-RUN CF CR RES GND ACC Tadj * Function Power supply voltage input Watchdog timer (WDT) input Connected capacitor C F determines WDT filter characteristic (normal frequency range) Connected capacitor C R determines tON for power-on reset and tOFF, t RH, and tRL for auto-reset Reset signal output from WDT and voltage supervision circuits Ground WDT on/off control input (on when ACC is low) For adjusting tRH and tOFF (divide V CC to get the adjustment voltage)
Note: The low-voltage threshold cannot be modified by changing the external resistors connected to the Tadj pin.
2
HA16117F Series
Block Diagram
5V GND
VCC
1 2.52 (117FA) 2.36 (117FB) 2.20 (117FC) Low voltage detector
- +
6
1 GND
1.25 V
COMP. RES
0.1
4
CR
Power-on and auto-reset circuit (*I1 < I2) SW2 I2 adjustment I2
I1
- +
5 to Microcomputer
COMP. SW1
R1 510 k 8 R2 750 k
Tadj
(SW1 and SW2 are active high) Watchdog timer Watchdog filter (f-duty converter) W.D out duty (%) Normal range W.D out fL/2 fH/2 duty n%
P-RUN 1/2 frequency W.D in 2 divider duty 50%
n
W.D in frequency (Hz) 3 PULSE from I/O port Mode Operating Standby ACC Voltage Low High Function Low voltage detection and WDT Low voltage detection CF 0.01 7 ACC Operating: "Low" Standby: "High"
Note: The power-on reset circuit operates in both operating and standby modes.
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 C R, a current source I 2 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 = 25C)
Ratings Item Power supply voltage P-RUN input voltage ACC input voltage RES output current Permissible dissipation *
1
Symbol VCC VP VACC I RES PT Topr Tstg
HA16117FPA/FPB/FPC -0.3 to +14 VCC 14 10 300 -30 to +85 -55 to +125
HA16117FPAJ/FPBJ/FPCJ -0.3 to +14 VCC 14 10 300 -40 to +85 -55 to +125
Unit V V V mA mW C C
Operating temperature range Storage temperature Note:
1. This is the value when mounted on a glass epoxy substrate with 30% wiring density, up to an ambient temperature of 83C. Above that temperature, derate by 7.14 mW/C.
40mm
Substrate
Permissible dissipation PT (mW)
0.8 mm ceramic or 1.5 mm epoxy 400 300 200 100 85C 0 -30 -20 0 20 40 60 80 100 Ambient operating temperature range Ta (C) 83C -7.14 mW/C (30% wiring density)
4
HA16117F Series
Electrical Characteristics (VCC = 5 V, Ta = 25C, CF = 0.01 F, CR = 0.1 F, R1 = 510 k, R2 = 750 k)
Item General Operating supply current Symbol ICC1 ICC2 Standby supply current Low voltage detector Low voltage threshold level HA16117FPA/FPAJ ISTBY VTL Min -- -- -- 4.3 Typ 100 200 43 4.4 Max -- 600 100 4.5 Unit A A A V Test Conditions VACC = 0 V, fP-RUN = 100 Hz VACC = 0 V, fP-RUN = 20 kHz VACC = 12 V When VCC drops
HA16117FPB/FPBJ HA16117FPC/FPCJ Hysteresis width ACC Low input voltage High input voltage P-RUN input WDT Low input voltage High input voltage Power-on reset time Reset-clock off time Reset low time Reset high time Low setup time High setup time RES output RES low voltage RES high voltage Reset function starting voltage Constant range Constant range of R 1 and R 2 VHYS VIL1 VIH1 VIL2 VIH2 tON tOFF * tRL tRH tSL tSH VOL VOH VRES K VCCRNG
1
4.1 3.9 50 -- 2.0 -- 2.0 24 78 12 36 1 -- -- -- -- 0.55 VTL
4.2 4.0 100 -- -- -- -- 40 130 20 60 -- -- -- VCC 0.8 0.6 --
4.3 4.1 150 0.8 -- 0.8 -- 56 182 28 84 -- 1 0.4 -- 1.4 0.8 6.0
V V mV V V V V ms ms ms ms ms ms V V V -- V K =R2 / (R1 + R2) IOL = 1 mA Open P-RUN pin = 0 V
Operating supply voltage range
Note:
1. Reset-clock off time tOFF is provided a shown in the under figure.
f = 500 Hz, Duty = 50%
P-RUN
RES
tOFF
5
HA16117F Series
Timing Waveforms and Functional Description
VTL VCC
P-RUN Crash t RH Watchdog function on RES (VACC = "Low")
t ON
t OFF
t ON
t RL Watchdog function off RES (VACC = "High") 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 STBY of only 43 A Typ when the watchdog function is switched 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.
Adjust according to MPU's setup time t SH RES (due to MPU crash) t SL
ACC pin
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 F, CR = 0.1 F, R2/(R1 + R2) = 0.6.) Operation The power-on and auto-reset circuit is a multivibrator with timing controlled by CR charge current I 1 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 C R 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, tOFF is short (see the timing charts on the 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 A VCC (5 V) CR I1 8 typ 3.6 V
- + - +
Low voltage detection block
Iw 0.8 typ CF Q 0.01 P-RUN DQ
C
RES
0.9 V
- +
3.2 V 1.6 V B I2 10.7 typ
WD
Q Q 1/2 frequency divider Watchdog filter circuit Power-on and auto-reset circuit
Figure 3 Watchdog Timer Evaliation Circuit
7
HA16117F Series
1. When P-RUN signal is not input
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 CR charge/discharge.
H P-RUN L H Q L H Q L H A L 5V 3.6 V CF 0.9 V 0V H WD L 5V
3.2 V CR 1.6 V
0V H B L H C L H RES L 20 ms 60 ms
8
HA16117F Series
2. With a low-frequency P-RUN signal ( 13 Hz to 26 Hz)
When fP-RUN is 13 Hz to 26 Hz, the WD duty (D = 100 x t2/2T) is 25% to 50%. When the WD duty is 25% or above, multivibrator (power-on and auto-reset circuit) oscillation stops. As a result, the RES signal is fixed high.
40 ms (25 Hz) H P-RUN L H Q L H Q L H A L 5V 3.6 V CF 0.9 V 0V H WD L 5V t2 33 ms t1 5 s 2T
3.2 V CR 1.6 V
0V H B L H C L H RES L 20 ms 60 ms
9
HA16117F Series
3. With a 10 kHz P-RUN signal
When fP-RUN is 10 kHz, the WD duty (D = 100 x (T - t2)/2T) is 48%. As the duty is above 25%, the multivibrator (power-on and auto-reset circuit) does not oscillate. The RES signal remains high.
100 s (10 kHz) H P-RUN L H Q L H Q L H A L 5V 3.6 V CF 0.9 V 0V H WD L 5V t1 5 s 2T
3.2 V CR 1.6 V
0V H B L H C L H RES L
10
HA16117F Series
4. With a 150 kHz P-RUN signal
When fP-RUN is 100 kHz or above, the WD duty (D = 100 x (T - t2)/2T) is 25% or below. Therefore, CR is discharged, and the RES signal is output at the instant that the pin potential falls to the comparator circuit threshold value (VTL = 1.6 V).
6.6 s (150 kHz) H P-RUN L H Q L H Q L H A L 5V 3.6 V CF 0.9 V 0V H WD L 5V t1 5 s 2T
3.2 V CR 1.6 V
0V H B L H C L H RES L
11
HA16117F Series
5. tOFF when P-RUN signal 90 kHz
When the P-RUN frequency is high, even though within specification, the CR pin potential falls. If the P-RUN frequency falls sharply at this time, tOFF may be short. With values of CF = 0.01 F and CR = 0.1 F, the CR pin potential will not fall as long as the P-RUN frequency is 20 kHz or below.
H P-RUN L H Q L H Q L H A L 5V 3.6 V CF 0.9 V 0V H WD L 5V
fP_RUN 90 kHz
50 ms
3.2 V CR 1.6 V 2.3 V
0V H B L H C L H RES L tOFF 26 ms
12
HA16117F Series
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 maximum value (when fP-RUN 20 kHz). This is because the CR pin charge/discharge current ratio is 3.
2 ms H P-RUN L H Q L H Q L H A L 5V 3.6 V CF 0.9 V 0V H WD L 5V 28 ms
3.2 V CR 1.6 V
0V H B L H C L H RES 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.
8 ms H P-RUN L H Q L H Q L H A L 5V 3.6 V CF 0.9 V 0V H WD L 5V 22 ms
3.2 V CR 1.6 V
0V H B L H C L H RES L
14
HA16117F Series
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 1M Note: 1 When fP-RUN 20 kHz, tOFF is frequency-dependent, so care is required when making the P-RUN setting (see figure below).
100 k P-RUN frequency fP-RUN (Hz)
10 k
1k Normal detection region*2 100
10
1
0
50 P-RUN pulse duty D (%)
100
Note: 2. This is the region when fP-RUN is constant. If fP-RUN fluctuates within the normal detection region, the following applies: Normal detection is performed when the condition fP-RUN H/fP-RUN L < M is satisfied.
* fP-RUN dependency of VCR, tOFF, M 5 CR voltage VCR (V) 4 3 2 1 0 1k 3k 5 k 7 k 10 k P-RUN frequency (Hz) 30 k 50 k 70 k 100 k Multivibrator threshold voltage (1.6 V)
tOFF (s) 100 m
3
2M 50 m
0
1
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 Power-on reset time Reset-clock off time Reset low time Reset high time Watchdog frequency high Watchdog frequency low Symbol t ON t OFF t RL t RH fH fL q CR (pin 4) q q q q q q q q q v *2 q CF (pin 3) K (pin 8) *1
Notes: 1. K = R2 / (R1 + R2) 2. Variability of tOFF increases with increasing CF. The variability t OFF is approximately 3.3 (M) x CF (F), so CF 0.01 (F) is recommended. 3. External constants should be selected with reference to the formulas in tables 1 and 2.
Table 1
Item t ON (ms) t OFF (ms) t RL (ms) t RH (ms)
Calculation of RES Output Timing
Formula 400 () x CR (F) 1.99 x tRH (ms) 0.5 x tON (ms) 1.6 (V) x CR (F) x 103 K x 31 (A) - 15.8 (A) tOFF (ms) t RL and tRH can be set independently Notes t ON and t OFF can be set independently
t SL (ms)
Table 2
Item f H (MHz)
Calculation of Watchdog Frequency Range
Formula 1 tRH (ms) - tRL (ms) x 500 () x CF (F) tRH (ms) + tRL (ms) 1 tRL (ms) x 1.7 (M) x CF (F) tRH (ms) + tRL (ms) Whichever is larger or 1 3 x 10 tOFF (ms)
f L (Hz)
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 constant Check watchdog values frequency range fH and fL
START Set power-on reset time tON * Decide reset low time (tRL) * Select external constant CR Set reset high time tRH * Decide reset-clock off time (tOFF) * Select external constants R1 and R2 Select external constant CF
Figure 4 Procedure for Selecting External Constants
Application Example
SW
Battery 5V regulator VCC Tadj
R1 510 k R2 750 k VCC Microprocessor system RES PORT GND
CF 0.01 F CR 0.1 F
P-RUN ACC HA16117F CF GND CR RES
17
HA16117F Series
Operating Characteristics and Test Circuits
5V VTL VCC 0V
510 k 5V 0V VCC Tadj 750 k P-RUN ACC CF CR GND RES
5V RES 0V 50 ms/div
tON
0.01
0.1 Oscilloscope Circuit for measuring tON
time
Power-on reset time (tON) 5V 0V f = 500Hz duty 50%
5V VCC 50 CF CR GND RES Tadj
5V P-RUN 0V 5V RES 0V 50 ms/div
510 k
SW,OFF
750 k P-RUN ACC
tOFF
0.01
0.1 Oscilloscope Circuit for measuring tOFF
time
Reset-clock off time (tOFF)
tRH 5V RES 5V VCC Tadj
510 k
750 k P-RUN ACC CF GND RES
CR 0.01 0V tRL 20 ms/div time 0.1
CR
Oscilloscope Oscilloscope Circuit for measuring RES and CR waveforms
RES and CR waveforms at detect abnormal conditions
18
HA16117F Series
Low Voltage Threshold vs. Ambient Temperature 5.0 HA16117FA VTL -Ta Low voltage threshold VTL (V) VCC VCC (-50ppm/C) Tadj 750 k 5V regulator 12 V 510 k
4.5
P-RUN ACC CF GND RES
4.0
0.01
0.1
CR
Oscilloscope 3.5 -30
0
50
85 Test circuit
Ambient temperature Ta (C)
Threshold Hysteresis Width vs. Ambient Temperature 150 Threshold hysteresis width VHYS (mV) HA16117FA VHYS -Ta VCC VCC Tadj 750k 5V regulator 12V 510k
100
P-RUN ACC CF CR GND RES
50
0.01
0.1
Oscilloscope 0 -30
0
50
85 Test circuit
Ambient temperature Ta (C)
19
HA16117F Series
Operating Supply Current vs. P-RUN Input Frequency 500 Ta = 25C
Operating supply current ICC (A)
100
10 100
1k P-RUN input frequency fP-RUN (Hz)
10 k
20 k
A VCC pin 5V Pulse genelator 0 V to 5 V
ICC 510 k VCC Tadj 750 k
P-RUN ACC CF CR GND RES
0.01
0.1 Test circuit
20
HA16117F Series
Standby Supply Current vs. Supply Voltage 200 Ta = 25C A Standby supply current ISTBY (A) ISTBY VCC V
VCC 100
Tadj
510 k 750 k
P-RUN ACC 12 V CF CR 0.01 0.1 GND RES
Test circuit
0
5 Supply Voltage VCC (V)
7
Supply Current vs. Ambient Temperature 300
Supply current ISTBY, ICC (A)
200
f = 20 kHz ICC
100
f = 100 Hz ICC
ISTBY
0 -30
0
50
85
Ambient temperature Ta (C)
21
HA16117F Series
RES Low Voltage vs. RES pin Sink Current 0.4 51 k 75 k
RES low voltage VOL (V)
0.3 5V 0.2
VCC
Tadj
P-RUN ACC CF CR GND RES V Test circuit Io sink
(R O
0.1
N
6 1
0
)
0.01
0
0.5 m
1m
1.5 m
RES pin sink current IOL (A)
RES Low Voltage vs. Ambient Temperature 0.3 RES low voltage VOL (V) IOL = 1mA 0.2
0.1
0 -30
0
50
85
Ambient temperature Ta (C)
22
HA16117F Series
RES High Voltage vs. RES pin Source Current 5 Ta = 25C
RES high voltage VOH (V)
VCC 5V 4 0.01 0.1
Tadj
51 k 75 k
P-RUN ACC CF CR GND RES V Test circuit Io sink
3 0
500 RES pin source current Io source (A)
23
HA16117F Series
Power-on Reset Time vs. CR Capacitance 1 Ta = 25C VCC Power-on reset time tON (sec) 5V 100 m Tadj 510 k 750 k
P-RUN ACC CF CR GND RES
0.01
CR Oscilloscope
10 m VCC RES tON 1m 0.01 Test circuit 0.1 External capacitance CR (F) 1.0
RES Output Timing vs. CR Capacitance 1 Ta = 25C 510 k 750 k
RES output timing tRH, tRL (sec)
VCC 100 m tRH 5V
Tadj
P-RUN ACC CF CR GND RES
tRL 10 m
0.01
CR Oscilloscope tRH RES 5V 0V
1m 0.01
0.1 External capacitance CR (F)
1.0 Test circuit
24
HA16117F Series
High Setup Time vs. CR Capacitance 1000 Ta = 25C
High setup time tSH (sec)
100 5V
VCC
Tadj
510 k 750 k
P-RUN ACC CF GND RES RES tSH Oscilloscope 0V
10
CR 0.01 CR
1 0.01
Test circuit 0.1 External Capacitance CR (F) 1.0
Low Setup Time vs. CR Capacitance 10 Ta = 25C VCC 5V Low setup time tSL (sec) Tadj P-RUN ACC CF 1 0.01 CR CR GND RES 510 k 750 k
Oscilloscope 100 m 15 V 0V RES 10 m 0.01 0.1 1.0 Test circuit tSL
External Capacitance CR (F)
25
HA16117F Series
Reset High Time vs. K (Tadj Constant) 100 m Reset high time tRH (sec)
VCC 5V
Tadj
R1 R2
P-RUN ACC CF CR GND RES
0.01 10 m 0.56 0.6 0.7 Tadj constant K 0.8
0.1
Oscilloscope K= Test circuit R2 R1 + R2
Duty-cycle dependence of P-RUN normal frequency range 1M MPU system abnormal 100 k Abnormal if duty cycle is 0% 10 k Pulse generator MPU system normal Abnormal if duty cycle is 100% 5V 0V 0.01 0.1 5V VCC Tadj 510 R 750 R
P-RUN input frequency fP-RUN (Hz)
P-RUN ACC CF CR GND RES
1k
100
Oscilloscope
10 MPU system abnormal 1 0 50 100 P-RUN input pulse duty cycle (%)
Test circuit
Notes: 1. Normal detection is assumed when RES is not output. 2. 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.
26
HA16117F Series
P-RUN Input Frequency vs. K (Tadj constant) 1M Ta = 25C R2 K= R1 + R2 Pulse generator 10 k 5V 0V duty 50% 1k MPU system normal 100 K= Test circuit 10 MPU system abnormal 1 0.55 0.6 0.7 Tadj constant K 0.8 Notes: 1. Normal detection is assumed when RES is not output. 2. The figure at left is for a constant P-RUN frequency. 0.01 0.1 Oscilloscope R2 R1 + R2
5V VCC Tadj
100 k P-RUN input frequency fP-RUN (Hz)
R1 R2
P-RUN ACC CF CR GND RES
P-RUN High Threshold Frequency vs. CF Capacitance 10 M Ta = 25C 510 k P-RUN high threshold frequency fH (Hz) VCC 5V MPU system abnormal 1M Pulse generator CF 100 k CR Oscilloscope 0 V to 5 V duty 50% CF CR GND RES Tadj 750 k
P-RUN ACC
MPU system normal
Test circuit Notes: 1. Normal detection is assumed when RES is not output.
10 k 500 p 1000 p
2. The figure at left is for a constant P-RUN frequency. 0.01 0.03
External capacitance CF (F)
27
HA16117F Series
P-RUN Low Threshold Frequency vs. CF Capacitance 1k Ta = 25C P-RUN low threshold frequency fL (Hz) 51 k 75 k
Normal 5V 100 CR = 0.01 F
VCC
Tadj
P-RUN ACC CF CR GND RES
CR = 0.1 F Abnormal 10 CR = 1.0 F
Pulse generator CF CR Oscilloscope
Test circuit
Notes: 1. Normal detection is assumed when RES is not output. 1 500 p 1000 p 0.01 0.03 2. The figure at left is for a constant P-RUN frequency.
External Capacitance CF (F) P-RUN Input Frequency vs. Ambient Temperature 1M P-RUN abnormal P-RUN input frequency fP-RUN (Hz) 100 k 5V fH 10 k duty 50% 1k P-RUN normal Pulse generator Oscilloscope 100 fL 0.01 0.1 VCC Tadj 510 k 750 k
P-RUN ACC CF CR GND RES
10 P-RUN abnormal 1 -30 0 50 85
Test circuit
Notes: 1. Normal detection is assumed when RES is not output. 2. The figure at left is for a constant P-RUN frequency.
Ambient temperature Ta (C)
28
HA16117F Series
Power-on Reset Time vs. Ambient Temperature Power-on reset time tON (ms) 100 VCC 5V Tadj
510 k 750 k
P-RUN ACC CF GND RES
50 tON CR 0.01 CR Oscilloscope 0 -30 0 50 100
Ambient temperature Ta (C) Power-on Reset Time vs. Ambient Temperature
VCC RES tON Test circuit
tRH and tRL vs. Ambient Temperature 100
VCC 70 tRH tRH and tRL (ms) 5V
Tadj
51 k 75 k
P-RUN ACC CF CR GND RES
50
0.01
0.1 Oscilloscope
30 tRL 5V 0V
tRH
tRL
0 -35
0
50
85
Test circuit
Ambient temperature Ta (C)
29
HA16117F Series
Package Dimensions
Unit: mm
4.85 5.25 Max 5 8 4.4 1 4 *0.22 0.05 0.20 0.04 2.03 Max 0.75 Max
0.25 6.50 + 0.15 -
1.05 0 - 8
0.10 0.10
1.27 *0.42 0.08 0.40 0.06
0.25 0.60 + 0.18 -
0.15 0.12 M
*Dimension including the plating thickness Base material dimension 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/ 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 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 Hitachi Europe GmbH Electronic components Group Dornacher Strae 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
Copyright ' Hitachi, Ltd., 1998. All rights reserved. Printed in Japan.
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