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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
Pin Arrangement
P-RUN1 Cf1 Rf CR1 STBYadj STBY RES1 NMI NMIadj Re1 Re2 GND
1 2 3 4 5 6 7 8 9 10 11 12 (Top view)
24 23 22 21 20 19 18 17 16 15 14 13
P-RUN2 Cf2 RR CR2 SW CONT RES2 CRES VOUT VCONT CS VCC
Pin Description
Pin No. Symbol 1 2 3 P-RUN1 Cf1 Rf Function Input from main CPU to watchdog timer 1 (WDT1) For connecting capacitor Cf1 to determine WDT1 filter characteristic (frequency band) 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 (tRH1 and t RH2),reset low time (tRL1 and t RL2), and reset pulse delay at voltage drop and recovery. Use the resistor value from 100 k to 500 k. For connecting capacitor C R1 to determine ton for power-on reset and toff1, tRH1, and tRL1 of auto-reset circuit 1. For adjusting standby trigger voltage (insert a resistor between this pin and ground) Recommended range: V H2 = 2.8 to 4.0 V Standby signal output Reset signal output to main CPU Low-voltage interrupt signal output for memory backup
4 5 6 7 8
CR1 STBY adj STBY RES1 NMI
2
HA16113FPJ
Pin Description (cont)
Pin No. Symbol 9 NMI adj Function 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 For connecting resistor Re1 to determine voltage Vout for microprocessor and IC internal circuits (insert between this pin and Re2) For connecting resistor Re2 to determine voltage Vout for microprocessor and IC internal circuits (insert between this pin and ground) Ground Power supply input pin (operating range: 6 to 40 V) Input for detecting power supply current For base control of external pnp transistor Regulated voltage supplied to microprocessor and IC internal circuits Connect to 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 RES, both reset outputs also go low. When Vout recovers above NMI trigger level, first NMI output goes high, then after time tr both reset outputs also go high. Times tRES and t r are adjusted by capacitor CRES inserted between this pin and ground. Reset signal output to sub CPU Input pin for resetting sub CPU on command, or when sub CPU crashes Low input at CONT causes low output at RES2 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 22 23 24 CR2 RR Cf2 P-RUN2 For connecting capacitor C R2 to determine toff2, tRH2, and tRL2 of auto-reset circuit 2 For connecting bias resistor R R to determine t off1, toff2, tRH1, t RH2, t RL1, and tRL2. Use the resistor value from 100 k to 500 k. For connecting capacitor Cf2 to determine WDT2 filter characteristic (frequency band) Input from sub CPU to watchdog timer 2 (WDT2)
10 11 12 13 14 15 16 17
Re1 Re2 GND VCC CS VC Vout CRES
18 19 20
RES2 CONT SW
3
HA16113FPJ
Block Diagram
16 VOUT STBYdetection block 71 k -- 31.2 k + Over voltage detection block
15 VCONT 14 CS
13 VCC Detection block
3.3 k
STBY adj 5 NMI adj 9 CR1
36.8 k
69.7k
NMI detection 2 k block 80 k -- +
3.3 k
-- +
Reference voltage circuit
Re1 10 Re2 11
Regulator block
25 k
4
19 k 8.4 k 33 k
8 NMI 6 STBY Auto-reset circuit 1 + --
20 k 3.3 k
2 Cf1
I/6
19*I -- +
I
RES1 7
1 P-RUN1 CRES 17 CR2 21
I*4/3
Delay circuit block Auto-reset circuit 2
+ --
20 SW
3.3 k
RES2 18
P-RUN2 24 Cf2 23 12 GND Rf 3
I1
I2
22
RR
19
CONT
4
HA16113FPJ
Timing Waveforms
VBATT
4.7 V Vout 4.5 V 4.6 V 4.7 V
4.6 V (VNMI) 3.0 V (VSTBY)
NMI
STBY
P-RUN1
Crash
P-RUN2
Crash
RES1 ton
tOFF1
tRES tr
CONT
tRL1
tRH1
RES2
ton
tOFF1
tRES tr
tOFF2
Note: SW pin is connected to ground.
5
HA16113FPJ
Absolute Maximum Ratings (Ta = 25C)
Item VCC power supply voltage CS voltage Control pin voltage Control pin current Vout voltage P-RUN voltage SW voltage CONT voltage RES current NMI current STBY current Power dissipation
Note
Symbol VCC VCS VC IC Vout VPRUN VSW VCONT I RES I NMI I STBY PT Topr Tstg
Value 40 40 40 20 10 Vout Vout Vout 5 5 5 600 -40 to +85 -50 to +125
Unit V V V mA V V V V mA mA mA mW C C
Operating temperature Storage temperature
Note: At ambient temperatures up to Ta = 60C. Derated by 9.8 mW/C above this point.
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HA16113FPJ
Electrical Characteristics (Ta = 25C, Rf = 180 k , Cf1 = Cf2 = 0.01 F, C R1 = CR2 = 0.1 F)
Item Chip Regulator Power supply current Output voltage Symbol I CC Vo1 Vo2 Stability with respect to line Voline voltage Stability with respect to load current Ripple rejection Short-circuit detection voltage Temperature coefficient of output voltage Maximum adjustable output voltage P-RUN1/2 input section Low input voltage High input voltage High input current Watchdog section (both RES1 and RES2 outputs) Power-on time Clock-off time (1) Reset low time (1) Reset high time (1) Clock-off time (2) Reset low time (2) Reset high time (2) LVI section NMI trigger voltage Hysteresis width of above STBY trigger voltage Hysteresis width of above RES pulse delay time Drop Recovery Voload RREJ Vos Vo/T Vomax VIL1, 2 VIH1, 2 I IH1, 2 t on t off1 t RL1 t RH1 t off2 t RL2 t RH2 VNMI VHYSN VSTBY VHYSS t RES tr Min -- Typ 10 Max 15 Unit mA VCC = 6 to 17.5 V VC current = 5 mA VCC = 6 to 17.5 V VC current = 10 mA VCC = 6 to 17.5 V VC current = 10 mA VC current = 0.1 to 15 mA Vi = 0.5 Vrms fi = 1 kHz Test Conditions
4.875 5.00 4.80 -50 5.00 --
5.125 V 5.20 50 100 -- 0.20 -- 7.0 0.8 -- 0.5 60 190 30 90 60 9 30 4.75 100 3.30 1.65 -- -- V mV mV dB V ppm/ C V V V mA ms ms ms ms ms ms ms V mV V V s s
-100 -- 45 0.08 -- -- -- 2.0 -- 25 80 15 40 25 4 15 4.45 25 2.70 1.35 -- -- 75 0.14 -40 -- -- -- 0.3 40 130 20 60 40 6 20 4.60 50 3.00 1.50 200 200
VIH = VOL
RR: open RR: open RR: open RR: = 75 k RR: = 75 k RR: = 75 k
CRES = 1500 pF CRES = 1500 pF
7
HA16113FPJ
Electrical Characteristics (Ta = 25C, Rf = 180 k , Cf1 = Cf2 = 0.01 F, C R1 = CR2 = 0.1 F) (cont)
Item NMI output section NMI low voltage NMI high voltage STBY low voltage STBY high voltage STBY function initial voltage RES1/2 output section RES1/2 low voltage RES1/2 high voltage RES1/2 function initial voltage CONT and SW input section Low input voltage High input voltage Low input current High input current LVI section Temperature coefficient of NMI trigger voltage Temperature coefficient of STBY trigger voltage Symbol VOL1 VOH1 Min -- -- -- -- -- -- -- -- -- -- 2.0 Typ -- VO1 0.7 -- VO1 0.7 -- VO1 0.7 -- -- Max 0.4 -- 1.0 0.4 -- 1.0 0.4 -- 1.0 0.8 -- -- 0.5 -- -- Unit V V V V V V V V V V V A mA ppm/ C ppm/ C VIL3 = 0 V VIH3 = VOL I OL3, 4 = 2 mA I OL2 = 2 mA Test Conditions I OL1 = 2 mA
NMI function initial voltage VSTN STBY output section VOL2 VOH2 VSTS VOL3 VOH3 VSTR VIL3 VIH3 I IL3 I IH3 VH1/T VH2/T
-120 -60 -- -- -- 0.3 100 200
8
HA16113FPJ
External Circuit Constant Calculations
Equations for the various functions are given below. CR1 and Cf1 are for RES1. C R2 and Cf2 are for RES2. (Values given in equations are for reference.) Item Regulated output voltage Vout = 0.388 x Re2 + 2.63 Re1 Equation Remarks 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
VCS < Iout x RCS
When this function operates, VCONT stops drawing current from the base of the external transistor, so Vout output stops
Iout R CS V CC Re1 C S V C Vout Re2 GND
Maximum Vout Max < 7.0 V output voltage t RH, t RL (for both RES1 and RES2) t ON (for both RES1 and RES2) t OFF (for both RES1 and RES2) tr, tRES (for both RES1 and RES2) t RH = 3.2 x CR x R' t RL = 1.1 x CR x R' 1 1 1 + Rf RR
Prevents microprocessor damage that would result if the output voltage were raised too high by mistake. The maximum output voltage is fixed. R' = Determines the frequency and duty cycle of the reset pulse RES Sets the time from the rise of Vout to the clearing of RES output 1 1 1 + Rf RR Sets the time from when P-RUN pulses stop until the reset pulse is output
tRL
tRH
t ON = 2.2 x CR x Rf
Vout RES P-RUN tOFF tON
tOFF = 6.1 x C R x R' R' =
RES t r = 0.75 x CRES x Rf t RES = 0.625 x CRES x 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. tRES is the time from the fall of NMI to the fall of RES. 4.65 V (typ) Vout NMI RES tr tRES 4.6 V (typ)
9
HA16113FPJ
External Circuit Constant Calculations (cont)
Item VNMI Equation
V NMI = 1.2 x 1 + (R1 // 71.7) (R2 // 25)
Remarks 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 Vout R1 NMIadj R2 NMI NMI t 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. Vout STBYadj R3
(R3 is in k )
NMI recovery voltage (V NMI high) is: V NMI high = 86.65 86.65 + + 1.2 R2 // 25 R1 73.8 1+ R1 (R1 and R2 are in k )
VNMI high VNMI
VSTBY
V STBY = 71 1.47x 1 + 31.2 + (36.8 // R3)
VSTBY high Vout VSTBY STBY STBY t
WDT.
Line1 =
0.31 x (Du - 24) Cf x Rf 0.015 Cf x Rf 1 - Du 2.1 x tRH
Line2 = Du (= 25%)* Line3 = Line4 =
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 CR, Cf, and the state of P-RUN. (Hz) Line1
Line5 = 99% * Du is the duty cycle of the P-RUN pulse. t RH Du = t RL + t RH Note: Line2 and Line5 are fixed. Frequency
Normal area Line2 Line3
Line4 Duty
Line5 (%)
10
HA16113FPJ
Operating Interconnections (example)
VCC RES STBY NMI PORT PORT MAIN CPU
GND
Re2
Re1
NMI adj
NMI RES1 STBY STBY CR1 adj HA16113
Rf
Cf1 P-RUN1
VCC
CS
VC
Vout CRES RES2 CONT SW
CR2
RR
Cf2 P-RUN2
SYSTEM VCC PORT VCC Batt. NMI STBY RES SUB CPU
11
HA16113FPJ
Characteristic Curves
Watchdog timer characteristic 10 k
1k Normal area
100
P-RUN1 P-RUN2 R F CR C F 0.01 F 180 k 0.1 F Test circuit
10 0 20 40 60 80 100 (%)
Vout characteristic 5.4 5.3 Re1 = 1 k 5.2 5.1 Regulated output voltage (V) 5.0 4.9 4.8 4.7 ICONT 5 mA VCC VCONT VOUT HA16113FPJ RL Re1 Re2 16 Re1 = 1.5 k Re1 = 2 k
4
6
8
10 Re2 resistance (k )
12
14
12
HA16113FPJ
ton characteristic 140 120 100 ton (ms) 80 60 40 20 0 60 100 140 180 Rf resistance (k ) 220 Cf = 0.047 F 260 Cf = 0.1 F 12 V RES1, RES2 CR1, CR2 Rf NMI Vary the external capacitance (CR) and resistance (Rf) that determine the ton time and measure the variation in ton. (Same for RES1 and RES2) Cf = 0.22 F Measure with oscilloscope
toff characteristic 400 Vary the external capacitance (CR) and resistance (Rf) and measure the variation in toff . (Same for RES1 and RES2) 300 CR = 0.22 F toff (ms) 200 RES1 RES2
100
CR = 0.1 F CR = 0.047 F
0
60
100
140
180 Rf resistance (k )
220
260
13
HA16113FPJ
t RL characteristic Vary the external capacitance (CR) and resistance (Rf) and measure the variation in t RL . (Same for RES1 and RES2) RES1 RES2
60
CR = 0.22 F 40 t RL (ms) CR = 0.1 F CR = 0.047 F 0 60 100 140 180 220 260
20
Rf resistance (k )
t RH characteristic 180 Vary the external capacitance (CR) and resistance (Rf) and measure the variation in t RH. (Same for RES1 and RES2) RES1 RES2 C R = 0.22 F
140
t RH (ms)
100
60
C R = 0.1 F C R = 0.047 F 60 100 140 180 Rf resistance (k ) 220 260
20
14
HA16113FPJ
tr characteristic (for both RES1 and RES2) 800 12 V 600 CRES R
f
RES2 NMI
Measure with oscilloscope
CRES = 740 pF
tr (s)
400
CRES = 1500 pF
200 CRES = 3300 pF
0
60
100
140
180 Rf resistance (k )
220
260
t RES characteristic (for both RES1 and RES2) 600 500 400 t RES (s) 300 CRES = 1500 pF 200 100 0 CRES = 3300 pF 12 V RES2 CRES R f NMI
Measure with oscilloscope
CRES = 740 pF
60
100
140
180 Rf resistance (k )
220
260
15
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 VIGN Co RL
Relay or other load Wiring impedance
Figure 1 Typical Circuit
Vout VCC Vcont Wiring impedance C RES + -
RES
GND
Figure 2 RES Comparator
16
HA16113FPJ
Package Dimensions
Unit: mm
15.8 16.2 Max 24 13 8.4 1 1.12 Max 2.50 Max
*0.17 0.05 0.15 0.04
12
11.8 0.3 1.7 0 - 8
1.27 0.15
*0.40 0.08 0.38 0.06
0.20 0.10
1.0 0.2
0.20 M
*Dimension including the plating thickness Base material dimension
Hitachi Code JEDEC EIAJ Mass (reference value)
FP-24D Conforms -- 0.6 g
17
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.
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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