ICS9WDV3501B Datasheet, PDF (3/9 Pages) Integrated Device Technology – VOLTAGE MONITOR/WATCHDOG TIMER CIRCUIT

ICS9WDV3501B
Voltage Monitor/Watchdog Timer Circuit
TSSOP Pin Configuration
Advance Information
Advance Information
VMON1 1
VMON0 2
VDDA 3
WTB1 4
WTB0 5
WDI 6
RP 7
GND 8
*WDI_EN 9
RESET1# 10
20 ^VMON2
19 ^VMON3
18 ^VMON4
17 ^GNDA
16 ^RST1_SEL1
15 ^RST1_SEL0
14 ^RST0_SEL1
13 ^RST0_SEL0
12 ^VDD
11 ^RESET0#
20-pin TSSOP
pins preceded by '*' have 100kohm internal pull up.
TSSOP Pin Description
PIN #
(TSSOP)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
PIN NAME
VMON1
VMON0
VDDA
WTB1
WTB0
WDI
RP
GND
*WDI_EN
RESET1#
RESET0#
VDD
RST0_SEL0
RST0_SEL1
RST1_SEL0
RST1_SEL1
GNDA
VMON4
VMON3
VMON2
PIN TYPE
PWR
IN
PWR
IN
IN
IN
IN
GND
IN
OUT
OUT
PWR
IN
IN
IN
IN
GND
IN
IN
IN
DESCRIPTION
Voltage Monitor Input, nominal 1.0V threshold
Voltage Monitor Input, nominal 1.0V threshold
3.3V Analog Power Supply
Watchdog timout select bit. (MSB)
Watchdog timout select bit. (LSB)
Watchdog Input
Resistor connection for internal oscillator
Ground pin
This input enables or disables the watchdog timer. 0 = Disable, 1 = Enable
RESET 1 output. Low = Reset, High = Normal Operation
RESET 0 output. Low = Reset, High = Normal Operation
3.3V Power Supply
RESET1 timeout period select (LSB)
RESET1 timeout period select (MSB)
RESET1 timeout period select (LSB)
RESET1 timeout period select (MSB)
Analog Ground
Voltage Monitor Input, nominal 1.0V threshold
Voltage Monitor Input, nominal 1.0V threshold
Voltage Monitor Input, nominal 1.0V threshold
IDT^TM/ICS^TM Voltage Monitor/Watchdog Timer Circuit
3
1568—05/30/08