S-19400 Datasheet, PDF (6/36 Pages) Seiko Instruments Inc – Watchdog operation voltage range

FOR AUTOMOTIVE 125°C OPERATION LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-19400/19401 Series
Rev.2.1_00
2. HSNT-8(2030)
Top view
1
8
4
5
Bottom view
8
1
5
4
*1
Figure 4
Table 5
Pin No.
1
2
3
4
5
6
7
8
___
S-19400 Series (Product with W / T pin)
Symbol
___
W
/ T^*2
Description
Watchdog mode switching pin
CPOR
Reset time-out period adjustment pin
CWDT
Watchdog time adjustment pin
VSS
GND pin
WEN
________
WDO
Watchdog enable pin
Watchdog output pin
WDI
Watchdog input pin
VDD
Voltage input pin
Table 6
Pin No.
1
2
3
4
5
6
7
8
___
S-19401 Series (Product without W / T pin)
Symbol
_______
RST
Description
Reset output pin
CPOR
Reset time-out period adjustment pin
CWDT
Watchdog time adjustment pin
VSS
GND pin
WEN
________
WDO
Watchdog enable pin
Watchdog output pin
WDI
Watchdog input pin
VDD
Voltage input pin
*1. Connect the heat sink of backside at shadowed area to the board, and set electric potential open or GND.
_^H__^{owever, do not use it as the function of electrode.}
*2. W_{___} / T pin = "H": Time-out mode
W / T pin = "L": Window mode
6