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© ABLIC Inc., 2014-2017
S-19400/19401 Series
AUTOMOTIVE, 125°C OPERATION,
3.8 A CURRENT CONSUMPTION
WATCHDOG TIMER WITH RESET FUNCTION
Rev.2.2_01
The S-19400/19401 Series is a watchdog timer developed using CMOS technology, which can operate with low current
consumption of 3.8 A typ. The reset function and the low voltage detection function are available.
Caution This product can be used in vehicle equipment and in-vehicle equipment. Before using the product in
the purpose, contact to ABLIC Inc. is indispensable.
Features
Detection voltage:
Detection voltage accuracy:
Input voltage:
Hysteresis width:
Current consumption:
Reset time-out period:
Watchdog operation is switchable:
Watchdog operation voltage range:
Watchdog mode switching function*1:
Watchdog input edge is selectable:
Product type is selectable:
Operation temperature range:
Lead-free (Sn 100%), halogen-free
AEC-Q100 qualified*2
2.0 V to 5.0 V, selectable in 0.1 V step
2.0%
VDD = 0.9 V to 6.0 V
5% typ.
3.8 A typ.
14.5 ms typ. (CPOR = 2200 pF)
Enable, Disable
2.5 V to 6.0 V
Time-out mode, window mode
Rising edge, falling edge, both rising and falling edges
S-19400 Serie_s__
________
(Product with W / T pin (Output: WDO pin))
S-19401 Series ___
_______
________
(Product without W / T pin (Output: RST pin, WDO pin))
Ta = 40°C to 125°C
*1. The S-19401 Series is fixed to the window mode.
*2. Contact our sales office for details.
Applications
Automotive (engine, transmission, suspension, ABS, related-devices for EV / HEV / PHEV, etc.)
Packages
TMSOP-8
HSNT-8(2030)
1

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AUTOMOTIVE, 125°C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-19400/19401 Series
Rev.2.2_01
Block Diagrams
____
1. S-19400 Series (Product with W / T pin)
VDD
WEN
WDI
W/T
Noise
filter
Noise
filter
Noise
filter
CWDT
WDT circuit
VSS
Reference
voltage
circuit
Voltage detection
circuit
CPOR
Figure 1
____
2. S-19401 Series (Product without W / T pin)
CWDT
VDD
WDO
WEN
WDI
VSS
Noise
filter
Noise
filter
WDT circuit
Reference
voltage
circuit
Voltage detection
circuit
Figure 2
CPOR
RST
WDO
2

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AUTOMOTIVE, 125°C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
Rev.2.2_01
S-19400/19401 Series
AEC-Q100 Qualified
This IC supports AEC-Q100 for the operation temperature grade 1.
Contact our sales office for details of AEC-Q100 reliability specification.
Product Name Structure
Users can select the product type, detection voltage, and package type for the S-19400/19401 Series. Refer to "1.
Product name" regarding the contents of product name, "2. Product type list" regarding the product types, "3.
Packages" regarding the package drawings.
1. Product name
S-1940 x x xx A - xxxx U 4
Environmental code
U: Lead-free (Sn 100%), halogen-free
Package abbreviation and IC packing specifications*1
K8T2: TMSOP-8, Tape
A8T1: HSNT-8(2030), Tape
Operation temperature
A: Ta = 40C to 125C
Detection voltage
20 to 50
(e.g., when the detection voltage is 2.0 V, it is expressed as 20.)
Product type 1*2
A to L
Product type 2*3
0, 1
*1. Refer to the tape drawing.
*2. Refer to "2. Product type list". ___
*3. 0: S-19_4__0__0__S_ eries (Product with W / T pin)
The WDO pin outputs the signals which are from the watchdog timer circuit and the voltage detection
circuit.
___
1: S-19_4__0_1___S_ eries (Product without W / T pin)
The WDO pin outputs the signals which are from the watchdog timer circuit and the voltage detection
circui_t_._____
The RST pin outputs the signal which is from the voltage detection circuit.
The watchdog mode is fixed to the window mode.
3

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AUTOMOTIVE, 125°C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-19400/19401 Series
Rev.2.2_01
2. Product type list
Product Type
A
B
C
D
E
F
G
H
I
J
K
L
WEN Pin Logic
Active "H"
Active "H"
Active "H"
Active "L"
Active "L"
Active "L"
Active "H"
Active "H"
Active "H"
Active "L"
Active "L"
Active "L"
Table 1
Input Edge
Rising edge
Falling edge
Both rising and falling edges
Rising edge
Falling edge
Both rising and falling edges
Rising edge
Falling edge
Both rising and falling edges
Rising edge
Falling edge
Both rising and falling edges
Output Pull-up Resistor
Available
Available
Available
Available
Available
Available
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
3. Packages
Package Name
TMSOP-8
HSNT-8(2030)
Table 2
Dimension
FM008-A-P-SD
PP008-A-P-SD
Package Drawing Codes
Tape
Reel
FM008-A-C-SD
PP008-A-C-SD
FM008-A-R-SD
PP008-A-R-SD
Land
PP008-A-L-SD
4

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AUTOMOTIVE, 125°C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
Rev.2.2_01
S-19400/19401 Series
Pin Configurations
1. TMSOP-8
Top view
18
27
36
45
Figure 3
Table 3
Pin No.
1
2
3
4
5
6
7
8
___
S-19400 Series (Product with W / T pin)
Symbol
___
W
/ T*1
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
___
*1. W___ / T pin = "H": Time-out mode
W / T pin = "L": Window mode
Table 4
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
_W___E__N__
WDO
Watchdog enable pin
Watchdog output pin
WDI Watchdog input pin
VDD
Voltage input pin
5