Document
S-1410/1411 Series
www.sii-ic.com © Seiko Instruments Inc., 2015
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
Rev.1.0_01
The S-1410/1411 Series is a watchdog timer developed using CMOS technology, which can operate with low current consumption of 3.8 μA typ. The reset function and the low voltage detection function are available.
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
2.0 V to 5.0 V, selectable in 0.1 V step
±1.5%
VDD = 0.9 V to 6.0 V 5% typ.
3.8 μA 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-1410 Series___
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(Product with W / T pin (Output: WDO pin))
S-1411 Series ___
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(Product without W / T pin (Output: RST pin, WDO pin))
Ta = −40°C to +105°C
*1. The S-1411 Series is fixed to the window mode.
Applications
• Power supply monitoring of microcontroller mounted apparatus and system monitoring
Package
• TMSOP-8
Seiko Instruments Inc.
1
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.1.0_01
Block Diagrams
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1. S-1410 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
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2. S-1411 Series (Product without W / T pin)
CWDT
VDD
WDO
WEN WDI
Noise filter
Noise filter
WDT circuit
RST WDO
VSS
Reference voltage circuit
Voltage detection circuit
CPOR Figure 2
2 Seiko Instruments Inc.
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
Rev.1.0_01
S-1410/1411 Series
Product Name Structure
Users can select the product types, detection voltage for the S-1410/1411 Series. Refer to "1. Product name" regarding the contents of product name, "2. Product type list" regarding the product types, "3. Package" regarding the package drawings.
1. Product name
S-141 x x xx - K8T2 U 4
Environmental code U: Lead-free (Sn 100%), halogen-free
Package abbreviation and IC packing specifications*1 K8T2: TMSOP-8, Tape
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-14_1__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.
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1: S-14_1__1__S__e_ ries (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 .