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S-1411 Dataheets PDF



Part Number S-1411
Manufacturers Seiko Instruments
Logo Seiko Instruments
Description LOW CURRENT CONSUMPTION WATCHDOG TIMER
Datasheet S-1411 DatasheetS-1411 Datasheet (PDF)

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: • .

  S-1411   S-1411


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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___ ________ (Product with W / T pin (Output: WDO pin)) S-1411 Series ___ _______ ________ (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 ____ 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 ____ 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. ___ 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 pin outputs the signal which is from the voltage detection circuit. The watchdog mode is fixed to the window mode. Seiko Instruments Inc. 3 LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-1410/1411 Series Rev.1.0_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. Package Package Name TMSOP-8 Table 2 Package Drawing Codes Dimension Tape FM008-A-P-SD FM008-A-C-SD Reel FM008-A-R-SD 4 Seiko Instruments Inc. LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.0_01 S-1410/1411 Series  Pin Configuration 1. TMSOP-8 Top view 18 27 36 45 Figure 3 ___ Table 3 S-1410 Series (Product with W / T pin) Pin No. 1 Symbol ___ W / T*1 Description Watchdog mode switching pin 2 CPOR Reset time-out period adjustment pin 3 CWDT Watchdog time adjustment pin 4 VSS GND pin 5 WEN Watchdog enable pin ________ 6 WDO Watchdog output pin 7 WDI Watchdog input pin 8 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-1411 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 Seiko Instruments Inc. 5 LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-1410/141.


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