BD87A28FVM-TR ROHM

Datasheet Voltage Detectors Voltage Detector ICs with Watchdog Timer BD37Axx Series BD87Axx Series BD99A41F General Description Key Specifications The BD37A19FVM, BD37A41FVM, BD87A28FVM, RESET Power Supply Voltage Range: 1.0V to 10V BD87A29FVM, BD87A34FVM, BD87A41FVM and WDT Power Supply Voltage Range: 2.5V to 10V BD99A41F are watchdog timer reset ICs. It delivers a High Precision Detection Voltage: high precision detection voltage of 1.5% and a (Ta = 25C) 1.5% super-low current consumption of 5 A (Typ). It can be (Ta = 40C to 105C) 2.5% used in a wide range of electronic devices to monitor Super-Low Current Consumption: 5A(Typ) power supply voltages and in system operation to Operating Temperature Range: -40C to +105C prevent runaway operation. Packages W (Typ) x D (Typ) x H (Max) Features MSOP8 2.90mm x 4.00mm x 0.90mm Built-in Watchdog Timer Reset delay time can be set with the CT pin s external capacitance Watchdog timer monitor time and reset time can be set with the CTW pin s external capacitance. Output Circuit Type: N-Channel Open Drain Applications SOP8 5.00mm x 6.20mm x 1.71mm All devices using microcontrollers or DSP, including vehicle equipment, displays, servers, DVD players, and telephone systems Ordering Information B D 3 7 A 1 9 F V M - T R Part Number Detection Voltage Package Packaging and forming specification 37AWDT H Active 191.9V FVM : MSOP8 TR: Embossed tape and reel F : SOP8 E2: Embossed tape and reel 87AWDT L Active 282.8V 99AWDT H Active 292.9V 343.4V 414.1V Lineup Detection voltage (Typ) INH logic Package Orderable Part Number H: Active MSOP8 Reel of 3000 1.9V BD37A19FVM-TR H: Active MSOP8 Reel of 3000 4.1V BD37A41FVM-TR L: Active MSOP8 Reel of 3000 2.8V BD87A28FVM-TR 2.9V L: Active MSOP8 Reel of 3000 BD87A29FVM-TR 3.4V L: Active MSOP8 Reel of 3000 BD87A34FVM-TR L: Active MSOP8 Reel of 3000 4.1V BD87A41FVM-TR Reel of 2500 4.1V H: Active SOP8 BD99A41F-E2 Product structureSilicon monolithic integrated circuit This product has not designed protection against radioactive rays .w ww.rohm.com TSZ02201-0G1G0AN00130-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/15 TSZ2211114001 05.Jul.2018 Rev.004 Datasheet BD37Axx Series BD87Axx Series BD99A41F Pin Configurations MSOP8 SOP8 (TOP VIEW) (TOP VIEW) 8 7 6 5 8 7 6 5 1 2 3 4 1 2 3 4 Figure 1. Pin Configurations Pin Descriptions BD37AxxFVM BD87AxxFVM / BD99A41F Pin Pin No. Function No. Function name name 1 CLK Clock input from microcontroller 1 CTW WDT time setting capacitor connection pin Reset delay time setting capacitor Reset delay time setting capacitor 2 CT 2 CT connection pin connection pin 3 CTW WDT time setting capacitor connection pin 3 CLK Clock input from microcontroller 4 VDD Power supply pin 4 GND GND pin 5 N.C. NC pin 5 VDD Power supply pin WDT ON/OFF setting pin 6 GND GND pin 6 INH INH=H/L:WDT=OFF/ON(BD87AxxFVM) INH=H/L:WDT=ON/OFF(BD99A41F) WDT ON/OFF setting pin 7 INH 7 N.C. NC pin INH=H/L:WDT=ON/OFF 8 RESET Reset output pin 8 RESET Reset output pin Block Diagrams BD37AxxFVM BD87AxxFVM / BD99A41F VDD VDD RESET RESET 8 8 CTW CLK 1 1 R R S Q S Q + + Vref Vref N.C. INH CT CT 2 7 2 7 VDD VDD Pulse Generation + + INH R Circuit R GND CLK CTW Q Q 3 6 3 6 S S + + Pulse Generation Circuit VthH VthL VthH VthL GND VDD VDD N.C. 5 4 5 4 CT pin capacitor: 470pF to 3.3F CTW pin capacitor: 0.001F to 10F Figure 2.Block Diagrams www.rohm.com TSZ02201-0G1G0AN00130-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/15 TSZ2211115001 05.Jul.2018 Rev.004