MM74C908 Dual CMOS 30V Relay Driver

National Semiconductor

Description

MM74C908 MM74C918 Dual CMOS 30V Relay Driver November 1990 MM74C908 MM74C918 Dual CMOS 30V Relay Driver General .
Features The MM74C908 and MM74C918 are general purpose dual high voltage drivers each capable of sourcing a minimum of 250 mA at VOUT e VCC b 3V and.

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Datasheet Specifications

Part number: MM74C908
Manufacturer: National Semiconductor
File Size: 133.26 KB
Datasheet: MM74C908-NationalSemiconductor.pdf
Description: Dual CMOS 30V Relay Driver

Features

* The MM74C908 and MM74C918 are general purpose dual high voltage drivers each capable of sourcing a minimum of 250 mA at VOUT e VCC b 3V and TJ e 65 C The MM74C908 and MM74C918 consist of two CMOS NAND gates driving an emitter follower Darlington output to achieve high current drive and high voltage

Applications

* (See AN-177 for applications) TL F 5912
* 6 For example let VCC e 15V RLA e 100X RLB e 100X VL e 0V TA e 25 C iJA e 110 C W Duty CycleA e 50% Duty CycleB e 75% Assuming RON e 11X then IOA e VCC b VL RON a RLA 15 e e 135 1 mA 11 a 100 IOB e VCC b VL RON a RLB e 135 1 mA and TJ

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MM74C908 Dual CMOS 30V Relay Driver National Semiconductor

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