SNJ55451BFK

Description：MILITARY 2-CH, 4.5-V TO 5.5-V IN
Series：-
Mfr：Texas Instruments
Package：Tube

SKU:4d9523708538 Category: Buffers, Drivers, Receivers, Transceivers Brand: Texas Instruments

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Product introduction

Product Detailed Parameters

Description：MILITARY 2-CH, 4.5-V TO 5.5-V IN
Series：-
Mfr：Texas Instruments
Package：Tube
Logic Type：Peripheral Driver
Number of Elements：2
Number of Bits per Element：1
Input Type：-
Output Type：Open Collector
Current - Output High, Low：300µA, 300mA
Voltage - Supply：4.5V ~ 5.5V
Operating Temperature：-55°C ~ 125°C (TA)
Mounting Type：Surface Mount
Package / Case：20-CLCC
Supplier Device Package：20-LCCC (8.89x8.89)
Grade：-
Qualification：-

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SNJ55451BFK

Overview

The SNJ55451BFK is a dual-peripheral driver from the SN5545xB family, designed for high-current and high-speed switching applications in systems employing TTL logic. It features AND logic inputs with open-collector outputs capable of driving loads up to 300mA. The device operates on standard supply voltages ranging from 4.5V to 5.5V and supports high-voltage outputs up to 30V without latch-up issues after conducting rated current. Packaged in a 20-pin LCCC (FK) format, it is characterized for operation over the full military temperature range of –55°C to 125°C.

Feature Summary

High-current capability supporting up to 300mA output drive
High-voltage output tolerance reaching 30V
Immunity to output latch-up at 20V following high-current conduction
TTL-compatible diode-clamped inputs for simplified circuit design

Applications

High-speed logic buffers
Power drivers
Lamp drivers
LED drivers
Line drivers

Procurement Notes

Verify the specific ordering suffix FK corresponds to the 20-pin LCCC package configuration required for your layout. Confirm that the military-grade temperature rating aligns with your environmental specifications. Ensure input channels are not left floating during operation to prevent undefined logic states. Validate power supply bypassing requirements using appropriate capacitance values.

Selection Notes

Select this component when military-grade reliability and extended temperature performance are mandatory. The SNJ55451BFK replaces older SN75450 series devices while maintaining functional compatibility. Consider the 20-pin LCCC package constraints regarding board space and thermal dissipation. Verify that the AND logic function meets the specific control requirements of the peripheral load being driven.

Part Context

This device belongs to the SN5545xB family of dual-peripheral drivers manufactured by Texas Instruments. It is functionally interchangeable with previous SN75450 and SN75450A families. The SN5545xB designation indicates military-grade characterization, distinguishing it from the commercial SN7545xB variants which operate within a narrower temperature range.