SN74F657DWRE4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74F657DWRE4 is an octal transceiver with parity generator/checker and 3-state outputs. It combines the functions of the SN74F245 and SN74F280B in one package. The device features high-impedance N-P-N inputs, reducing loading to 70 μA in both low and high states. B port outputs sink 64 mA and source 15 mA. It operates from 0°C to 70°C with a supply voltage range of 4.5 V to 5.5 V.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Combines bidirectional data transfer with integrated parity generation and checking capabilities
• Features high-impedance N-P-N inputs for reduced circuit loading
• Provides strong output drive capability with specific current sinking and sourcing ratings
• Includes dedicated error detection output pin for parity mismatch identification

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented applications requiring bidirectional data flow control
• Systems utilizing odd or even parity configurations for data integrity verification
• Digital circuits needing combined buffering and error detection in a single component

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the exact ordering suffix matches the required package type and lead finish. Confirm RoHS compliance status and moisture sensitivity level requirements against your manufacturing process specifications. Ensure the operating temperature range aligns with your system's environmental conditions before finalizing procurement orders.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an application requires both octal bus transceiving and hardware-based parity checking within a single integrated circuit. It serves as a direct functional replacement for designs previously using separate buffer and parity generator chips. Consider the 3-state output capability for efficient bus sharing in complex digital architectures.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the Texas Instruments SN74F logic family, known for high-speed performance. The 'DW' suffix indicates a Plastic Small-Outline Package (SOIC), while 'RE4' denotes specific packaging and environmental compliance attributes defined by the manufacturer. It is designed for general-purpose digital logic applications.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74F657DW