SN74F657DWRG4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74F657DWRG4 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 for reduced loading, with a specified current sinking capability of 24 mA at the A port and 64 mA at the B port. It operates within a supply voltage range of 4.5 V to 5.5 V and supports bidirectional data flow controlled by the T/R input. The component is characterized for operation from 0°C to 70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Integrates eight noninverting buffers with 3-state outputs alongside an 8-bit parity generator/checker circuit.
• Provides high output drive capabilities, enabling significant bus loading tolerance through strong sink and source currents.
• Features high-impedance N-P-N inputs that minimize loading effects on connected circuits.

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented applications requiring bidirectional data transfer
• Systems utilizing parity generation or error checking mechanisms

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact package type and environmental compliance status. Ensure the selected variant matches the required operating temperature range and pin configuration for your design. Cross-reference the datasheet revision history to validate all electrical characteristics before finalizing procurement specifications.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems that require both bidirectional data buffering and integrated parity checking functionality. It is suitable for applications needing high-drive outputs to manage heavy bus loads while maintaining signal integrity. Consider the 3-state output feature 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. It serves as a specialized solution for combining data transmission and error detection in a single integrated circuit. The device replaces the need for separate buffer and parity check chips, simplifying board layout and reducing component count in digital designs.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers: SN74F657DW, SN74F657DW.A