I74F657N,112

Overview

The I74F657N,112 is an octal transceiver with an integrated 8-bit parity generator and checker. It combines the functions of a 3-state bus driver and parity logic in a single package. The device supports bidirectional data flow controlled by a Transmit/Receive input. It features high-impedance inputs to reduce bus loading and provides strong output drive capabilities for reliable signal transmission across system buses.

Feature Summary

• Integrates octal transceiver buffers with 8-bit parity generation and checking logic
• Provides high-impedance base inputs to minimize loading on connected circuits
• Supports configurable odd or even parity modes via dedicated select input
• Features 3-state outputs with enhanced current sinking and sourcing capabilities

Applications

• Bus-oriented applications requiring bidirectional data transfer
• Systems utilizing combined buffer and parity error detection logic
• High-drive interfaces where reduced bus loading is critical

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the industrial temperature range (-40 °C to +85 °C) and package type. Ensure compatibility with existing 5V logic levels and check for any superseded datasheets that may contain updated electrical characteristics or pin configurations before finalizing procurement.

Selection Notes

Select this component when a design requires both octal bus driving and hardware-based parity verification within a single footprint. It is suitable for systems needing high output drive strength with minimal input loading. Verify that the required operating temperature range aligns with the industrial specification and that the 24-pin DIP package fits the target board layout constraints.

Part Context

This part belongs to the 74F series of high-speed TTL logic devices originally manufactured by Philips Semiconductors. The 'I' prefix denotes the industrial temperature grade variant. The device serves as a specialized interface solution merging standard bus transceiver functionality with error-checking logic, distinct from general-purpose logic families.

Replacement Considerations

The N74F657N is the commercial temperature range equivalent. For functional substitution, verify that the replacement device supports the same 24-pin slim DIP package and matches the electrical specifications for 5V operation and output drive currents.