74F899SC

Overview

The Fairchild Semiconductor 74F899SC is a high-performance, non-inverting 9-bit latchable transceiver featuring integrated parity generation and checking capabilities. Designed for robust digital logic applications, it operates within a supply voltage range of 4.5V to 5.5V. The device utilizes a 28-pin SOIC package and supports 3-state outputs. It delivers an output current capability of 3mA in the high state and 64mA in the low state, ensuring reliable signal transmission in fast bipolar logic systems.

Feature Summary

• Integrates 9-bit data latching with simultaneous parity generation and error checking functions
• Provides non-inverting signal transmission with 3-state output control for bus isolation
• Utilizes Fast/Faster Bipolar Logic technology for high-speed switching performance

Applications

• High-speed data bus interfaces requiring error detection
• Memory systems utilizing parity-based integrity verification
• Digital communication links needing latchable data buffering

Procurement Notes

Verify the manufacturer designation as Fairchild Semiconductor or its successor entity onsemi when sourcing components. Confirm the specific suffix 'SC' corresponds to the 28-SOIC package variant. Ensure compatibility with standard 5V logic levels and check for any obsolescence notices from the original manufacturer before finalizing procurement plans.

Selection Notes

Select this component when a system requires simultaneous data latching and parity validation in a single integrated circuit. The 9-bit width accommodates standard byte-plus-parity configurations. Consider the 3-state output feature if multiple devices share a common data bus. Verify that the required operating speed aligns with the Fast/Faster Bipolar Logic specifications provided in the official datasheet.

Part Context

This device belongs to the 74F series of high-speed bipolar logic ICs. It serves as a specialized transceiver combining data transfer and error checking functionalities. The part is distinct from standard shift registers or simple buffers due to its built-in parity logic and latchable architecture, making it suitable for complex digital interface designs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate equivalent 9-bit latchable transceivers with parity features from other manufacturers only after verifying pinout compatibility and electrical parameter alignment with the original specifications.

FAQ

What is the function of the parity generator/checker in this device?

The integrated circuit includes logic circuits that generate parity bits during data transmission and check incoming data for parity errors, ensuring data integrity across the 9-bit bus.

Does the 74F899SC invert the input signals?

No, the device is specified as a non-inverting transceiver, meaning the output signals maintain the same logical state as the inputs when enabled.