74ACT11286N

Overview

The Texas Instruments 74ACT11286N is a universal 9-bit parity generator and checker implemented in the ACT logic series. It features TTL-compatible inputs and CMOS outputs, operating within a supply voltage range of 4.5 V to 5.5 V. The device provides high-level output current of -24 mA and low-level output current of 24 mA. Propagation delays from data inputs (A-I) to the Parity I/O port range from 2.7 ns to 10.8 ns, while delays to the Parity Error output range from 3 ns to 12.9 ns. It operates reliably across an ambient temperature range of -40°C to +85°C.

Feature Summary

• Generates or checks odd/even parity for nine data lines with cascading capability for extended word lengths
• Features a dedicated XMIT control input to disable the parity tree and maintain high-impedance states during power transitions
• Utilizes center-pin VCC and GND configurations to minimize high-speed switching noise
• Incorporates EPIC (Enhanced-Performance Implanted CMOS) technology for robust latch-up immunity

Applications

• Data bus parity checking and generation in digital communication systems
• Memory subsystem error detection circuits
• Cascaded multi-word parity verification architectures

Procurement Notes

Verify that the specific orderable part number matches the required package style, as the 74ACT11286N designation specifically refers to the plastic DIP variant. Confirm RoHS compliance status and lead finish details against the manufacturer's latest ordering information. Ensure the component meets the specified industrial temperature range requirements for the intended application environment before finalizing procurement.

Selection Notes

Select this component when a single-chip solution for 9-bit parity processing is required with TTL interface compatibility. The ACT series offers faster propagation speeds compared to standard LS logic while maintaining CMOS power efficiency. Consider the PDIP-14 package constraints regarding pin count and physical footprint if space is limited, or evaluate SOIC alternatives for surface-mount implementations.

Part Context

This device belongs to the Texas Instruments 74ACT family of advanced CMOS logic devices. It is functionally equivalent to other universal parity generators within the industry standard 74xx series architecture. The N suffix indicates a standard plastic dual-in-line package suitable for through-hole mounting on printed circuit boards.

Replacement Considerations

Equivalent parts include the SN74ACT11286 variants and other 74ACT-series parity checkers. Verify pinout compatibility and electrical characteristics such as propagation delay and drive current when substituting with components from different manufacturers.