CD74FCT2244ATM

Overview

The CD74FCT2244ATM is a bus driver from the FCT series, manufactured by Harris Corporation. It features two independent functions, each handling four bits of data with true output polarity. The device utilizes CMOS technology and is housed in a PDSO20 package. It operates within a temperature range of -40 °C to 85 °C. The component includes typical VOLP characteristics of 1V at VCC = 5V and TA = 25°C. It supports a load capacitance of 50 pF and has a maximum output current (Iol) of 0.064 A.

Feature Summary

• Provides dual 4-bit bus driving capability with true output polarity for signal buffering.
• Incorporates 3-state outputs controlled by low-enable signals to manage bus traffic effectively.
• Features built-in series resistors on all outputs to reduce signal reflections and ringing.

Applications

• Bus drivers in high-speed digital systems
• Memory interface buffering
• Address bus driving applications

Procurement Notes

Verify the manufacturer designation as Harris Corporation or its successors, noting that original documentation may reference legacy branding. Confirm the PDSO20 package type and ensure compatibility with the specified -40 °C to 85 °C operating temperature range. Check RoHS compliance status, as indicated by 'Not Qualified' in available records. Validate the presence of internal series resistors if signal integrity requirements are critical for the specific application design.

Selection Notes

Select this component when dual 4-bit non-inverting bus driving is required with integrated series resistance. Ensure the system voltage aligns with standard FCT logic levels. Consider the PDSO20 footprint constraints during PCB layout. Verify that the 3-state enable logic matches the system control scheme. Compare against other FCT series variants if inverted outputs or different bit widths are needed.

Part Context

This part belongs to the Harris FCT (Fast CMOS) logic family, designed for high-speed performance comparable to LS-TTL but with CMOS power advantages. The CD74 prefix indicates it is a buffered version of the standard 74FCT2244. Harris Corporation was a significant producer of such logic ICs before industry consolidations. The device serves as a buffer between microprocessors and peripheral devices or memory banks.

Replacement Considerations

Cross-reference with PI74FCT2244ATS from Pericom/Diodes Incorporated, which shares identical functional specifications and pinout. Verify package compatibility and electrical parameters against Renesas or IDT equivalents if sourcing from modern distributors. Ensure substitute parts maintain the same series resistor configuration and 3-state control logic.