74FCT162501CTPACT

Overview

The Texas Instruments 74FCT162501CTPACT is an 18-bit registered universal bus transceiver housed in a 56-lead Thin Shrink Small Outline Package (TSSOP). It operates within an industrial temperature range of -40°C to +85°C and requires a 5V ± 10% power supply. The device features balanced 24 mA output drivers with current limiting resistors, which reduce system switching noise and ground bounce. Propagation delay from A to B or B to A is specified between 1.5 ns and 4.6 ns. It supports partial-power-down mode via Ioff circuitry.

Feature Summary

• Supports transparent, latched, or clock modes through D-type latch and flip-flop combinations
• Includes Ioff circuitry to prevent damaging current backflow during partial-power-down
• Features edge-rate control circuitry for improved noise characteristics
• Balanced output drivers minimize undershoot and eliminate the need for external terminating resistors

Applications

• Driving high-capacitance loads
• Connecting low-impedance backplanes
• Driving transmission lines

Procurement Notes

Verify the component status as obsolete before procurement planning. Confirm that the TSSOP package dimensions match the design footprint. Ensure the operating voltage range aligns with the system's 5V requirements. Check for lead-free compliance if required by environmental standards.

Selection Notes

Select this component when 18-bit data transfer with registered functionality is required. The balanced drivers are suitable for applications needing reduced ground bounce without external termination. Consider the TSSOP package size constraints and the industrial temperature range suitability for the target environment.

Part Context

This part belongs to the CY74FCT162501T family of 18-bit registered transceivers. It shares functional similarities with the CY74FCT16501T and CY74FCT162H501T but differs in driver strength and input features. The 'C' suffix indicates specific speed grading compared to the 'A' variant.

Replacement Considerations

CY74FCT162501ATPVC

FAQ

How does the device handle partial-power-down?

The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

What controls the data flow direction?

Data flow is controlled by output enable (OEAB/OEBA), latch enable (LEAB/LEBA), and clock inputs (CLKAB/CLKBA).