74HC245N,652

Overview

The NXP USA Inc. 74HC245N,652 is an octal bus transceiver with 3-state outputs manufactured by Nexperia. It operates within a supply voltage range of 2.0 V to 6.0 V and features CMOS low power dissipation. The device includes output enable (OE) and send/receive (DIR) controls for direction management. Inputs incorporate clamp diodes to allow interfacing with voltages exceeding VCC using current limiting resistors. It complies with JEDEC standards JESD8C and JESD7A.

Feature Summary

• Octal bidirectional bus interface with non-inverting 3-state outputs
• Wide supply voltage range from 2.0 V to 6.0 V
• High noise immunity and CMOS low power dissipation
• Input levels compatible with CMOS logic

Applications

• High-noise environments requiring robust signal transmission
• Systems utilizing multiple data buses
• Low-power electronic designs
• Applications requiring isolation between bus lines

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to confirm package type and temperature range. Confirm that the component meets required environmental standards such as RoHS compliance. Ensure the selected variant matches the intended operating temperature conditions for the application design.

Selection Notes

Select this component when an 8-bit bidirectional interface is required with high noise immunity. The wide voltage range supports various logic families. Verify input compatibility, as this HC version uses CMOS levels rather than TTL levels found in HCT variants. Consider the PDIP-20 package constraints for PCB layout.

Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices. It functions as an octal bus transceiver, providing a standard solution for connecting microprocessors or memory systems to peripheral buses. The device is designed to minimize external timing requirements through its control inputs.

Replacement Considerations

Direct replacements include other manufacturers' SN74HC245 parts. Variants like 74HCT245 offer TTL-compatible inputs but differ in electrical characteristics. Ensure pinout compatibility and verify that voltage ranges match the target system requirements before substitution.