MC74HC245AFELG

Overview

The MC74HC245AFELG is an octal 3-state noninverting bus transceiver manufactured by onsemi. It operates within a supply voltage range of 2.0 V to 6.0 V and features low input current of 1 µA. The device provides output drive capability for 15 LSTTL loads and interfaces directly with CMOS, NMOS, and TTL logic. It utilizes a 20-SOIC surface-mount package and contains 308 FETs or 77 equivalent gates. The component complies with JEDEC Standard No. 7A and includes an active-low Output Enable pin for high-impedance control.

Feature Summary

• Octal 3-state noninverting bus transceiver architecture
• Active-low Output Enable for high-impedance state control
• Direction control for bidirectional data flow between buses
• Direct interface compatibility with CMOS, NMOS, and TTL outputs

Applications

• Two-way asynchronous communication between data buses
• Input/Output expansion in embedded systems
• Bus-oriented transfers in computing architectures

Procurement Notes

Verify the specific suffix 'FELG' against the manufacturer's official datasheet to confirm package dimensions and tape-and-reel specifications. Ensure the order matches the exact RoHS compliance status and lead-free packaging requirements defined in the latest product documentation. Cross-reference the part number with onsemi's current availability lists to avoid obsolete variants.

Selection Notes

Select this component when an octal bidirectional transceiver with 3-state output is required for system bus isolation. It is suitable for designs needing direct interfacing with multiple logic families including LSTTL loads. Consider the 2.0 V to 6.0 V operating range and 20-SOIC package constraints during PCB layout. Verify that the noise immunity characteristics meet the environmental requirements of the target application.

Part Context

This part belongs to the MC74HC245 family of high-performance silicon-gate CMOS devices. It shares pinout compatibility with LS245 equivalents while offering CMOS input characteristics. The series is designed for general-purpose digital logic applications requiring reliable bus direction control and tri-state functionality in compact surface-mount packages.

Replacement Considerations

MC74HC245ADTG: Surface mount variant in TSSOP-20 package. MC74AC245DTG: AC series alternative with faster propagation delay (8.5 ns) and higher drive current (24 mA). MM74HC245A: DIP package version with identical logical function.