SN74HC645N

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC645N is an octal bus transceiver in the HC logic series, housed in a 20-pin PDIP package. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range of -40 °C to +85 °C. The device features high-current 3-state outputs capable of driving up to 15 LSTTL loads, with output drive currents specified at ±6 mA at 5 V. Typical propagation delay is 12 ns, while maximum values reach 135 ns at 2 V with a 150 pF load. Maximum input current is 1 µA, and maximum ICC is 80 µA.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides asynchronous two-way communication between data buses via direction control
• Features high-current 3-state outputs for driving multiple LSTTL loads
• Includes output-enable functionality to isolate buses effectively

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• Data transmission from A bus to B bus or vice versa
• Bus isolation applications using the output-enable input

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'N' corresponds to the PDIP tube packaging configuration. Confirm that the catalog status remains active for production requirements. Ensure compatibility with standard DIP-20 footprint guidelines provided in the package addendum. Check RoHS compliance status as indicated in the official documentation.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when bidirectional data transfer between buses is required without inversion. The HC series offers low power consumption suitable for general-purpose logic applications. Consider the 3-state output capability if bus sharing or isolation is necessary within the circuit design architecture.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the Texas Instruments SN74HC645 family of octal bus transceivers. It is part of the broader HC logic series designed for CMOS applications. The SN74HC645N specifically denotes the commercial grade version in a through-hole PDIP package, distinct from the military-grade SN54HC645 variants.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HC245N serves as a functional alternative for octal bus transceiver applications.