SN74HCT645NE4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HCT645NE4 is an octal bus transceiver with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of -40°C to 85°C. The device features high-current outputs capable of driving up to 15 LSTTL loads, providing ±6 mA output drive at 5 V. Typical propagation delay is 14 ns. Input current is limited to 1 µA maximum, while maximum ICC is 80 µA.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Designed for asynchronous two-way communication between data buses
• Direction control input determines data flow direction between A and B buses
• Output-enable input isolates buses when disabled
• Inputs are TTL-voltage compatible

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• Bus-oriented architectures requiring bidirectional data transfer
• Systems utilizing TTL-compatible logic interfaces

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'E' against official documentation to confirm lead-free status or environmental compliance details. Confirm package type availability as datasheet lists N (PDIP), DW (SOIC), NS (SOP), and PW (TSSOP) variants. Ensure compatibility with required operating temperature ranges and voltage specifications before procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring octal bidirectional data transfer with TTL-compatible inputs. Consider the HCT series for low power consumption and standard CMOS performance. Verify that the required package style matches the PCB layout constraints and that the operating environment falls within the specified temperature limits.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74HCT645 family of octal bus transceivers. It is designed for high-speed data transfer in digital systems. The device provides true logic operation and is suitable for general-purpose bus applications where isolation and direction control are necessary.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HCT645N

Buffers, Drivers, Receivers, Transceivers FAQ

What is the function of the DIR input?

The DIR input controls the direction of data transmission, determining whether data flows from the A bus to the B bus or vice versa.

How does the OE input affect the device?

When the OE input is high, the device is disabled, effectively isolating the A and B buses from each other.