SN74AHCT245N

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AHCT245N is an octal bus transceiver with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-compatible inputs. The device supports asynchronous bidirectional data communication between two buses, controlled by direction (DIR) and output enable (OE) pins. It utilizes CMOS technology and provides latch-up performance exceeding 250 mA per JESD 17. The component is housed in a 20-pin PDIP package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• TTL-voltage compatible inputs
• Bidirectional asynchronous data transmission
• Three-state output isolation capability

Buffers, Drivers, Receivers, Transceivers Applications

• Enable or disable digital signals
• Hold signals during controller reset
• Switch debounce circuits

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'N' corresponds to the 20-pin PDIP package configuration. Confirm RoHS compliance status and lead finish details against the latest manufacturer orderable addendum. Ensure the operating temperature range requirements align with the specified -40°C to 125°C rating for this package variant before finalizing procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when interfacing systems requiring translation from 3.3 V logic levels up to 5 V operation. The TTL-compatible input thresholds facilitate direct connection to legacy logic families. Consider the PDIP package constraints regarding thermal resistance and board space compared to surface-mount alternatives like SOIC or TSSOP variants.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SNx4AHCT245 family of octal bus transceivers. It shares functional characteristics with other packages such as SOIC (DW), SSOP (DB), and VQFN (RGY). The 'N' suffix specifically designates the plastic dual-in-line package format, distinguishing it from surface-mount options within the same logical product line.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HCT245N

Buffers, Drivers, Receivers, Transceivers FAQ

How does the OE pin affect bus isolation?

When the Output Enable (OE) input is high, the device enters a high-impedance state, effectively isolating the A and B buses regardless of the DIR signal level.

What is the function of the DIR pin?

The Direction (DIR) control input determines the data flow direction. A low level directs data from B to A, while a high level directs data from A to B, provided OE is low.