SN74ABT843DW

Latches Overview

The SN74ABT843DW is a 9-bit bus-interface D-type latch with 3-state outputs manufactured by Texas Instruments. It utilizes EPIC-IIB BiCMOS design for reduced power dissipation and features high-drive outputs capable of -32 mA IOH and 64 mA IOL. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. Typical propagation delay is 6.3 ns at VCC = 5 V, with typical VOLP (output ground bounce) less than 1 V.

Latches Feature Summary

• Designed specifically for driving highly capacitive or relatively low-impedance loads
• Outputs enter high-impedance state during power-up and power-down conditions
• Latch-Up performance exceeds 500 mA per JEDEC Standard JESD-17

Latches Applications

• Implementing buffer registers
• I/O ports
• Bidirectional bus drivers
• Working registers

Latches Procurement Notes

Verify the specific package variant against the datasheet, as the SN74ABT843 series includes DB, DW, NT, and other options. Confirm that the procurement matches the catalog status and RoHS compliance details listed in the manufacturer's documentation. Ensure the ordering suffix corresponds to the required packaging format.

Latches Selection Notes

Select this component when nine transparent D-type latches are required for bus interface applications. The high-drive capability allows direct connection to bus lines without external pullup components. Verify that the operating temperature range and supply voltage requirements align with the system specifications.

Latches Part Context

This part belongs to the SN74ABT logic family, which employs EPIC-II BiCMOS technology. The family provides significant reductions in power dissipation compared to older technologies while maintaining high-speed performance suitable for modern digital systems requiring reliable data storage and transfer.

Latches Replacement Considerations

SN74ABT843DBR

Latches FAQ

How does the device handle the high-impedance state during power transitions?

The outputs remain in the high-impedance state during power-up and power-down conditions to prevent loading or driving the bus lines significantly.

What is the function of the OE input regarding internal operations?

The buffered output-enable (OE) input places outputs in a high-impedance state but does not affect the internal operations of the latch, allowing data retention or entry while outputs are disabled.