SN74ABT843DBRG4

Latches Overview

The SN74ABT843DBRG4 is a 9-bit bus-interface D-type latch with 3-state outputs manufactured by Texas Instruments. It utilizes state-of-the-art EPIC-IIB BiCMOS design to significantly reduce 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 free-air temperature range from -40°C to +85°C. It includes buffered output-enable (OE), preset (PRE), and clear (CLR) inputs, ensuring reliable data retention and bus isolation.

Latches Feature Summary

• Designed for driving highly capacitive or relatively low-impedance loads
• Provides true data at the outputs through nine transparent D-type latches
• 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
• Configuring I/O ports
• Bidirectional bus drivers
• Working registers

Latches Procurement Notes

Verify that the ordering suffix 'G4' corresponds to lead-free packaging and RoHS compliance as indicated in TI documentation. Confirm the package type matches the DB (SSOP) designation. Ensure the component meets the specified commercial temperature range requirements for your application environment before finalizing procurement.

Latches Selection Notes

Select this component when designing systems requiring 9-bit data storage with high-drive capabilities for low-impedance loads. Consider the EPIC-IIB BiCMOS technology for reduced power consumption compared to older logic families. Evaluate the need for 3-state outputs to facilitate bidirectional bus architectures without additional interface components.

Latches Part Context

This part belongs to the SN74ABT series of bus-interface latches produced by Texas Instruments. It is a catalog version of the military-grade SN54ABT843, characterized for operation over the extended commercial temperature range. The device is part of a broader family of ABT logic solutions designed for high-speed digital applications.

Latches Replacement Considerations

SN74ABT843DW

Latches FAQ

How does the device handle outputs during power-down?

The outputs remain in the high-impedance state while the device is powered down, preventing significant loading or driving of bus lines.

What is the purpose of tying OE to VCC through a pullup resistor?

Tying OE to VCC through a pullup resistor ensures the high-impedance state during power up or power down, protecting the circuit.