SN74ABT843NSR

Latches Overview

The SN74ABT843NSR is a 9-bit bus-interface D-type latch with 3-state outputs manufactured by Texas Instruments. It utilizes state-of-the-art EPIC-II BiCMOS design to significantly reduce power dissipation while providing high-drive outputs capable of driving highly capacitive or low-impedance loads. The device features a buffered output-enable input that places outputs in a high-impedance state during power-up and power-down conditions, preventing bus loading. It 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.

Latches Feature Summary

• Designed specifically for driving highly capacitive or relatively low-impedance loads
• Buffered output-enable input allows retention of stored data while outputs are in high-impedance state
• Outputs enter high-impedance state automatically 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 port implementations
• Bidirectional bus drivers
• Working registers

Latches Procurement Notes

Verify the specific package type associated with the NSR suffix against official documentation, as datasheets list DW (SOIC) and DB (SSOP) options. Confirm RoHS compliance status and lead finish details via the manufacturer's current packaging addendum. Ensure the ordering suffix matches the required tape-and-reel quantity and moisture sensitivity level for your assembly process.

Latches Selection Notes

Select this component when designing systems requiring 9-bit latching with high-drive capabilities for low-impedance loads. Consider the ABT logic series for its balance of speed and power consumption compared to standard TTL or CMOS families. Verify that the 4.5 V to 5.5 V supply voltage range aligns with your system's power architecture and that the -40°C to +85°C industrial temperature range meets environmental requirements.

Latches Part Context

This part belongs to the SN74ABT843 family of 9-bit bus-interface D-type latches. It is distinct from flip-flops like the SN74ABT374 due to its transparent latch behavior controlled by the Latch Enable (LE) signal rather than edge-triggering. The 'SN74' prefix indicates commercial grade operation, differentiating it from the military-grade SN54ABT843 which supports a wider temperature range.

Latches Replacement Considerations

Check for SN74ABT843DW or SN74ABT843DBR equivalents if the NSR suffix is unavailable. Verify pin compatibility and electrical characteristics against the original datasheet specifications before substitution.