74ABT573ADB,112

Overview

The SN74ABT573ADB,112 is an octal transparent D-type latch with 3-State outputs manufactured by NXP USA Inc. 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. The device features flow-through pinout configuration for easy microprocessor interface. Propagation delay (Dn to Qn) ranges from 2.8 ns to 4.8 ns at 5V. Output drive capabilities include -32 mA high-level and 64 mA low-level current.

Feature Summary

• Octal transparent latch design with independent Enable and Output Enable control gates
• Flow-through pinout configuration facilitating PC board layout and microprocessor interfacing
• High output drive capability designed for heavily loaded 3-State buses and MOS memories
• Power-up 3-State functionality ensuring safe initialization

Applications

• Interface between microprocessors and external memory or peripheral devices
• Driving heavily loaded 3-State buses in digital systems
• Data storage and buffering applications requiring transparent latch operation
• MOS memory address latching and data bus isolation

Procurement Notes

Verify the specific ordering suffix ',112' against manufacturer documentation to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the 20-pin plastic SO package variant matches your PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when a flow-through pinout is required for simplified PCB routing compared to standard octal latches. Consider the ABT series BiCMOS technology for superior speed and lower power dissipation compared to older ALS or LS families. Verify that the 3-State output buffers meet the electrical loading requirements of the target bus architecture.

Part Context

This part belongs to the 74ABT logic family, which utilizes BiCMOS technology to combine high-speed performance with low power consumption. The 74ABT573A is functionally identical to the 74ABT373 but offers a distinct pinout arrangement. It serves as a key component in digital logic circuits requiring parallel data storage and bus isolation.

Replacement Considerations

The 74ABT373 is functionally equivalent but lacks the flow-through pinout. Check for direct replacements like the 74ABT573AD from Texas Instruments if pin compatibility is not strictly required. Verify that any substitute maintains the same 3-State output characteristics and operating voltage range.