SNJ54LVTH373FK

Overview

The SNJ54LVTH373FK is an octal transparent D-type latch from the LVT series, designed for 3.3-V VCC operation with TTL interface capability to 5-V systems. It features eight outputs with three-state control via a buffered OE input. The device supports mixed-mode signal operation and unregulated battery operation down to 2.7 V. Key electrical parameters include a supply voltage range of 2.7 V to 3.6 V, high-level output current of -24 mA, and low-level output current of 48 mA. Propagation delays are typically 2.6 ns at 3.3 V. It operates within a temperature range of -55°C to 125°C and includes bus hold functionality on data inputs.

Feature Summary

• Supports mixed-mode signal operation allowing 5-V input and output voltages during 3.3-V VCC operation
• Provides Ioff and power-up three-state support to enable safe hot insertion without damaging backflow currents
• Integrates active bus-hold circuitry on data inputs to maintain valid logic states without external pullup or pulldown resistors
• Offers latch-up performance exceeding 500 mA per JESD 17 standards

Applications

• Hot-insertion applications requiring power-up three-state behavior
• Mixed-mode signal environments interfacing 3.3-V logic with 5-V systems
• Unregulated battery-powered system designs operating down to 2.7 V
• Bus driver circuits utilizing three-state outputs to drive bus lines without interface components

Procurement Notes

Verify the specific ordering suffix FK corresponds to the Leadless Ceramic Chip Carrier (LCCC) package with 20 pins. Confirm the military-grade temperature range of -55°C to 125°C matches the application requirements. Ensure compatibility with the required supply voltage range of 2.7 V to 3.6 V. Check for any specific handling instructions related to the ceramic package type during assembly.

Selection Notes

Select this component when designing systems that require octal latching with three-state outputs in a 3.3-V environment. It is suitable for applications needing TTL compatibility with 5-V signals. Consider the LCCC package if hermetic sealing or specific thermal properties are required. Verify that the bus hold feature eliminates the need for external resistors in the design.

Part Context

This part belongs to the SN54LVTH373 family, which includes octal transparent D-type latches with three-state outputs. The SNJ prefix indicates a military-grade device, while the LVTH suffix denotes the Low Voltage TTL High-Speed technology. Other variants in the family include commercial versions like SN74LVTH373 and different package options such as SOIC, TSSOP, and CDIP.

Replacement Considerations

SNJ54LVTH373J (CDIP package), SNJ54LVTH373W (CFP package)