IDT74LVC16501APAG

Overview

The IDT74LVC16501APAG is a 3.3V CMOS 18-bit registered bus transceiver with 3-state outputs and 5V tolerant I/O, operating within an industrial temperature range of -40°C to +85°C. It utilizes dual metal CMOS technology for high-speed, low-power performance. The device features ±24mA output drivers and supports hot insertion. Supply voltage ranges from 2.7V to 3.6V, with typical static power consumption of 0.4μW. It operates at frequencies up to 150MHz.

Feature Summary

• Combines D-type latches and flip-flops to enable transparent, latched, and clocked data flow modes in both directions.
• Features high-output drivers capable of ±24mA to drive moderate to heavy loads while maintaining speed.
• All inputs, outputs, and I/O are 5V tolerant, allowing use as a translator in mixed 3.3V/5V systems.
• Includes hysteresis on all inputs to improve noise margin.

Applications

• 5V and 3.3V mixed voltage systems
• Data communication systems
• Telecommunication systems

Procurement Notes

Verify the package type matches the required footprint; 'PA' indicates TSSOP and 'PAG' indicates TSSOP-Green. Confirm the industrial temperature grade (-40°C to +85°C) aligns with system requirements. Ensure supply voltage constraints (2.7V to 3.6V) are met. Check for specific ordering suffixes if green packaging or specific tape-and-reel quantities are needed.

Selection Notes

Select this component for applications requiring bidirectional data transfer between 3.3V and 5V logic domains. The registered architecture allows for precise timing control via separate latch and clock inputs for each direction. High drive strength makes it suitable for buses with significant capacitive loading. Consider the 56-pin TSSOP package size for board space constraints.

Part Context

This device belongs to the LVC family of CMOS logic components, designed for low-voltage operation. It serves as a registered bus transceiver, distinct from unregistered variants by its ability to store data state. The 18-bit width accommodates wide data buses common in memory interfaces and high-speed data links.

Replacement Considerations

Check for pin-compatible alternatives within the same LVC family offering similar bit widths and drive strengths. Verify that any substitute maintains 5V tolerance and the required industrial temperature range. Ensure switching characteristics meet the system's maximum frequency requirements.

FAQ

How does the device handle data flow direction?

Data flow in each direction is independently controlled by dedicated output-enable (OEAB/OEBA), latch enable (LEAB/LEBA), and clock (CLKAB/CLKBA) inputs.

What is the function of the latch enable inputs?

When LEAB or LEBA is low, the respective bus data is stored in the internal latch/flip-flop upon the low-to-high transition of the corresponding clock input.

Is the device suitable for hot insertion?

Yes, the datasheet explicitly states that the device supports hot insertion.