74LVCH16646APAG

Overview

The 74LVCH16646APAG is a 16-bit bus transceiver and register manufactured by Renesas Electronics Corporation. It operates within a supply voltage range of 2.7 V to 3.6 V and features 3-state outputs with 5.0 V tolerant I/O capabilities. The device provides high drive currents of 24 mA for both high and low states. It utilizes advanced dual metal CMOS technology for high-speed, low-power performance. The component is housed in a 56-BSSOP package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates 16-bit bus transceiver and register functionality using advanced dual metal CMOS technology.
• Features 5.0 V tolerant I/O pins allowing direct interfacing with 5 V systems while powered at 3.3 V.
• Includes bus-hold circuitry to maintain stable logic levels on floating inputs.

Applications

• High-density data acquisition systems
• Memory mapping applications
• Control circuits requiring level shifting between 3.3 V and 5 V domains

Procurement Notes

Verify the specific package variant, as the APAG suffix typically denotes a BSSOP-56 package. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Ensure the source document explicitly lists this part number to avoid confusion with similar LVCH series components. Check for any recent product change notices regarding manufacturing sites or material composition updates.

Selection Notes

Select this component when a combined transceiver and register function is required for 16-bit data paths. It is suitable for designs needing 5 V tolerance on I/O lines without external level shifters. Consider the 24 mA output drive capability for driving moderate capacitive loads. Verify that the 56-pin package fits the available PCB footprint constraints.

Part Context

This device belongs to the Renesas 74LVCH16646A family of 3.3 V CMOS logic devices. It is designed for applications requiring high speed and low power consumption. The LVCH series offers improved performance over standard LVC devices while maintaining compatibility with legacy 74-series pinouts and functions.

Replacement Considerations

Check for direct pin-to-pin replacements within the same LVCH family. Verify if alternative manufacturers offer equivalent 16-bit bus transceivers with 5.0 V tolerance and similar drive strengths. Ensure functional equivalence regarding bus-hold features and propagation delays before substitution.

FAQ

What is the purpose of the bus-hold feature in this device?

Bus-hold circuitry maintains the last known logic state on the inputs, preventing floating signals and reducing noise susceptibility when the bus is not actively driven.

Can this device interface directly with 5 V logic systems?

Yes, the I/O pins are 5.0 V tolerant, allowing safe connection to 5 V systems even when the device is powered by a 3.3 V supply.