74AVCAH164245VRG4

Overview

The SN74AVCAH164245VRG4 is a 16-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs, manufactured by Texas Instruments. It operates within a supply voltage range of 1.4 V to 3.6 V for both ports (VCCA and VCCB). The device supports asynchronous communication between data buses with propagation delays ranging from 1.3 ns to 8.6 ns depending on voltage configurations. It features DOC circuitry for dynamic output impedance control, active bus-hold inputs, and Ioff support for partial-power-down mode. The component is housed in a 48-pin TVSOP package.

Feature Summary

• DOC circuitry dynamically adjusts output impedance to reduce noise without degrading speed
• Active bus-hold circuitry maintains valid logic levels on floating or unused data inputs
• Ioff circuitry disables outputs during power-down to prevent damaging backflow current
• Control input voltage thresholds are referenced to the VCCA supply rail

Applications

• Asynchronous communication between data buses operating at different voltage levels
• Partial-power-down applications requiring isolation during power cycles
• Mixed-voltage-mode data communications utilizing overvoltage-tolerant inputs
• Bidirectional translation between 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes

Procurement Notes

Verify the specific ordering suffix 'VRG4' corresponds to the TVSOP-48 package and tape-and-reel carrier configuration. Confirm that the RoHS-compliant status aligns with project environmental requirements. Ensure the -40°C to +85°C operating temperature range meets system thermal specifications. Cross-reference the manufacturer part number against current production status to confirm availability.

Selection Notes

Select this component when bidirectional level shifting between disparate low-voltage rails is required. The dual-supply architecture allows independent configuration of A and B ports. Consider the DOC feature for high-speed signals where signal integrity is critical. Verify that the 3-state outputs provide sufficient isolation for the target bus topology.

Part Context

This device belongs to the Texas Instruments Widebus family of logic ICs. It is designed specifically for noninverting bus transmission across multiple voltage domains. The SN74AVCAH164245 series provides a standardized interface for connecting microcontrollers, memory, and peripherals operating at varying logic levels.

Replacement Considerations

SN74AVCAH164245GR is a pin-compatible alternative available in a TSSOP-48 package.