74LCX16646MEAX

Overview

The onsemi 74LCX16646MEAX is a low-voltage 16-bit transceiver and register designed for 2.5V or 3.3V VCC applications, featuring capability to interface with 5V signal environments. It provides 16 channels organized as two elements of 8 bits each, utilizing a 56-pin SSOP surface mount package. Key electrical parameters include a low-level output current of 24mA, a high-level output current of -24mA, and a fast propagation delay of 7ns. The device operates within a supply voltage range of 2.0V to 3.6V and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Supports dual voltage domains by interfacing 2.5V/3.3V logic with 5V signal environments
• Integrates 16-bit bus transceiver functionality with register capability in a single component
• Provides high drive strength with 24mA output current capability for reliable signal transmission

Applications

• High-density data bus interfaces requiring level shifting between different voltage domains
• Memory systems connecting low-voltage controllers to 5V memory modules
• Industrial control systems requiring robust signal integrity across mixed-voltage networks

Procurement Notes

Verify the specific suffix MEAX against the manufacturer's current datasheet to confirm pinout and electrical characteristics match your design requirements. Note that this component may be classified as obsolete; ensure availability of qualified substitutes if long-term production support is required. Confirm RoHS compliance status directly with the supplier or official documentation before finalizing procurement decisions.

Selection Notes

Select this component when designing systems that require bidirectional data transfer between 3.3V or 2.5V logic cores and 5V peripherals. The 56-pin SSOP package offers a compact solution for space-constrained boards. Ensure the application does not exceed the maximum specified output current or operate outside the defined temperature range to maintain performance reliability.

Part Context

This part belongs to the LCX series of low-voltage CMOS logic devices, which are optimized for high-speed operation at reduced supply voltages. The LCX16646 variant specifically addresses the need for 16-bit wide data paths with direction control and storage capabilities, bridging the gap between standard logic families and specialized bus transceivers.

Replacement Considerations

Public confirmed substitute: SN74LVC16646ADLR (Texas Instruments). Verify pin compatibility and electrical specifications before substitution.