74LVX161284MEA

Overview

The onsemi 74LVX161284MEA is a Low Voltage IEEE 161284 Translating Transceiver housed in a 48-Lead Small Shrink Outline Package (SSOP). It contains eight bidirectional data buffers and eleven control/status buffers to implement a full IEEE 1284 compliant interface. The device supports Extended Capabilities Port mode signaling standards for bidirectional parallel communications between personal computers and printing peripherals.

Feature Summary

• Translation capability allows outputs on the cable side to interface with 5V signals while maintaining low voltage operation on the peripheral side.
• All inputs feature hysteresis to provide enhanced noise margin during signal transmission.
• B and Y output resistance is optimized specifically to drive external cables effectively.
• Outputs remain in high impedance mode during power down to prevent interference.

Applications

• Extended Capabilities Port (ECP) mode implementations
• Bidirectional parallel communications between personal computers and printing peripherals
• IEEE 1284 Level 1 and Level 2 signaling standard interfaces

Procurement Notes

Verify the package type matches the specific application requirements, as this part number corresponds to the SSOP variant. Confirm that the system design accommodates the separate VCC-cable supply pin necessary for translating signals to higher voltages. Ensure input and output voltage levels align with the specified operating conditions before finalizing the bill of materials.

Selection Notes

Select this component when designing interfaces requiring translation between low voltage logic and 5V cable-side signals. It serves as a functional replacement for two 74ACT1284 devices, simplifying circuit design. Consider the flow-through pin configuration for easy interfacing between host and peripheral sides. Verify that the required I/O count fits within the eight bidirectional data buffers and eleven control/status buffers provided.

Part Context

This device belongs to the LVX logic family, designed for low voltage applications. It integrates translating transceiver functionality to bridge different voltage domains within IEEE 1284 compliant systems. The component consolidates multiple buffer functions into a single package, reducing board space compared to using discrete logic gates or older equivalent parts.

Replacement Considerations

The datasheet indicates it replaces the function of two 74ACT1284 devices. Verify compatibility with existing designs utilizing those parts, noting differences in voltage levels and package types.