MC10E446FNG

Overview

The MC10E446FNG is a 5V/EnECL integrated 4-bit parallel to serial data converter manufactured by onsemi. It operates in PECL mode with VCC ranging from 4.2 V to 5.7 V and VEE at 0 V, or NECL mode with VCC at 0 V and VEE from -4.2 V to -5.7 V. The device supports NRZ data rates up to 1.3 Gb/s and features internal divide-by-4 and divide-by-8 clocks. It includes differential clock and serial inputs, an asynchronous SYNC reset, and a MODE pin for cascading two devices into an 8-bit configuration. Packaged in a PLCC-28 (Case 776), it contains 525 transistors and operates within a temperature range of 0°C to +85°C.

Feature Summary

• Integrated divide-by-4 and divide-by-8 clock generation for flexible conversion schemes
• Asynchronous data synchronization via dedicated SYNC input pin
• MODE pin selection allows expansion from 4-bit to 8-bit parallel-to-serial conversion
• Internal VBB reference voltage output for single-ended input applications

Applications

• High-speed parallel to serial data conversion in communication systems
• Cascaded 8-bit multiplexer architectures using dual E446 devices
• Transmission and receiving paths for high-speed serial data interfaces

Procurement Notes

Verify the specific ordering suffix to confirm package type and environmental compliance. The 'FN' suffix indicates a standard PLCC-28 package, while 'FNG' denotes a lead-free variant. Confirm that the supply voltage levels match the required PECL or NECL operating modes before integration. Ensure proper termination networks are designed according to application note AND8020/D for signal integrity.

Selection Notes

Select the MC10E446 when a compact 4-bit parallel-to-serial solution is required with integrated clock division capabilities. Choose this component over discrete logic if board space is limited and internal ÷4/÷8 clocks simplify the design. Consider the MC100E446 variant if temperature compensation is necessary for wider thermal stability requirements beyond the standard 10 series specifications.

Part Context

This component belongs to the MC10E/100E446 family of EnECL converters. It is functionally paired with the MC10E445 serial-to-parallel converter to establish complete high-speed serial data transmission and reception links. The device architecture supports both standalone 4-bit operation and cascaded 8-bit configurations, making it suitable for modular interface designs.

Replacement Considerations

The MC100E446 serves as a direct functional replacement offering improved temperature compensation. Verify pin compatibility and power supply requirements when substituting between the 10 and 100 series variants.