MC100EP142FAR2

Shift Registers Overview

The MC100EP142FAR2G is a 9-bit shift register from the onsemi 100 Series, designed for byte-parity applications. It supports serial/parallel data input and serial/parallel output with unidirectional shifting capability. The device operates in PECL mode (VCC = 3.0 V to 5.5 V, VEE = 0 V) or NECL mode (VCC = 0 V, VEE = -3.0 V to -5.5 V). Key electrical parameters include a typical shift frequency exceeding 2.8 GHz, propagation delays of 500 ps to 800 ps depending on temperature, and setup times of 50 ps to 100 ps. It features asynchronous master reset, dual clock inputs (CLK0/CLK1), and internal input pull-down/pull-up resistors.

Shift Registers Feature Summary

• Supports SHIFT and LOAD modes via SEL pin, enabling parallel data loading or serial shifting on positive clock edges.
• Includes asynchronous Master Reset (MR) that overrides clock inputs to zero all registers.
• Features open input default state and safety clamps on inputs for enhanced reliability.
• Contains temperature compensation within the 100 Series architecture.

Shift Registers Applications

• Byte-parity generation and checking circuits
• High-speed serial-to-parallel data conversion
• Parallel-to-serial data serialization

Shift Registers Procurement Notes

Verify the complete part number includes the 'R2G' suffix for tape and reel packaging and lead-free compliance. Confirm the specific logic family variant (MC10EP vs MC100EP) matches the required power supply configuration before ordering. Check current availability status as distribution may vary by region.

Shift Registers Selection Notes

Select this component for designs requiring high-frequency ECL shifting with byte-wide data handling. Ensure the system power supply aligns with either PECL (+3.3V/+5V) or NECL (-3.3V/-5V) requirements. Verify thermal management needs, as airflow >500 lfpm is recommended for stable operation at higher voltages.

Shift Registers Part Context

This device belongs to the MC10EP/MC100EP family of ECL logic devices manufactured by onsemi. The '100' prefix typically denotes compatibility with both 3.3V and 5V ECL standards, while the 'FAR2G' suffix indicates LQFP-32 packaging in a tape and reel format with RoHS compliance.

Shift Registers Replacement Considerations

MC100EP142FAG is a compatible alternative in LQFP-32 tray packaging.

Shift Registers FAQ

How does the SEL pin control the operating mode?

The SEL pin switches between SHIFT and LOAD modes. A LOW level enables LOAD mode where parallel inputs D0-D8 are captured, while a HIGH level enables SHIFT mode where data moves from Bit 0 to Bit 8 on the clock edge.

What is the function of the MR pin?

The Master Reset (MR) pin asynchronously resets all nine registers to zero when driven HIGH, overriding the CLK0 and CLK1 inputs regardless of their state.