MC10H642FNG

Overview

The MC10H642FNG is a clock driver designed for 68030 and 68040 microprocessors. It accepts TTL or PECL inputs and provides eight differential TTL outputs with a 2:8 input-to-output ratio. The device operates on a single +5.0 V supply (4.75V to 5.25V) and supports frequencies up to 100 MHz. It includes internal divide-by-two and divide-by-four stages, asynchronous reset, and meets strict part-to-part and within-part skew requirements. Packaged in a 28-PLCC surface-mount case.

Feature Summary

• Generates clocks for 68030/040 MPUs with guaranteed skew specifications
• Accepts both TTL and PECL (ECL referenced to +5.0 V) input sources
• Includes internal ÷2 and ÷4 frequency division stages
• Asynchronous reset forces all Q outputs LOW

Applications

• Clock generation for Motorola 68030 microprocessors
• Clock generation for Motorola 68040 microprocessors
• High-speed clock distribution systems requiring low skew

Procurement Notes

Verify the 'G' suffix availability if lead-free compliance is required, as the base MC10H642FNG may not be Pb-Free. Confirm package dimensions against CASE 776-02 standards. Check RoHS status documentation prior to procurement.

Selection Notes

Select this component when interfacing ECL/PECL sources to TTL loads for 68030/040 MPU architectures. Ensure power supply stability within ±5% to maintain duty cycle limits. Verify capacitive load constraints to meet propagation delay specifications at target frequencies.

Part Context

This device belongs to the MC10H series of high-speed ECL logic components manufactured by onsemi. It is functionally related to the MC100H642, which uses 100K levels referenced to +5.0 V, whereas the MC10H version is compatible with MECL 10H logic levels.

Replacement Considerations

MC100H642FNG serves as a functional equivalent using 100K logic levels. MC10H642FNR2 offers the same functionality in a tape-and-reel packaging format.