SY100HA643JY

Clock Buffers, Drivers Overview

The SY100HA643JY is a dual-supply, low-skew translating 1:8 clock driver from the Micrel H600 series. It converts ECL signals to TTL levels using a differential internal design and features an integrated latch for data control. The device operates with VEE between -4.2V and -5.5V and TTL supplies at +5.0V. Key electrical parameters include a maximum propagation delay of 3.1ns, within-device skew of 0.4ns, and a maximum input frequency of 160MHz. It provides eight TTL outputs capable of sourcing 48mA and includes a VBB reference output.

Clock Buffers, Drivers Feature Summary

• Octal ECL-to-TTL translation with 400ps within-device skew
• Integrated latch controlled by LEN and EN inputs
• Dual power supply architecture (ECL and TTL)
• Compatible with MC100H643 logic levels

Clock Buffers, Drivers Applications

• High-speed clock distribution networks
• ECL to TTL interface bridging in communication systems
• Data acquisition systems requiring precise timing

Clock Buffers, Drivers Procurement Notes

Verify component authenticity through authorized Microchip distributors. Confirm RoHS compliance status via the specific ordering suffix, as JY indicates Pb-Free packaging. Check datasheet revision history for any parameter updates before finalizing procurement specifications.

Clock Buffers, Drivers Selection Notes

Select this component when interfacing ECL sources with TTL loads requiring high drive current. Ensure power supply rails match the specified VEE range (-4.2V to -5.5V) and TTL voltage (+5.0V). Consider the 160MHz maximum frequency limit for signal integrity requirements.

Clock Buffers, Drivers Part Context

Part of the Precision Edge SY100HA series designed for high-performance clocking applications. It serves as a functional equivalent to the MC100H643, offering similar pinouts and electrical characteristics for direct replacement in existing designs.

Clock Buffers, Drivers Replacement Considerations

The MC100H643 is a confirmed compatible substitute with identical functionality. Verify package compatibility (PLCC-28) and ensure voltage levels align with system requirements before substitution.

Clock Buffers, Drivers FAQ

What is the function of the LEN and EN pins?

The LEN pin controls the latch transparency; when LOW, the latch is transparent. The EN pin forces all outputs LOW when HIGH, acting as a reset or enable control.

What is the maximum operating frequency?

The maximum input frequency is specified as 160MHz under standard load conditions (20pF).

How does the device handle ECL input levels?

It accepts differential ECL inputs (D and D_bar) with VIH ranging from -1165mV to -880mV and VIL from -1810mV to -1475mV.