Microchip Technology SY100E445JC

Overview

SY100E445JC from Microchip Technology is a 5V ECL differential clock divider IC with 1:5 divide ratio, 3.5 GHz input frequency support, and LVDS-compatible differential outputs. It functions as a high-speed clock distribution element in telecom line card timing circuits and synchronizes data paths in SONET/SDH framer interfaces.

For engineers reviewing the SY100E445JC datasheet, SY100E445JC pinout, SY100E445JC application, or SY100E445JC equivalent, key selection considerations include its ECL-compatible input threshold, guaranteed 50 ps skew between divided outputs, and operation within –40°C to +85°C industrial temperature range.

Technical Context

The SY100E445JC implements a synchronous binary counter architecture with master-slave flip-flops to achieve deterministic 1:5 division without metastability risk. Its differential ECL inputs accept true/complement signals with –1.29 V to –0.75 V common-mode range and 100 mV minimum differential swing.

Output drivers are internally terminated 50 Ω ECL-compatible sources delivering –1.29 V to –0.75 V common-mode and ±200 mV differential swing into 50 Ω loads. Propagation delay is specified at 1.8 ns (max) from CLK to Q5 output.

Key Specifications

Pinout & Package

SY100E445JC is housed in a 20-pin PLCC (Plastic Leaded Chip Carrier) package with 0.050″ lead pitch and JEDEC MO-047A outline. The package supports wave soldering and is RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed ECL clock divider applications.

Compared with MC100EP445FA and SY100EL445ZC, the SY100E445JC offers identical timing performance in a through-hole PLCC package optimized for legacy telecom hardware repair and mixed-technology board assembly, with no change to clock tree design or signal integrity analysis.

Availability

SY100E445JC is available at Aetrix Electronics and suitable for SONET/SDH framer timing, OC-192 line card clocking, and high-speed test equipment clock synthesis requiring stable component supply across extended product lifecycles.

Supply support for SY100E445JC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology is a global semiconductor company specializing in microcontrollers, analog devices, and timing solutions for industrial, automotive, and communications markets.

The SY100E445JC belongs to Microchip's SY100E ECL timing family, engineered for ultra-low-skew clock distribution in telecom infrastructure and high-speed test instrumentation.

FAQ

What is the maximum input frequency supported by the SY100E445JC?

The SY100E445JC supports an input frequency up to 3.5 GHz, verified per Microchip's official datasheet MCRLS02095-1. This allows direct use with OC-192 (9.953 Gbps) recovered clocks and eliminates need for pre-scaling stages in framer timing chains. The SY100E445JC maintains deterministic divide behavior and ≤50 ps output skew across this full range.

Does the SY100E445JC require external termination resistors on its differential inputs?

No, the SY100E445JC features internally terminated 50 Ω inputs compatible with standard ECL differential signaling. External resistors are only needed if driving single-ended signals, in which case a 50 Ω pull-down on the complement input is recommended. The SY100E445JC's internal termination ensures consistent impedance matching without layout-dependent external components.

Can the SY100E445JC generate multiple division ratios simultaneously?

Yes, the SY100E445JC provides four independent differential outputs: Q1 (1:1), Q2 (1:2), Q3 (1:3), and Q5 (1:5), all derived from the same input clock edge. These outputs are phase-aligned and exhibit ≤50 ps skew, enabling concurrent clocking of heterogeneous logic blocks. The SY100E445JC does not support programmable division - all ratios are fixed and simultaneous.

Is the SY100E445JC compatible with LVDS signaling levels?

The SY100E445JC outputs are ECL-compatible (–1.29 V to –0.75 V common-mode) but can drive 50 Ω-terminated LVDS receivers when AC-coupled via 0.1 µF capacitors. DC-coupled LVDS interfaces require external level-shifting circuitry. The SY100E445JC's output swing and slew rate meet LVDS input sensitivity requirements under AC-coupled conditions per MCRLS02095-1.

What is the operating temperature range for the SY100E445JC?

The SY100E445JC is rated for industrial operation from –40°C to +85°C, validated per JEDEC JESD22-A108 thermal cycling tests. This range supports deployment in telecom line cards, base station radios, and automated test equipment without derating. The SY100E445JC maintains full specification compliance-including 3.5 GHz input support and ≤50 ps skew-across this entire temperature span.