Microchip Technology SY10E445JZ-TR

Overview

SY10E445JZ-TR from Micrel is a 4-bit ECL serial-to-parallel converter with differential clock and data inputs, supporting up to 2.5 Gb/s NRZ data rates, on-chip ÷4 and ÷8 clock outputs, and MODE-selectable 4-bit/8-bit operation in a 28-pin PLCC package. It serves as a high-speed demultiplexer in optical interconnect and backplane receiver systems.

For engineers reviewing the SY10E445JZ-TR datasheet, SY10E445JZ-TR pinout, SY10E445JZ-TR application, or SY10E445JZ-TR equivalent, key selection criteria include its 2.5 Gb/s NRZ capability, differential CLK/SIN/SOUT signaling, VBB reference for single-ended use, asynchronous SYNC-controlled bit alignment, and compatibility with MC10E/100E445 timing and logic families.

Technical Context

The SY10E445JZ-TR implements a synchronous 4-bit shift register with dual differential serial inputs (SINA/SINB), selectable via SEL, and generates parallel Q0–Q3 outputs aligned to a differential CLK input. Its internal ÷4 and ÷8 dividers derive CL/4 and CL/8 outputs directly from CLK, enabling system-level clock distribution without external dividers.

Conversion mode is controlled by MODE: LOW enables native 4-bit conversion; HIGH enables cascaded 8-bit operation using two devices, where the second device's SOUT feeds the first's SINB, requiring careful timing budgeting due to cumulative tPD (CLK→SOUT = 1150 ps max) and negative setup time (tS = –250 ps).

Key Specifications

Pinout & Package

SY10E445JZ-TR is housed in a 28-pin Plastic Leaded Chip Carrier (PLCC, J28-1) package with lead-free matte-tin finish and Pb-free bar-line indicator. Pin 1 is located at the top-left corner of the top view, with pins numbered counterclockwise.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial-to-parallel conversion applications.

Compared with MC100E445FN and SY100E445JZTR, SY10E445JZ-TR offers optimal power efficiency and signal integrity for standard 2.5 Gb/s 4-bit demux applications, with guaranteed performance at 2.5 Gb/s under worst-case commercial conditions and full Pb-free compliance for new designs.

Availability

SY10E445JZ-TR is available at Aetrix Electronics and suitable for optical transceiver receivers, backplane demultiplexers, high-speed test equipment, and SerDes link analyzers requiring stable component supply and long-term lifecycle support.

Supply support for SY10E445JZ-TR 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

Micrel, Inc. was a U.S.-based analog and mixed-signal semiconductor company acquired by Microchip Technology in 2015, known for high-performance ECL, PECL, and LVDS interface ICs.

The SY10E445JZ-TR belongs to Micrel's 10E ECL logic family, designed specifically for ultra-high-speed serial data conditioning, demultiplexing, and clock distribution in telecom, datacom, and test instrumentation.

FAQ

What is the maximum guaranteed data rate for SY10E445JZ-TR?

The SY10E445JZ-TR is guaranteed to operate at 2.5 Gb/s NRZ under commercial temperature conditions (0°C to +85°C) with input clock amplitudes of 150 mV to 400 mV. This rating is validated per AC Characteristic Table fMAX parameter and applies to both standalone 4-bit and cascaded 8-bit configurations when timing margins are observed.

How does the SYNC input affect bit alignment in SY10E445JZ-TR?

The SYNC input in SY10E445JZ-TR provides asynchronous bit-phase control: each pulse shifts the conversion start point left by one bit (e.g., from Qn to Qn−1). This enables dynamic deskew without halting data flow, and is especially useful in systems with variable propagation delays across serial lanes or after hot-plug events.

Can SY10E445JZ-TR be used with single-ended inputs?

Yes - SY10E445JZ-TR supports single-ended operation via its VBB pin, which provides a –1.3 V reference for the input differential amplifier. For single-ended use, tie VBB to the inverting input and bypass it with a 0.01 µF capacitor; this configuration is recommended for clock rates below 500 MHz.

What is the purpose of the MODE pin in SY10E445JZ-TR?

The MODE pin in SY10E445JZ-TR selects conversion depth: LOW (or open) configures the device as a standalone 4-bit serial-to-parallel converter; HIGH enables cascaded 8-bit operation using two SY10E445JZ-TR devices, where the SOUT of the first feeds the SINB of the second.

Is SY10E445JZ-TR pin-compatible with MC10E445?

Yes - SY10E445JZ-TR is fully pin-compatible and functionally equivalent to Motorola MC10E445, including identical pinout, timing, DC specifications, and logic behavior. It is explicitly stated in the datasheet as "fully compatible" and intended as a drop-in replacement in legacy designs.