Microchip Technology SY10EL07ZI

Overview

SY10EL07ZI from Micrel is an industrial-grade 2-input ECL XOR/XNOR gate with 260 ps typical propagation delay, 225 ps typical output rise/fall time (20%–80%), and internal 75 kΩ input pull-down resistors. It operates from –4.75 V to –5.5 V V_EE, uses dual power supplies (V_CC = GND), and is used in high-speed clock/data path logic in telecom line cards and test equipment.

For engineers reviewing the SY10EL07ZI datasheet, SY10EL07ZI pinout, SY10EL07ZI application, or SY10EL07ZI equivalent, key selection criteria include propagation delay stability across –40°C to +85°C, ECL-compatible differential input thresholds, dual complementary outputs, and SOIC-8 packaging with Sn-Pb lead finish.

Technical Context

The SY10EL07ZI implements true ECL logic with emitter-coupled transistors, supporting both XOR and XNOR functions simultaneously on complementary Q and Q̅ outputs. Its internal 75 kΩ pull-downs ensure defined logic states on D0/D1 inputs when un-driven, eliminating need for external termination in point-to-point configurations.

Designed for AC-coupled operation, it requires V_EE = –4.75 V to –5.5 V and V_CC = GND, with DC input voltage range referenced to V_EE. Output swing is fully compatible with standard ECL-10K family interfaces, enabling direct interconnection without level-shifting.

Key Specifications

Pinout & Package

8-pin SOIC package (Z8-1, .150" wide body) with Sn-Pb lead finish; RoHS-compliant Pb-free variants available as SY10EL07ZG.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ECL logic gate applications.

Compared with MC100EL07DTG and SN65EPT23DR, the SY10EL07ZI uniquely delivers industrial-temperature ECL performance with integrated pull-downs-enabling direct replacement in legacy telecom and defense hardware without layout or biasing changes.

Availability

SY10EL07ZI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial control, and defense electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SY10EL07ZI 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 founded in 1978, acquired by Microchip Technology in 2015. Known for high-performance ECL, PECL, and LVDS interface products.

The SY10EL07ZI belongs to Micrel's SY10/100EL logic family, designed specifically for ultra-low-skew, high-frequency digital signal routing in telecom, instrumentation, and military/aerospace systems.

FAQ

What is the maximum operating frequency supported by the SY10EL07ZI?

The SY10EL07ZI does not specify a maximum clock frequency in its datasheet because it is a combinational logic gate-not a clocked device. However, its 260 ps typical propagation delay and 225 ps output edge rates support reliable operation in data paths with effective toggle rates exceeding 1.5 GHz, provided proper ECL termination and layout practices are followed for the SY10EL07ZI.

Does the SY10EL07ZI require external pull-up or pull-down resistors on its inputs?

No. The SY10EL07ZI integrates 75 kΩ internal pull-down resistors on both D0 and D1 inputs, ensuring a defined LOW state when inputs are unconnected. This eliminates the need for external biasing components in most point-to-point ECL configurations, simplifying design and reducing bill-of-materials cost for the SY10EL07ZI.

Can the SY10EL07ZI be used with a single positive supply voltage?

No. The SY10EL07ZI is a true ECL device requiring dual supplies: V_EE = –4.75 V to –5.5 V and V_CC = GND. It cannot operate with a single positive supply. Attempting to power the SY10EL07ZI with only +3.3 V or +5 V will result in functional failure and potential damage due to incorrect biasing of internal emitter-coupled transistors.

What is the meaning of "ZI" in the part number SY10EL07ZI?

The "ZI" suffix in SY10EL07ZI denotes the industrial temperature grade (–40°C to +85°C) and Z8-1 SOIC package with Sn-Pb lead finish. It distinguishes this variant from commercial-grade versions like SY10EL07ZC and Pb-free variants like SY10EL07ZG. All functional specifications apply strictly to the SY10EL07ZI as tested and guaranteed over that temperature range.

Are the Q and Q̅ outputs of the SY10EL07ZI truly complementary and matched in delay?

Yes. The SY10EL07ZI provides simultaneously generated, actively driven Q (XOR) and Q̅ (XNOR) outputs with tightly matched propagation delays-typical skew between them is < 15 ps across temperature and voltage. This matching is critical for differential signaling and high-speed sampling applications using the SY10EL07ZI.