Microchip Technology SY10EP08VKI-TR

Overview

SY10EP08VKI-TR from Micrel is a 2-input differential ECL/XLPECL XOR/XNOR gate operating at 3.3V or 5V supply, delivering >3 GHz maximum toggle frequency, 200 ps typical propagation delay, and dual complementary ECL outputs (Q, /Q). It serves high-speed logic decision and phase comparison in RF test equipment clock distribution paths.

For engineers reviewing the SY10EP08VKI-TR datasheet, SY10EP08VKI-TR pinout, SY10EP08VKI-TR application, or SY10EP08VKI-TR equivalent, key selection criteria include differential input voltage swing (150–1200 mV), output drive into 50Ω to VCC–2.0V, industrial temperature range (–40°C to +85°C), and MSOP-8 package compatibility with high-density PCB layouts.

Technical Context

The SY10EP08VKI-TR implements true differential ECL logic with internal pulldown on D inputs and pulldown/pullup on /D inputs, enabling robust noise immunity and rail-to-rail switching. Its Q output defaults LOW when inputs are open or at VEE, supporting fail-safe initialization in timing-critical systems.

It supports three ECL operating modes: NECL (VCC = 0V, VEE = –3.0V to –5.5V), 3.3V LVPECL (VCC = 3.3V, VEE = 0V), and 5.0V PECL (VCC = 5.0V, VEE = 0V), with all DC parameters scaling 1:1 with VCC and specified under 50Ω load to VCC–2.0V.

Key Specifications

Pinout & Package

SY10EP08VKI-TR is housed in an 8-pin MSOP (K8-1) package, 3.0 mm × 3.0 mm × 1.0 mm body, with exposed thermal pad for enhanced heat dissipation in high-current operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar differential XOR/XNOR logic applications.

Compared with MC100EP08DG and SN65EPT23DR, SY10EP08VKI-TR uniquely combines industrial temperature rating, dual XOR/XNOR outputs, and >3 GHz operation in MSOP-8 - making it the only option for compact, rugged, high-speed timing circuits requiring guaranteed performance across –40°C to +85°C.

Availability

SY10EP08VKI-TR is available at Aetrix Electronics and suitable for RF test equipment, optical transceiver timing recovery, and high-density FPGA I/O interface applications requiring stable component supply and long-term industrial-grade availability.

Supply support for SY10EP08VKI-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 semiconductor company specializing in high-performance analog, RF, and timing solutions before its acquisition by Microchip Technology in 2015.

The SY10EP08VKI-TR belongs to Micrel's ECL Pro™ family, engineered specifically for ultra-low-latency, high-frequency differential logic in test instrumentation, telecom infrastructure, and precision timing systems.

FAQ

What logic functions does the SY10EP08VKI-TR implement?

The SY10EP08VKI-TR implements both XOR and XNOR logic functions simultaneously using differential inputs (D0, /D0, D1, /D1) and complementary outputs (Q, /Q). Its truth table confirms four defined states: when both inputs match (LL or HH), Q is LOW and /Q is HIGH; when inputs differ (LH or HL), Q is HIGH and /Q is LOW. This dual-output capability eliminates the need for external inverters in phase-comparison circuits.

What supply configurations does the SY10EP08VKI-TR support?

The SY10EP08VKI-TR supports three distinct supply modes: NECL (VCC = 0V, VEE = –3.0V to –5.5V), 3.3V LVPECL (VCC = 3.3V, VEE = 0V), and 5.0V PECL (VCC = 5.0V, VEE = 0V). All DC parameters scale linearly with VCC per datasheet Note 2, and outputs are specified with 50Ω loads to VCC–2.0V - ensuring consistent performance across configurations without redesign.

Does the SY10EP08VKI-TR require external biasing resistors?

No, the SY10EP08VKI-TR integrates internal biasing: pulldown resistors on D inputs and pulldown + pullup on /D inputs. This eliminates external termination components typically needed for ECL logic, reducing PCB area and improving signal fidelity above 1 GHz. The internal design also ensures Q defaults LOW during power-up or floating inputs - enhancing system robustness.

What is the thermal performance of the SY10EP08VKI-TR in MSOP-8 package?

The SY10EP08VKI-TR in MSOP-8 (K8-1) exhibits θJA = 206°C/W in still air and 155°C/W at 500 lfpm airflow, with θJC = 39°C/W. These values are measured per JEDEC JESD51 standards and confirm suitability for thermally constrained industrial environments. The exposed thermal pad must be soldered to a copper plane for optimal heat transfer - critical when operating continuously near 38 mA supply current at +85°C.

How does the SY10EP08VKI-TR handle input floating conditions?

The SY10EP08VKI-TR is designed so that the Q output defaults LOW when inputs are open or driven to VEE, due to internal pulldown biasing on D pins and pulldown/pullup on /D pins. This fail-safe behavior prevents undefined logic states during power sequencing or signal loss - a key reliability feature in clock distribution networks where transient glitches could disrupt downstream PLLs or serializers.