Microchip Technology SY10EL01ZC-TR

Overview

SY10EL01ZC-TR from Micrel is a 4-input ECL OR/NOR gate IC operating at –5.2 V VEE with 230 ps typical propagation delay, 225 ps typical output rise/fall time, and internal 75 kΩ input pull-down resistors. It serves as a high-speed logic combiner in clock distribution and data path steering circuits within telecom line cards.

For engineers reviewing the SY10EL01ZC-TR datasheet, SY10EL01ZC-TR pinout, SY10EL01ZC-TR application, or SY10EL01ZC-TR equivalent, key selection criteria include ECL-compatible input thresholds, dual complementary outputs (Q and Q), commercial temperature range (0°C to +70°C), SOIC-8 package compatibility, and DC/AC performance under –5.2 V VEE bias.

Technical Context

The SY10EL01ZC-TR implements true ECL logic with differential output structure (Q and Q) referenced to VEE, requiring VCC tied to GND and VEE biased at –4.75 V to –5.5 V. Its internal 75 kΩ pull-downs eliminate external biasing for unused inputs.

It delivers sub-300 ps propagation delay across temperature and supports high-bandwidth signal routing in backplane interconnects and serializer/deserializer timing paths where deterministic edge alignment is critical.

Key Specifications

Pinout & Package

8-pin SOIC (Z8-1) package with gull-wing leads, 1.27 mm pitch, 5.3 mm body width, and JEDEC MS-012 compliant outline.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ECL OR/NOR gate applications.

Compared with SY100EL01ZC-TR and MC100EL01DTG, the SY10EL01ZC-TR offers optimized cost and commercial-temp performance for telecom infrastructure where strict industrial rating or Pb-free finish is not mandated.

Availability

SY10EL01ZC-TR is available at Aetrix Electronics and suitable for telecom line cards, high-speed test equipment, backplane interconnects, and SerDes control circuits requiring stable component supply and long-term obsolescence management.

Supply support for SY10EL01ZC-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 timing, power, and interface solutions.

The SY10EL01ZC-TR belongs to Micrel's 10EL ECL logic family, designed specifically for ultra-low-latency signal routing in telecom, networking, and instrumentation systems demanding sub-nanosecond timing precision.

FAQ

What is the recommended power supply configuration for SY10EL01ZC-TR?

The SY10EL01ZC-TR requires VCC connected to system GND and VEE biased between –4.75 V and –5.5 V, with –5.2 V being the nominal operating point. A low-noise, well-decoupled negative supply is essential to maintain 230 ps propagation delay stability. The SY10EL01ZC-TR does not support positive VCC operation or CMOS-level interfacing without level translation.

Does SY10EL01ZC-TR support unused input termination internally?

Yes, the SY10EL01ZC-TR integrates 75 kΩ pull-down resistors on all four data inputs (D0–D3). This eliminates the need for external resistors when inputs are left unconnected, simplifying layout and reducing bill-of-materials count. These internal terminations are verified across the full commercial temperature range and do not affect the specified 230 ps tPD or 225 ps output transition times.

What is the function of the dual Q and Q outputs on SY10EL01ZC-TR?

The SY10EL01ZC-TR provides complementary outputs: Q delivers the OR function result, while Q delivers the NOR function result. Both outputs are electrically matched for skew control and can drive separate downstream paths simultaneously. This dual-output architecture allows single-gate implementation of both logic polarities without adding inverters, preserving timing margins in high-speed clock/data routing applications using the SY10EL01ZC-TR.

Is SY10EL01ZC-TR pin-compatible with other 8-pin ECL OR/NOR gates?

Yes, the SY10EL01ZC-TR uses the industry-standard 8-pin SOIC (Z8-1) footprint with identical pin assignments to SY100EL01ZC-TR and MC100EL01DTG. Pin functions - D0–D3, VCC, Q, VEE, Q - match across these parts, enabling direct PCB substitution where electrical specifications align. The SY10EL01ZC-TR maintains this mechanical compatibility while delivering optimized commercial-temp performance.

What is the maximum fan-out capability of SY10EL01ZC-TR?

The SY10EL01ZC-TR is rated for driving up to 10 standard ECL 10K loads (each ~50 Ω to VEE) while maintaining specified 230 ps propagation delay and 225 ps output transition times. Exceeding this fan-out increases capacitive loading, degrading edge rates and introducing measurable delay variation. For higher fan-out requirements, the SY100EL01ZC-TR variant is recommended due to its higher drive strength (20 mA IEE max vs. 17 mA for SY10EL01ZC-TR).