Microchip Technology SY10EL01ZG-TR

Overview

SY10EL01ZG-TR from Micrel is a 4-input ECL OR/NOR gate with 230ps typical propagation delay, –5.2V VEE supply rating, and internal 75kΩ input pull-down resistors, housed in an 8-pin SOIC (Z8-1) package for industrial-temperature operation. It serves as a high-speed logic combiner in clock distribution, data path steering, and bus arbitration circuits.

For engineers reviewing the SY10EL01ZG-TR datasheet, SY10EL01ZG-TR pinout, SY10EL01ZG-TR application, or SY10EL01ZG-TR equivalent, key selection factors include its ECL-compatible differential output swing, industrial-grade –40°C to +85°C operation, Pb-free NiPdAu lead finish, and verified 230ps propagation delay under VEE = –5.2V conditions.

Technical Context

The SY10EL01ZG-TR implements true ECL logic with complementary OR/NOR outputs on a single die, operating with VEE referenced to –5.2V and VCC tied to GND. Its internal 75kΩ pull-downs eliminate external biasing for unused inputs, simplifying board layout in high-density timing systems.

Designed for AC-coupled signal paths, it delivers 225ps typical rise/fall times (20%–80%) and supports >1GHz small-signal bandwidth. The device requires termination to –2V at Q outputs for proper logic level restoration in backplane or point-to-point interconnects.

Key Specifications

Pinout & Package

8-pin SOIC (Z8-1), 0.150" body width, Pb-free NiPdAu lead finish, industrial temperature grade.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SY100EL01ZG-TR and MC100EL01DTG, the SY10EL01ZG-TR offers optimal balance of speed, power (14mA IEE), and cost for mid-complexity ECL logic trees where 230ps delay suffices and load capacitance stays below 2.5pF.

Availability

SY10EL01ZG-TR is available at Aetrix Electronics and suitable for base station clock distribution, FPGA configuration steering, and industrial PLC backplane arbitration requiring stable component supply across extended product lifecycles.

Supply support for SY10EL01ZG-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 SY10EL01ZG-TR belongs to Micrel's SY10/100EL ECL logic family, engineered for sub-nanosecond timing-critical functions in telecom infrastructure, test instrumentation, and industrial control systems.

FAQ

What is the recommended termination for SY10EL01ZG-TR outputs?

The SY10EL01ZG-TR Q and Q̅ outputs require termination to –2V using a 50Ω resistor to that reference voltage. This establishes correct ECL logic thresholds (VOH ≈ –0.9V, VOL ≈ –1.7V) and prevents signal reflections on controlled-impedance lines. Do not terminate to GND or VEE, as this violates the device's output stage biasing requirements and causes invalid logic states.

Does SY10EL01ZG-TR support PECL or LVDS interfaces?

No, SY10EL01ZG-TR is strictly an ECL device and does not support PECL or LVDS signaling. It operates with VEE = –5.2V and VCC = GND, producing differential outputs centered near –1.3V. PECL requires VCC = +3.3V or +5V with outputs referenced to VCC–2V, while LVDS uses 350mV differential swing across 100Ω. Interfacing SY10EL01ZG-TR with PECL/LVDS systems requires level-shifting circuitry.

Can unused inputs on SY10EL01ZG-TR be left floating?

No, unused inputs on SY10EL01ZG-TR must not be left floating. Although the device integrates 75kΩ internal pull-down resistors to VEE on D0–D3, these provide only weak biasing. For robust noise immunity and guaranteed logic LOW state, unused inputs should be actively tied to VEE (–5.2V) or terminated through a 50Ω resistor to VEE in high-noise environments such as RF-dense base station chassis.

What is the maximum allowable VEE voltage range for SY10EL01ZG-TR?

The SY10EL01ZG-TR is specified for VEE between –4.75V and –5.5V across the industrial temperature range. Operation outside this range-especially above –4.75V-degrades noise margin and increases propagation delay variation. At –4.2V, the device may fail to meet AC specs; at –5.6V, internal junction stress risks long-term reliability loss. Always regulate VEE within ±0.25V of –5.2V for optimal SY10EL01ZG-TR performance.

Is SY10EL01ZG-TR pin-compatible with SY100EL01ZG-TR?

Yes, SY10EL01ZG-TR and SY100EL01ZG-TR share identical 8-pin SOIC (Z8-1) packaging and pinout: D0–D3, VCC, Q, VEE, Q̅. Both devices accept the same PCB footprint and solder profile. However, SY100EL01ZG-TR draws higher supply current (up to 20mA vs. 17mA) and exhibits slightly slower worst-case propagation delay (350ps vs. 330ps), so timing-critical designs must verify slack with the specific variant used.