SY100EL52ZC - 5V ECL Diff Data/Clock D Flip-Flop | Microchip
Teilenummer: SYNERGY100EL52ZC ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $6.5 | $6,50 |
| 10 | $5.85 | $58,50 |
| 100 | $5.2 | $520,00 |
| 500 | $4.62 | $2.310,00 |
| 1.000 | $4.1 | $4.100,00 |
SYNERGY100EL52ZC Übersicht
What is an ECL D flip-flop? An ECL D flip-flop is a high-speed sequential logic element from the emitter-coupled logic family, a current-steering topology that avoids transistor saturation and therefore achieves far faster edge rates than TTL or CMOS counterparts. Within a system, an ECL D flip-flop typically performs high-speed retiming, clock-data alignment, frequency division, or pulse regeneration in serializer/deserializer (SerDes), fiber-optic transponder, and high-end test instrument designs. ECL logic occupies the very top of the digital logic hierarchy alongside silicon-germanium and current-mode-logic (CML) parts used in 40G/100G/400G datacom.
Key features include differential D data inputs with internal VBB reference generation, differential clock inputs that can be configured for either positive- or negative-edge triggering (EL52 supports negative-edge operation in addition to standard positive-edge), and an open-emitter output structure that allows flexible termination schemes. The open input clamping circuitry forces outputs to a defined state when inputs float to VEE, preventing oscillation. Operating supply voltages are VCC = 0V (ground) and VEE = -5.2V (or -4.5V), matching the legacy 10KH/100K ECL convention.
Architecturally, the SY100EL52 uses a master-slave flip-flop with differential clock pair sensing. Data enters the master when the clock is LOW and transfers to the slave on a positive clock transition. The complementary Q and /Q outputs are designed to drive 50-ohm terminated transmission lines, with both outputs available for differential signaling.
Typical applications include clock and data recovery (CDR) blocks, frequency-multiplication circuits, high-speed A/D and D/A converter interfaces, ATE (Automatic Test Equipment) pin electronics, and PIC-level instrumentation. Designers appreciate the EL52 family for its direct compatibility with legacy 10K/100K ECL designs in telecom infrastructure.
When designing with this device, engineer the layout for controlled-impedance differential traces and place 50-ohm termination as close to the outputs as possible. Maintain a tight ground reference plane under the package and use VEE-filtered decoupling at each supply pin to avoid pattern-dependent jitter. For the SOIC package, ensure the body is not the limiting thermal constraint at typical ECL biases. This page synthesizes Octopart pricing, Microchip/Micrel datasheet specifications, and practical design notes not found in the manufacturer datasheet.
Drop-in-Alternativen für SYNERGY100EL52ZC – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
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SY10EL52ZC
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SY100EL52ZCTR
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SY100EL52SC
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
SY100EL52SI
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MC100EL52DG
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SYNERGY100EL52ZC Grenzwerte & elektrische Eigenschaften
| Funktion | Differential Data, Differential Clock D Flip-Flop |
| Logic Family | 100EL (ECL) |
| Logic Base Number | 10052 |
| Marking Code | XEL52 |
| Supply Voltage Vcc | 0 V (ground) |
| Supply Voltage Vee | -4.5 V to -5.2 V |
| Operating Supply Voltage Max | 5 V (absolute max referenced) |
| Triggering Edge | Positive or Negative (selectable via clock polarity) |
| Data Inputs | Differential with internal VBB reference |
| Clock Inputs | Differential pair |
| Outputs | Q and /Q, differential emitter-follower (open emitter) |
| Gehäuse | 8-SOIC (Z suffix) |
| Montageart | Surface Mount |
| Lead-Free Process | Per Jotrin listing - Leaded Process Compatible: No |
| Peak Reflow | Per Jotrin listing - Peak Reflow Compatible (260 C): No |
| Input Clamp Diodes | Yes (clamps float to VEE to define outputs) |
SYNERGY100EL52ZC Pin-Konfiguration
| Pin 1 | D — Data input (non-inverting, differential pair with /D) |
| Pin 2 | /D — Inverting data input (differential pair with D) |
| Pin 3 | CLK — Clock input (non-inverting) |
| Pin 4 | /CLK — Inverting clock input (differential pair with CLK, enables negative-edge operation) |
| Pin 5 | VEE — Negative supply (-4.5V to -5.2V for 100K ECL) |
| Pin 6 | VCC — Positive supply (tied to ground in 100K ECL convention) |
| Pin 7 | Q — Data output (non-inverting, open emitter for 50-ohm termination) |
| Pin 8 | /Q — Inverting data output (open emitter, differential pair with Q) |
Typische Anwendungen
SYNERGY100EL52ZC ist geeignet für 6 Anwendungs: Clock and Data Recovery (CDR), Frequency Division / Prescaler, ATE / Test Equipment Pin Electronics, High-Speed A/D and D/A Converter Interface, Sonet / Fiber-Optic Transponder Logic, Legacy 10K/100K ECL Replacement.
Clock and Data Recovery (CDR)
The SY100EL52ZC's sub-500 ps typical propagation delay and sub-200 ps output transition time, paired with its differential clock input pair, make it ideal for clock-data retiming blocks in telecom and datacom receivers. Placed between the deserializer output and the input of an FPGA SERDES, the part re-times incoming data on either the positive or negative clock edge, removing amplitude-dependent jitter and reducing timing budget pressure on downstream logic. Compared to TTL or CMOS flip-flops, the 100K-ECL topology avoids transistor saturation so transitions remain inside the linear regime, which is essential when rebuilding a clean data eye after PCB or backplane distortion.
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Frequency Division / Prescaler
Wired as a divide-by-two prescaler by feeding the /Q output back to the D input, the SY100EL52ZC provides clean, high-frequency division up to several GHz, useful in microwave synthesizer LO chains and phase-locked loop feedback paths. The negative-edge capability of the differential clock input further allows construction of quadrature or divide-by-N counters by alternating edge polarity between stages. Per manufacturer datasheet DS20006066A, the master-slave architecture is fundamentally stable under feedback, and the open-emitter outputs allow easy AC-coupling into next-stage ECL gates.
Empfohlen
ATE / Test Equipment Pin Electronics
Automatic Test Equipment (ATE) pin electronics require very fast, deterministic switching between formats - a perfect role for the SY100EL52ZC. Its 100K-ECL interface, sub-200 ps output transitions, and matched differential Q//Q outputs drive 50-ohm DUT loads or comparators with minimal skew mismatch. In a pin-driver card, the SY100EL52ZC serves as the retiming element between a high-speed waveform source and the DUT, ensuring the data eye presented to the device-under-test is crisp regardless of upstream cable loss.
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High-Speed A/D and D/A Converter Interface
Bit transceivers and data demultiplex stages in high-speed ADCs and DACs (typically > 100 MSPS) often use ECL to minimize inter-symbol interference. The SY100EL52ZC demultiplexes the converter's high-rate outputs into two lower-rate parallel streams with known fixed skew, reducing downstream FPGA pin count and easing clock-domain crossing. Per the manufacturer datasheet, the part's differential clock supports direct ECL-level clocking from common ADC sample-clock generators.
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Sonet / Fiber-Optic Transponder Logic
SONET, SDH, and OTU transponder cards in telecom line equipment use ECL flip-flops for serial-to-parallel conversion, framing, and overhead processing. The SY100EL52ZC's 100K-ECL interface, fiber-friendly sub-200 ps outputs, and standard 8-SOIC footprint match legacy OptiLine designs where Microchip/Micrel parts are already proven. In an STM-16/OC-48 framer channel card, the SY100EL52ZC retimes recovered data before frame alignment.
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Legacy 10K/100K ECL Replacement
The SY100EL52ZC is the preferred upgrade for end-of-life 10K/100K ECL designs where the original ECL452-based flip-flop is being obsoleted by Microchip/Micrel (formerly Synergy, Semi-Lines, and others). Same-family, same-footprint direct replacement saves redesign time, and its compatibility with both 10H (with the SY10EL52ZC variant) and 100K (SY100EL52ZC) supply regimes lets engineers transition thermal characterization without PCB changes. Per manufacturer product page (https://www.microchip.com/en-us/product/SY100EL52), the part improves on E452 propagation delays while maintaining pin equivalence.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für SYNERGY100EL52ZC – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | SY10EL52ZC | SY100EL52ZCTR | SY100EL52SC | MC100EL52DG |
|---|---|---|---|---|---|
| Package | 8-SOIC (Z) | 8-SOIC (Z) - same | 8-SOIC (Z) - same | 8-SOIC (Z) - same | 8-SOIC (Z) - same |
| Brand | Microchip Technology (ex-Micrel) | Microchip Technology | Microchip Technology | Microchip Technology | onsemi |
| Logic Family | 100EL (100K ECL) | 10EL (10H ECL) | 100EL (100K ECL) | 100EL (100K ECL) | 100EL (100K ECL) |
| Function | Diff Data, Diff Clock D-FF | Diff Data, Diff Clock D-FF | Diff Data, Diff Clock D-FF | Diff Data, Diff Clock D-FF | Diff Data, Diff Clock D-FF |
| VEE Supply | -4.5V to -5.2V | -5.2V (typical 10H bias) | -4.5V to -5.2V | -4.5V to -5.2V | -4.5V to -5.2V |
| Data Inputs | Differential D, /D | Differential D, /D | Differential D, /D | Differential D, /D | Differential D, /D |
| Clock Inputs | Differential CLK, /CLK | Differential CLK, /CLK | Differential CLK, /CLK | Differential CLK, /CLK | Differential CLK, /CLK |
| Outputs | Differential Q, /Q (open emitter) | Differential Q, /Q (open emitter) | Differential Q, /Q (open emitter) | Differential Q, /Q (open emitter) | Differential Q, /Q (open emitter) |
Wichtigste Unterscheidungsmerkmale
- Faster propagation delay vs. legacy ECL452 (vs. ECL452 (legacy predecessor))
- Negative-edge triggering without external inverter (vs. Single-ended clocked flip-flops)
- Direct Micron/onsemi second-source footprint (vs. MC100EL52DG (onsemi))
- Open-emitter outputs enable flexible termination (vs. Non-ECL low-voltage flip-flops)
- Input clamps define output with floating inputs (vs. TTL/CMOS flip-flops)
Designhinweise
Route the differential D and differential clock pairs as tightly-coupled 50-ohm transmission lines using 4-8 mil trace width with matching spacing, on a continuous ground reference plane directly under the SOIC-8 body. Maintain within-pair skew below 1 ps to avoid converting common-mode noise into timing jitter; the 100K-ECL rise/fall times are sub-200 ps and any impedance discontinuity translates directly into pattern-dependent jitter. Place 51-ohm (or 50-ohm, depending on load) emitter-termination resistors within 2 mm of the Q and /Q pins and avoid stubs on the output traces.
Decouple the VEE pin (-5.2V or -4.5V) with a 0.1 uF X7R ceramic capacitor inside 2 mm of the pad, in parallel with a 10 uF tantalum or X5R bulk reservoir on the local rail. The 100K-ECL supply tolerance is tight (typically +/- 5%) because VEE directly shifts all logic thresholds, so a well-filtered VEE rail is required. Place a ferrite bead in series with each VEE pin if multiple ECL parts share the same rail to break up power plane resonance at GHz frequencies.
Do not leave D, /D, CLK, or /CLK pins floating - the input clamps force a defined default state when inputs reach VEE, but in high-speed operation this can still generate runt pulses. Always drive the differential inputs with a matched source, or use a fixed bias to keep the input stage in its linear region. When AC-coupling into the part, provide a pull-down or bias resistor network to bias the AC-coupled signal around the internal VBB reference, otherwise the threshold will shift with input amplitude and the output will exhibit asymmetric pulse width distortion.
Estimated: At -5.2V VEE with Q and /Q terminated to -2V via 50 ohms (classic ECL termination), typical quiescent current draw is 30-40 mA. Power dissipation is therefore 0.15-0.21 W - well below the SOIC-8 1W absolute maximum - so no thermal management beyond normal board copper is required. If the design pulls the outputs through higher currents (e.g., driving long on-board traces with 25-ohm termination), re-evaluate power dissipation against the datasheet thermal derating curve.
For multi-card ECL systems, the SY100EL52ZC outputs are open emitter and require a series or Thevenin pull-down at the receiver. Use Thevenin-equivalent 50-ohm termination to a -2V rail when the line length exceeds 5 cm, otherwise use a 100-ohm resistor across the differential pair at the receiver end. A controlled differential impedance of 100 ohms (40-ohm per side to VCC, 100-ohm termination) achieves the lowest BER for SONET/SDH-grade edges.
Compliance-Informationen
Jotrin listing reports Leaded Process Compatible: No and Peak Reflow Compatible (260 C): No, suggesting the original ZC variant may be supplied in leaded format; check Microchip's product page directly for the latest RoHS/REACH declaration and confirm with the latest Material Composition declaration. The SOIC-8 Z package is not AEC-Q100 qualified - this part is not designed for automotive AEC-Q100 applications.
