SY605JC - 125MHz 255-Tap Programmable Delay | Microchip
MPN: SY605JC ✗ End of LifeSY605JC Overview
A programmable delay line is a clock-and-timing semiconductor that digitally selects an adjustable propagation delay between a trigger edge and an output edge. It belongs to the timing IC hierarchy: delay line IC → programmable timing IC → clock and timing IC → semiconductor. This makes the SY605JC useful where a circuit requires calibrated nanosecond offsets, retriggerable timing, or deterministic edge placement without redesigning the surrounding board.
Key features include a true 125 MHz retrigger rate, 255 programmable taps, 15 ps delay resolution, and timing accuracy of less than ±1 LSB. Differential TRIGGER and delay WRITE inputs support interface compatibility, while 10K H ECL compatibility supports high-speed digital timing environments. The reported typical power dissipation is 350 mW, making thermal design and power-plane return paths important in dense systems.
The SY605 architecture uses the Micrel-Synergys proprietary ASSET bipolar process, according to the manufacturer datasheet information supplied in the verified results. Its differential control inputs and fine delay granularity make it more appropriate than a general-purpose fixed delay line when the delay must be changed by a digital control word. The 28-LCC package preserves a conventional leaded footprint for through-hole or mixed-technology assemblies, but the exact pin names and electrical limits must be confirmed against the official datasheet before layout release.
Typical applications include high-speed clock calibration, digital timing alignment, pulse-position control, phase-shift generation, instrumentation, and ECL-compatible timing modules. The device is particularly relevant where a retriggerable event and programmable 15 ps increments simplify calibration or phase alignment.
When designing around the SY605JC, preserve the differential input topology and provide adequate decoupling and controlled return paths. Treat the 350 mW typical dissipation as a design input, then verify package thermal performance against the actual board copper and ambient temperature. Avoid assuming the 28-LCC package is interchangeable with a surface-mount package without a footprint and pinout review.
This page consolidates the verified distributor descriptions, timing specifications, package information, and replacement-search status for SY605JC. It separates confirmed values from unavailable details rather than estimating pin assignments, pricing, lifecycle, or electrical limits.
Drop-in alternatives for SY605JC — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
No drop-in alternatives available for this product.
Request AlternativesSY605JC Specifications
| Device Type | Write-programmable timing edge vernier |
| Maximum Retrigger Rate | 125 MHz |
| Number of Taps | 255 taps |
| Delay to First Tap | 4 ns |
| Programmable Delay Range | 4 ns to 40 ns |
| Delay Resolution | 15 ps |
| Timing Accuracy | Less than ±1 LSB |
| Number of Independent Delays | 1 |
| Trigger Input | Differential TRIGGER input |
| Write Input | Differential delay WRITE input |
| Logic Compatibility | 10K H ECL logic |
| Typical Power Dissipation | 350 mW |
| Process Technology | Micrel-Synergys proprietary ASSET bipolar process |
| Package | 28-LCC (J-Lead) |
| Packaging | Tube |
SY605JC 28-lcc (j-lead) Pin Configuration Guide
Pin configuration for SY605JC (28-lcc (j-lead) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for SY605JC.
Refer to the datasheet for full pin configuration.
Typical Applications
SY605JC is suitable for 6 applications: High-Speed Clock Phase Alignment, Pulse-Position Control, ECL Timing Instrumentation, Digital Timing Calibration, Retriggerable Timing Systems, Phase-Shift Generation.
High-Speed Clock Phase Alignment
The SY605JC fits clock-phase alignment because it provides 255 programmable taps across a verified 4 ns to 40 ns delay range, with 15 ps resolution. Place it in a clock-conditioning path where one edge must be shifted relative to another edge without changing the source clock frequency. The differential TRIGGER and WRITE inputs support controlled timing interfaces, while the 125 MHz retrigger rate accommodates high-speed event timing. The main design consideration is confirming the exact differential logic levels and pin mapping in the official datasheet before layout, because the supplied verified data does not include those details.
Recommended
Pulse-Position Control
The SY605JC is useful when a pulse must be positioned with fine digital control rather than a fixed analog delay. Its 15 ps delay resolution and less-than-±1-LSB timing accuracy provide a useful basis for calibrating pulse timing, while the 255 taps allow the delay to be selected over the verified 4 ns to 40 ns span. A controller can issue delay WRITE data after a differential TRIGGER event. Confirm the write-data format and pin assignment from the manufacturer documentation because those implementation details are not included in the supplied search snippets.
Recommended
ECL Timing Instrumentation
The verified 10K H ECL compatibility makes the SY605JC a candidate for instrumentation and timing modules built around high-speed ECL signals. Its differential control inputs and programmable delay can support edge placement, calibration paths, and repeatable timing experiments. The 350 mW typical power dissipation requires attention to board copper, return paths, and thermal conditions. Supply voltage and I/O thresholds are not specified in the verified material, so engineers must verify the electrical interface against the official SY605 datasheet before connecting it to ECL circuitry.
Recommended
Digital Timing Calibration
The SY605JC supports calibration workflows that require a digitally selected delay rather than a fixed delay element. Its 255 taps and 15 ps resolution allow fine adjustment, and the stated less-than-±1-LSB accuracy gives the calibration loop a clear target. A microcontroller or programmable logic device can control the delay WRITE input and measure the resulting output edge against a reference. The exact write encoding and pinout must be taken from the manufacturer datasheet; neither is available in the supplied verified snippets.
Recommended
Retriggerable Timing Systems
The SY605JC is appropriate for timing systems that must handle events arriving at up to the verified 125 MHz retrigger rate. The device can delay a subsequent edge relative to a trigger event and provide programmable timing behavior for pulse, clock, or calibration circuits. This capability is distinct from a static delay line: the control interface can select timing according to system state. Validate the maximum event rate in the final signal environment, including loading, return paths, and logic-level compatibility.
Recommended
Phase-Shift Generation
The SY605JC can generate a controlled phase shift by applying a selected delay to a timing edge. Its verified 15 ps resolution and 4 ns to 40 ns range are relevant to phase-shift calibration, waveform alignment, and synchronization experiments. The differential TRIGGER path can help preserve signal integrity in systems designed around differential timing, while the WRITE input allows the phase state to be adjusted digitally. Because the supplied data does not include pin names, supply limits, or output timing curves, those details must be verified before production release.
Recommended
Recommended Products Summary
Engineering reference data for SY605JC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Package | 28-LCC (J-Lead) |
| Brand | Microchip Technology |
| Device Type | Write-programmable timing edge vernier |
| Maximum Retrigger Rate | 125 MHz |
| Number of Taps | 255 taps |
| Delay Range | 4 ns to 40 ns |
| Delay Resolution | 15 ps |
| Timing Accuracy | Less than ±1 LSB |
| Independent Delay Channels | 1 |
| Logic Compatibility | 10K H ECL logic |
| Typical Power Dissipation | 350 mW |
Key Differentiators
- Fine digital timing adjustment (vs No verified drop-in alternative)
- High-speed retrigger operation (vs No verified drop-in alternative)
- Differential control architecture (vs No verified drop-in alternative)
- ECL-compatible interface (vs No verified drop-in alternative)
Design Notes
Treat the TRIGGER and WRITE paths as high-speed differential signals. Keep the routing short, preserve the intended pair geometry, provide a continuous return path, and place any required termination close to the device or source according to the system interface specification. The verified data confirms differential inputs but does not provide complete rise-time, impedance, or pin-level guidance, so these details must be taken from the official datasheet before finalizing layout.
The verified typical power dissipation is 350 mW. Use the 28-LCC footprint with adequate board copper and verify the temperature rise at the actual ambient temperature and airflow. Do not assume that a socket or a small prototype board represents production thermal performance. If the calculated dissipation is close to the device rating or the required ambient exceeds the verified operating range, reduce loading, improve heat spreading, or select another timing device.
The SY605JC uses a 28-LCC J-lead package, so PCB land patterns must be created from the official package drawing rather than inferred from an SOIC or surface-mount footprint. Confirm pin numbering, exposed or thermal connections, and mechanical tolerances from the manufacturer documentation. Place decoupling and timing components close to their associated pins, while keeping the 125 MHz signal path compact and away from unrelated switching nodes.
Do not substitute a generic programmable delay line based only on its delay range. A valid replacement must also match the 28-LCC J-lead footprint, pin mapping, differential TRIGGER and WRITE interface, 10K H ECL compatibility, 125 MHz retrigger behavior, and 15 ps resolution. Also do not rely on distributor promotional phrases as proof of current stock, price, or lifecycle status; confirm those commercial details as of 2026-10-23.
Compliance Information
The supplied verified results identify Microchip Technology as the manufacturer but do not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. Compliance fields remain unknown rather than assumed.