SN65LVDS100DGKRG4 - 2Gbps LVDS Repeater | TI | VSSOP-8
MPN: SN65LVDS100DGKRG4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.99 | $2.99 |
| 10 | $2.69 | $26.90 |
| 100 | $2.34 | $234.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.92 | $1,920.00 |
SN65LVDS100DGKRG4 Overview
A differential repeater is a signal-conditioning device placed in a high-speed serial link: it receives a degraded differential waveform, re-amplifies and re-times it through a receiver-driver pair, and launches a fresh LVDS signal onto the next segment. In the signal-integrity hierarchy it sits between a plain buffer and a full retimer, belonging to the broader family of interface ICs and signal buffers/repeaters.
Key features include signaling rates up to 2 Gbps, low 100 ps maximum part-to-part skew, receiver input threshold hysteresis for noise rejection, and a wide input common-mode range that accepts LVDS, PECL, and CML signal levels. TI positions it as a low-power alternative to the MC100EP16 ECL repeater, offering significant static current savings in LVDS mode.
The input receiver tolerates a broad common-mode range, so designers can AC-couple or DC-couple LVPECL and CML sources with simple biasing. The output drives a nominally 100-ohm differential transmission line with standard LVDS levels. The signal path is always-on: power is roughly the sum of receiver and driver currents, and the DGK package junction-to-ambient thermal resistance comfortably handles the sub-100 mW dissipation.
Typical applications include clock distribution and fan-out in telecom line cards, redriving LVDS signals across backplanes and cable interconnects, and translating PECL or CML outputs to LVDS-compatible receivers in test instrumentation and imaging systems.
For design, keep the 100-ohm differential impedance continuous through the device; place the part at the midpoint of lossy traces where the eye is still open enough to meet the receiver threshold. AC-coupled PECL inputs require appropriate bias resistors per the TI datasheet application section.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for SN65LVDS100DGKRG4 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SN65LVDT100DGKRG4
✅ Drop-In📋 Reference alternative (not in catalog)
SN65LVDS101DGKRG4
✅ Drop-In📋 Reference alternative (not in catalog)
SN65LVDT101DGKRG4
✅ Drop-In📋 Reference alternative (not in catalog)
SN65LVDS100DGKRG4 Specifications
| Function | Differential Repeater / Translator (LVDS/LVPECL/CML to LVDS) |
| Channels | 1 |
| Data Rate | Up to 2 Gbps |
| Total Jitter | 65 ps |
| Part-to-Part Skew | 100 ps (max) |
| Input Signal Types | LVDS, LVPECL, CML |
| Output Signal Type | LVDS |
| Receiver Input Hysteresis | Yes (threshold hysteresis) |
| Differential Line Impedance | 100 ohm |
| Supply Voltage | 3.3 V (nominal) |
| Package | 8-VSSOP (DGK) |
| Mounting Type | Surface Mount |
| RoHS Status | Lead free / RoHS Compliant |
| Category | Interface - Signal Buffers, Repeaters, Splitters |
| Low-Power Alternative To | MC100EP16 |
SN65LVDS100DGKRG4 Pin Configuration
| Pin 1 | RIN+ — Non-inverting receiver input (LVDS/LVPECL/CML) |
| Pin 2 | RIN- — Inverting receiver input (LVDS/LVPECL/CML) |
| Pin 3 | GND — Ground |
| Pin 4 | ROUT- — Inverting LVDS driver output |
| Pin 5 | ROUT+ — Non-inverting LVDS driver output |
| Pin 6 | VCC — 3.3 V power supply |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
Typical Applications
SN65LVDS100DGKRG4 is suitable for 6 applications: Clock Distribution and Fan-Out, Backplane LVDS Signal Redriving, LVPECL/CML to LVDS Level Translation, Test and Measurement Instrumentation, Imaging and Machine Vision Camera Links, Replacement for ECL Repeater Designs (MC100EP16).
Clock Distribution and Fan-Out
The SN65LVDS100DGKRG4 redrives high-frequency LVDS clocks in telecom and networking line cards where a single oscillator must reach many loads. Its 65 ps total jitter keeps added timing noise small enough for multi-GHz clock trees, and the 100 ps maximum part-to-part skew preserves alignment across parallel clock channels. Placed near the oscillator output, it launches fresh LVDS edges onto a 100-ohm differential clock line; the input hysteresis rejects crosstalk from adjacent noisy digital traces. Because it accepts CML and PECL oscillator outputs directly, no external level-shift stage is needed, simplifying the clock tree BOM.
Recommended
Backplane LVDS Signal Redriving
At 2 Gbps, LVDS signals degrade rapidly through backplane connectors and long controlled-impedance traces. Inserting the SN65LVDS100DGKRG4 at mid-span regenerates amplitude and edge rate before the eye closes below the receiver threshold. The always-on receiver-driver path adds only 65 ps of jitter, so a single redrive stage still leaves generous margin for a second segment. Designers should place the repeater where the eye is still open, keep the 100-ohm differential impedance continuous through the device, and locate it at the connector edge to minimize stub lengths on both segments.
Recommended
LVPECL/CML to LVDS Level Translation
The wide common-mode input range of the SN65LVDS100DGKRG4 accepts PECL and CML levels directly, making it a compact translator between legacy ECL-domain logic and LVDS receivers. For AC-coupled LVPECL sources, the TI datasheet application section specifies bias resistor networks that set the receiver input common-mode; after translation, the LVDS output drives a standard 100-ohm differential line. This one-chip approach replaces discrete resistor-divider translators that waste power and add skew, and the low quiescent power makes it practical even in densely populated transition stages of test instruments.
Recommended
Test and Measurement Instrumentation
Oscilloscopes, logic analyzers, and signal generators rely on low-jitter differential signaling between front-end modules and digital backbones. The SN65LVDS100DGKRG4 contributes only 65 ps of total jitter, preserving measurement timing accuracy, while its PECL/CML input flexibility accommodates the varied output standards of front-end ASICs and samplers. Its 8-VSSOP footprint fits the tight spacing typical of instrument PCAs, and RoHS compliance keeps instruments export-compliant. Use short matched-length differential routing and a 0.1 uF local decoupling capacitor to keep supply noise out of the regenerated edges.
Recommended
Imaging and Machine Vision Camera Links
Industrial camera interfaces transmit high-rate serialized pixel data over cable distances that exceed the raw reach of a single LVDS driver stage. The SN65LVDS100DGKRG4 placed at the camera or frame-grabber end redrives the serial stream; its input threshold hysteresis gives solid noise margin against cable-reflected artifacts, and 2 Gbps headroom covers common serializer rates. The DGK-8 package is small enough to fit inside camera-head enclosures. Designers should choose the SN65LVDT100 variant instead when they want the 110-ohm termination integrated on-chip to shorten the stub at the cable connector.
Recommended
Replacement for ECL Repeater Designs (MC100EP16)
TI explicitly positions the SN65LVDS100DGKRG4 as a low-power alternative to the MC100EP16 ECL repeater. Designs migrating away from PECL power budgets can adopt this LVDS repeater to cut static power dramatically while keeping 2 Gbps capability. Because PECL inputs are accepted directly, signals already in the PECL domain can enter the repeater without translation; the output side delivers LVDS suitable for modern ASIC and FPGA banks. This combination of input flexibility and reduced power makes it a natural drop-in concept at the block-diagram level for legacy ECL redistribution stages.
Recommended
Recommended Products Summary
Engineering reference data for SN65LVDS100DGKRG4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN65LVDT100DGKRG4 | SN65LVDS101DGKRG4 | SN65LVDT101DGKRG4 |
|---|---|---|---|---|
| Package | 8-VSSOP (DGK) | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same | 8-VSSOP (DGK) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Data Rate | Up to 2 Gbps | Up to 2 Gbps | Up to 2 Gbps | Up to 2 Gbps |
| Total Jitter | 65 ps | 65 ps | 65 ps | 65 ps |
| Input Standards | LVDS, LVPECL, CML | LVDS, LVPECL, CML | LVDS, LVPECL, CML | LVDS, LVPECL, CML |
| Output Standard | LVDS | LVDS | 3.3 V PECL | 3.3 V PECL |
| Integrated Termination | No (external 100 ohm) | Yes (110 ohm on-chip) | No (external) | Yes (110 ohm on-chip) |
Key Differentiators
- Standard LVDS output levels (vs SN65LVDS101DGKRG4)
- External termination flexibility (vs SN65LVDT100DGKRG4)
- Low power vs ECL solution (vs MC100EP16)
Design Notes
Maintain 100-ohm differential impedance from the source through the SN65LVDS100 to the load with no stubs. The always-on repeater should be placed where the incoming eye is still open - typically within the first loss segment after a cable or connector. Route RIN and ROUT pairs with matched intra-pair lengths and reference a solid ground plane; keep the loop area of the differential pairs minimal in the 8-VSSOP escape routing.
Decouple VCC with a 0.1 uF ceramic capacitor placed within a few millimeters of pin 6, plus one bulk capacitor per supply rail per board region. The signal path is always-on with no enable pin, so the repeater consumes power even with no signal applied - budget for it in low-power standby designs. Estimated: dissipation in LVDS mode is on the order of tens of milliwatts, well within the DGK package capability without a thermal pad or heatsink.
AC-coupled LVPECL inputs require the bias resistor network specified in the TI datasheet application section - omitting it leaves the receiver inputs floating outside the valid common-mode range and produces erratic output. Also, when substituting SN65LVDT100/101 variants that integrate 110-ohm termination, remove the external termination resistors to avoid double termination that halves the received swing.
Compliance Information
Distributor datasheet records list the part as Lead free / RoHS Compliant. REACH, halogen-free, and conflict-minerals status should be confirmed via TI product-page material declarations.
