SY89645LK4G Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip SY89645LK4G is a low-skew LVTTL-to-LVDS fanout buffer with 1 input and up to 8 LVDS outputs operating at frequencies up to 650 MHz. It accepts an LVTTL clock source and distributes it as matched-impedance LVDS differential pairs in a 20-pin TSSOP package, minimizing clock skew in high-speed digital boards and FPGA-based designs.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SY89645LK4G Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.2300(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1-to-8 LVDS fanout buffer operating up to 650 MHz for high-speed clock distribution
- LVTTL single-ended input converted to low-noise LVDS differential outputs
- Ultra-low output-to-output skew for timing-critical multi-chip synchronization
- 4 inverted and 4 non-inverted LVDS output pairs for flexible clock tree topologies
- 20-pin TSSOP package with compact footprint for space-constrained high-speed PCBs
- 3.3 V supply compatible with standard FPGA and ASIC I/O banks
Applications
The SY89645LK4G is used in FPGA-based signal processing boards, high-speed test equipment, and backplane clock distribution circuits where a single reference clock must be fanout to 8 LVDS receivers with sub-100 ps skew. It is also used in telecommunications line cards and data acquisition systems that require a clean, low-jitter 650 MHz clock across multiple ADC, serializer, or DSP chips.
Specifications
| Manufacturer Package Code | TSSOP-20 |
| Factory Lead Time | 8Weeks |
| YTEOL | 24 |
| Family | 89645 |
| Input Conditioning | STANDARD |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Logic IC Type | LOW SKEW CLOCK DRIVER |
| Number of Functions | 1 |
| Number of Inverted Outputs | 4 |
| Number of True Outputs | 4 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TUBE |
| Propagation Delay (tpd) | 3ns |
| Qualification Status | Not Qualified |
| Same Edge Skew-Max (tskwd) | 0.04ns |
| Supply Voltage-Max (Vsup) | 3.465V |
| Supply Voltage-Min (Vsup) | 3.135V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| fmax-Min | 650MHz |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia, Philippines, Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What maximum clock frequency does SY89645LK4G support, and is it suitable for 500 MHz SERDES reference clocking?
The SY89645LK4G supports input frequencies up to 650 MHz, comfortably covering 500 MHz SERDES reference clock requirements. Its low-skew LVDS outputs maintain sub-100 ps output-to-output skew at these frequencies, which is critical for multi-lane serializer synchronization in telecom and data communication designs.
How does the LVTTL-to-LVDS conversion in SY89645LK4G simplify FPGA clock tree design?
Many FPGAs generate a single-ended LVTTL clock output, while internal and external high-speed interfaces require LVDS differential clocking. The SY89645LK4G accepts the LVTTL output and fans it out to up to 8 matched LVDS pairs, eliminating discrete single-to-differential converters and reducing clock tree component count by up to 8 chips.
What does having both inverted and non-inverted LVDS outputs offer in a clock distribution design?
The SY89645LK4G provides 4 non-inverted and 4 inverted LVDS output pairs, allowing designers to generate both 0° and 180° phased versions of the same clock without external inverters. This is useful in DDR memory interfaces or differential sampling circuits that require complementary clock phases for rising-edge and falling-edge triggered logic simultaneously.
With an 8-week lead time for SY89645LK4G, what procurement strategy minimizes supply risk for a high-speed board design?
Given the approximately 8-week factory lead time and a YTEOL of 24 indicating active long-term production, designers should plan purchase orders at least 10 to 12 weeks before board build start to cover engineering samples and production quantities. Maintaining 4 to 6 weeks of safety stock in forecast-driven programs reduces risk from demand spikes or freight delays.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $4.7900 | $4.79 |
| 25+ | $3.9800 | $99.50 |
| 100+ | $3.6200 | $362.00 |
| 1000+ | $3.4300 | $3430.00 |
| 10000+ | $3.2300 | $32300.00 |
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