SY89312VMGTR Microchip Integrated Circuit (Small Outline No-lead) In Stock
SY89312VMGTR is a high-speed PECL/ECL divide-by-2 clock generator IC from Microchip operating up to 4 GHz input frequency on 3.3 V or 5 V supply. Features differential PECL inputs and outputs with low-skew, low-jitter performance for demanding clock distribution networks. Housed in an 8-pin MLF (QFN) package for compact high-frequency timing circuit designs.
- Manufacturer
- Microchip
- Package
- Small Outline No-lead
- Pin Count
- 8
- Lifecycle
- TRANSFERRED
- Datasheet
- SY89312VMGTR Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4 GHz maximum input frequency with PECL/ECL differential I/O for ultra-high-speed divide-by-2 clock generation
- Dual supply operation at 3.3 V or 5 V, offering flexibility for mixed-voltage high-speed digital systems
- Low output skew and jitter enabling clean 2 GHz divided clock output suitable for SerDes and PLL reference clocks
- Differential input architecture with internal 75 Ω termination resistors for clean signal reception from PECL sources
- 8-pin MLF (QFN) package with exposed thermal pad for efficient heat dissipation in dense high-speed PCB layouts
Applications
The SY89312VMGTR is used in high-speed communications equipment such as Ethernet switches, optical transceivers, and SONET/SDH line cards that require a 2:1 frequency divider between a 4 GHz oscillator and downstream clock distribution logic. It also serves as a reference clock prescaler in PLL-based clock synthesizers and jitter cleaners for telecommunications backplanes operating at 2.5 Gbps and 10 Gbps data rates. Additionally, the device fits test and measurement instruments, high-speed ADC clocking circuits, and RF signal generator front-ends where a low-jitter divided PECL clock below 2 GHz is required.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | MLF |
| Reach Compliance Code | Compliant |
| Additional Feature | ALSO OPERATES AT 5V SUPPLY |
| Family | 89312 |
| Input Conditioning | DIFFERENTIAL |
| JESD-30 Code | S-XDSO-N8 |
| JESD-609 Code | e4 |
| Logic IC Type | LOW SKEW CLOCK DRIVER |
| Number of Functions | 1 |
| Number of True Outputs | 1 |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | SOLCC8,.08,20 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Propagation Delay (tpd) | 0.44ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 3.6V |
| Supply Voltage-Min (Vsup) | 3V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| fmax-Min | 4000MHz |
| Package | Small Outline No-lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum input clock frequency the SY89312VMGTR can divide and what is the output frequency?
The SY89312VMGTR accepts PECL differential clock inputs up to 4 GHz and outputs a divided-by-2 signal at up to 2 GHz with low jitter. This 2:1 frequency division makes it well suited as a prescaler between a 4 GHz VCO and 2 Gbps SerDes clock inputs in optical networking equipment.
Can the SY89312VMGTR operate from a 3.3 V supply in modern CMOS digital systems?
Yes, the SY89312VMGTR supports both 3.3 V and 5 V supply voltages, allowing direct integration into modern 3.3 V FPGA and ASIC clock distribution networks. The PECL outputs remain compatible with 3.3 V LVPECL receivers, simplifying interface design without requiring level-shifting components in the clock path.
Why is a differential PECL interface preferred over LVCMOS for distributing a 2 GHz divided clock?
Differential PECL signaling provides common-mode noise rejection of up to 20 dB compared to single-ended LVCMOS, which is critical at 2 GHz where even small noise injections cause cycle-to-cycle jitter that degrades bit error rates in 10 Gbps SerDes links. The SY89312VMGTR's differential I/O also maintains signal integrity over 5 cm to 15 cm PCB traces at these frequencies without termination issues that plague single-ended clocks.
What package does the SY89312VMGTR use and how does the exposed pad help thermal management?
The SY89312VMGTR is packaged in an 8-pin MLF (QFN) measuring approximately 2 mm × 3 mm with an exposed thermal pad on the bottom. The thermal pad, soldered directly to the PCB ground plane, reduces junction-to-board thermal resistance by 30% to 50% compared to an SOIC-8 package, helping manage heat dissipation when the device switches at 4 GHz input frequencies in compact telecom line cards.
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