Features
- 85Ω low-power push-pull HCSL outputs; eliminate 24 resistors, save 41mm² of area
- Pin-compatible with 9ZX21201 and 9ZXL1231; easy path to power and area savings
- Space-saving 64-pin VFQFPN package
- Fixed feedback path for 0 ps input-to-output delay
- 9 selectable SMBus addresses; multiple devices can share the same SMBus segment
- 12 OE# pins; hardware control of each output
- PLL or bypass mode; supports common and separate clock architectures
- Selectable PLL bandwidth; minimizes jitter peaking in downstream PLLs
- Spread spectrum compatible; tracks spreading input clock for low EMI
- -40 °C to +85 °C device available; supports demanding environmental applications
9ZXL1251 Block Diagram
Description
The 9ZXL1251 meets the demanding requirements of the Intel DB1200ZL specification, including the critical low-drift requirements of Intel CPUs. It is pin-compatible with the 9ZXL1231 and integrates 24 termination resistors, saving 41mm² board area.
Parameters
| Attributes | Value |
|---|---|
| Diff. Outputs | 12 |
| Diff. Output Signaling | LP-HCSL |
| Output Freq Range (MHz) | 25 - 150 |
| Diff. Inputs | 1 |
| Diff. Input Signaling | HCSL |
| Accepts Spread Spec Input | Yes |
| Power Consumption Typ (mW) | 445 |
| Supply Voltage (V) | 1.05 - 3.3 |
| Output Type | LP-HCSL |
| Diff. Termination Resistors | 24 |
| Package Area (mm²) | 81 |
| Battery Backup | No |
| Battery Seal | No |
| CPU Supervisory Function POR | No |
| Crystal Frequency Trimming | No |
| Frequency Out Pin | No |
| Inputs (#) | 1 |
| Input Freq (MHz) | 33 - 150 |
| Function | Buffer |
| Input Type | HCSL |
| Output Banks (#) | 1 |
| Core Voltage (V) | 3.3 |
| Output Voltage (V) | 0.7 |
| Product Category | Processor Clock Buffers |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| VFQFPN | 9.0 x 9.0 x 0.9 | 64 | 0.5 |
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