Features
- 2 configurable low-drift I2O delays up to 2.9ns; maintain transport delay for various topologies
- LP-HCSL outputs with Zout = 85Ω; eliminate 48 resistors
- 9 selectable SMBus addresses; multiple devices can share the same SMBus segment
- Separate VDDIO for outputs; allows maximum power savings
- PLL or Bypass Mode; PLL can de-jitter incoming clock
- Hardware or software-selectable PLL BW; minimizes jitter peaking in downstream PLLs
- Spread spectrum compatible; tracks spreading input clock for EMI reduction
- SMBus interface; software can modify device settings without hardware changes
- 10mm x 10mm 72-QFN package; small board footprint
Description
The 9ZML1252E is a second-generation 2-input/12-output differential mux for Intel Purley and newer platforms. It exceeds the demanding DB1200ZL performance specifications and is backward compatible with the 9ZML1232B. The device utilizes Low Power HCSL-compatible outputs to reduce power consumption and termination resistors. It is suitable for PCI Express Gen 1-4 or QPI/UPI applications, and provides two configurable low-drift I2O settings, one for each input channel, to allow I2O tuning for various topologies.
Parameters
| Attributes | Value |
|---|---|
| Diff. Outputs | 12 |
| Diff. Output Signaling | LP-HCSL |
| Output Freq Range (MHz) | 1 - 400 |
| Diff. Inputs | 2 |
| Diff. Input Signaling | HCSL |
| Accepts Spread Spec Input | Yes |
| Power Consumption Typ (mW) | 482 |
| Supply Voltage (V) | 3.3 - 3.3 |
| Output Type | LP-HCSL |
| Diff. Termination Resistors | 24 |
| Package Area (mm²) | 100 |
| Battery Backup | No |
| Battery Seal | No |
| CPU Supervisory Function POR | No |
| Crystal Frequency Trimming | No |
| Frequency Out Pin | No |
| Inputs (#) | 2 |
| Input Freq (MHz) | 33 - 150 |
| Additive Phase Jitter Typ RMS (fs) | 109 |
| Function | Multiplexer |
| Input Type | HCSL |
| Output Banks (#) | 1 |
| Core Voltage (V) | 3.3 |
| Output Voltage (V) | 0.7 |
| Product Category | Clock Multiplexers, PCI Express Clocks, Processor Clock Buffers, Zero Delay Buffers |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| VFQFPN | 10.0 x 10.0 x 1.0 | 72 | 0.5 |
Renesas Boards & Kits
Evaluation Kit for 19-Output DB1900Z for PCIe Gen1-4 and QPI/UPI
The evaluation board is designed to help the customer evaluate the 9ZXL1951D. The device is programmable through an SMBus interface. The user guide details the board set and connection, as well as the companion Graphical User Interface (GUI) installation for communicating with the device. The... Read More
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