The 9FGL6251 is an intelligent buffer/clock generator tailored for single and dual-ported nVME SSDs. It supports Common (CC) and Independent Reference (IR) clocking architectures and is ideal for U.2 and M.2 form factors. The device is also useful in PCIe master/slave and clock multiplexing applications, with an internal clock generator as a third input channel.
For information regarding evaluation boards and material, please contact your local IDT sales representative.
Features
- Automatically detects presence or absence of input clocks and switches clock modes
- One open-drain CC_IR output indicates PCIe clock mode
- Integrated crystal option available (Q option)
- Two 100MHz Low-power HCSL (LP-HCSL) outputs; 85Ω output impedance
- Integrated terminations on DIF outputs save 8 resistors
- 201, 301 configurations for SRnS (IR) or CC architectures default to 0% SSC
- 202, 302 configurations for SRIS (IR) or CC architectures default to -0.5% SSC
- SMBus-selectable -0.25% SSC
- Choice of 25MHz or 33 1/3MHz reference clock
- REF clock output saves external XO
- 2.5V or 3.3V operating voltage (VDDREF is 1.8V)
- 4 × 4 mm 28-VQFP-N package with external crystal
- 4 × 4 mm 28-LGA package with optional internal crystal
- Easy AC-coupling to other logic families, see IDT application note AN-891
- For devices with 100Ω output impedance, see 9FGL6241