特性
- Ten LVCMOS clock outputs:
- Five LVCMOS 125MHz Ethernet outputs
- Three LVCMOS 25MHz /125MHz Ethernet outputs
- One LVCMOS 24MHz USB output
- One LVCMOS 25MHz REF output
- QREF output; can be used to drive X1 of other devices, saving a crystal
- Selectable crystal input, or differential LVPECL input; test mode
- RMS Phase Jitter, 125MHz, integration range 12kHz – 20MHz: 0.75ps (typical)
- Cycle-to-Cycle jitter: 75ps (typical)
- Flexible voltage supply modes; supports legacy and future system requirements, minimizes power consumption
- Core voltage: (VDD, VDD_XTAL, VDDA) /Output voltage: (VDDO_A, VDDO_B, VDDO_C, VDDO_REF)Core / Output3.3V / 3.3V3.3V / 2.5V3.3V / 1.8V2.5V / 2.5V2.5V / 1.8V
- -40°C to +85°C ambient operating temperature
- Space-saving Pb-free, 48-pin 7 × 7 mm QFN; minimal board space
- Lead-free (RoHS 6) packaging
840NT4-01 - Block Diagram
描述
The 840NT4-01I is clock generator designed to provide ethernet and USB clocks for Freescale B4/ T4-based systems. The 840NT4-01I utilizes Renesas' FemtoClock NG® PLL technology to synthesize eight low phase-jitter Ethernet reference clocks. The clock generator also provides a 24MHz USB reference clock and a 25MHz reference output.
