ICS873991-147
ICS873991-147 is LOW VOLTAGE LVCMOS/LVPECL-TO LVPECL/ECL CLOCK GENERATOR manufactured by Integrated Device Technology.
DESCRIPTION
The ICS873991-147 is a low voltage, low skew, 3.3V IC S LVPECL or ECL Clock Generator and a member of Hi Per Clock S™ the Hi Per Clock S™ family of High Performance Clock Solutions from IDT. The ICS873991-147 has two selectable clock inputs. The PCLK, n PCLK pair can accept an LVPECL input and the REF_CLK pin can accept a LVCMOS or LVTTL input. This device has a fully integrated PLL along with frequency configurable outputs. An external feedback input and output regenerates clocks with “zero delay”. The four independent banks of outputs each have their own output dividers, which allow the device to generate a multitude of different bank frequency ratios and output-to-input frequency ratios. The output frequency range is 25MHz to 500MHz and the input frequency range is 6.25MHz to 125MHz. The PLL_SEL input can be used to bypass the PLL for test and system debug purposes. In bypass mode, the input clock is routed around the PLL and into the internal output dividers. The ICS873991-147 also has a SYNC output which can be used for system synchronization purposes. It monitors Bank A and Bank C outputs for coincident rising edges and signals a pulse per the timing diagrams in this data sheet. This feature is used primarily in applications where Bank A and Bank C are running at different frequencies, and is particularly useful when they are running at non-integer multiples of each other. Example Applications: 1. Line Card Multiplier: Multiply 19.44MHz from a back-plane to 77.76MHz on the line card ASIC and Serdes. 2. Zero Delay Buffer: Fan out up to thirteen 100MHz copies from a reference clock to multiple processing units on an embedded system.
FEATURES
- Fourteen differential 3.3V LVPECL/ECL outputs
- Selectable differential LVPECL or REF_CLK inputs
- PCLK, n PCLK can accept the following input levels: LVPECL, CML, SSTL
- REF_CLK accepts the following input levels: LVCMOS, LVTTL
- Input clock frequency range: 6.25MHz to 125MHz
- Maximum output frequency: 500MHz
- VCO...
