140 Mhz, 0 To 85?ƣ Operation 3.3-v Phase-lock Loop Clock Driver - Hitachi Semiconductor

The HD74CDCF2510B is a high-performance, low-skew, low-jitter, phase-lock loop Clock Driver It uses a phase-lock loop (PLL) to precisely align, in both frequency and phase, the feedback (FBOUT) output to the Clock (CLK) input signal. It is specifically designed for use with synchronous DRAMs The HD74CDCF2510B operates at 3.3 V VCC and is designed to drive up to five Clock loads per output. Bank of outputs provide ten low-skew, low-jitter copies of the input Clock Output signal duty cycles are adjusted to 50 percent independent of the duty cycle at the input Clock Bank of outputs CAN be enabled or disabled via the control (G) inputs. When the G inputs are high, the outputs Switch in phase and frequency with CLK; when the G inputs are low, the outputs are disabled to the logic-low state. Unlike many products containing PLLs the HD74CDCF2510B does not require external RC networks. The loop Filter for the PLL is included on-chip, minimizing component count, board space, and cost. Because it is based on PLL circuitry, HD74CDCF2510B requires a stabilization time to achieve phase lock of the feedback signal to the reference signal. This stabilization time is required, following power up and application of a fixed-frequency, fixed-phase signal at CLK, as well as following any changes to the PLL reference or feedback signals. The PLL CAN be bypassed for test purposes by strapping AVCC to ground. By Renesas Technology
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HD74CDCF2510B Pinout, Pinouts
HD74CDCF2510B pinout,Pin out
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