IDT5V9888PFGI Datasheet, PDF
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- Description DESCRIPTION: The IDT5V9888 is a programmable clock generator intended for high performance data-communications, telecommunications, consumer, and networking applications. There are three internal PLLs, each individually programmable, allowing for three unique non-integer-related frequencies. The frequencies are generated from a single reference clock. The reference clock can come from one of the two redundant clock inputs. A glitchless automatic or manual switchover function allows any one of the redundant clocks to be selected during normal operation. The IDT5V9888 can be programmed through the use of the I2C or JTAG interfaces. The programming interface enables the device to be pro grammed when it is in normal operation or what is commonly known as in system programmable. An internal EEPROM allows the user to save and restore the configuration of the device without having to reprogram it on power-up. JTAG boundary scan is also implemented. Each of the three PLLs has an 8-bit pre-scaler and a 12-bit feedback divider. This allows the user to generate three unique non-integer-related frequencies. The PLL loop bandwidth is programmable to allow the user to tailor the PLL response to the application. For instance, the user can tune the PLL parameters to minimize jitter generation or to maximize jitter attenuation. Spread spectrum generation and fractional divides are allowed on two of the PLLs. There are 10-bit post dividers on five of the six output banks. Two of the six output banks are configurable to be LVTTL, LVPECL, or LVDS. The other four output banks are LVTTL. The outputs are connected to the PLLs via the switch matrix. The switch matrix allows the user to route the PLL outputs to any output bank. This feature can be used to simplify and optimize the board layout. In addition, each outputs slew rate and enable/disable function can be programmed.FEATURES: • Three internal PLLs • Internal non-volatile EEPROM • JTAG and FAST mode I2C serial interfaces • Input Frequency Ranges: 1MHz to 400MHz • Output Frequency Ranges: − LVTTL: up to 200MHz − LVPECL/ LVDS: up to 500MHz • Reference Crystal Input with programmable oscillator gain and programmable linear load capacitance − Crystal Frequency Range: 8MHz to 50MHz • Each PLL has an 8-bit pre-scaler and a 12-bit feedback-divider • 10-bit post-divider blocks • Fractional Dividers • Two of the PLLs support Spread Spectrum Generation capability • I/O Standards: − Outputs - 3.3V LVTTL/ LVCMOS, LVPECL, and LVDS − Inputs - 3.3V LVTTL/ LVCMOS • Programmable Slew Rate Control • Programmable Loop Bandwidth Settings • Programmable output inversion to reduce bimodal jitter • Redundant clock inputs with glitchless auto and manual switchover options • JTAG Boundary Scan • Individual output enable/disable • Power-down mode • 3.3V VDD • Available in TQFP and VFQFPN packages
- Part No. IDT5V9888PFGI
- Manufacturer 瑞萨-Renesas
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