EEPROM PROGRAMMABLE PLL AND VCXO
The IDT5V19EE901 is a programmable clock generator intended for high performance data-communications, telecommunications, consumer, and networking applications. There are four internal PLLs, each individually programmable, allowing for four 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 IDT5V19EE901 is in-system, programmable and can be programmed through the use of I2C interface. An internal EEPROM allows the user to save and restore the configuration of the device without having to reprogram it on power-up.
Four internal PLLs
Internal non-volatile EEPROM
Fast (400kHz) mode I2C serial interface
Input frequency range: 1 MHz to 200 MHz
Output frequency range: 4.9 kHz to 500 MHz
Reference crystal input with programmable linear load capacitance
– Crystal frequency range: 8 MHz to 50 MHz (maximum crystal range is best effort)
Integrated VCXO
Each PLL has a 7-bit reference divider and a 12-bit feedback-divider
8-bit output-divider blocks
Fractional division capability on one PLL
Two of the PLLs support spread spectrum generation capability
I/O Standards:
– Outputs - 3.3 V LVTTL/ LVCMOS
– Outputs - LVPECL, LVDS and HCSL
– Inputs - 3.3 V LVTTL/ LVCMOS
Programmable slew rate control
Programmable loop bandwidth
Programmable output inversion to reduce bimodal jitter
Redundant clock inputs with glitchless auto and manual switchover options
