8A34045集成電路（IC）的時鐘發(fā)生器PLL頻率合成器規(guī)格書PDF中文資料

Features

? Close-in phase noise complies with Common Public Radio

Interface (CPRI) frequency synchronization requirements

? Supports all ITU-T G.709 frequencies

? Meets OTN jitter and wander requirements per ITU-T G.8251

? Two independent DPLL/DCO channels

? Each can act as a frequency synthesizer, jitter attenuator,

Digitally Controlled Oscillator (DCO), or Digital Phase Lock

Loop (DPLL)

? DPLL Digital Loop Filters (DLFs) are programmable with

cut-off frequencies from 1.1Hz to 22kHz

? Generate output frequencies that are independent of input

frequencies via a Fractional Output Divider (FOD)

? Each FOD supports output phase tuning with 50ps

resolution

? Six independent DCO channels

? Each DCO can act as an independent DCO or as a Satellite

Channel

? Satellite Channels are associated with a source DPLL or

DCO to increase the number of independently

programmable FODs and output stages available to the

source channel

? Each DCO generates an independent output frequency via a

Fractional Output Divider (FOD)

? 12 Differential / 24 LVCMOS outputs

? Frequencies from 0.5Hz to 1GHz (250MHz for LVCMOS)

? Jitter below 150fs RMS (10kHz to 20MHz)

? LVCMOS, LVDS, LVPECL, HCSL, CML, SSTL, and HSTL

output modes supported

? Differential output swing is selectable: 400mV / 650mV /

800mV / 910mV

? Independent output voltages of 3.3V, 2.5V, or 1.8V

? LVCMOS additionally supports 1.5V or 1.2V

? The clock phase of each output is individually programmable

in 1ns to 2ns steps with a total range of ±180°

? 2 differential / 4 single-ended clock inputs

? Support frequencies from 1kHz to 1GHz

? Any input can be mapped to any or all of the timing channels

? Redundant inputs frequency independent of each other

? Any input can be designated as external frame/sync pulse of

PPES (pulse per even second), 1 PPS (Pulse per Second),

5PPS, 10 PPS, 50Hz, 100Hz, 1 kHz, 2 kHz, 4kHz, and 8kHz

associated with a selectable reference clock input

? Per-input programmable phase offset of up to ±1.638 ?s in

50ps steps

? Reference monitors qualify/disqualify references depending on

LOS, activity, frequency monitoring, and/or LOS input pins

? Loss of Signal (LOS) input pins (via GPIOs) can be assigned

to any input clock reference

? Automatic reference selection state machines select the active

reference for each DPLL based on the reference monitors,

priority tables, revertive / non-revertive, and other

programmable settings

? System APLL operates from fundamental-mode crystal:

25MHz to 54MHz or from a crystal oscillator

? System DPLL accepts an XO, TCXO, or OCXO operating at

virtually any frequency from 1MHz to 150MHz

? DPLLs can be configured as DCOs to synthesize clocks under

the control of an external algorithm

? DCOs generate with frequency resolution less than

1.11 × 10-16

? Supports a 1MHz I2

C or 50MHz SPI serial processor port

? Can configure itself automatically after reset via:

? Internal customer definable One-Time Programmable (OTP)

memory with up to 16 different configurations

? Standard external I2

C EEPROM if serial port in I2

C mode

? 1149.1 JTAG Boundary Scan

? 10 × 10 mm 72-VFQFPN package