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ZL30251 Datasheet

3-Output Any-to-Any Clock Multiplier and Frequency Synthesizer ICs

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Register Map: Section 6.2
Features
Four Input Clocks
One crystal/CMOS input
Two differential/CMOS inputs
One single-ended/CMOS input
Any input frequency from 9.72MHz to 1250MHz
(9.72MHz to 300MHz for CMOS)
Clock selection by pin or register control
Low-Jitter Fractional-N APLL and 3 Outputs
Any output frequency from <1Hz to 1035MHz
High-resolution fractional frequency conversion
with 0ppm error
Easy-to-configure, encapsulated design
requires no external VCXO or loop filter
components
Each output has independent dividers
Output jitter as low as 0.16ps RMS (12kHz-
20MHz integration band)
Outputs are CML or 2xCMOS, can interface to
LVDS, LVPECL, HSTL, SSTL and HCSL
In 2xCMOS mode, the P and N pins can be
different frequencies (e.g. 125MHz and 25MHz)
Per-output supply pin with CMOS output
voltages from 1.5V to 3.3V
ZL30250, ZL30251
4-Input, 3-Output Any-to-Any Clock
Multiplier and Frequency Synthesizer ICs
Data Sheet
March 2015
Ordering Information
ZL30250LDG1
ZL30250LDF1
ZL30251LDG1
ZL30251LDF1
32 Pin QFN
32 Pin QFN
32 Pin QFN
32 Pin QFN
Trays
Tape and Reel
Trays
Tape and Reel
Matte Tin
Package size: 5 x 5 mm
-40C to +85C
Precise output alignment circuitry and per-
output phase adjustment
Per-output enable/disable and glitchless
start/stop (stop high or low)
General Features
Automatic self-configuration at power-up from
external (ZL30250) or internal (ZL30251)
EEPROM; up to four configs, pin-selectable
SPI or I2C processor Interface
Numerically controlled oscillator mode
Spread-spectrum modulation mode
Tiny 5x5mm QFN package
Easy-to-use evaluation software
Applications
Frequency conversion and frequency synthesis in
a wide variety of equipment types
IC1P, IC1N
HSDIV1
APLL
HSDIV1
DIV1
IC2P, IC2N
HSDIV2
~3.7 to 4.2GHz,
IC3P/GPIO3
XA
xtal
HSDIV3
NCO
SS
Fractional-N
Figure 6
HSDIV2
DIV2
DIV3
XB driver ×2
Microprocessor Port
(SPI or I2C Serial)
and HW Control and Status Pins
OC1P, OC1N
VDDO1
OC2P, OC2N
VDDO2
OC3P, OC3N
VDDO3
Figure 1 - Functional Block Diagram
1
Microsemi Confidential
Copyright 2015. Microsemi Corporation. All Rights Reserved.


  Microsemi Electronic Components Datasheet  

ZL30251 Datasheet

3-Output Any-to-Any Clock Multiplier and Frequency Synthesizer ICs

No Preview Available !

ZL30250, ZL30251
Data Sheet
Table of Contents
1. APPLICATION EXAMPLES .......................................................................................................... 5
2. DETAILED FEATURES................................................................................................................. 5
2.1 INPUT CLOCK FEATURES .............................................................................................................. 5
2.2 APLL FEATURES .......................................................................................................................... 5
2.3 OUTPUT CLOCK FEATURES ........................................................................................................... 5
2.4 GENERAL FEATURES .................................................................................................................... 5
2.5 EVALUATION SOFTWARE............................................................................................................... 6
3. PIN DIAGRAM............................................................................................................................... 6
4. PIN DESCRIPTIONS ..................................................................................................................... 7
5. FUNCTIONAL DESCRIPTION ...................................................................................................... 9
5.1 DEVICE IDENTIFICATION ................................................................................................................ 9
5.2 PIN-CONTROLLED AUTOMATIC CONFIGURATION AT RESET ............................................................. 9
5.2.1 ZL30250External EEPROM or No EEPROM ..................................................................................... 9
5.2.2 ZL30251Internal EEPROM............................................................................................................... 10
5.3 LOCAL OSCILLATOR OR CRYSTAL ................................................................................................ 10
5.3.1 External Oscillator ................................................................................................................................ 10
5.3.2 External Crystal and On-Chip Driver Circuit ........................................................................................ 11
5.3.3 Clock Doubler....................................................................................................................................... 12
5.3.4 Ring Oscillator (for System Start-Up)................................................................................................... 12
5.4 INPUT SIGNAL FORMAT CONFIGURATION...................................................................................... 12
5.5 NUMERICALLY CONTROLLED OSCILLATOR / SPREAD SPECTRUM BLOCK (NCO/SS)........................ 13
5.5.1 Numerically Controlled Oscillator (NCO) Mode ................................................................................... 13
5.5.2 Spread-Spectrum Modulation Mode .................................................................................................... 13
5.6 APLL CONFIGURATION ............................................................................................................... 14
5.6.1 APLL Input Selection and Frequency .................................................................................................. 14
5.6.2 APLL Output Frequency....................................................................................................................... 14
5.6.3 APLL Phase Adjustment ...................................................................................................................... 15
5.7 OUTPUT CLOCK CONFIGURATION ................................................................................................ 15
5.7.1 Output Enable, Signal Format, Voltage and Interfacing ...................................................................... 16
5.7.2 Output Frequency Configuration .......................................................................................................... 16
5.7.3 Output Duty Cycle Adjustment ............................................................................................................. 17
5.7.4 Output Phase Adjustment and Phase Alignment................................................................................. 17
5.7.4.1 Phase Adjustment......................................................................................................................... 17
5.7.4.2 Phase Alignment, Output-to-Output.............................................................................................. 18
5.7.4.3 Phase Alignment, Input-to-Output ................................................................................................ 19
5.7.5 Output Clock Start and Stop ................................................................................................................ 19
5.7.6 A-to-B Phase Offset Measurement ...................................................................................................... 20
5.8 MICROPROCESSOR INTERFACE ................................................................................................... 23
5.8.1 SPI Slave ............................................................................................................................................. 23
5.8.2 SPI Master (ZL30250 Only) ................................................................................................................. 25
5.8.3 I2C Slave .............................................................................................................................................. 26
5.9 INTERRUPT LOGIC ...................................................................................................................... 28
5.10 RESET LOGIC.......................................................................................................................... 29
5.11 POWER-SUPPLY CONSIDERATIONS .......................................................................................... 29
5.12 AUTO-CONFIGURATION FROM EEPROM .................................................................................. 29
5.12.1 Generating Device Configurations ....................................................................................................... 29
5.12.2 Direct EEPROM Write Mode (ZL30251 Only) ..................................................................................... 29
5.12.3 Holding Other Devices in Reset During Auto-Configuration ................................................................ 30
2
Microsemi Confidential


Part Number ZL30251
Description 3-Output Any-to-Any Clock Multiplier and Frequency Synthesizer ICs
Maker Microsemi
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ZL30251 Datasheet PDF






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