nXTAL SEL XTAL OUT FemtoClocks LVCMOS/Crystal-to-3.3V 843004 LVPECL Frequency Synthesizer DATA SHEET General Description Features The 843004 is a 4 output LVPECL synthesizer optimized to Four 3.3Vdifferential LVPECL output pairs generate Fibre Channel reference clock frequencies and is a Selectable crystal oscillator interface TM member of the HiPerClocks family of high performance clock or LVCMOS/LVTTL single-ended clock input solutions from IDT. Using a 26.5625MHz 18pF parallel resonant Supports the following output frequencies: 212.5MHz, crystal, the following frequencies can be generated based on the 2 187.5MHz, 159.375MHz, 156.25MHz, 106.25MHz, 53.125MHz frequency select pins (F SEL 1:0 ): 212.5MHz, 187.5MHz, VCO range: 560MHz 680MHz 159.375MHz, 156.25, 106.25MHz, and 53.125MHz. The 843004 rd RMS phase jitter 212.5MHz, using a 26.5625MHz crystal uses IDTs 3 generation low phase noise VCO technology and (637kHz 10MHz): 0.72ps (typical) can achieve 1ps or lower typical rms phase jitter, easily meeting Offset Noise Power Fibre Channel jitter requirements. The 843004 is packaged in a 100Hz ................ -95.0 dBc/Hz small 24-pin TSSOP package. 1kHz .................. -114.3 dBc/Hz 10kHz ................ -123.8 dBc/Hz 100kHz .............. -124.6 dBc/Hz Full 3.3V supply mode -30C to 85C ambient operating temperature Available in lead-free (RoHS 6) package Table 3A. Bank A Frequency Table Inputs Input Frequency (MHz) F SEL1 F SEL0 M Div. Value N Div. Value M/N Div. Value Output Frequency (MHz) 26.5625 0 0 24 3 8 212.5 26.5625 0 1 24 4 6 159.375 26.5625 1 0 24 6 4 106.25 26.5625 1 1 24 12 2 53.125 26.04166 0 1 24 4 6 156.25 23.4375 0 0 24 3 8 187.5 Block Diagram Pin Assignment Pulldown 2 nQ2 F SEL 1:0 nQ1 1 24 2 23 Q2 Q1 Pulldown nPLL SEL Q0 VCCO V 3 22 CCO Q0 4 21 Q3 F SEL 1:0 nQ0 5 20 nQ3 Pulldown nQ0 0 0 3 TEST CLK 11 1 6 19 VEE MR 0 1 4 Q1 nPLL SEL 7 18 nc 26.5625MHz 1 0 6 nc VCO 8 17 XTAL IN nQ1 1 1 12 Phase 637.5MHz V 9 0 CCA 16 TEST CLK OSC 0 Detector (w/26.5625MHz F SEL0 VEE 10 15 Reference) XTAL OUT V CC 11 14 XTAL IN Q2 F SEL1 12 13 Pulldown nXTAL SEL nQ2 ICS843004 M = 24 (fixed) Q3 24-Lead TSSOP 4.4mm x 7.8mm x 0.925mm nQ3 Pulldown package body MR G Package Top View 843004 Rev C 5/26/15 1 2015 Integrated Device Technology, Inc.843004 DATA SHEET Table 1. Pin Descriptions Number Name Type Description 1, 2 Output Differential output pair. LVPECL interface levels. nQ1, Q1 3, 22 V Power Output supply pins. CCO 4, 5 Output Differential output pair. LVPECL interface levels. Q0, nQ0 Active HIGH Master Reset. When logic HIGH, the internal dividers are reset causing the true outputs Qx to go low and the inverted outputs nQx to go high. 6 MR Input Pulldown When logic LOW, the internal dividers and the outputs are enabled. LVCMOS/LVTTL interface levels. Selects between the PLL and TEST CLK as input to the dividers. When 7 nPLL SEL Input Pulldown LOW, selects PLL (PLL Enable). When HIGH, deselects the reference clock (PLL Bypass). LVCMOS/LVTTL interface levels. 8, 18 Unused No connect. nc 9V Power Analog supply pin. CCA F SEL0. 10, 12 Input Pulldown Frequency select pins. LVCMOS/LVTTL interface levels. F SEL1 11 V Power Core supply pin. CC 13, XTAL OUT, Parallel resonant crystal interface. Input 14 XTAL IN XTAL OUT is the output, XTAL IN is the input. 15, 19 V Power Negative supply pins. EE 16 TEST CLK Input Pulldown Single-ended clock input. LVCMOS/LVTTL interface levels. Selects between the single-ended TEST CLK or crystal interface as the PLL 17 nXTAL SEL Input Pulldown reference source. When HIGH, selects TEST CLK. When LOW, selects XTAL. LVCMOS/LVTTL interface levels. 20, 21 Output Differential output pair. LVPECL interface levels. nQ3, Q3 23, 24 Output Differential output pair. LVPECL interface levels. Q2, nQ2 NOTE: Pulldown refers to internal input resistors. See Table 2, Pin Characteristics, for typical values. Table 2. Pin Characteristics Symbol Parameter Test Conditions Minimum Typical Maximum Units C Input Capacitance 4 pF IN R Input Pulldown Resistor 51 k PULLDOWN Rev C 5/26/15 2 FEMTOCLOCKS LVCMOS/CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER