FemtoClock Crystal-to-2.5V, 3.3V LVPECL 843081I-01 Clock Multiplier DATA SHEET GENERAL DESCRIPTION FEATURES The 843081I-01 is an Ethernet Clock Multiplier. The 843081I-01 One differential LVPECL output accepts a crystal reference of 19.6MHz - 28MHz. The 843081I- One crystal oscillator interface: 19.6MHz - 28MHz 01 has excellent 1ps or lower phase jitter performance, over the 1.875MHz - 20MHz integration range. The 843081I-01 is Output frequency range: 490MHz - 700MHz packaged in a small 8-pin TSSOP, making it ideal for use in VCO range: 490MHz - 700MHz systems with limited board space. RMS phase jitter 625MHz using a 25MHz reference (1.875MHz - 20MHz): 0.32ps (typical) 3.3V or 2.5V operating supply -40C to 85C ambient operating temperature Available in lead-free RoHS compliant package For functional replacement part use 843071 FREQUENCY EXAMPLE FUNCTION TABLE Input M/N (Multiplier) Output Frequencies (MHz) XTAL (MHz) 20 25 500 25 25 625 28 25 700 BLOCK DIAGRAM PIN ASSIGNMENT OE VCCA 1 8 VCC XTAL OUT 2 7 Q XTAL IN 3 6 nQ VEE 4 5 OE XTAL IN Q Phase VCO 843081I-01 490 - 700 MHz Detector 8-Lead TSSOP nQ XTAL OUT 4.40mm x 3.0mm x 0.925mm package body G Package Top View M = 25 (fixed) 843081I-01 REVISION C 11/5/15 1 2015 Integrated Device Technology, Inc.843081I-01 DATA SHEET TABLE 1. PIN DESCRIPTIONS Number Name Type Description 1V Power Analog supply pin. CCA 2, XTAL OUT, Crystal oscillator interface. XTAL IN is the input, Input 3 XTAL IN XTAL OUT is the output. 4V Power Negative supply pin. EE Output enable pin. When HIGH, Q output is enabled. 5 OE Input Pullup When LOW, forces Q to HiZ state. LVCMOS/LVTTL interface levels. 6, 7 nQ, Q Output Differential clock outputs. LVPECL interface levels. 8V Power Core supply pin. CC NOTE: Pullup 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 Pullup Resistor 51 k PULLUP FEMTOCLOCKS CRYSTAL-TO- 2 REVISION C 11/5/15 3.3V, 2.5V LVPECL CLOCK MULTIPLIER