MAX3622 Datasheet, PDF (1/9 Pages) Maxim Integrated Products – Low-Jitter, Precision Clock Generator with Two Outputs

19-2456; Rev 0; 11/07
Low-Jitter, Precision Clock Generator
with Two Outputs
General Description
The MAX3622 is a low-jitter precision clock generator
optimized for networking applications. The device inte-
grates a crystal oscillator and a phase-locked loop
(PLL) clock multiplier to generate high-frequency clock
outputs for Ethernet and other networking applications.
Maxim’s proprietary PLL design features ultra-low jitter
(0.36ps_RMS) and excellent power-supply noise rejec-
tion, minimizing design risk for network equipment.
The MAX3622 has one LVPECL output and one
LVCMOS output. It is available in a 16-pin TSSOP pack-
age and operates over the 0°C to +70°C temperature
range.
Applications
Ethernet Networking Equipment
Typical Application Circuit and Pin Configuration appear
at end of data sheet.
Features
♦ Crystal Oscillator Interface: 25MHz Typical
♦ Output Frequencies: 125MHz and 156.25MHz
♦ Low Jitter
0.14ps_RMS (1.875MHz to 20MHz)
0.36ps_RMS (12kHz to 20MHz)
♦ Excellent Power-Supply Noise Rejection
♦ No External Loop Filter Capacitor Required
Ordering Information
PART
TEMP RANGE
MAX3622CUE+ 0°C to +70°C
+Denotes a lead-free package.
PIN-
PACKAGE
16 TSSOP
PKG
CODE
U16-2
Block Diagram
27pF
X_IN
25MHz
X_OUT
33pF
MAX3622
RESET LOGIC/POR
RESET
CRYSTAL
OSCILLATOR
625MHz
PFD
FILTER
VCO
RESET
÷ 25
÷5
RESET
LVCMOS
BUFFER
RESET
÷4
LVPECL
BUFFER
QAC_OE
QA_C
QB_OE
QB
QB
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.