MAX3610 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Low-Jitter 106.25MHz/212.5MHz Fibre-Channel Clock Generator

19-3286; Rev 0; 5/04
Low-Jitter 106.25MHz/212.5MHz Fibre-Channel
Clock Generator
General Description
The MAX3610 is a low-jitter, high-performance, dual-rate
clock generator optimized for 1Gbps/2Gbps/4Gbps
Fibre-Channel applications. When connected with an
external AT-cut crystal, the device generates a precision
clock output by integrating a crystal oscillator with
Maxim’s low-noise phase-locked loop (PLL) providing a
low-cost solution. By coupling Maxim’s low-noise PLL
design featuring a low-jitter generation VCO with an
inexpensive fundamental mode crystal, the MAX3610
provides the optimum combination of low cost, flexibility,
and high performance.
The MAX3610 output frequency is selectable. When
using a 26.5625MHz crystal, the output clock rate can
be set to either 106.25MHz or 212.5MHz. When operat-
ing at 106.25MHz, the typical phase jitter is 0.7ps_RMS
from 12kHz to 20MHz. The MAX3610A has low-voltage
positive-emitter-coupled logic (LVPECL) clock output
drivers. The MAX3610B has low-voltage differential-sig-
nal (LVDS) clock output drivers. The MAX3610 output
drivers can also be disabled.
The MAX3610 operates from a single +3.3V supply.
The PECL version typically consumes 165mW, while the
LVDS version typically consumes 174mW. Both devices
are available in die form and have a 0°C to +85°C oper-
ating temperature range.
Applications
Fibre-Channel Hard Disk Drives
Host Bus Adapters
Raid Controllers
Fibre-Channel Switches
+3.3V
Features
♦ Clock Output Frequencies: 106.25MHz or
212.5MHz
♦ Phase Jitter: 0.7ps_RMS
♦ LVPECL or LVDS Output
♦ Excellent Power-Supply Noise Rejection
♦ Supply Current: 50mA at +3.3V Supply (LVPECL)
53mA at +3.3V Supply (LVDS)
♦ 0°C to +85°C Temperature Range
♦ Optional Output Disable
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
OUTPUTS
MAX3610AU/D 0°C to +85°C Die
MAX3610BU/D 0°C to +85°C Die
LVPECL
LVDS
Dice are designed to operate from 0°C to +85°C, but are tested
and guaranteed only at T_A = +25°C.
Typical Operating Circuits
+3.3V
0.1µF
0.1µF
AT CUT
CRYSTAL
OE ^VCC FREQSET
+3.3V
MAX3610A
X1
OUT+
X2
OUT-
DEVICE WITH
LVPECL INPUTS
GND
50Ω 50Ω
LVPECL OUTPUTS
V_CC -2V
OPERATING AT 106.25MHz
AT CUT
CRYSTAL
OE ^VCC FREQSET
+3.3V
MAX3610B
X1
OUT+
X2
OUT-
100Ω
DEVICE WITH
LVDS INPUTS
GND
LVDS OUTPUTS
OPERATING AT 106.25MHz
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.