19-2079; Rev 1; 2/02
Dual 1:5 Differential LVPECL/LVECL/HSTL
Clock and Data Drivers
General Description
The MAX9312/MAX9314 are low skew, dual 1-to-5 dif-
ferential drivers designed for clock and data distribu-
tion. These devices accept two inputs. Each input is
reproduced at five differential outputs. The differential
inputs can be adapted to accept single-ended inputs
by connecting the on-chip V
BB
supply to one input as a
reference voltage.
The MAX9312/MAX9314 feature low part-to-part skew
(30ps) and output-to-output skew (12ps), making them
ideal for clock and data distribution across a backplane
or a board. For interfacing to differential HSTL and
LVPECL signals, these devices operate over a +2.25V
to +3.8V supply range, allowing high-performance
clock or data distribution in systems with a nominal
+2.5V or +3.3V supply. For differential LVECL opera-
tion, these devices operate from a -2.25V to -3.8V sup-
ply.
The MAX9312 features an on-chip V
BB
reference output
of 1.425V below the positive supply voltage. The
MAX9314 offers an on-chip V
BB
reference output of
1.32V below the positive supply voltage.
Both devices are offered in space-saving, 32-pin 5mm
✕
5mm TQFP, 5mm x 5mm QFN, and industry-standard
32-pin 7mm
✕
7mm TQFP packages.
Features
o
+2.25V to +3.8V Differential HSTL/LVPECL
Operation
o
-2.25V to -3.8V Differential LVECL Operation
o
30ps (typ) Part-to-Part Skew
o
12ps (typ) Output-to-Output Skew
o
312ps (typ) Propagation Delay
o
≥
300mV Differential Output at 3GHz
o
On-Chip Reference for Single-Ended Inputs
o
Output Low with Open Input
o
Pin Compatible with MC100LVEP210 (MAX9312)
and MC100EP210 (MAX9314)
o
Offered in Tiny QFN* Package (70% Smaller
Footprint than LQFP)
MAX9312/MAX9314
Ordering Information
PART
MAX9312ECJ
MAX9312EGJ*
MAX9312EHJ*
MAX9314ECJ
MAX9314EGJ*
MAX9314EHJ*
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
32 TQFP (7mm
✕
7mm)
32 QFN (5mm
✕
5mm)
32 TQFP (5mm
✕
5mm)
32 TQFP (7mm
✕
7mm)
32 QFN (5mm
✕
5mm)
32 TQFP (5mm
✕
5mm)
Applications
Precision Clock Distribution
Low-Jitter Data Repeater
*Future product—contact factory for availability.
Functional Diagram
QA0
V
CC
V
CC
QA0
QA1
QA1
QA2
QA2
75kΩ
75kΩ
QA3
V
EE
V
BB
V
EE
QA3
QA4
QA4
V
EE
V
EE
CLKB
CLKB
75kΩ
75kΩ
QB3
QB3
QB4
QB4
75kΩ
QB0
QB0
QB1
QB1
QB2
QB2
75kΩ
CLKA
CLKA
Pin Configuration appears at end of data sheet.
________________________________________________________________
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.
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