19-2245; Rev 0; 10/01
Quad ECL/PECL Differential
Buffers/Receivers
General Description
Features
The MAX9401/MAX9404 are extremely fast and low-
skew quad ECL/PECL differential buffers/receivers for
data and clock signals. The four channels can be oper-
ated synchronously with an external clock, or in asyn-
chronous mode, determined by the state of the SEL
input. An enable input provides the ability to force all
the outputs to a differential low state.
ꢀ Differential Double-Swing ECL/PECL Outputs
ꢀ Input Compatible with LVECL/LVPECL
ꢀ Guaranteed 900mV Differential Output at 3.0GHz
Clock Rate
ꢀ 365ps Propagation Delay in Asynchronous Mode
ꢀ 10ps Channel-to-Channel Skew in Synchronous
The MAX9401 has high-impedance (open) input and
the MAX9404 has an integrated 100Ω differential input
termination, which reduces external component count.
Both devices have double amplitude swing open emit-
ter outputs suitable for driving long cables. The
Mode
ꢀ Integrated 100Ω Input Terminations (MAX9404)
ꢀ Compatible +3.3V/+5.0V Nominal Supplies
MAX9401/MAX9404 operate over a V
- V = +3.0V
EE
CC
ꢀ Selectable Synchronous/Asynchronous
to +5.5V supply range, and are specified for operation
from -40°C to +85°C. These devices are offered in
space-saving 32-pin 5mm x 5mm QFN exposed-paddle
(EP) and TQFP packages.
Operation
Ordering Information
TEMP.
PIN-
PACKAGE
INPUT
IMPEDANCE
PART
RANGE
Applications
-40°C to
+85°C
32 QFN-EP**
(5mm x 5mm)
MAX9401EGJ*
MAX9401EHJ
MAX9404EGJ*
MAX9404EHJ
Open
Open
100Ω
100Ω
Data and Clock Driver and Buffer
Central Office Backplane Clock Distribution
DSLAM Backplane
-40°C to
+85°C
32 TQFP
(5mm x 5mm)
-40°C to
+85°C
32 QFN-EP**
(5mm x 5mm)
Base Station
ATE
-40°C to
+85°C
32 TQFP
(5mm x 5mm)
*Future product—contact factory for availability.
**EP = Exposed paddle
Functional Diagram appears at end of data sheet.
Pin Configurations
TOP VIEW
32 31 30 29 28 27 26 25
*
*
V
1
2
3
4
5
6
7
8
24 V
CC
CC
V
1
2
3
4
5
6
7
8
24
V
CC
CC
SEL
SEL
CLK
CLK
EN
23 OUT1
22 OUT1
SEL
SEL
CLK
CLK
EN
23 OUT1
22 OUT1
MAX9401/
MAX9404
21
20
V
V
21
20
V
EE
V
EE
EE
EE
MAX9401
MAX9404
19 OUT2
18 OUT2
19 OUT2
18 OUT2
EN
*
EN
V
CC
17
V
CC
V
17 V
CC
CC
*
*
9
10 11 12 13 14 15 16
TQFP
QFN-EP*
*EXPOSED PAD AND CORNER PINS ARE CONNECTED TO V
EE
________________________________________________________________ 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.