MAX9401 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Quad ECL/PECL Differential Buffers/Receivers

19-2245; Rev 0; 10/01
EVAALVUAAILTAIOBNLEKIT
Quad ECL/PECL Differential
Buffers/Receivers
General Description
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.
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
MAX9401/MAX9404 operate over a V_CC - V_EE = +3.0V
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.
Applications
Data and Clock Driver and Buffer
Central Office Backplane Clock Distribution
DSLAM Backplane
Base Station
ATE
Functional Diagram appears at end of data sheet.
TOP VIEW
*
VCC 1
SEL 2
SEL 3
CLK 4
CLK 5
EN 6
EN 7
VCC 8
*
MAX9401/
MAX9404
*
*
24 VCC
23 OUT1
22 OUT1
21 VEE
20 VEE
19 OUT2
18 OUT2
17 VCC
*
Features
o Differential Double-Swing ECL/PECL Outputs
o Input Compatible with LVECL/LVPECL
o Guaranteed 900mV Differential Output at 3.0GHz
Clock Rate
o 365ps Propagation Delay in Asynchronous Mode
o 10ps Channel-to-Channel Skew in Synchronous
Mode
o Integrated 100Ω Input Terminations (MAX9404)
o Compatible +3.3V/+5.0V Nominal Supplies
o Selectable Synchronous/Asynchronous
Operation
Ordering Information
PART
TEMP. PIN-
RANGE PACKAGE
INPUT
IMPEDANCE
MAX9401EGJ*
-40°C to 32 QFN-EP**
+85°C (5mm x 5mm)
Open
MAX9401EHJ
-40°C to 32 TQFP
+85°C (5mm x 5mm)
Open
MAX9404EGJ*
-40°C to 32 QFN-EP**
+85°C (5mm x 5mm)
100Ω
MAX9404EHJ
-40°C to 32 TQFP
+85°C (5mm x 5mm)
100Ω
*Future product—contact factory for availability.
**EP = Exposed paddle
Pin Configurations
32 31 30 29 28 27 26 25
VCC 1
SEL 2
SEL 3
CLK 4
CLK 5
EN 6
EN 7
VCC 8
MAX9401
MAX9404
24 VCC
23 OUT1
22 OUT1
21 VEE
20 VEE
19 OUT2
18 OUT2
17 VCC
9 10 11 12 13 14 15 16
QFN-EP*
*EXPOSED PAD AND CORNER PINS ARE CONNECTED TO VEE
TQFP
________________________________________________________________ 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.