19-2245; Rev 0; 10/01
KIT
ATION
EVALU
E
BL
AVAILA
Quad ECL/PECL Differential
Buffers/Receivers
General Description
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 100鈩?Input Terminations (MAX9404)
o
Compatible +3.3V/+5.0V Nominal Supplies
o
Selectable Synchronous/Asynchronous
Operation
MAX9401/MAX9404
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 100鈩?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擄C to +85擄C. These devices are offered in
space-saving 32-pin 5mm x 5mm QFN exposed-paddle
(EP) and TQFP packages.
Ordering Information
PART
TEMP.
RANGE
-40擄C to
+85擄C
-40擄C to
+85擄C
-40擄C to
+85擄C
-40擄C to
+85擄C
PIN-
PACKAGE
32 QFN-EP**
(5mm x 5mm)
32 TQFP
(5mm x 5mm)
32 QFN-EP**
(5mm x 5mm)
32 TQFP
(5mm x 5mm)
INPUT
IMPEDANCE
Open
Open
100鈩?/div>
100鈩?/div>
Applications
Data and Clock Driver and Buffer
Central Office Backplane Clock Distribution
DSLAM Backplane
Base Station
ATE
MAX9404EHJ
MAX9404EGJ*
MAX9401EGJ*
MAX9401EHJ
Functional Diagram appears at end of data sheet.
*Future
product鈥攃ontact factory for availability.
**EP
= Exposed paddle
Pin Configurations
OUT0
OUT0
OUT0
V
CC
V
EE
IN0
IN0
IN1
IN1
V
CC
TOP VIEW
OUT0
V
EE
IN0
IN0
32
31
30
29
28
27
26
25
32
31
30
29
28
27
26
IN1
25
24 V
CC
23 OUT1
22 OUT1
21 V
EE
*
V
CC
SEL
SEL
CLK
CLK
EN
EN
V
CC
1
2
3
4
5
6
7
8
*
24
23
22
V
CC
OUT1
OUT1
V
EE
V
EE
OUT2
OUT2
V
CC
V
CC
SEL
SEL
CLK
CLK
EN
EN
V
CC
1
2
3
4
5
6
7
8
9
IN3
10
IN3
11
V
CC
12
OUT3
13
OUT3
14
V
EE
15
IN2
16
IN2
MAX9401/
MAX9404
21
20
19
MAX9401
MAX9404
IN1
20 V
EE
19 OUT2
18 OUT2
17 V
CC
*
18
17
*
10
11
12
13
14
15
IN3
V
EE
IN3
OUT3
OUT3
V
CC
IN2
IN2
16
9
*
QFN-EP*
*EXPOSED PAD AND CORNER PINS ARE CONNECTED TO V
EE
TQFP
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
                         
                        
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