19-2223; Rev 1; 1/02
Quad Differential LVECL/LVPECL
Buffer/Receivers
General Description
Features
ꢀ 400mV Differential Output at 3.0GHz Data Rate
ꢀ 335ps Propagation Delay in Asynchronous Mode
The MAX9400/MAX9402/MAX9403/MAX9405 are
extremely fast, low-skew quad LVECL/ECL or LVPECL/
PECL buffer/receivers designed for high-speed data
and clock driver applications. These devices feature an
ultra-low propagation delay of 335ps and channel-to-
channel skew of 16ps in asynchronous mode with
86mA supply current.
ꢀ 8ps Channel-to-Channel Skew in Synchronous
Mode
ꢀ Integrated 50Ω Outputs (MAX9402/MAX9405)
ꢀ Integrated 100Ω Inputs (MAX9403/MAX9405)
ꢀ Synchronous/Asynchronous Operation
The four channels can be operated synchronously with
an external clock, or in asynchronous 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.
Ordering Information
A variety of input and output terminations are offered for
maximum design flexibility. The MAX9400 has open
inputs and open emitter outputs. The MAX9402 has
open inputs and 50Ω series outputs. The MAX9403 has
100Ω differential input impedance and open emitter
outputs. The MAX9405 has 100Ω differential input
impedance and 50Ω series outputs.
TEMP
RANGE
PIN-
DATA
PART
OUTPUT
PACKAGE INPUT
MAX9400EHJ -40°C to +85°C 32 TQFP
MAX9400EGJ* -40°C to +85°C 32 QFN
MAX9402EHJ -40°C to +85°C 32 TQFP
MAX9402EGJ* -40°C to +85°C 32 QFN
MAX9403EHJ -40°C to +85°C 32 TQFP
MAX9403EGJ* -40°C to +85°C 32 QFN
MAX9405EHJ -40°C to +85°C 32 TQFP
MAX9405EGJ* -40°C to +85°C 32 QFN
Open
Open
Open
Open
100Ω
100Ω
100Ω
100Ω
Open
Open
50Ω
These devices operate with a supply voltage of (V
EE
-
CC
50Ω
V
) = 2.375V to 5.5V, and are specified for operation
Open
Open
50Ω
from -40°C to +85°C. These devices are offered in
space-saving 32-pin 5mm ✕ 5mm TQFP and 32-lead
5mm ✕ 5mm QFN packages.
50Ω
*Future product—contact factory for availability.
Applications
Data and Clock Driver and Buffer
Central Office Backplane Clock Distribution
DSLAM Backplane
Pin Configurations
TOP VIEW
Base Station
32 31 30 29 28 27 26 25
ATE
V
1
2
3
4
5
6
7
8
24
23
V
CC
CC
OUT1
SEL
SEL
CLK
CLK
EN
22 OUT1
21
20
V
EE
V
EE
MAX9400
MAX9402
MAX9403
MAX9405
Functional Diagram appears at end of data sheet.
19 OUT2
18 OUT2
EN
V
17 V
CC
CC
9
10 11 12 13 14 15 16
TQFP (5mm x 5mm)
Pin Configurations continued 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.