MAX9424 Datasheet, PDF (1/11 Pages) Maxim Integrated Products – Lowest Jitter Quad PECL-to-ECL Differential Translators

19-2390; Rev 0; 4/02
Lowest Jitter Quad PECL-to-ECL
Differential Translators
General Description
The MAX9424–MAX9427 high-speed, low-skew quad
PECL-to-ECL translators are designed for high-speed
data and clock driver applications. These devices feature
an ultra-low 0.24ps_(RMS) random jitter and channel-to-
channel skew is less than 90ps in asynchronous mode.
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.
The parts differ from one another by their input and out-
put termination options. The input options are an open
input or an internal differential 100Ω termination. The
output options are an open-emitter output or a series
50Ω termination. See Ordering Information.
The MAX9424–MAX9427 operate from a positive voltage
supply of +2.375V to +5.5V, and a negative supply volt-
age of -2.375V to -5.5V and operate across the extended
temperature range of -40°C to +85°C. They are offered in
32-pin 5mm x 5mm TQFP and space-saving 5mm x 5mm
QFN packages.
Applications
Data and Clock Driver and Buffer
Central Office Backplane Clock Distribution
DSLAM Backplane
Base Station
ATE
TOP VIEW
Features
o 0.24ps RMS Added Random Jitter
o 10ps Channel-to-Channel Skew in Synchronous
Mode
o Guaranteed 500mV Differential Output at 3GHz
Clock Frequency
o 420ps Propagation Delay in Asynchronous Mode
o Functionally Compatible with
SK4426 (MAX9424)
SK4430 (MAX9425)
SK4436 (MAX9426)
SK4440 (MAX9427)
o Integrated 50Ω Outputs (MAX9425/MAX9427)
o Integrated 100Ω Inputs (MAX9426/MAX9427)
o Synchronous/Asynchronous Operation
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
INPUT
(IN_,
IN_)
OUTPUT
(OUT_,
OUT_)
MAX9424EHJ -40°C to +85°C 32 TQFP Open Open
MAX9424EGJ* -40°C to +85°C 32 QFN Open Open
MAX9425EHJ -40°C to +85°C 32 TQFP Open 50Ω
MAX9425EGJ* -40°C to +85°C 32 QFN Open 50Ω
MAX9426EHJ -40°C to +85°C 32 TQFP 100Ω Open
MAX9426EGJ* -40°C to +85°C 32 QFN 100Ω Open
MAX9427EHJ -40°C to +85°C 32 TQFP 100Ω 50Ω
MAX9427EGJ* -40°C to +85°C 32 QFN 100Ω 50Ω
*Future product—contact factory for availability.
Pin Configurations
TOP VIEW
VCC 1
SEL 2
SEL 3
CLK 4
CLK 5
EN 6
EN 7
VCC 8
32 31 30 29 28 27 26 25
MAX9424
MAX9425
MAX9426
MAX9427
24 VGG
23 OUT1
22 OUT1
21 VEE
20 VEE
19 OUT2
18 OUT2
17 VGG
9 10 11 12 13 14 15 16
*
VCC 1
SEL 2
SEL 3
CLK 4
CLK 5
EN 6
EN 7
VCC 8
*
MAX9424
MAX9425
MAX9426
MAX9427
*
24 VGG
23 OUT1
22 OUT1
21 VEE
20 VEE
19 OUT2
18 OUT2
17 VGG
*
TQFP (5mm x 5mm)
QFN
NOTE: CORNER PINS ARE CONNECTED TO VGG.
________________________________________________________________ Maxim Integrated Products 1
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