MAX9326 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 1:9 Differential LVPECL/LVECL/HSTL Clock and Data Driver

19-2538; Rev 2; 10/02
1:9 Differential LVPECL/LVECL/HSTL Clock and
Data Driver
General Description
The MAX9326 low-skew, 1:9 differential driver features
extremely low output-to-output skew (50ps max) and
part-to-part skew (225ps max). These features make
the device ideal for clock and data distribution across a
backplane or board. The device repeats an HSTL or
LVECL/LVPECL differential input at nine differential out-
puts. Outputs are compatible with LVECL and LVPECL,
and directly drive 50Ω terminated transmission lines.
The differential inputs can be configured to accept a
single-ended signal when the unused complementary
input is connected to the on-chip reference output volt-
age V_BB. All inputs have internal pulldown resistors to
V_EE. The internal pulldowns and a fail-safe circuit
ensure differential low default outputs when the inputs
are left open or at V_EE.
The MAX9326 operates over a +2.375V to +3.8V supply
range for interfacing to differential HSTL and LVPECL
signals. This allows high-performance clock or data dis-
tribution in systems with a nominal +2.5V or +3.3V sup-
ply. For LVECL operation, the device operates with a
-2.375V to -3.8V supply.
The MAX9326 is offered in 28-lead PLCC and space-
saving 28-lead QFN packages. The MAX9326 is speci-
fied for operation from -40°C to +85°C.
Applications
Precision Clock Distribution
Low-Jitter Data Repeaters
Features
o 50ps (max) Output-to-Output Skew
o 1.5ps_RMS (max) Random Jitter
o Guaranteed 300mV Differential Output at 1.0GHz
o +2.375V to +3.8V Supplies for Differential
HSTL/LVPECL
o -2.375V to -3.8V Supplies for Differential LVECL
o On-Chip Reference for Single-Ended Inputs
o Outputs Low for Inputs Open or at V_EE
o Pin Compatible with MC100LVE111
PART
MAX9326EQI
MAX9326EGI
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
28 PLCC
28 QFN 5mm x 5mm
Functional Diagram appears at end of data sheet.
TOP VIEW
VEE ₂₆
N.C. 27
CLK 28
VCC 1
CLK 2
VBB 3
N.C. 4
25 24 23 22 21 20 19
MAX9326
18 Q3
17 Q3
16 Q4
15 VCC
14 Q4
13 Q5
12 Q5
5 6 7 8 9 10 11
VEE 1
N.C. 2
CLK 3
VCC 4
CLK 5
VBB 6
N.C. 7
Pin Configurations
MAX9326
21 Q3
20 Q3
19 Q4
18 VCC
17 Q4
16 Q5
15 Q5
PLCC
QFN*
*CORNER PINS AND EXPOSED PAD ARE CONNECTED TO VEE.
________________________________________________________________ Maxim Integrated Products 1
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