19-2538; Rev 1; 7/02
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 50鈩?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擄C to +85擄C.
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
Features
MAX9326
Ordering Information
PART
MAX9326EQI
MAX9326ETI*
TEMP RANGE
-40擄C to +85擄C
-40擄C to +85擄C
PIN-PACKAGE
28 PLCC
28 QFN 5mm x 5mm
*Future
product鈥攃ontact factory for availability.
Functional Diagram appears at end of data sheet.
Applications
Precision Clock Distribution
Low-Jitter Data Repeaters
Pin Configurations
V
CC
Q0
Q0
Q1
Q1
Q2
Q2
V
CC
TOP VIEW
Q0
Q0
Q1
Q1
Q2
28
27
26
25
24
23
V
EE
N.C.
CLK
V
CC
CLK
V
BB
N.C.
26
27
28
1
2
3
4
18
17
16
Q3
Q3
Q4
V
CC
Q4
Q5
Q5
V
EE
N.C.
CLK
V
CC
CLK
V
BB
N.C.
1
2
3
4
5
6
7
21
20
19
Q3
Q3
Q4
V
CC
Q4
Q5
Q5
MAX9326
15
14
13
12
MAX9326
22
18
17
16
15
Q6
25 24
23 22
21
20
19
5
6
7
Q7
8
9
10
Q6
11
Q6
Q8
Q8
V
CC
Q7
10
11
12
13
Q6
Q7
Q8
Q8
QFN*
*CORNER PINS AND EXPOSED PAD ARE CONNECTED TO V
EE
.
________________________________________________________________
Maxim Integrated Products
V
CC
Q7
PLCC
14
8
9
Q2
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.