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MAX9325

更新时间: 2024-11-12 23:52:11
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描述
2:8 Differential LVPECL/LVECL/HSTL Clock and Data Driver

MAX9325 数据手册

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19-2511; Rev 1; 7/02  
2:8 Differential LVPECL/LVECL/HSTL Clock and  
Data Driver  
General Description  
Features  
The MAX9325 low-skew, 2:8 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 selects one of the two  
differential HSTL or LVECL/LVPECL inputs and repeats  
them at eight differential outputs. Outputs are compati-  
ble with LVECL and LVPECL, and can directly drive  
50terminated transmission lines.  
50ps (max) Output-to-Output Skew  
1.5ps (max) Random Jitter  
RMS  
Guaranteed 300mV Differential Output at 700MHz  
+2.375V to +3.8V Supplies for Differential  
HSTL/LVPECL  
-2.375V to -3.8V Supplies for Differential LVECL  
Two Selectable Differential Inputs  
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-  
On-Chip Reference for Single-Ended Inputs  
Outputs Low for Inputs Open or at V  
Pin Compatible with MC100LVE310  
EE  
age V  
EE.  
All inputs have internal pulldown resistors to  
BB.  
V
The internal pulldowns and a fail-safe circuit  
ensure differential low default outputs when the inputs  
are left open or at V  
.
EE  
The MAX9325 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.  
Ordering Information  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
28 PLCC  
MAX9325EQI  
MAX9325ETI*  
The MAX9325 is offered in 28-lead PLCC and space-  
saving 28-lead QFN packages. The MAX9325 is speci-  
fied for operation from -40°C to +85°C.  
28 QFN 5mm x 5mm  
*Future product—contact factory for availability.  
Applications  
Precision Clock Distribution  
Functional Diagram appears at end of data sheet.  
Low-Jitter Data Repeaters  
Pin Configurations  
TOP VIEW  
INPUT SELECT TRUTH TABLE  
25 24 23 22 21 20 19  
CLK_SEL  
INPUT CLOCK  
*
*
L
CLK0, CLK0 SELECTED  
CLK1, CLK1 SELECTED  
V
EE  
Q3  
Q3  
Q4  
V
26  
27  
28  
1
18  
17  
16  
15  
14  
13  
12  
H
V
1
2
3
4
5
6
7
21 Q3  
20 Q3  
19 Q4  
EE  
CLK_SEL  
CLKO  
CLK_SEL  
CLKO  
V
CC  
CC  
MAX9325  
V
CC  
18  
V
CC  
CLKO  
2
Q4  
Q5  
Q5  
MAX9325  
V
BB  
3
CLKO  
17 Q4  
16 Q5  
15 Q5  
4
CLK1  
V
BB  
CLK1  
5
6
7
8
9
10 11  
*
*
PLCC  
QFN  
*CORNER PINS AND EXPOSED PAD ARE CONNECTED TO V  
.
EE  
________________________________________________________________ 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.  

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