MAXIM MAX9312, MAX9314 User Manual
General Description
The MAX9312/MAX9314 are low skew, dual 1-to-5 differential drivers designed for clock and data distribution. These devices accept two inputs. Each input is
reproduced at five differential outputs. The differential
inputs can be adapted to accept single-ended inputs
by connecting the on-chip VBBsupply to one input as a
reference voltage.
The MAX9312/MAX9314 feature low part-to-part skew
(30ps) and output-to-output skew (12ps), making them
ideal for clock and data distribution across a backplane
or a board. For interfacing to differential HSTL and
LVPECL signals, these devices operate over a +2.25V
to +3.8V supply range, allowing high-performance clock
or data distribution in systems with a nominal +2.5V or
+3.3V supply. For differential LVECL operation, these
devices operate from a -2.25V to -3.8V supply.
The MAX9312 features an on-chip VBBreference output
of 1.425V below the positive supply voltage. The
MAX9314 offers an on-chip VBBreference output of
1.32V below the positive supply voltage.
Both devices are offered in an industry-standard 32-pin
7mm x 7mm LQFP package. In addition, the MAX9312
is offered in a space-saving 32-pin 5mm x 5mm TQFN
package.
Applications
Precision Clock Distribution
Low-Jitter Data Repeater
Features
o +2.25V to +3.8V Differential HSTL/LVPECL
Operation
o -2.25V to -3.8V Differential LVECL Operation
o 30ps (typ) Part-to-Part Skew
o 12ps (typ) Output-to-Output Skew
o 312ps (typ) Propagation Delay
o ≥ 300mV Differential Output at 3GHz
o On-Chip Reference for Single-Ended Inputs
o Output Low with Open Input
o Pin Compatible with MC100LVEP210 (MAX9312)
and MC100EP210 (MAX9314)
o Offered in Tiny QFN* Package (70% Smaller
Footprint than LQFP)
MAX9312/MAX9314
Dual 1:5 Differential LVPECL/LVECL/HSTL
Clock and Data Drivers
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
19-2079; Rev 2; 4/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Pin Configuration appears at end of data sheet.
Functional Diagram
*
Exposed pad.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
PART TEMP RANGE PIN-PACKAGE
MAX9312ECJ+ -40°C to +85°C 32 LQFP
MAX9312ETJ+ -40°C to +85°C 32 TQFN-EP*
MAX9314ECJ -40°C to +85°C 32 LQFP
QB0
QB0
QB1
QB1
QB2
QB2
QB3
QB3
QB4
QB4
V
CC
75kΩ
CLKA
CLKA
75kΩ 75kΩ
V
V
EE
V
BB
EE
QA0
QA0
QA1
QA1
QA2
QA2
QA3
QA3
QA4
QA4
CLKB
CLKB
75kΩ 75kΩ
75kΩ
V
EE
V
CC
V
EE
MAX9312/MAX9314
Dual 1:5 Differential LVPECL/LVECL/HSTL
Clock and Data Drivers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(VCC- VEE= +2.25V to +3.8V, outputs loaded with 50Ω ±1% to VCC- 2V.) (Notes 2–5)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VCC- VEE...............................................................................4.1V
Inputs (CLK_, CLK_) .............................V
EE
- 0.3V to VCC+ 0.3V
CLK_ to CLK_ ....................................................................±3.0V
Continuous Output Current .................................................50mA
Surge Output Current........................................................100mA
V
BB
Sink/Source Current ...............................................±0.65mA
Continuous Power Dissipation (T
A
= +70°C)
32-Pin LQFP (derate 20.7mW/°C above +70°C) ....1652.9mW
32-Pin TQFN (derate 34.5mW/°C above +70°C)....2758.6mW
Junction-to-Case Thermal Resistance (T
JC
) (Note A)
32-Pin LQFP ................................................................12°C/W
32-Pin TQFN ..................................................................2°C/W
Junction-to-Ambient Thermal Resistance (T
JA
) (Note 1)
32-Pin LQFP .............................................................48.4°C/W
32-Pin TQFN ................................................................29°C/W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
ESD Protection
Human Body Model (CLK_, CLK_, Q_, Q_) ........................2kV
Soldering Temperature (10s) ...........................................+300°C
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial
.
PARAMETER SYMBOL CONDITIONS
INPUTS (CLK_, CLK_)
-40°C +25°C +85°C
MIN MAX MIN MAX MIN MAX
UNITS
Single-Ended
Input High
Voltage
Single-Ended
Input Low
Voltage
High Voltage of
Differential Input
Low Voltage of
Differential Input
Differential Input
Voltage
Input High
Current
CLK_ Input Low
Current
V
V
V
IHD
V
ILD
V
IHD
V
ILD
I
IH
I
ILCLK
V
IH
B B
connected
to CLK_
(V
for V
IL
connected
MAX9312
B B
MAX9314
to C LK_)
V
IL
B B
connected
to CLK_
(V
for V
IL
connected
MAX9312 V
B B
MAX9314 V
to C LK_)
For VCC - VEE < 3.0V 0.095
-
V
CC
1.23
V
CC
1.165
EE
EE
VEE +
1.2
V
EE
V
CC
V
CC
VCC -
1.62
VCC -
1.475
V
CC
VCC -
0.095
V
CC
V
EE
VCC -
1.23
VCC -
1.165
V
EE
V
EE
VEE +
1.2
V
EE
-
0.095
V
CC
V
CC
VCC -
1.62
VCC -
1.475
V
CC
VCC -
0.095
V
CC
V
EE
-
For VCC - VEE ≥ 3.0V 0.095 3.0 0.095 3.0 0.095 3.0
150 150 150 µA
-10 +10 -10 +10 -10 +10 µA
VCC -
1.23
VCC -
1.165
V
EE
V
EE
VEE +
1.2
V
EE
0.095
V
CC
V
CC
VCC -
1.62
VCC -
1.475
V
CC
VCC -
0.095
V
CC
V
EE
V
V
V
V
V
MAX9312/MAX9314
Dual 1:5 Differential LVPECL/LVECL/HSTL
Clock and Data Drivers
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC- VEE= +2.25V to +3.8V, outputs loaded with 50Ω ±1% to VCC- 2V.) (Notes 2–5)
PARAMETER SYMBOL CONDITIONS
CLK_ Input Low
Current
OUTPUTS (Q__, Q__)
Single-Ended
Output High
Voltage
Single-Ended
Output Low
Voltage
Differential
Output Voltage
REFERENCE (VBB)
Reference
Voltage Output
(Note 6)
POWER SUPPLY
Supply Current
(Note 7)
I
ILCLK
V
OH
V
OL
VOH -
V
OL
V
BB
I
EE
Figure 1
Figure 1
Figure 1 670 950 670 950 670 950 mV
MAX9312
IBB =
±0.5mA
MAX9314
-40°C +25°C +85°C
MIN MAX MIN MAX MIN MAX
-150 -150 -150 µA
V
-
CC
1.025
V
CC
-1.930
V
CC
1.525
V
CC
1.38
VCC -
0.900
-
VCC -
1.695
-
VCC -
1.325
-
VCC -
1.26
75 82 95 mA
VCC -
1.025
VCC -
-1.930
VCC -
1.525
VCC -
1.38
VCC -
0.900
VCC -
1.695
VCC -
1.325
VCC -
1.26
VCC -
1.025
VCC -
-1.930
VCC -
1.525
VCC -
1.38
VCC -
0.900
VCC -
1.695
VCC -
1.325
VCC -
1.26
UNITS
V
V
V
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