19-2542; Rev 0; 7/02
1:5 Clock Driver with Selectable LVPECL
Inputs/Single-Ended Inputs and LVDS Outputs
General Description
The MAX9310A is a fast, low-skew 1:5 differential driver
with selectable LVPECL inputs and LVDS outputs,
designed for clock distribution applications. This device
features an ultra-low propagation delay of 340ps with
48mA of supply current.
The MAX9310A operates from a 3V to 3.6V power sup-
ply for use in 3.3V systems. A 2:1 input multiplexer is
used to select one of two differential inputs. The input
selection is controlled through the CLKSEL pin.
This device features a synchronous enable function.
The MAX9310A LVPECL inputs can be driven by either
a differential or single-ended signal. A V
BB
reference
voltage output is provided for use with single-ended
inputs. The device can also accept differential HSTL
signals.
The MAX9310A is offered in a space-saving 20-pin
TSSOP package and operates over the extended tem-
perature range from -40°C to +85°C.
o
8.0ps Output-to-Output Skew
o
340ps Propagation Delay
o
Accepts LVPECL and Differential HSTL Inputs
o
Synchronous Output Enable/Disable
o
Two Selectable Differential Inputs
o
3V to 3.6V Supply Voltage
o
On-Chip Reference for Single-Ended Operation
o
ESD Protection:
±2kV
(Human Body Model)
o
Input Bias Resistors Drive Output Low for Open
Inputs
Features
o
Guaranteed 1.0GHz Operating Frequency
MAX9310A
Applications
Data and Clock Drivers and Buffers
Central-Office Backplane Clock Distribution
DSLAM
Base Stations
ATE
PART
MAX9310AEUP
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
20 TSSOP
Pin Configuration
Functional Diagram appears at end of data sheet.
TOP VIEW
Typical Application Circuit
Q0 1
QO 2
Q1 3
Q1 4
20 V
CC
19 EN
18 V
CC
17 CLK1
MAX9310A
Z
O
= 50Ω
Q_
RECEIVER
Q2 5
Q2 6
Q3 7
MAX9310A
16 CLK1
15 V
BB
14 CLK0
13 CLK0
12 CLKSEL
11 GND
Z
O
= 50Ω
Q_
100Ω
Q3 8
Q4 9
Q4 10
TSSOP
________________________________________________________________
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.
1:5 Clock Driver with Selectable LVPECL
Inputs/Single-Ended Inputs and LVDS Outputs
MAX9310A
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ...........................................................-0.3V to +4.1V
EN,
CLKSEL, CLK_,
CLK_,
to GND............-0.3V to (V
CC
+ 0.3V)
CLK_ to
CLK_.........................................................................±3V
Continuous Output Current .................................................24mA
Surge Output Current..........................................................50mA
V
BB
Sink/Source Current ...............................................±0.65mA
Continuous Power Dissipation (T
A
= +70°C)
Single-Layer PC Board
20-Pin TSSOP (derate 7.69mW/°C above +70°C) ......615mW
Multilayer PC Board
20-Pin TSSOP (derate 11mW/°C above +70°C) .........879mW
Junction-to-Ambient Thermal Resistance in Still Air
Single-Layer PC Board
20-Pin TSSOP .........................................................+130°C/W
Multilayer PC Board
20-Pin TSSOP ...........................................................+91°C/W
Junction-to-Ambient Thermal Resistance with 500LFPM
Airflow Single-Layer PC board
20-Pin TSSOP ...........................................................+96°C/W
Junction-to-Case Thermal Resistance
20-Pin TSSOP ...........................................................+20°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 (inputs and outputs) .......................±2kV
Lead Temperature (soldering, 10s) .................................+300°C
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.
DC ELECTRICAL CHARACTERISTICS
(V
CC
- GND = 3V to 3.6V, outputs terminated with 100Ω
±1%,
unless otherwise noted. Typical values are at V
CC
- GND = 3.3V, V
IHD
=
V
CC
- 1.0V, V
ILD
= V
CC
- 1.5V, unless otherwise noted.) (Notes 1, 2, and 3)
PARAMETER
SYMBOL
CONDITIONS
-40°C
MIN
TYP
MAX
MIN
+25°C
TYP
MAX
MIN
+85°C
TYP
MAX
UNITS
SINGLE-ENDED INPUTS (CLKSEL,
EN)
Input High
Voltage
Input Low
Voltage
Input Current
V
IH
V
IL
I
IN
V
IH(MAX)
,
V
IL(MAX)
V
CC
-
1.165
V
CC
-
1.81
-10
V
CC
-
0.88
V
CC
-
1.475
+70
V
CC
-
1.165
V
CC
-
1.81
-10
V
CC
-
0.88
V
CC
-
1.475
+70
V
CC
-
1.165
V
CC
-
1.81
-10
V
CC
-
0.88
V
CC
-
1.475
+70
V
V
µA
DIFFERENTIAL INPUTS (CLK_,
CLK_)
Single-Ended
Input High
Voltage
Single-Ended
Input Low
Voltage
Differential Input
High Voltage
Differential Input
Low Voltage
Differential Input
Voltage
Input Current
V
CC
-
1.125
V
CC
-
0.88
V
CC
-
1.165
V
CC
-
0.88
V
CC
-
1.165
V
CC
-
0.88
V
IH
Figure 1
V
V
IL
Figure 1
V
CC
-
1.81
1.2
GND
0.095
-100
V
CC
-
1.475
V
CC
V
CC
-
0.095
3.0
+100
V
CC
-
1.81
1.2
GND
0.095
-100
V
CC
-
1.475
V
CC
V
CC
-
0.095
3.0
+100
V
CC
-
1.81
1.2
GND
0.095
-100
V
CC
-
1.495
V
CC
V
CC
-
0.095
3.0
+100
V
V
IHD
V
ILD
V
ID
I
IH
, I
IL
Figure 2
Figure 2
V
IHD
- V
ILD
CLK_, or
CLK_
=
V
IHD
or V
ILD
V
V
V
µA
2
_______________________________________________________________________________________
1:5 Clock Driver with Selectable LVPECL
Inputs/Single-Ended Inputs and LVDS Outputs
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
- GND = 3V to 3.6V, outputs terminated with 100Ω
±1%,
unless otherwise noted. Typical values are at V
CC
- GND = 3.3V, V
IHD
=
V
CC
- 1.0V, V
ILD
= V
CC
- 1.5V, unless otherwise noted.) (Notes 1, 2, and 3)
PARAMETER
SYMBOL
CONDITIONS
-40°C
MIN
TYP
MAX
MIN
+25°C
TYP
MAX
MIN
+85°C
TYP
MAX
UNITS
MAX9310A
OUTPUTS (Q_,
Q_)
Output High
Voltage
Output Low
Voltage
Differential
Output Voltage
Change in V
OD
Between
Complementary
Output States
Output Offset
Voltage
Change in VOS
Between
Complementary
Output States
Output Short-
Circuit Current
REFERENCE
Reference
Voltage Output
POWER SUPPLY
Power-Supply
Current
I
CC
(Note 5)
45
75
48
75
51
75
mA
V
BB
I
BB
=
±0.65mA
(Note 4)
V
CC
-
1.38
V
CC
-
1.22
V
CC
-
1.38
V
CC
-
1.26
V
CC
-
1.40
V
CC
-
1.26
V
V
OH
V
OL
V
OD
Figure 2
Figure 2
V
OH
- V
OL
,
Figure 2
0.9
250
350
450
1.6
0.9
250
350
450
1.6
0.9
250
350
450
1.6
V
V
mV
∆V
OD
50
50
50
mV
V
OS
1.125
1.25
1.375
1.125
1.25
1.375
1.125
1.25
1.375
mV
∆VOCM
25
25
25
mV
Q_ shorted to
Q_
I
OSC
Q_ or
Q_
shorted
to GND
12
29
12
29
12
mA
29
_______________________________________________________________________________________
3
1:5 Clock Driver with Selectable LVPECL
Inputs/Single-Ended Inputs and LVDS Outputs
MAX9310A
AC ELECTRICAL CHARACTERISTICS
(V
CC
- GND = 3V to 3.6V, outputs terminated with 100Ω
±1%,
f
IN
≤
1.0GHz, input transition time = 125ps (20% to 80%),
V
IHD
- V
ILD
= 0.15V to V
CC
, unless otherwise noted. Typical values are at V
CC
- GND = 3.3V, V
IHD
= V
CC
- 1.0V, V
ILD
= V
CC
- 1.5V,
unless otherwise noted.) (Notes 1 and 6)
PARAMETER
Propagation
Delay CLK_,
CLK_
to Q_,
Q_
Output-to-
Output Skew
Part-to-Part
Skew
Added Random
Jitter
Added
Deterministic
Jitter
Operating
Frequency
Differential
Output Rise/Fall
Time
SYMBOL
t
PHL
,
t
PLH
t
SKOO
t
SKPP
CONDITIONS
-40°C
MIN
250
TYP
340
MAX
600
MIN
250
+25°C
TYP
340
MAX
600
MIN
250
+85°C
TYP
340
MAX
600
UNITS
Figure 2
ps
(Note 7)
(Note 8)
f
IN
= 1.0GHz,
clock pattern
(Note 9)
f
IN
= 1.0Gsps,
2
23
- 1 PRBS
pattern (Note 9)
V
OD
≥
250mV
20% to 80%,
Figure 2
1.0
10
30
145
8
25
145
20
45
145
ps
ps
ps
(RMS)
t
RJ
0.3
1.0
0.3
1.0
0.3
1.0
t
DJ
50
60
50
60
50
60
ps
(P-P)
GHz
f
MAX
1.0
1.0
t
R/tF
140
205
300
140
205
300
140
205
300
ps
Note 1:
Measurements are made with the device in thermal equilibrium.
Note 2:
Current into a pin is defined as positive. Current out of a pin is defined as negative.
Note 3:
DC parameters are production tested at +25°C. DC limits are guaranteed by design and
characterized over the full operating temperature range.
Note 4:
Use V
BB
only for inputs that are on the same device as the V
BB
reference.
Note 5:
All pins are open except V
CC
and GND, all outputs are loaded with 100Ω differentially.
Note 6:
Guaranteed by design and characterization. Limits are set to ±6 sigma.
Note 7:
Measured between outputs of the same part at the signal crossing points for a same-edge
transition.
Note 8:
Measured between outputs of different parts at the signal crossing points under identical conditions
for a same-edge transition.
Note 9:
Device jitter added to the input signal.
4
_______________________________________________________________________________________
1:5 Clock Driver with Selectable LVPECL
Inputs/Single-Ended Inputs and LVDS Outputs
MAX9310A
Typical Operating Characteristics
(V
CC
- GND = 3.3V, outputs terminated with 100Ω
±1%,
f
IN
= 1.0GHz, input transition time = 125ps (20% to 80%),V
IHD
= V
CC
- 1.0V,
V
ILD
= V
CC
- 1.5V, unless otherwise noted.)
DIFFERENTIAL OUTPUT VOLTAGE (V
OH
- V
OL
)
vs. FREQUENCY
MAX9310A toc01
MAX9310A toc02
SUPPLY CURRENT vs. TEMPERATURE
52
51
50
SUPPLY CURRENT (mA)
49
48
47
46
45
44
43
42
-40
-15
10
35
60
85
TEMPERATURE (°C)
ALL PINS ARE OPEN EXCEPT V
CC
AND GND OUTPUTS LOADED WITH 100Ω
DIFFERENTIAL
DIFFERENTIAL OUTPUT VOLTAGE (mV)
OUTPUT RISE/FALL vs. TEMPERATURE
f
IN
= 500MHz
215
MAX9310A toc03
450
400
350
300
250
200
150
100
50
0
0.25
0.50
0.75
1.00
1.25
1.50
220
RISE/FALL TIME (ps)
210
t
F
205
t
R
200
1.75
-40
-15
10
35
60
85
FREQUENCY (GHz)
TEMPERATURE (°C)
PROPAGATION DELAY vs. HIGH VOLTAGE
OF DIFFERENTIAL INPUT (V
IHD
)
MAX9310A toc04
PROPAGATION DELAY vs. TEMPERATURE
MAX9310A toc05
390
400
PROPAGATION DELAY (ps)
350
PROPAGATION DELAY (ps)
1.2
1.5
1.8
2.1
2.4
2.7
3.0
3.3
370
380
360
330
340
310
320
290
V
IHD
(V)
300
-40
-15
10
35
60
85
TEMPERATURE (°C)
_______________________________________________________________________________________
5
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