19-2220; Rev 1; 11/04
IT
TION K
VALUA
E
BLE
AVAILA
1:5 Differential LVPECL/LVECL/HSTL
Clock and Data Driver
General Description
Features
♦
+2.375V to +3.8V Supply for Differential
HSTL/LVPECL Operation
♦
-2.375V to -3.8V Supply for Differential LVECL
Operation
♦
Two Selectable Differential Inputs
♦
Synchronous Output Enable/Disable
♦
20ps Output-to-Output Skew
♦
360ps Propagation Delay
♦
Guaranteed 400mV Differential Output at 1.5GHz
♦
On-Chip Reference for Single-Ended Inputs
♦
Input Biased Low when Left Open
♦
Pin Compatible with MC100LVEP14
MAX9315
The MAX9315 low-skew, 1-to-5 differential driver is
designed for clock and data distribution. This device
allows selection between two inputs. The selected input
is reproduced at five differential outputs. The differential
inputs can be adapted to accept a single-ended input
by connecting the on-chip V
BB
supply to one input as a
reference voltage.
The MAX9315 features low output-to-output skew
(20ps), making it ideal for clock and data distribution
across a backplane or a board. For interfacing to differ-
ential HSTL and LVPECL signals, this device operates
over a +2.375V 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, this device operates with a -2.375V to -3.8V
supply.
The MAX9315 is offered in a space-saving 20-pin
TSSOP package.
Applications
Precision Clock Distribution
Low-Jitter Data Repeater
Data and Clock Driver and Buffer
Central Office Backplane Clock Distribution
DSLAM Backplane
Base Station
ATE
PART
MAX9315EUP
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
20 TSSOP
Pin Configuration
Typical Application Circuit
TOP VIEW
QO 1
Q0 2
MAX9315
20 V
CC
Q
D
19 EN
18 V
CC
17 CLK1
16 CLK1
15 V
BB
14 CLK0
13 CLK0
12 SEL
11 V
EE
TSSOP
MAX9315
Z
O
= 50Ω
Q_
RECEIVER
Q1 3
Q1 4
Q2 5
Z
O
= 50Ω
Q_
Q2 6
Q3 7
Q3 8
50Ω
50Ω
Q4 9
Q4 10
V
TT
= V
CC
- 2.0V
Functional Diagram appears at end of data sheet.
________________________________________________________________
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 Differential LVPECL/LVECL/HSTL
Clock and Data Driver
MAX9315
ABSOLUTE MAXIMUM RATINGS
V
CC
- V
EE
...............................................................................4.1V
Inputs (CLK_,
CLK_,
SEL,
EN)
to V
EE
...........................................(V
EE
- 0.3V) to (V
CC
+ 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)
Single-Layer PC Board
20-Pin TSSOP (derate 7.69mW/°C above +70°C) .......615mW
Multilayer PC Board
20-Pin TSSOP (derate 10.9mW/°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 ..........................................................+9.6°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
Soldering Temperature (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
- V
EE
= 2.375V to 3.8V, outputs loaded with 50Ω ±1% to V
CC
- 2V, SEL = high or low,
EN
= low, unless otherwise noted. Typical
values are at V
CC
- V
EE
= +3.3V, V
IHD
= V
CC
- 1V, V
ILD
= V
CC
- 1.5V.) (Notes 1, 2, 3)
PARAMETER
SYMBOL
CONDITIONS
-40°C
MIN
V
CC
-
1.225
V
EE
V
IH(MAX)
, V
IL(MIN)
-500
TYP
MAX
MIN
V
CC
-
1.225
V
EE
-500
+25°C
TYP
MAX
MIN
V
CC
-
1.225
V
EE
-500
+85°C
TYP
MAX
UNITS
SINGLE-ENDED INPUTS (SEL,
EN)
Input High Voltage
Input Low Voltage
Input Current
V
IH
V
IL
I
IN
V
CC
V
CC
-
1.625
500
V
CC
V
CC
-
1.625
500
V
CC
V
CC
-
1.625
500
V
V
µA
DIFFERENTIAL INPUTS (CLK_,
CLK_)
Single-Ended Input
High Voltage
(Note 4)
Single-Ended Input
Low Voltage
(Note 4)
High Voltage of
Differential Input
Low Voltage of
Differential Input
V
IH
V
BB
connected to
CLK_,
Figure 1
V
CC
-
1.225
V
CC
V
CC
-
1.225
V
CC
V
CC
-
1.225
V
CC
V
V
IL
V
BB
connected to
CLK_,
Figure 1
V
EE
V
EE
+
1.2
V
EE
V
CC
-
1.625
V
CC
V
CC
-
0.1
V
EE
V
EE
+
1.2
V
EE
V
CC
-
1.625
V
CC
V
CC
-
0.1
V
EE
V
EE
+
1.2
V
EE
V
CC
-
1.625
V
CC
V
CC
-
0.1
V
V
IHD
V
ILD
V
V
2
_______________________________________________________________________________________
1:5 Differential LVPECL/LVECL/HSTL
Clock and Data Driver
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
- V
EE
= 2.375V to 3.8V, outputs loaded with 50Ω ±1% to V
CC
- 2V, SEL = high or low,
EN
= low, unless otherwise noted. Typical
values are at V
CC
- V
EE
= +3.3V, V
IHD
= V
CC
- 1V, V
ILD
= V
CC
- 1.5V.) (Notes 1, 2, 3)
PARAMETER
SYMBOL
CONDITIONS
For (V
CC
- V
EE
)
<
+3.0V
For (V
CC
- V
EE
)
≥
+3.0V
V
IH
, V
IL
, V
IHD
, V
ILD
-40°C
MIN
0.1
0.1
-150
TYP
MAX
V
CC
-
V
EE
3.0
150
MIN
0.1
0.1
-150
+25°C
TYP
MAX
V
CC
-
V
EE
3.0
150
MIN
0.1
0.1
-150
+85°C
TYP
MAX
V
CC
-
V
EE
3.0
150
µA
UNITS
MAX9315
Differential Input
Voltage
Input Current
OUTPUTS (Q_,
Q_)
Single-Ended
Output High
Voltage
Single-Ended
Output Low
Voltage
Differential Output
Voltage
REFERENCE
Reference Voltage
Output (Note 5)
SUPPLY
Supply Current
(Note 6)
V
IHD
-
V
ILD
I
IN
V
V
OH
Figure 1
V
CC
-
1.145
V
CC
- V
CC
-
0.865 1.145
V
CC
- V
CC
-
0.865 1.145
V
CC
-
0.865
V
V
OL
V
OH
-
V
OL
Figure 1
V
CC
-
1.945
550
V
CC
- V
CC
-
1.695 1.945
910
550
V
CC
- V
CC
-
1.695 1.945
910
550
V
CC
-
1.695
910
V
Figure 1
mV
V
BB
I
BB
=
±0.5mA
V
CC
-
1.525
V
CC
- V
CC
-
1.325 1.525
V
CC
- V
CC
-
1.325 1.525
V
CC
-
1.325
V
I
EE
41
48
45
55
49
65
mA
_______________________________________________________________________________________
3
1:5 Differential LVPECL/LVECL/HSTL
Clock and Data Driver
MAX9315
AC ELECTRICAL CHARACTERISTICS
(V
CC
- V
EE
= 2.375V to 3.8V, outputs loaded with 50Ω ±1% to V
CC
- 2V, input frequency = 1.5GHz, input transition time = 125ps (20%
to 80%), SEL = high or low,
EN
= low, V
IHD
= V
EE
+ 1.2V to V
CC
, V
ILD
= V
EE
to V
CC
- 0.15V, V
IHD
- V
ILD
= 0.15V to the smaller of 3V or
V
CC
- V
EE
, unless otherwise noted. Typical values are at V
CC
- V
EE
= +3.3V, V
IHD
= V
CC
- 1V, V
ILD
= V
CC
- 1.5V.) (Notes 1, 7)
-40°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MIN
+25°C
TYP
MAX
MIN
+85°C
TYP
MAX
UNITS
ps
Differential Input-
to-Output Delay
Output-to-Output
Skew (Note 8)
Part-to-Part Skew
(Note 9)
Added Random
Jitter (Note 10)
Added
Deterministic Jitter
(Note 10)
Switching
Frequency
Output Rise/Fall
Time (20% to 80%)
t
PLHD
,
t
PHLD
t
SKOO
t
SKPP
t
RJ
Figure 2
290
400
310
440
300
520
ps
5
30
110
20
40
130
20
50
220
ps
ps
ps
(RMS)
f
IN
= 1.5GHz clock
1.5Gbps 2E
23
-1
PRBS pattern
(V
OH
- V
OL
)
≥
400mV,
Figure 2
Figure 2
0.8
1.2
0.8
1.2
0.8
1.2
t
DJ
50
70
50
70
50
70
ps (p-p)
f
MAX
1.5
1.5
1.5
GHz
t
R
, t
F
80
120
90
130
90
145
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 production tested at T
A
= +25°C and guaranteed by design over the full operating temperature range.
Note 4:
Single-ended input operation using V
BB
is limited to V
CC
- V
EE
= 3.0V to 3.8V.
Note 5:
Use V
BB
only for inputs that are on the same device as the V
BB
reference.
Note 6:
All pins open except V
CC
and V
EE
.
Note 7:
Guaranteed by design and characterization. Limits are set at ±6 sigma.
Note 8:
Measured between outputs of the same part at the signal crossing points for a same-edge transition.
Note 9:
Measured between outputs of different parts at the signal crossing points under identical conditions for a same-edge transition.
Note 10:
Device jitter added to the input signal.
4
_______________________________________________________________________________________
1:5 Differential LVPECL/LVECL/HSTL
Clock and Data Driver
MAX9315
Typical Operating Characteristics
(V
CC
= +3.3V, V
EE
= 0, V
IHD
= V
CC
- 1V, V
ILD
= V
CC
- 1.15V, input transition time = 125ps (20% to 80%), f
IN
= 2GHz, outputs loaded
with 50Ω to V
CC
- 2V, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
MAX9315 toc01
DIFFERENTIAL OUTPUT VOLTAGE (V
OH
- V
OL
)
vs. FREQUENCY
MAX9315 toc02
TRANSITION TIME vs. TEMPERATURE
MAX9315 toc03
50
49
48
SUPPLY CURRENT (mA)
47
46
45
44
43
42
41
40
-40
-15
10
35
60
ALL PINS ARE
OPEN EXCEPT
V
CC
AND V
EE
900
DIFFERENTIAL OUTPUT VOLTAGE (mV)
800
700
600
500
400
300
200
100
0
0
0.5
1.0
1.5
2.0
2.5
140
130
TRANSITION TIME (ps)
120
t
R
110
100
t
F
90
80
85
3.0
-40
-15
10
35
60
85
TEMPERATURE (°C)
FREQUENCY (GHz)
TEMPERATURE (°C)
PROPAGATION DELAY vs. HIGH VOLTAGE
OF DIFFERENTIAL INPUT (V
IHD
)
MAX9315 toc04
PROPAGATION DELAY vs. TEMPERATURE
MAX9315 toc05
370
390
380
PROPAGATION DELAY (ps)
370
360
350
340
330
PROPAGATION DELAY (ps)
364
358
352
346
340
1.2
1.5
1.8
2.1
2.4
2.7
3.0
3.3
V
IHD
(V)
-40
-15
10
35
60
85
TEMPERATURE (°C)
_______________________________________________________________________________________
5
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