19-2213; Rev 0; 10/01
Low-Jitter, Low-Noise LVDS
Repeater in an SC70 Package
General Description
The MAX9155 is a low-voltage differential signaling
(LVDS) repeater, which accepts a single LVDS input
and duplicates the signal at a single LVDS output. Its
low-jitter, low-noise performance makes it ideal for
buffering LVDS signals sent over long distances or
noisy environments, such as cables and backplanes.
The MAX9155’s tiny size makes it especially suitable for
minimizing stub lengths in multidrop backplane appli-
cations. The SC70 package (half the size of a SOT23)
allows the MAX9155 to be placed close to the connec-
tor, thereby minimizing stub lengths and reflections on
the bus. The point-to-point connection between the
MAX9155 output and the destination IC, such as an
FPGA or ASIC, allows the destination IC to be located
at greater distances from the bus connector.
Ultra-low, 23ps
p-p
added deterministic jitter and
0.6ps
RMS
added random jitter ensure reliable commu-
nication in high-speed links that are highly sensitive to
timing errors, especially those incorporating clock-and-
data recovery, PLLs, serializers, or deserializers. The
MAX9155’s switching performance guarantees a
200Mbps data rate, but minimizes radiated noise by
guaranteeing 0.5ns minimum output transition time.
The MAX9155 has fail-safe circuitry that sets the output
high for undriven open, short, or terminated inputs.
The MAX9155 operates from a single +3.3V supply and
consumes only 10mA over a -40°C to +85°C tempera-
ture range. Refer to the MAX9129 data sheet for a quad
bus LVDS driver, and to the MAX9156 data sheet for a
low-jitter, low-noise LVPECL-to-LVDS level translator in
an SC70 package.
o
Tiny SC70 Package
o
Ultra-Low Jitter
23ps
p-p
Added Deterministic Jitter
(2
23
-1 PRBS)
0.6ps
RMS
Added Random Jitter
o
0.5ns (min) Transition Time Minimizes Radiated
Noise
o
200Mbps Guaranteed Data Rate
o
Fail-Safe Circuit Sets Output High for Undriven
Inputs (Open, Terminated, or Shorted)
o
Low 10mA Supply Current
o
Low 6mA Supply Current in Fail-Safe
o
Conforms to ANSI/EIA/TIA-644 LVDS Standard
o
High-Impedance Inputs and Outputs in
Power-Down Mode
Features
MAX9155
Ordering Information
PART
MAX9155EXT-T
TEMP. RANGE
-40°C to +85°C
PIN-
PACKAGE
6 SC70-6
TOP
MARK
ABC
Applications
Cellular Phone Base Stations
DSLAMs
Digital Cross-Connects
Add/Drop Muxes
Network Switches/Routers
Multidrop Buses
Cable Repeaters
IN- 3
GND 2
Pin Configuration
TOP VIEW
MAX9155
OUT- 1
6
OUT+
5
V
CC
4
IN+
Typical Operating Circuit appears at end of data sheet.
SC70
________________________________________________________________
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.
Low-Jitter, Low-Noise LVDS
Repeater in an SC70 Package
MAX9155
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ...........................................................-0.3V to +4.0V
IN+, IN- to GND.....................................................-0.3V to +4.0V
OUT+, OUT- to GND .............................................-0.3V to +4.0V
Short-Circuit Duration (OUT+, OUT-) .........................Continuous
Continuous Power Dissipation (T
A
= +70°C)
6-Pin SC70 (derate 3.1mW/°C above +70°C) ..............245mW
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Operating Temperature Range ...........................-40°C to +85°C
ESD Protection
Human Body Model, IN+, IN-, OUT+, OUT- ....................±8kV
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
= +3.0V to +3.6V, R
L
= 100Ω ±1%,
|
V
ID
|
= 0.05V to 1.2V, V
CM
=
|
V
ID
/ 2
|
to 2.4V -
|
V
ID
/ 2
|
, T
A
= -40°C to +85°C, unless otherwise
noted. Typical values are at V
CC
= +3.3V, T
A
= +25°C.) (Notes 1, 2)
PARAMETER
LVDS INPUT
Differential Input High Threshold
Differential Input Low Threshold
Input Current
Power-Off Input Current
Input Resistor 1
Input Resistor 2
LVDS OUTPUT
Differential Output Voltage
Change in V
OD
Between
Complementary Output States
Offset (Common-Mode) Voltage
Change in V
OS
for
Complementary Output States
Output High Voltage
Output Low Voltage
Fail-Safe Differential Output
Voltage
Power-Off Output Leakage
Current
Differential Output Resistance
Output Short Current
POWER SUPPLY
Supply Current
Supply Current in Fail-Safe
I
CC
I
CCF
Output loaded
Output loaded, input undriven
10
6
15
8
mA
mA
V
OD
∆V
OD
V
OS
∆V
OS
V
OH
V
OL
V
OD+
IO
OFF
RO
DIFF
I
SC
IN+, IN- shorted, open, or parallel
terminated
V
CC
= 0
OUT+ = 3.6V, other output open
OUT- = 3.6V, other output open
0.9
+250
-10
-10
100
Figure 2
Figure 2
Figure 2
Figure 2
1.125
250
360
0.008
1.25
0.005
1.44
1.08
+360
0.02
0.02
260
-5
-5
+450
10
10
400
-15
-15
450
25
1.375
25
1.6
mV
mV
V
mV
V
V
mV
µA
Ω
mA
V
TH
V
TL
I
IN+
, I
IN-
I
IN+
, I
IN-
R
IN1
R
IN2
0.05V
≤
|
V
ID
|
≤
0.6V
0.6V<
|
V
ID
|
≤
1.2V,
0.05V
≤
|
V
ID
|
≤0.6V,
V
CC
= 0
0.6V <
|
V
ID
|
≤
1.2V, V
CC
= 0
V
CC
= +3.6V or 0, Figure 1
V
CC
= +3.6V or 0, Figure 1
-50
-15
-20
-15
-20
67
267
7
-7
-2.5
-3.5
1.3
2.6
232
1174
15
20
15
20
50
mV
mV
µA
µA
kΩ
kΩ
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
CC
= +3.6V or 0
V
ID
= +50mV, OUT+ = GND
V
ID
= -50mV, OUT- = GND
2
_______________________________________________________________________________________
Low-Jitter, Low-Noise LVDS
Repeater in an SC70 Package
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, R
L
= 100Ω ±1%, C
L
= 10pF,
|
V
ID
|
= 0.15V to 1.2V, V
CM
=
|
V
ID
/ 2
|
to 2.4V -
|
V
ID
/ 2
|
, T
A
= -40°C to +85°C,
unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25°C.) (Notes 3, 4, 5) (Figures 3, 4)
PARAMETER
Differential Propagation Delay High to
Low
Differential Propagation Delay Low to
High
Added Deterministic Jitter (Notes 6, 11)
Added Random Jitter (Notes 7, 11)
Differential Part-to-Part Skew (Note 8)
Differential Part-to-Part Skew (Note 9)
Switching Supply Current
Rise Time
Fall Time
Input Frequency (Note 10)
SYMBOL
t
PHLD
t
PLHD
t
DJ
t
RJ
t
SKPP1
t
SKPP2
I
CCSW
t
TLH
t
THL
f
MAX
0.5
0.5
100
11.3
0.66
0.64
200Mbps 2
23
-1 PRBS data pattern
f
IN
= 100MHz
CONDITIONS
MIN
1.3
1.3
TYP
2.0
2.0
23
0.6
0.17
MAX
2.8
2.8
100
2.9
0.6
1.5
18
1.0
1.0
UNITS
ns
ns
ps
p-p
ps
RMS
ns
ns
mA
ns
ns
MHz
MAX9155
Note 1:
All devices are 100% tested at T
A
= +25°C. Limits over temperature are guaranteed by design and characterization.
Note 2:
Current into a pin is defined as positive. Current out of a pin is defined as negative. All voltages are referenced to ground
except V
TH
, V
TL
, V
OD
, and
∆V
OD
.
Note 3:
Guaranteed by design and characterization.
Note 4:
Signal generator output (unless otherwise noted): frequency = 100MHz, 50% duty cycle, R
O
= 50Ω, t
R
= 1.5ns, and t
F
=
1.5ns (0% to 100%).
Note 5:
C
L
includes scope probe and test jig capacitance.
Note 6:
Signal generator output for t
DJ
: V
OD
= 150mV, V
OS
= 1.2V, t
DJ
includes pulse (duty-cycle) skew.
Note 7:
Signal generator output for t
RJ
: V
OD
= 150mV, V
OS
= 1.2V.
Note 8:
t
SKPP1
is the magnitude difference of any differential propagation delays between devices operating over rated conditions
at the same supply voltage, input common-mode voltage, and ambient temperature.
Note 9:
t
SKPP2
is the magnitude difference of any differential propagation delays between devices operating over rated conditions.
Note 10:
Device meets V
OD
DC specification and AC specifications while operating at f
MAX
.
Note 11:
Jitter added to the input signal.
_______________________________________________________________________________________
3
Low-Jitter, Low-Noise LVDS
Repeater in an SC70 Package
MAX9155
Typical Operating Characteristics
(V
CC
= +3.3V, R
L
= 100Ω ±1%, C
L
= 10pF,
|
V
ID
|
= 0.2V, V
CM
= 1.2V, T
A
= +25°C, unless otherwise noted. Signal generator output:
frequency = 100MHz, 50% duty cycle, R
O
= 50Ω, t
R
= 1.5ns, and t
F
= 1.5ns (0% to 100%), unless otherwise noted.)
SUPPLY CURRENT
VS.
INPUT FREQUENCY
MAX9155 toc01
SWITCHING SUPPLY CURRENT
VS.
TEMPERATURE
MAX9155 toc02
OUTPUT SHORT-CIRCUIT CURRENT
VS.
SUPPLY VOLTAGE
OUTPUT SHORT-CIRCUIT CURRENT (mA)
MAX9155 toc03
21
18
SUPPLY CURRENT (mA)
15
12
9
6
3
0
0
12.00
11.75
SUPPLY CURRENT (mA)
11.50
11.25
11.00
10.75
10.50
10.25
10.00
5.10
5.09
5.08
5.07
5.06
5.05
-40
-15
10
35
60
85
3.0
3.1
3.2
3.3
3.4
3.5
3.6
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
25 50 75 100 125 150 175 200 225 250
INPUT FREQUENCY (MHz)
FAIL-SAFE SUPPLY CURRENT
VS.
SUPPLY VOLTAGE
MAX9155 toc04
OUTPUT LOW VOLTAGE
VS.
SUPPLY VOLTAGE
MAX9155 toc05
OUTPUT HIGH VOLTAGE
VS.
SUPPLY VOLTAGE
1.525
OUTPUT HIGH VOLTAGE (V)
1.500
1.475
1.450
1.425
1.400
1.375
1.350
MAX9155 toc06
6.5
1.12
1.11
OUTPUT LOW VOLTAGE (V)
1.10
1.09
1.08
1.07
1.06
1.550
6.3
SUPPLY CURRENT (mA)
6.1
5.9
5.7
5.5
3.0
3.1
3.2
3.3
3.4
3.5
3.6
SUPPLY VOLTAGE (V)
1.05
3.0
3.1
3.2
3.3
3.4
3.5
3.6
SUPPLY VOLTAGE (V)
3.0
3.1
3.2
3.3
3.4
3.5
3.6
SUPPLY VOLTAGE (V)
DIFFERENTIAL PROPAGATION DELAY
VS.
SUPPLY VOLTAGE
MAX9155 toc07
DIFFERENTIAL PROPAGATION DELAY
VS.
TEMPERATURE
MAX9155 toc08
TRANSITION TIME
VS.
SUPPLY VOLTAGE
t
THL
725
TRANSITION TIME (ps)
700
675
650
625
600
575
t
TLH
MAX9155 toc09
2.1
DIFFERENTIAL PROPAGATION DELAY (ns)
t
PHLD
2.0
2.5
DIFFERENTIAL PROPAGATION DELAY (ns)
750
2.3
2.1
1.9
t
PLHD
t
PHLD
1.9
t
PLHD
1.7
1.8
1.7
3.0
3.1
3.2
3.3
3.4
3.5
3.6
SUPPLY VOLTAGE (V)
1.5
-40
-15
10
35
60
85
TEMPERATURE (°C)
550
3.0
3.1
3.2
3.3
3.4
3.5
3.6
SUPPLY VOLTAGE (V)
4
_______________________________________________________________________________________
Low-Jitter, Low-Noise LVDS
Repeater in an SC70 Package
MAX9155
Typical Operating Characteristics (continued)
(V
CC
= +3.3V, R
L
= 100Ω ±1%, C
L
= 10pF,
|
V
ID
|
= 0.2V, V
CM
= 1.2V, T
A
= +25°C, unless otherwise noted. Signal generator output:
frequency = 100MHz, 50% duty cycle, R
O
= 50Ω, t
R
= 1.5ns, and t
F
= 1.5ns (0% to 100%), unless otherwise noted.)
TRANSITION TIME
VS.
TEMPERATURE
MAX9155 toc10
DIFFERENTIAL OUTPUT VOLTAGE
VS.
LOAD RESISTOR
DIFFERENTIAL OUTPUT VOLTAGE (mV)
MAX9155 toc11
800
750
TRANSITION TIME (ps)
700
650
600
550
500
450
400
-40
-15
10
35
60
t
TLH
, t
THL
600
500
400
300
200
100
0
85
25
50
75
100
125
150
TEMPERATURE (°C)
LOAD RESISTOR (Ω)
Pin Description
PIN
1
2
3
4
5
6
NAME
OUT-
GND
IN-
IN+
V
CC
OUT+
Ground
Inverting LVDS Input
Noninverting LVDS Input
Power Supply. Bypass V
CC
to GND
with 0.01µF ceramic capacitor.
Noninverting LVDS Output
FUNCTION
Inverting LVDS Output
Detailed Description
The LVDS interface standard is a signaling method
intended for point-to-point communication over a con-
trolled-impedance medium, as defined by the ANSI/
TIA/EIA-644 and IEEE 1596.3 standards. The LVDS
standard uses a lower voltage swing than other com-
mon communication standards, achieving higher data
rates with reduced power consumption while reducing
EMI emissions and system susceptibility to noise.
The MAX9155 is a 200Mbps LVDS repeater intended
for high-speed, point-to-point, low-power applications.
The MAX9155 accepts an LVDS input and reproduces
an LVDS signal at the output. This device is capable of
detecting differential signals as low as 50mV and as
high as 1.2V within a 0 to 2.4V input voltage range. The
LVDS standard specifies an input voltage range of 0 to
2.4V referenced to ground.
Table 1. Function Table for LVDS Fail-Safe
Input (Figure 2)
INPUT, V
ID
> 50mV
< -50mV
50mV
>
V
ID
>
-50mV
Undriven open, short, or terminated
OUTPUT, V
OD
High
Low
Indeterminate
High
Fail-Safe
Fail-safe is a feature that puts the output in a known
logic state (differential high) under certain fault condi-
tions. The MAX9155 outputs are differential high when
the inputs are undriven and open, terminated, or shorted
(Table 1).
Note:
V
ID
= (IN+ - IN-), V
OD
= (OUT+ - OUT-)
High = 450mV
≥
V
OD
≥
250mV
Low = -250mV
≥
V
OD
≥
-450mV
_______________________________________________________________________________________
5
