19-1927; Rev 0; 2/01
Quad LVDS Line Driver with
Flow-Through Pinout
General Description
The MAX9123 quad low-voltage differential signaling
(LVDS) differential line driver is ideal for applications
requiring high data rates, low power, and low noise. The
MAX9123 is guaranteed to transmit data at speeds up to
800Mbps (400MHz) over controlled impedance media of
approximately 100Ω. The transmission media may be
printed circuit (PC) board traces, backplanes, or cables.
The MAX9123 accepts four LVTTL/LVCMOS input levels
and translates them to LVDS output signals. Moreover,
the MAX9123 is capable of setting all four outputs to a
high-impedance state through two enable inputs, EN and
EN,
thus dropping the device to an ultra-low-power state
of 16mW (typ) during high impedance. The enables are
common to all four transmitters. Outputs conform to the
ANSI TIA/EIA-644 LVDS standard. Flow-through pinout
simplifies PC board layout and reduces crosstalk by sep-
arating the LVTTL/LVCMOS inputs and LVDS outputs.
The MAX9123 operates from a single +3.3V supply and is
specified for operation from -40°C to +85°C. It is available
in 16-pin TSSOP and SO packages. Refer to the MAX9121/
MAX9122* data sheet for quad LVDS line receivers with
integrated termination and flow-through pinout.
o
Flow-Through Pinout
Simplifies PC Board Layout
Reduces Crosstalk
o
Pin Compatible with DS90LV047A
o
Guaranteed 800Mbps Data Rate
o
250ps Maximum Pulse Skew
o
Conforms to TIA/EIA-644 LVDS Standard
o
Single +3.3V Supply
o
16-Pin TSSOP and SO Packages
Features
MAX9123
Ordering Information
PART
MAX9123EUE
MAX9123ESE
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 TSSOP
16 SO
Applications
Digital Copiers
Laser Printers
Cell Phone Base
Stations
Add Drop Muxes
Digital Cross-Connects
DSLAMs
Network
Switches/Routers
Backplane
Interconnect
Clock Distribution
Typical Applications Circuit
LVDS SIGNALS
MAX9122*
MAX9123
T
X
107Ω
R
X
Pin Configuration
TOP VIEW
EN 1
IN1 2
IN2 3
V
CC
4
GND 5
IN3 6
IN4 7
EN 8
16 OUT1-
15 OUT1+
14 OUT2+
LVTTL/CMOS
DATA INPUT
T
X
107Ω
R
X
LVTTL/CMOS
DATA OUTPUT
T
X
107Ω
R
X
MAX9123
13 OUT2-
12 OUT3-
11 OUT3+
10 OUT4+
9
OUT4-
100Ω SHIELDED TWISTED CABLE OR MICROSTRIP PC BOARD TRACES
T
X
107Ω
R
X
TSSOP/SO
* Future product—contact factory for availability.
________________________________________________________________
Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Quad LVDS Line Driver with
Flow-Through Pinout
MAX9123
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ...........................................................-0.3V to +4.0V
IN_, EN,
EN
to GND....................................-0.3V to (V
CC
+ 0.3V)
OUT_+, OUT_- to GND..........................................-0.3V to +3.9V
Short-Circuit Duration (OUT_+, OUT_-) .....................Continuous
Continuous Power Dissipation (T
A
= +70°C)
16-Pin TSSOP (derate 9.4mW/°C above +70°C) .........755mW
16-Pin SO (derate 8.7mW/°C above +70°C)................696mW
Storage Temperature Range .............................-65°C to +150°C
Maximum Junction Temperature .....................................+150°C
Operating Temperature Range ...........................-40°C to +85°C
Lead Temperature (soldering, 10s) .................................+300°C
ESD Protection
Human Body Model, IN_, OUT_+, OUT_-.......................±4kV
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%, T
A
= -40°C to +85°C. Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless otherwise
noted.) (Notes 1, 2)
PARAMETER
LVDS OUTPUT (OUT_+, OUT_-)
Differential Output Voltage
Change in Magnitude of V
OD
Between Complementary Output
States
Offset Voltage
Change in Magnitude of V
OS
Between Complementary Output
States
Output High Voltage
Output Low Voltage
Differential Output Short-Circuit
Current (Note 3)
Output Short-Circuit Current
Output High-Impedance Current
Power-Off Output Current
INPUTS (IN_, EN,
EN)
High-Level Input Voltage
Low-Level Input Voltage
Input Current
SUPPLY CURRENT
No-Load Supply Current
Loaded Supply Current
Disabled Supply Current
I
CC
I
CCL
I
CCZ
R
L
=
∞,
IN_ = V
CC
or 0 for all channels
R
L
= 100Ω, IN_ = V
CC
or 0 for all channels
Disabled, IN_ = V
CC
or 0 for all channels,
EN = 0,
EN
= V
CC
9.2
22.7
4.9
11
30
6
mA
mA
mA
V
IH
V
IL
I
IN
IN_, EN,
EN
= 0 or V
CC
2.0
GND
-20
V
CC
0.8
20
V
V
µA
V
OD
∆V
OD
V
OS
∆V
OS
V
OH
V
OL
I
OSD
I
OS
I
OZ
I
OFF
Enabled, V
OD
= 0
OUT_+ = 0 at IN_ = V
CC
or OUT_- = 0 at IN_
= 0, enabled
EN = low and
EN
= high, OUT_+ = 0 or V
CC
,
OUT_- = 0 or V
CC
, R
L
=
∞
V
CC
= 0 or open, OUT_+ = 0 or 3.6V, OUT_-
= 0 or 3.6V, R
L
=
∞
-10
-20
-3.8
0.90
-9
-9
10
20
Figure 1
Figure 1
Figure 1
Figure 1
1.125
250
368
1
1.25
4
450
35
1.375
25
1.6
mV
mV
V
mV
V
V
mA
mA
µA
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
Quad LVDS Line Driver with
Flow-Through Pinout
SWITCHING CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, R
L
= 100Ω ±1%, C
L
= 15pF, T
A
= -40°C to +85°C. Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless
otherwise noted.) (Notes 4, 5, 6)
PARAMETER
Differential Propagation Delay
High to Low
Differential Propagation Delay
Low to High
Differential Pulse Skew (Note 7)
Differential Channel-to-Channel
Skew (Note 8)
Differential Part-to-Part Skew
(Note 9)
Differential Part-to-Part Skew
(Note 10)
Rise Time
Fall Time
Disable Time High to Z
Disable Time Low to Z
Enable Time Z to High
Enable Time Z to Low
Maximum Operating Frequency
(Note 11)
SYMBOL
t
PHLD
t
PLHD
t
SKD1
t
SKD2
t
SKD3
t
SKD4
t
TLH
t
THL
t
PHZ
t
PLZ
t
PZH
t
PZL
f
MAX
CONDITIONS
Figures 2 and 3
Figures 2 and 3
Figures 2 and 3
Figures 2 and 3
Figures 2 and 3
Figures 2 and 3
Figures 2 and 3
Figures 2 and 3
Figures 4 and 5
Figures 4 and 5
Figures 4 and 5
Figures 4 and 5
400
0.2
0.2
MIN
0.7
0.7
0.04
0.07
0.13
0.43
0.39
0.39
2.7
2.7
2.3
2.3
TYP
MAX
1.7
1.7
0.25
0.35
0.8
1.0
1.0
1.0
5
5
7
7
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
MAX9123
Note 1:
Maximum and minimum limits over temperature are guaranteed by design and characterization. Devices are 100% tested
at T
A
= +25°C.
Note 2:
Currents into the device are positive, and current out of the device is negative. All voltages are referenced to ground except
V
OD
.
Note 3:
Guaranteed by correlation data.
Note 4:
AC parameters are guaranteed by design and characterization.
Note 5:
C
L
includes probe and jig capacitance.
Note 6:
Signal generator conditions for dynamic tests: V
OL
= 0, V
OH
= 3V, f = 100MHz, 50% duty cycle, R
O
= 50Ω, t
R
≤
1ns, t
F
≤
1ns (0% to 100%).
Note 7:
t
SKD1
is the magnitude difference of differential propagation delay. t
SKD1
= |t
PHLD
- t
PLHD
|.
Note 8:
t
SKD2
is the magnitude difference of t
PHLD
or t
PLHD
of one channel to the t
PHLD
or t
PLHD
of another channel on the same
device.
Note 9:
t
SKD3
is the magnitude difference of any differential propagation delays between devices at the same V
CC
and within 5°C
of each other.
Note 10:
t
SKD4
is the magnitude difference of any differential propagation delays between devices operating over the rated supply
and temperature ranges.
Note 11:
f
MAX
signal generator conditions: V
OL
= 0, V
OH
= 3V, f = 400MHz, 50% duty cycle, R
O
= 50Ω, t
R
≤
1ns, t
F
≤
1ns (0% to
100%). Transmitter output criteria: duty cycle = 45% to 55%, V
OD
≥
250mV.
_______________________________________________________________________________________
3
Quad LVDS Line Driver with
Flow-Through Pinout
MAX9123
Typical Operating Characteristics
(V
CC
= +3.3V, R
L
= 100Ω, C
L
= 15pF, T
A
= +25°C, unless otherwise noted.)
OUTPUT HIGH VOLTAGE
vs. POWER-SUPPLY VOLTAGE
MAX9123 toc01
OUTPUT LOW VOLTAGE
vs. POWER-SUPPLY VOLTAGE
MAX9123 toc02
OUTPUT SHORT-CIRCUIT CURRENT
vs. POWER-SUPPLY VOLTAGE
OUTPUT SHORT-CIRCUIT CURRENT (mA)
-3.695
-3.690
-3.685
-3.680
-3.675
-3.670
-3.665
-3.660
-3.655
-3.650
3.0
3.3
POWER-SUPPLY VOLTAGE (V)
3.6
V
IN
= V
CC
or
GND
MAX9123 toc03
1.100
1.100
-3.700
OUTPUT HIGH VOLTAGE (V)
1.096
OUTPUT LOW VOLTAGE (V)
1.098
1.098
1.096
1.094
1.094
1.092
1.092
1.090
3.0
3.3
POWER-SUPPLY VOLTAGE (V)
3.6
1.090
3.0
3.3
POWER-SUPPLY VOLTAGE (V)
3.6
OUTPUT HIGH-IMPEDANCE STATE CURRENT
vs. POWER-SUPPLY VOLTAGE
OUTPUT HIGH-IMPEDANCE STATE CURRENT (pA)
MAX9123 toc04
DIFFERENTIAL OUTPUT VOLTAGE
vs. POWER SUPPLY
MAX9123 toc05
DIFFERENTIAL OUTPUT VOLTAGE
vs. LOAD RESISTOR
DIFFERENTIAL OUTPUT VOLTAGE (mV)
MAX9123 toc06
0
V
IN
= V
CC
or
GND
-50
390
DIFFERENTIAL OUTPUT VOLTAGE (V)
385
380
375
370
365
360
355
350
3.0
3.3
POWER-SUPPLY VOLTAGE (V)
600
550
500
450
400
350
300
-100
-150
-200
-250
3.0
3.3
POWER-SUPPLY VOLTAGE (V)
3.6
3.6
90
100
110
120
130
140
150
LOAD RESISTOR (Ω)
OFFSET VOLTAGE
vs. POWER-SUPPLY VOLTAGE
MAX9123 toc07
POWER-SUPPLY CURRENT
vs. FREQUENCY
MAX9123 toc08
POWER-SUPPLY CURRENT
vs. POWER-SUPPLY VOLTAGE
FREQ = 1MHz
V
IN
= 0 to 3V
MAX9123 toc09
1.260
40
38
POWER-SUPPLY CURRENT (mA)
25.0
POWER-SUPPLY CURRENT (mA)
V
IN
= 0 to 3V
1.256
OFFSET VOLTAGE (V)
35
33
30
28
ALL SWITCHING
25
23
ONE SWITCHING
24.0
1.252
23.0
1.248
22.0
1.244
21.0
1.240
3.0
3.3
POWER-SUPPLY VOLTAGE (V)
3.6
20
0.1
1
10
FREQUENCY (MHz)
100
1000
20.0
3.0
3.3
POWER-SUPPLY VOLTAGE (V)
3.6
4
_______________________________________________________________________________________
Quad LVDS Line Driver with
Flow-Through Pinout
Typical Operating Characteristics (continued)
(V
CC
= +3.3V, R
L
= 100Ω, C
L
= 15pF, T
A
= +25°C, unless otherwise noted.)
POWER-SUPPLY CURRENT
vs. AMBIENT TEMPERATURE
MAX9123 toc10
MAX9123
DIFFERENTIAL PROPAGATION DELAY
vs. POWER SUPPLY
MAX9123 toc11
DIFFERENTIAL PROPAGATION DELAY
vs. AMBIENT TEMPERATURE
DIFFERENTIAL PROPAGATION DELAY (ns)
MAX9123 toc12
25.0
POWER-SUPPLY CURRENT (mA)
FREQ = 1MHz
V
IN
= 0 to 3V
1.600
DIFFERENTIAL PROPAGATION DELAY (ns)
1.550
1.500
1.450
1.400
1.350
1.300
1.250
1.200
3.0
3.3
POWER-SUPPLY VOLTAGE (V)
t
PHLD
t
PLHD
FREQ = 1MHz
1.600
24.0
1.500
t
PLHD
1.400
23.0
22.0
1.300
t
PHLD
FREQ = 1MHz
21.0
1.200
20.0
-40
-15
10
35
60
85
AMBIENT TEMPERATURE (°C)
1.100
3.6
-40
-15
10
35
60
85
AMBIENT TEMPERATURE (°C)
DIFFERENTIAL SKEW
vs. POWER-SUPPLY VOLTAGE
MAX9123 toc13
DIFFERENTIAL SKEW
vs. AMBIENT TEMPERATURE
175
DIFFERENTIAL SKEW (ps)
150
125
100
75
50
25
FREQ = 1MHz
MAX9123 toc14
100
FREQ = 1MHz
80
DIFFERENTIAL SKEW (ps)
200
60
40
20
0
3.0
3.3
POWER-SUPPLY VOLTAGE (V)
3.6
0
-40
-15
10
35
60
85
AMBIENT TEMPERATURE (°C)
TRANSITION TIME
vs. POWER-SUPPLY VOLTAGE
MAX9123 toc15
TRANSITION TIME
vs. AMBIENT TEMPERATURE
FREQ = 1MHz
550
TRANSITION TIME (ps)
500
450
400
350
300
t
THL
t
TLH
MAX9123 toc16
400
FREQ = 1MHz
390
TRANSITION TIME (ps)
380
370
t
THL
360
350
340
3.0
3.3
POWER-SUPPLY VOLTAGE (V)
t
TLH
600
250
200
3.6
-40
-15
10
35
60
85
AMBIENT TEMPERATURE (°C)
_______________________________________________________________________________________
5
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