19-2856; Rev 0; 4/03
Quad LVDS Line Driver with High-ESD
Tolerance and Flow-Through Pinout
General Description
The MAX9178 quad low-voltage differential signaling
(LVDS) line driver with high-ESD tolerance is ideal for
applications requiring high data rates and low power
with reduced noise. The MAX9178 is guaranteed to
transmit data at speeds up to 400Mbps (200MHz) over
controlled impedance of media of approximately 100Ω.
The transmission media can be printed circuit (PC)
board traces, backplanes, or cables.
The MAX9178 accepts four LVTTL/LVCMOS inputs and
translates them to LVDS output signals. All inputs toler-
ate overshoot of V
CC
+1V and undershoot of -1V. The
EN and
EN
inputs are ANDed together and control the
high-impedance outputs. When the device is disabled,
power drops to ultra-low 12.6mW (typ). Outputs con-
form to the ANSI TIA/EIA-644 LVDS standard.
The MAX9178 operates from a single +3.3V supply,
and is available in a 16-pin TSSOP and 16-pin thin QFN
package with exposed pad. The MAX9178 is specified
for operation from -40°C to +85°C.
Features
o
Flow-Through Pinout
Simplifies PC Board Layout
Reduces Crosstalk
o
Pin Compatible with DS90LV047A and MAX9123
o
Guaranteed 400Mbps Data Rate
o
Single-Ended Inputs Tolerate 1V
Overshoot/Undershoot
o
250ps Maximum Pulse Skew
o
IEC 61000-4-2 Level 4 ESD Tolerance on LVDS
Outputs
o
Conforms to ANSI TIA/EIA-644 LVDS Standard
o
Single +3.3V Supply
MAX9178
Ordering Information
PART
MAX9178EUE
MAX9178ETE
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 TSSOP
16 Thin QFN-EP*
Applications
Digital Copiers
Laser Printers
Cell Phone Base
Stations
Add/Drop Muxes
Digital Cross-Connects
DSLAMs
Network
Switches/Routers
Backplane
Interconnect
Clock Distribution
*EP
= Exposed pad.
Typical Application Circuit
LVDS SIGNALS
MAX9122
MAX9178
Functional Diagram appears at end of data sheet.
T
X
107Ω
R
X
Pin Configurations
OUT1+
OUT1-
T
X
107Ω
R
X
TOP VIEW
IN1
16
EN
1
IN1
2
IN2
3
V
CC
4
GND
5
IN3
6
IN4
7
EN 8
16
OUT1-
15
OUT1+
14
OUT2+
13
OUT2-
V
CC
GND
IN3
2
3
4
5
IN4
6
EN
IN2
1
15
EN
14
13
LVTTL/CMOS
DATA INPUT
LVTTL/CMOS
DATA OUTPUT
12
OUT2+
11
OUT2-
T
X
107Ω
R
X
MAX9178
12
OUT3-
11
OUT3+
10
OUT4+
9
OUT4-
MAX9178
EXPOSED PAD
10
OUT3-
9
OUT3+
T
X
7
OUT4-
8
OUT4+
107Ω
R
X
TSSOP
QFN
100Ω SHIELDED TWISTED CABLE OR MICROSTRIP PC BOARD TRACES
________________________________________________________________
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.
Quad LVDS Line Driver with High-ESD
Tolerance and Flow-Through Pinout
MAX9178
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ...........................................................-0.3V to +4.0V
IN_, EN,
EN
to GND....................................-1.4V to (V
CC
+ 1.4V)
OUT_ to GND ........................................................-0.3V to +4.0V
Short-Circuit Duration (OUT_) ....................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
16-Pin TSSOP (derate 9.4mW/
o
C above +70°C) .........755mW
16-Pin QFN (derate 16.9mW/
o
C above +70°C) .........1349mW
Storage Temperature Range .............................-65°C to +150°C
Maximum Junction Temperature .....................................+150°C
ESD Protection
Human Body Model
All Pins to GND ............................................................±2kV
OUT_ ............................................................................±2kV
IEC 61000-4-2 Level 4
Contact Discharge (OUT_)...............................................±8kV
Air Discharge (OUT_) .....................................................±15kV
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%, IN_ = high or low, EN = high,
EN
= low, 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 OUTPUTS (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
Unterminated Output High
Voltage
Unterminated Output Low
Voltage
Differential Output Short-Circuit
Current Magnitude
Output Short-Circuit Current
Output High-Impedance Current
Power-Off Output Current
INPUTS (IN_, EN,
EN)
High-Level Input Voltage
Low-Level Input Voltage
V
IH
V
IL
2.0
-1.0
V
CC
+ 1
+0.8
V
V
V
OD
∆V
OD
V
OS
∆V
OS
V
OH
V
OL
V
OHUT
V
OLUT
I
OSD
I
OS
I
OZ
I
OFF
Figure 1
Figure 1
Figure 1
Figure 1
Figure 1
Figure 1
Output open, Figure 6
Output open, Figure 6
V
OD
= 0 (Note 3)
OUT_+ = 0 at IN_ = high,
or OUT_- = 0 at IN_ = low
EN = low and
EN
= high,
OUT_ = 0 or V
CC
, no load
V
CC
, IN_, EN,
EN
= 0 or open, OUT_ = 0 or
3.6V, no load
-0.5
-0.5
±0.002
±0.001
0.90
1.9
0.1
9
-9
+0.5
+0.5
1.125
250
368
0.3
1.28
0.3
450
25
1.375
25
1.6
mV
mV
V
mV
V
V
V
V
mA
mA
µA
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
Quad LVDS Line Driver with High-ESD
Tolerance and Flow-Through Pinout
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, R
L
= 100Ω ±1%, IN_ = high or low, EN = high,
EN
= low, 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
Input Current
SUPPLY CURRENT
I
CC
Supply Current
I
CCL
I
CCZ
IN_ = V
CC
or 0, EN = V
CC
,
EN
= 0, no load
IN_ = V
CC
or 0, EN = V
CC
,
EN
= 0,
outputs loaded
IN_ = V
CC
or 0, EN = 0,
EN
= V
CC
3.8
18
3.8
6.0
25
6
mA
SYMBOL
I
IN
CONDITIONS
0
≤
IN_, EN,
EN
≤
V
CC
V
CC
≤
IN_, EN,
EN
≤
V
CC
+ 1
-1V
≤
IN_, EN,
EN
≤
0
-1.5
MIN
-20
TYP
5
0.67
-0.46
MAX
+20
1.5
UNITS
µA
mA
MAX9178
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 4–7)
PARAMETER
Differential Propagation Delay
High to Low
Differential Propagation Delay
Low to High
Differential Pulse Skew
Differential Channel-to-Channel
Skew
Differential Part-to-Part Skew
Rise Time
Fall Time
Disable Time High to Z
Disable Time Low to Z
Enable Time Z to High
Enable Time Z to Low
Active to High Time
High to Active Time
Maximum Operating Frequency
SYMBOL
t
PHLD
t
PLHD
t
SKD1
t
SKD2
t
SKD3
t
SKD4
t
R
t
F
t
PHZ
t
PLZ
t
PZH
t
PZL
t
AH
t
HA
f
MAX
Figures 2, 3
Figures 2, 3
Figures 2, 3 (Note 8)
Figures 2, 3 (Note 9)
Figures 2, 3 (Note 10)
Figures 2, 3 (Note 11)
Figures 2, 3
Figures 2, 3
Figures 4, 5
Figures 4, 5
Figures 4, 5
Figures 4, 5
R
L
= 80Ω to 132Ω
±1%;
Figures 6, 7
R
L
= 80Ω to 132Ω
±1%;
Figures 6, 7 (Note 12)
(Note 13)
200
0.20
0.20
0.43
0.41
3.9
3.9
5.0
5.0
50
1.0
CONDITIONS
MIN
0.9
0.9
TYP
1.4
1.5
0.1
0.15
MAX
2.0
2.0
0.25
0.35
0.9
1.1
0.70
0.70
5
5
7
7
100
1.5
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
MHz
Note 1:
Maximum and minimum limits over temperature are guaranteed by design and characterization. Devices are 100% tested
at T
A
= +85°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
,
∆V
OD
, V
OS
, and
∆V
OS
.
Note 3:
Guaranteed by design.
Note 4:
AC parameters are guaranteed by design and characterization. Limits are set at ±6 sigma.
Note 5:
C
L
includes probe and jig capacitance.
Note 6:
Pulse generator output for AC tests: t
R
= t
F
= 1ns (0.2 x V
CC
to 0.8 x V
CC
), 50% duty cycle, R
O
= 50Ω, V
OH
= V
CC
+ 1V set-
tling to V
CC
, V
OL
= -1V settling to zero, frequency = 200MHz.
_______________________________________________________________________________________
3
Quad LVDS Line Driver with High-ESD
Tolerance and Flow-Through Pinout
MAX9178
SWITCHING CHARACTERISTICS (continued)
(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 4–7)
Note 7:
Pulse generator output for t
PHZ
, t
PLZ
, t
PZH
, t
PZL
, t
AH
, and t
HA
tests: t
R
= t
F
= 1ns (0.2 x V
CC
to 0.8 x V
CC
), 50% duty cycle,
R
O
= 50Ω, V
OH
= V
CC
+ 1V settling to V
CC
, V
OL
= -1V settling to zero, frequency = 100kHz.
Note 8:
t
SKD1
is the magnitude of the difference of differential propagation delay. t
SKD1
= |t
PHLD
- t
PLHD
|.
Note 9:
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 10:
t
SKD3
is the magnitude of the difference of any differential propagation delays between devices at the same V
CC
and within
5°C of each other.
Note 11:
t
SKD4
is the magnitude of the difference of any differential propagation delays between devices operating over the rated
supply and temperature ranges.
Note 12:
After t
HA
time, all switching characteristics specifications are met.
Note 13:
Meets all AC parameters at f
MAX
= 200MHz with |V
OD
|
≥
250mV.
Typical Operating Characteristics
(V
CC
= +3.3V, R
L
= 100Ω, C
L
= 15pF, T
A
= +25°C, unless otherwise noted.)
OUTPUT SHORT-CIRCUIT CURRENT
vs. SUPPLY VOLTAGE
MAX9178 toc01
OUTPUT SHORT-CIRCUIT CURRENT
vs. SUPPLY VOLTAGE
OUTPUT SHORT-CIRCUIT CURRENT (mA)
V
IN
= V
CC
OR GND
-3.4
MAX9178 toc02
5.0
OUTPUT SHORT-CIRCUIT CURRENT (mA)
V
IN
= V
CC
OR GND
4.6
-3.0
4.2
-3.8
3.8
OUT_ TO GND
-4.2
OUT_ TO V
CC
-4.6
3.4
3.0
3.0
3.1
3.2
3.3
3.4
3.5
3.6
SUPPLY VOLTAGE (V)
-5.0
3.0
3.1
3.2
3.3
3.4
3.5
3.6
SUPPLY VOLTAGE (V)
OUTPUT HIGH-IMPEDANCE STATE CURRENT
vs. SUPPLY VOLTAGE
MAX9178 toc03
DIFFERENTIAL OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
DIFFERENTIAL OUTPUT VOLTAGE (mV)
368
366
364
362
360
358
356
354
352
MAX9178 toc04
90
OUTPUT HIGH-IMPEDANCE CURRENT (pA)
OUT_ TO GND
60
370
30
0
-30
OUT_ TO V
CC
-60
3.0
3.1
3.2
3.3
3.4
3.5
3.6
SUPPLY VOLTAGE (V)
350
3.0
3.1
3.2
3.3
3.4
3.5
3.6
SUPPLY VOLTAGE (V)
4
_______________________________________________________________________________________
Quad LVDS Line Driver with High-ESD
Tolerance and Flow-Through Pinout
Typical Operating Characteristics (continued)
(V
CC
= +3.3V, R
L
= 100Ω, C
L
= 15pF, T
A
= +25°C, unless otherwise noted.)
MAX9178
DIFFERENTIAL OUTPUT VOLTAGE
vs. LOAD RESISTOR
MAX9178 toc05
OFFSET VOLTAGE
vs. SUPPLY VOLTAGE
1.278
1.276
OFFSET VOLTAGE (V)
1.274
1.272
1.270
1.268
1.266
1.264
1.262
MAX9178 toc06
SUPPLY CURRENT
vs. FREQUENCY
MAX9178 toc07
600
DIFFERENTIAL OUTPUT VOLTAGE (mV)
500
400
300
200
100
0
1.280
27
SUPPLY CURRENT (mA)
24
21
ALL-CHANNELS SWITCHING
18
ONE-CHANNEL SWITCHING
15
0.01
1.260
50 60 70 80 90 100 110 120 130 140 150
LOAD RESISTOR (Ω)
3.0
3.1
3.2
3.3
3.4
3.5
3.6
SUPPLY VOLTAGE (V)
0.1
1
10
100
1000
FREQUENCY (MHz)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9178 toc08
SUPPLY CURRENT
vs. AMBIENT TEMPERATURE
DIFFERENTIAL PROPAGATION DELAY (ns)
FREQUENCY = 200MHz
26
SUPPLY CURRENT (mA)
ALL-CHANNELS SWITCHING
MAX9178 toc09
DIFFERENTIAL PROPAGATION DELAY
vs. SUPPLY VOLTAGE
FREQUENCY = 200MHz
1.50
1.45
1.40
1.35
1.30
1.25
t
PHLD
t
PLHD
MAX9178 toc10
30
FREQUENCY = 200MHz
28
SUPPLY CURRENT (mA)
26
ALL-CHANNELS SWITCHING
24
22
20
ONE-CHANNEL SWITCHING
18
16
3.0
3.1
3.2
3.3
3.4
3.5
28
1.55
24
22
20
ONE-CHANNEL SWITCHING
18
3.6
-40
-15
10
35
60
85
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
3.0
3.1
3.2
3.3
3.4
3.5
3.6
SUPPLY VOLTAGE (V)
DIFFERENTIAL PROPAGATION DELAY
vs. AMBIENT TEMPERATURE
MAX9178 toc11
DIFFERENTIAL SKEW
vs. SUPPLY VOLTAGE
MAX9178 toc12
DIFFERENTIAL SKEW
vs. AMBIENT TEMPERATURE
180
160
DIFFERENTIAL SKEW (ps)
140
120
100
80
60
40
20
0
FREQUENCY = 200MHz
MAX9178 toc13
2.0
DIFFERENTIAL PROPAGATION DELAY (ns)
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
-40
-15
10
35
60
t
PLHD
t
PHLD
FREQUENCY = 200MHz
200
180
160
DIFFERENTIAL SKEW (ps)
140
120
100
80
60
40
20
0
FREQUENCY = 200MHz
200
85
3.0
3.1
3.2
3.3
3.4
3.5
3.6
-40
-15
10
35
60
85
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
_______________________________________________________________________________________
5
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