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MAX9122EUE+T

P1-P3P4-P6P7-P9P10-P12
General Description
The MAX9121/MAX9122 quad low-voltage differential sig-
naling (LVDS) differential line receivers are ideal for appli-
cations requiring high data rates, low power, and low
noise. The MAX9121/MAX9122 are guaranteed to receive
data at speeds up to 500Mbps (250MHz) over controlled-
impedance media of approximately 100Ω. The transmis-
sion media may be printed circuit (PC) board traces or
cables.
The MAX9121/MAX9122 accept four LVDS differential
inputs and translate them to LVCMOS outputs. The
MAX9122 features integrated parallel termination resis-
tors (nominally 107Ω), which eliminate the requirement
for four discrete termination resistors and reduce stub
lengths. The MAX9121 inputs are high impedance and
require an external termination resistor when used in a
point-to-point connection.
The devices support a wide common-mode input range of
0.05V to 2.35V, allowing for ground potential differences
and common-mode noise between the driver and the
receiver. A fail-safe feature sets the output high when the
inputs are open, or when the inputs are undriven and
shorted or parallel terminated. The EN and EN inputs con-
trol the high-impedance output. The enables are common
to all four receivers. Inputs conform to the ANSI TIA/EIA-
644 LVDS standard. Flow-through pinout simplifies PC
board layout and reduces crosstalk by separating the
LVDS inputs and LVCMOS outputs. The MAX9121/
MAX9122 operate from a single +3.3V supply, and are
specified for operation from -40°C to +85°C. These
devices are available in 16-pin TSSOP and SO packages.
Refer to the MAX9123 data sheet for a quad LVDS line dri-
ver with flow-through pinout.
Applications
Digital Copiers
Laser Printers
Cellular Phone Base Stations
Add/Drop Muxes
Digital Cross-Connects
DSLAMs
Network Switches/Routers
Backplane Interconnect
Clock Distribution
____________________________Features
♦ Integrated Termination Eliminates Four External
Resistors (MAX9122)
♦ Flow-Through Pinout
Simplifies PC Board Layout
Reduces Crosstalk
♦ Pin Compatible with DS90LV048A
♦ Guaranteed 500Mbps Data Rate
♦ 300ps Pulse Skew (max)
♦ Conform to ANSI TIA/EIA-644 LVDS Standard
♦ Single +3.3V Supply
♦ Fail-Safe Circuit
MAX9121/MAX9122
Quad LVDS Line Receivers with
Integrated Termination and Flow-Through Pinout
________________________________________________________________ Maxim Integrated Products 1
Typical Application Circuit
19-1909; Rev 0; 6/01
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.
EVALUATION KIT
AVAILABLE
Ordering Information
PART TEMP. RANGE PIN-PACKAGE
MAX9121EUE -40°C to +85°C 16 TSSOP
MAX9121ESE -40°C to +85°C 16 SO
MAX9122EUE -40°C to +85°C 16 TSSOP
MAX9122ESE -40°C to +85°C 16 SO
Pin Configuration appears at end of data sheet.
MAX9123
MAX9122
T
X
T
X
T
X
T
X
R
X
R
X
R
X
R
X
107Ω
107Ω
107Ω
107Ω
100Ω SHIELDED TWISTED CABLE OR MICROSTRIP PC BOARD TRACES
LVDS SIGNALS
LVTTL/LVCMOS
DATA OUTPUT
LVTTL/LVCMOS
DATA INPUT
V
CC
to GND...........................................................-0.3V to +4.0V
IN_+, IN_- to GND .................................................-0.3V to +4.0V
EN, EN to GND...........................................-0.3V to (V
CC
+ 0.3V)
OUT_ to GND .............................................-0.3V to (V
CC
+ 0.3V)
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_+, IN_-) ....................................±8kV
MAX9121/MAX9122
Quad LVDS Line Receivers with
Integrated Termination and Flow-Through Pinout
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, differential input voltage |V
ID
| = 0.1V to 1.0V, common-mode voltage V
CM
= |V
ID
/2| to 2.4V - |V
ID
/2|,
T
A
= -40°C to +85°C. Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.) (Note 1)
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.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
LVDS INPUTS (IN_+, IN_-)
Differential Input High Threshold V
TH
100 mV
Differential Input Low Threshold V
TL
-100 mV
0.1V ≤V
ID
≤ 0.6V -20 20 µA
Input Current (MAX9121) I
IN
_+,
I
IN
_-
0.6V <V
ID
≤ 1.0V -25 25 µA
0.1V ≤V
ID
≤ 0.6V, V
CC
= 0 -20 20 µA
Power-Off Input Current
(MAX9121)
I
INOFF
0.6V <V
ID
≤ 1.0V, V
CC
= 0 -25 25 µA
Input Resistor 1 R
IN1
V
CC
= 3.6V or 0, Figure 1 35 kΩ
Input Resistor 2 R
IN2
V
CC
= 3.6V or 0, Figure 1 132 kΩ
Differential Input Resistance
(MAX9122)
R
DIFF
V
CC
= 3.6V or 0, Figure 1 90 107 132 Ω
LVCMOS/LVTTL OUTPUTS (OUT_)
Open, undriven short, or
undriven 100Ω parallel
termination
2.7 3.2
I
OH
= -4.0mA
(MAX9121)
V
ID
= +100mV 2.7 3.2
Open or undriven short 2.7 3.2
Output High Voltage (Table 1) V
OH
I
OH
= -4.0mA
(MAX9122)
V
ID
= +100mV 2.7 3.2
V
Output Low Voltage V
OL
I
OL
= +4.0mA, V
ID
= -100mV 0.1 0.25 V
Output Short-Circuit Current I
OS
Enabled, V
ID
= 0.1V, V
OUT
_ = 0 (Note 2) -15 -120 mA
Output High-Impedance Current I
OZ
Disabled, V
OUT
= 0 or V
CC
-10 +10 µA
MAX9121/MAX9122
Quad LVDS Line Receivers with
Integrated Termination and Flow-Through Pinout
_______________________________________________________________________________________ 3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
LOGIC INPUTS (EN, EN)
Input High Voltage V
IH
2.0 V
CC
V
Input Low Voltage V
IL
0 0.8 V
Input Current I
IN
V
IN_
= V
CC
or 0 -15 15 µA
SUPPLY
Supply Current I
CC
Enabled, inputs open 9 15 mA
Disabled Supply Current I
CCZ
Disabled, inputs open 0.07 0.5 mA
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, C
L
= 15pF, differential input voltage |V
ID
| = 0.2V to 1.0V, common-mode voltage V
CM
= |V
ID
/2| to 2.4V -
|V
ID
/2|, input rise and fall time = 1ns (20% to 80%), input frequency = 100MHz, T
A
= -40°C to +85°C. Typical values are at V
CC
=
+3.3V, V
CM
= 1.2V, |V
ID
| = 0.2V, T
A
= +25°C, unless otherwise noted.) (Notes 3, 4)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Differential Propagation Delay
High to Low
t
PHLD
Figures 2 and 3 1.2 1.93 2.7 ns
Differential Propagation Delay
Low to High
t
PLHD
Figures 2 and 3 1.2 1.79 2.7 ns
Differential Pulse Skew [t
PHLD
-
t
PLHD
] (Note 5)
t
SKD1
Figures 2 and 3 140 300 ps
Differential Channel-to-Channel
Skew (Note 6)
t
SKD2
Figures 2 and 3 400 ps
Differential Part-to-Part Skew
(Note 7)
t
SKD3
Figures 2 and 3 0.8 ns
Differential Part-to-Part Skew
(Note 8)
t
SKD4
Figures 2 and 3 1.5 ns
Rise-Time t
TLH
Figures 2 and 3 0.55 1.0 ns
Fall-Time t
THL
Figures 2 and 3 0.54 1.0 ns
Disable Time High to Z t
PHZ
R
L
= 2kΩ, Figures 4 and 5 14 ns
Disable Time Low to Z t
PLZ
R
L
= 2kΩ, Figures 4 and 5 14 ns
Enable Time Z to High t
PZH
R
L
= 2kΩ, Figures 4 and 5 70 ns
Enable Time Z to Low t
PZL
R
L
= 2kΩ, Figures 4 and 5 70 ns
Maximum Operating Frequency
(Note 9)
f
MAX
All channels switching 250 300 MHz
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, differential input voltage |V
ID
| = 0.1V to 1.0V, common-mode voltage V
CM
= |V
ID
/2| to 2.4V - |V
ID
/2|,
T
A
= -40°C to +85°C. Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.) (Note 1)
P1-P3P4-P6P7-P9P10-P12

MAX9122EUE+T

Mfr. #:
Buy MAX9122EUE+T
Manufacturer:
Maxim Integrated
Description:
LVDS Interface IC Quad LVDS Line Receiver
Lifecycle:
New from this manufacturer.
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