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Электронный компонент: MAX9236

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MAX9234 DS
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General Description
The MAX9234/MAX9236/MAX9238 deserialize three
LVDS serial-data inputs into 21 single-ended
LVCMOS/LVTTL outputs. A parallel-rate LVDS clock
received with the LVDS data streams provides timing for
deserialization. The outputs have a separate supply,
allowing 1.8V to 5V output logic levels. All these devices
are hot-swappable and allow "on-the-fly" frequency
programming.
The MAX9234/MAX9236/MAX9238 feature DC balance,
which allows isolation between a serializer and deseri-
alizer using AC-coupling. Each deserializer decodes
data transmitted by one of the MAX9209/MAX9211/
MAX9213/MAX9215 serializers.
The MAX9234 has a rising-edge output strobe. The
MAX9236/MAX9238 have a falling-edge output strobe.
The MAX9234/MAX9236/MAX9238 operate in DC-
balanced mode only.
The MAX9234/MAX9236 operate with a parallel input
clock of 8MHz to 34MHz, while the MAX9238 operates
from 16MHz to 66MHz. The transition time of the single-
ended outputs is increased on the low-frequency version
parts (MAX9234/MAX9236) for reduced EMI. The LVDS
inputs meet ISO 10605 ESD specification, 25kV for Air
Discharge and 8kV Contact Discharge.
The MAX9234/MAX9236/MAX9238 are available in 48-pin
TSSOP packages and operate over the -40C to +85C
temperature range.
Applications
Automotive Navigation Systems
Automotive DVD Entertainment Systems
Digital Copiers
Laser Printers
Features
DC Balance Allows AC-Coupling for Wider-Input
Common-Mode Voltage Range
On-the-Fly Frequency Programming
 Operating Frequency Range
8MHz to 34MHz (MAX9234/MAX9236)
16MHz to 66MHz (MAX9238)
Falling-Edge Output Strobe (MAX9236/MAX9238)
 Slower Output Transitions for Reduced EMI
(MAX9234/MAX9236)
High-Impedance Outputs when PWRDWN Is Low
Allow Output Busing
5V-Tolerant PWRDWN Input
 PLL Requires No External Components
 Up to 1.386Gbps Throughput
 Separate Output Supply Pins Allow Interface to
1.8V, 2.5V, 3.3V, and 5V Logic
LVDS Inputs Meet ISO 10605 ESD Requirements
 LVDS Inputs Conform to ANSI TIA/EIA-644 LVDS
Standard
Low-Profile, 48-Lead TSSOP Package
 +3.3V Main Power Supply
 -40C to +85C Operating Temperature Range
MAX9234/MAX9236/MAX9238
Hot-Swappable, 21-Bit, DC-Balanced LVDS
Deserializers
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-3641; Rev 0; 4/05
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.
Functional Diagram and Pin Configuration appear at end of
data sheet.
PART
TEMP RANGE
PIN-PACKAGE
MAX9234EUM
-40C to +85C
48 TSSOP
MAX9236EUM
-40C to +85C
48 TSSOP
MAX9238EUM
-40C to +85C
48 TSSOP
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MAX9234/MAX9236/MAX9238
Hot-Swappable, 21-Bit, DC-Balanced LVDS
Deserializers
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, V
CCO
= +3.0V to +5.5V, PWRDWN = high, differential input voltage
V
ID
= 0.05V to 1.2V, input common-
mode voltage V
CM
=
V
ID
/2
to 2.4V - V
ID
/2
, T
A
= -40C to +85C, unless otherwise noted. Typical values are at V
CC
= V
CCO
=
+3.3V,
V
ID
= 0.2V, V
CM
= 1.25V, T
A
= +25C.) (Notes 1, 2)
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.
V
CC
to GND ...........................................................-0.5V to +4.0V
V
CCO
to GND.........................................................-0.5V to +6.0V
RxIN_, RxCLK IN_ to GND ....................................-0.5V to +4.0V
PWRDWN to GND....................................................-0.5V to 6.0V
RxOUT_, RxCLK OUT to GND ................-0.5V to (VCCO + 0.5V)
Continuous Power Dissipation (TA = +70C)
48-Pin TSSOP (derate 16mW/C above +70C) ....... 1282mW
Storage Temperature Range .............................-65C to +150C
Junction Temperature ......................................................+150C
ESD Protection
Human Body Model (RD = 1.5k
, CS = 100pF)
All Pins to GND ........................................................5kV
ISO 10605 (RD = 2k
, CS = 330pF)
Contact Discharge (RxIN_, RxCLK IN_) to GND ........8kV
Air Discharge (RxIN_, RxCLK IN_) to GND ...............25kV
Lead Temperature (soldering, 10s) .................................+300C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SINGLE-ENDED INPUT (PWRDWN)
High-Level Input Voltage
V
IH
2.0
5.5
V
Low-Level Input Voltage
V
IL
-0.3
+0.8
V
Input Current
I
IN
V
IN
= high or low
-70
+70
A
Input Clamp Voltage
V
CL
I
CL
= -18mA
-1.5
V
SINGLE-ENDED OUTPUTS (RxOUT_, RxCLK OUT)
I
OH
= -100A
V
CCO
-
0.1
RxCLK OUT
V
CCO
-
0.25
MAX9234/
MAX9236
RxOUT_
V
CCO
-
0.40
High-Level Output Voltage
V
OH
I
OH
= -2mA
MAX9238
V
CCO
-
0.25
V
I
OL
= 100A
0.1
RxCLK OUT
0.2
MAX9234/
MAX9236
RxOUT_
0.26
Low-Level Output Voltage
V
OL
I
OL
= 2mA
MAX9238
0.2
V
High-Impedance Output Current
I
OZ
PWRDWN = low,
V
OUT_
= -0.3V to V
CCO
+ 0.3V
-20
+20
A
RxCLK OUT
-10
-40
MAX9234/
MAX9236
RxOUT_
-5
-20
V
CCO
= 3.0V to
3.6V, V
OUT
= 0
MAX9238
-10
-40
RxCLK OUT
-28
-75
MAX9234/
MAX9236
RxOUT_
-14
-37
Output Short-Circuit Current
(Note: Short one output at a
time.)
I
OS
V
CCO
= 4.5V to
5.5V, V
OUT
= 0
MAX9238
-28
-75
mA
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MAX9234/MAX9236/MAX9238
Hot-Swappable, 21-Bit, DC-Balanced LVDS
Deserializers
_______________________________________________________________________________________
3
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, V
CCO
= +3.0V to +5.5V, PWRDWN = high, differential input voltage
V
ID
= 0.05V to 1.2V, input common-
mode voltage V
CM
=
V
ID
/2
to 2.4V - V
ID
/2
, T
A
= -40C to +85C, unless otherwise noted. Typical values are at V
CC
= V
CCO
=
+3.3V,
V
ID
= 0.2V, V
CM
= 1.25V, T
A
= +25C.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LVDS INPUTS
Differential Input-High Threshold
V
TH
50
mV
Differential Input-Low Threshold
V
TL
-50
mV
Input Current
I
IN+,
I
IN-
PWRDWN = high or low
-25
+25
A
Power-Off Input Current
I
INO+,
I
INO-
V
CC
= V
CCO
= 0 or open,
PWRDWN = 0 or open
-40
+40
A
PWRDWN = high or low (Figure 1)
Input Resistor 1
R
IN1
V
CC
= V
CCO
= 0 or open (Figure 1)
42
78
k
POWER SUPPLY
8MHz
42
16MHz
57
MAX9234/
MAX9236
34MHz
98
16MHz
63
34MHz
106
Worst-Case Supply Current
I
CCW
C
L
= 8pF,
worst-case
pattern; V
CC
=
V
CCO
= 3.0V to
3.6V, Figure 2
MAX9238
66MHz
177
mA
Power-Down Supply Current
I
CCZ
PWRDWN = low
50
A
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MAX9234/MAX9236/MAX9238
Hot-Swappable, 21-Bit, DC-Balanced LVDS
Deserializers
4
_______________________________________________________________________________________
Note 1: 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
and V
TL
.
Note 2: Maximum and minimum limits overtemperature are guaranteed by design and characterization. Devices are production
tested at T
A
= +25C.
Note 3: AC parameters are guaranteed by design and characterization, and are not production tested. Limits are set at 6 sigma.
Note 4: C
L
includes probe and test jig capacitance.
Note 5: RCIP is the period of RxCLK IN. RCOP is the period of RxCLK OUT. RCIP = RCOP.
Note 6: RSKM measured with
150ps cycle-to-cycle jitter on RxCLK IN.
AC ELECTRICAL CHARACTERISTICS
(V
CC
= V
CCO
= +3.0V to +3.6V, 100mV
P-P
at 200kHz supply noise, C
L
= 8pF, PWRDWN = high, differential input voltage
V
ID
=
0.1V to 1.2V, input common mode voltage V
CM
=
V
ID
/2
to 2.4V - V
ID
/2
, T
A
= -40C to +85C, unless otherwise noted. Typical
values are at V
CC
= V
CCO
= +3.3V,
V
ID
= 0.2V, V
CM
= 1.25V, T
A
= +25C.) (Notes 3, 4, 5)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
RxOUT
3.52
5.04
6.24
MAX9234/
MAX9236
RxCLK OUT
2.2
3.15
3.9
Output Rise Time
CLHT
0.1V
CCO
to
0.9V
CCO
,
Figure 3
MAX9238
2.2
3.15
3.9
ns
RxOUT
1.95
3.18
4.35
MAX9234/
MAX9236
RxCLK OUT
1.3
2.12
2.9
Output Fall Time
CHLT
0.9V
CCO
to
0.1V
CCO
,
Figure 3
MAX9238
1.3
2.12
2.9
ns
8MHz
6600
7044
16MHz
2560
3137
34MHz
900
1327
RxIN Skew Margin
RSKM
Figure 4
(Note 6)
MAX9238
66MHz
330
685
ps
RxCLK OUT High Time
RCOH
Figures 5a, 5b
0.35 x
RCOP
ns
RxCLK OUT Low Time
RCOL
Figures 5a, 5b
0.35 x
RCOP
ns
RxOUT Setup to RxCLK OUT
RSRC
Figures 5a, 5b
0.30 x
RCOP
ns
RxOUT Hold from RxCLK OUT
RHRC
Figures 5a, 5b
0.45 x
RCOP
ns
RxCLK IN to RxCLK OUT Delay
RCCD
Figures 6a, 6b
4.9
6.17
8.1
ns
Deserializer Phase-Locked Loop
Set
RPLLS
Figure 7
32800
x RCIP
ns
Deserializer Power-Down Delay
RPDD
Figure 8
100
ns
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MAX9234/MAX9236/MAX9238
Hot-Swappable, 21-Bit, DC-Balanced LVDS
Deserializers
_______________________________________________________________________________________
5
MAX9234/MAX9236
WORST-CASE PATTERN AND PRBS
SUPPLY CURRENT vs. FREQUENCY
MAX9234/6/8 toc01
FREQUENCY (MHz)
SUPPLY CURRENT (mA)
30
25
20
15
10
40
30
50
60
70
80
90
100
5
40
35
WORST CASE
2
7
-1 PRBS
MAX9238
WORST-CASE PATTERN AND PRBS
SUPPLY CURRENT vs. FREQUENCY
MAX9234/6/8 toc02
FREQUENCY (MHz)
SUPPLY CURRENT (mA)
60
50
40
30
20
60
40
80
100
120
140
160
180
10
70
WORST CASE
2
7
-1 PRBS
MAX9234/MAX9236
RxOUT TRANSITION TIME
vs. OUTPUT SUPPLY VOLTAGE (V
CCO
)
MAX9234/6/8 toc03
OUTPUT SUPPLY VOLTAGE (V)
OUTPUT TRANSITION TIME (ns)
4.5
4.0
3.5
3.0
1
2
3
4
5
6
7
2.5
5.0
CLHT
CHLT
MAX9238
RxOUT TRANSITION TIME
vs. OUTPUT SUPPLY VOLTAGE (V
CCO
)
MAX9234/6/8 toc04
OUTPUT SUPPLY VOLTAGE (V)
OUTPUT TRANSITION TIME (ns)
4.5
4.0
3.5
3.0
0
1
2
3
4
5
2.5
5.0
CLHT
CHLT
Typical Operating Characteristics
(V
CC
= V
CCO
= +3.3V, C
L
= 8pF, PWRDWN = high, differential input voltage
V
ID
= 0.2V, input common-mode voltage V
CM
= 1.2V,
T
A
= +25C, unless otherwise noted.)