MAX9238EUM-D Maxim Integrated, MAX9238EUM-D Datasheet

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MAX9238EUM-D

Manufacturer Part Number
MAX9238EUM-D
Description
LVDS Interface IC
Manufacturer
Maxim Integrated
Datasheet
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-
Gap Discharge and ±8kV Contact Discharge.
The MAX9234/MAX9236/MAX9238 are available in 48-pin
TSSOP packages and operate over the -40°C to +85°C
temperature range.
Functional Diagram and Pin Configuration appear at end of
data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
Automotive Navigation Systems
Automotive DVD Entertainment Systems
Digital Copiers
Laser Printers
Hot-Swappable, 21-Bit, DC-Balanced LVDS
General Description
Applications
o DC Balance Allows AC-Coupling for Wider Input
o On-the-Fly Frequency Programming
o Operating Frequency Range
o Falling-Edge Output Strobe (MAX9236/MAX9238)
o Slower Output Transitions for Reduced EMI
o High-Impedance Outputs when PWRDWN Is Low
o 5V-Tolerant PWRDWN Input
o PLL Requires No External Components
o Up to 1.386Gbps Throughput
o Separate Output Supply Pins Allow Interface to
o LVDS Inputs Meet ISO 10605 ESD Requirements
o LVDS Inputs Conform to ANSI TIA/EIA-644 LVDS
o Low-Profile, 48-Lead TSSOP Package
o +3.3V Main Power Supply
o -40°C to +85°C Operating Temperature Range
+ Denotes a lead(Pb)-free/RoHS-compliant package.
/V Denotes an automotive qualified part.
Note: Devices are also available in a tape-and-reel packaging.
Specify tape and reel by adding “T” to the part number when
ordering.
MAX9234EUM+
MAX9234EUM/V+
MAX9236EUM+
MAX9238EUM+
Common-Mode Voltage Range
(MAX9234/MAX9236)
Allow Output Busing
1.8V, 2.5V, 3.3V, and 5V Logic
Standard
8MHz to 34MHz (MAX9234/MAX9236)
16MHz to 66MHz (MAX9238)
MAX9234/MAX9236/
PART
Ordering Information
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Deserializers
MAX9238
19-3641; Rev 2; 9/12
Features
PIN-
PACKAGE
48 TSSOP
48 TSSOP
48 TSSOP
48 TSSOP

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MAX9238EUM-D Summary of contents

Page 1

... MAX9234EUM/V+ -40°C to +85°C MAX9236EUM+ -40°C to +85°C MAX9238EUM+ -40°C to +85°C + Denotes a lead(Pb)-free/RoHS-compliant package. /V Denotes an automotive qualified part. Note: Devices are also available in a tape-and-reel packaging. Specify tape and reel by adding “T” to the part number when ordering ...

Page 2

... Air Discharge (RxIN_, RxCLK IN_) to GND ...............±25kV ⏐ = 0.05V to 1.2V, input common- ID MIN TYP 2.0 -0.3 - CCO 0 CCO RxCLK OUT 0. CCO RxOUT_ 0. CCO 0.25 RxCLK OUT RxOUT_ -20 RxCLK OUT -10 RxOUT_ -5 -10 RxCLK OUT -28 RxOUT_ -14 - CCO MAX UNITS 5.5 V +0.8 V +70 µA -1 0.1 0.2 V 0.26 0.2 +20 µA -40 -20 -40 mA -75 -37 -75 Maxim Integrated ...

Page 3

... Differential Input-High Threshold Differential Input-Low Threshold Input Current Power-Off Input Current I INO+, Input Resistor 1 POWER SUPPLY Worst-Case Supply Current Power-Down Supply Current Maxim Integrated MAX9234/MAX9236/MAX9238 /2⏐ -40°C to +85°C, unless otherwise noted. Typical values are +25°C.) (Notes 1, 2) CONDITIONS V TH ...

Page 4

... Typical A MIN TYP MAX RxOUT 3.52 5.04 6.24 RxCLK OUT 2.2 3.15 2.2 3.15 RxOUT 1.95 3.18 4.35 RxCLK OUT 1.3 2.12 1.3 2.12 8MHz 6600 7044 16MHz 2560 3137 34MHz 900 1327 66MHz 330 685 0.35 x RCOP 0.35 x RCOP 0.30 x RCOP 0.45 x RCOP 4.9 6.17 32800 x RCIP 100 ⏐ UNITS ns 3.9 3.9 2 Maxim Integrated ...

Page 5

... FREQUENCY (MHz) MAX9234/MAX9236 RxOUT TRANSITION TIME vs. OUTPUT SUPPLY VOLTAGE ( 2.5 3.0 3.5 OUTPUT SUPPLY VOLTAGE (V) Maxim Integrated MAX9234/MAX9236/MAX9238 Typical Operating Characteristics PRBS CCO CLHT CHLT 4.0 4.5 5.0 Deserializers ⏐ = 0.2V, input common-mode voltage V ID MAX9238 WORST-CASE PATTERN AND PRBS SUPPLY CURRENT vs ...

Page 6

... V as possible, with the smallest value capacitor closest to the supply pin. CCO Digital Supply Voltage. Bypass to GND with 0.1µF and 0.001µF capacitors in parallel as close possible, with the smallest value capacitor closest to the supply pin. CC Pin Description FUNCTION Maxim Integrated ...

Page 7

... An LVDS receiver accepts signals from 0 to 2.4V, allowing approximately ±1V common-mode differ- ence between the driver and receiver on a DC-coupled Maxim Integrated MAX9234/MAX9236/MAX9238 FREQUENCY (MHz) MAX9210 MAX9220 MAX9222 link (2 ...

Page 8

... RSKM IDEAL Figure 6a. MAX9234 Clock-IN to Clock-OUT Delay RxCLK IN 2.0V 2.0V RCOH Figure 6b. MAX9236/MAX9238 Clock-IN to Clock-OUT Delay RHRC 2.0V 0.8V PWRDWN 0.8V 0.8V RCOL RHRC 2.0V RxCLK OUT 0.8V Figure 7. Phase-Locked Loop Set Time 90% CHLT RCCD 1.5V RxCLK OUT + RCCD 1.5V RxCLK OUT RPLLS RxCLK IN HIGH-Z 10% Maxim Integrated ...

Page 9

... TxIN4 DCB0 RxIN0 TxIN_, DCA_, AND DCB_ ARE DATA FROM THE SERIALIZER. Figure 9. Deserializer Serial Input Maxim Integrated MAX9234/MAX9236/MAX9238 Voltage droop and the DSV of transmitted symbols cause signal transitions to start from different voltage levels. Because the transition time is finite, starting the signal transition from different voltage levels causes timing jitter ...

Page 10

... TxCLK OUT RxCLK IN 21:3 SERIALIZER MAX9234 MAX9236 MAX9238 RxIN 100Ω 1:( 100Ω 1:( 100Ω 1:( 100Ω PLL RxCLK IN 3:21 DESERIALIZER MAX9234 MAX9236 MAX9238 RxIN 7 1:( 1:( RxOUT 7 1:( PWRDWN PLL RxCLK OUT 3:21 DESERIALIZER 7 7 RxOUT 7 PWRDWN RxCLK OUT Maxim Integrated ...

Page 11

... To prevent switching due to noise when the clock input is not driven, bias the clock input to differential +15mV by connecting a 10kΩ ±1% Maxim Integrated MAX9234/MAX9236/MAX9238 pullup resistor between the noninverting input and V and a 10kΩ ±1% pulldown resistor between the invert- ing input and ground. These bias resistors, along with the 100Ω ...

Page 12

... CHARGE-CURRENT- DISCHARGE LIMIT RESISTOR RESISTANCE HIGH- C STORAGE VOLTAGE S 150pF CAPACITOR DC SOURCE < 3.6V) the DC Electrical CCO = 5.5V 34MHz, and C CCO 5.5V - 3. 6pF + 8pF = 14pF T INT L DEVICE UNDER TEST DEVICE UNDER TEST DEVICE UNDER TEST > 3.6V) CCO = 6pF. The INT = 8pF: L Maxim Integrated ...

Page 13

... RxIN0+ RxIN0- RxIN1+ RxIN1- RxIN2+ RxIN2- RxCLK IN+ RxCLK IN- PWRDWN Maxim Integrated MAX9234/MAX9236/MAX9238 the package power-dissipation rating. Do not exceed the maximum package power-dissipation rating. See (clock the Absolute Maximum Ratings for maximum package power-dissipation capacity and temperature derating ...

Page 14

... RoHS status RxOUT12 PACKAGE 40 RxOUT11 TYPE 39 RxOUT10 48 TSSOP 38 GND 37 RxOUT9 36 V CCO 35 RxOUT8 34 RxOUT7 33 RxOUT6 32 GND 31 RxOUT5 30 RxOUT4 29 RxOUT3 28 V CCO 27 RxOUT2 26 RxOUT1 25 GND Chip Information Package Information LAND PACKAGE OUTLINE NO. PATTERN NO. CODE 90-0124 U48+1 21-0155 Maxim Integrated ...

Page 15

... Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed ...

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