MAX9248ECM/V+T Maxim Integrated Products, MAX9248ECM/V+T Datasheet

IC DESERIALIZER LVDS 48-LQFP

MAX9248ECM/V+T

Manufacturer Part Number
MAX9248ECM/V+T
Description
IC DESERIALIZER LVDS 48-LQFP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX9248ECM/V+T

Function
Deserializer
Data Rate
840Mbps
Input Type
LVDS
Output Type
LVTTL, LVCMOS
Number Of Inputs
1
Number Of Outputs
18
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
48-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX9248/MAX9250 digital video serial-to-parallel
converters deserialize a total of 27 bits during data and
control phases. In the data phase, the LVDS serial input is
converted to 18 bits of parallel video data and in the con-
trol phase, the input is converted to 9 bits of parallel con-
trol data. The separate video and control phases take
advantage of video timing to reduce the serial-data rate.
The MAX9248/MAX9250 pair with the MAX9247 serializer
to form a complete digital video transmission system. For
operating frequencies less than 35MHz, the MAX9248/
MAX9250 can also pair with the MAX9217 serializer.
The MAX9248 features spread-spectrum capability,
allowing output data and clock to spread over a speci-
fied frequency range to reduce EMI. The data and
clock outputs are programmable for a spectrum spread
of ±4% or ±2%. The MAX9250 features output enable
input control to allow data busing.
Proprietary data decoding reduces EMI and provides
DC balance. The DC balance allows AC-coupling, pro-
viding isolation between the transmitting and receiving
ends of the interface. The MAX9248/MAX9250 feature a
selectable rising or falling output latch edge.
ESD tolerance is specified for ISO 10605 with ±10kV
Contact Discharge and ±30kV Air-Gap Discharge.
The MAX9248/MAX9250 operate from a +3.3V ±10%
core supply and feature a separate output supply for
interfacing to 1.8V to 3.3V logic-level inputs. These
devices are available in a 48-lead LQFP package and
are specified from -40°C to +85°C or -40°C to +105°C.
19-3943; Rev 3; 4/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Navigation System Displays
In-Vehicle Entertainment Systems
Video Cameras
LCD Displays
________________________________________________________________ Maxim Integrated Products
General Description
Applications
DC-Balanced LVDS Deserializers
27-Bit, 2.5MHz to 42MHz
♦ Programmable ±4% or ±2% Spread-Spectrum
♦ Proprietary Data Decoding for DC Balance and
♦ Control Data Deserialized During Video Blanking
♦ Five Control Data Inputs are Single-Bit-Error
♦ Output Transition Time is Scaled to Operating
♦ Staggered Output Switching Reduces EMI
♦ Output Enable Allows Busing of Outputs
♦ Clock Pulse Stretch on Lock
♦ Wide ±2% Reference Clock Tolerance
♦ Synchronizes to MAX9247 Serializer Without
♦ ISO 10605 and IEC 61000-4-2 Level 4
♦ Separate Output Supply Allows Interface to 1.8V
♦ +3.3V Core Power Supply
♦ Space-Saving LQFP Package
♦ -40°C to +85°C and -40°C to +105°C Operating
+ Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Pin Configuration appears at end of data sheet.
MAX9248ECM+
MAX9248ECM/V+
MAX9248GCM+
MAX9248GCM/V+
MAX9250ECM+
MAX9250ECM/V+
MAX9250GCM+
MAX9250GCM/V+
Output for Reduced EMI (MAX9248)
Reduced EMI
Tolerant
Frequency for Reduced EMI
(MAX9250)
External Control
ESD Protection
to 3.3V Logic
Temperature Ranges
PART
-40°C to +105°C
-40°C to +105°C
-40°C to +105°C
-40°C to +105°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
PIN-PACKAGE
48 LQFP
48 LQFP
48 LQFP
48 LQFP
48 LQFP
48 LQFP
48 LQFP
48 LQFP
Features
1

Related parts for MAX9248ECM/V+T

MAX9248ECM/V+T Summary of contents

Page 1

... Navigation System Displays In-Vehicle Entertainment Systems Video Cameras LCD Displays ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 27-Bit, 2.5MHz to 42MHz DC-Balanced LVDS Deserializers ♦ ...

Page 2

DC-Balanced LVDS Deserializers ABSOLUTE MAXIMUM RATINGS V to _GND........................................................-0.5V to +4.0V CC_ Any Ground to Any Ground...................................-0.5V to +0.5V IN+, IN- to LVDSGND............................................-0.5V to +4.0V IN+, IN- Short Circuit to LVDSGND or V CCLVDS (R/F, OUTEN, ...

Page 3

DC ELECTRICAL CHARACTERISTICS (continued) = +3.0V to +3.6V, PWRDWN = high, differential input voltage ⏐V (V CC_ - ⏐ 2⏐ -40°C to +105°C, unless otherwise noted. Typical values are ...

Page 4

DC-Balanced LVDS Deserializers AC ELECTRICAL CHARACTERISTICS = 8pF, PWRDWN = high, differential input voltage ⏐ +3.0V to +3.6V, C CC_ L = ⏐V - ⏐ 2⏐ 2⏐ ...

Page 5

AC ELECTRICAL CHARACTERISTICS (continued) = 8pF, PWRDWN = high, differential input voltage ⏐ +3.0V to +3.6V, C CC_ L = ⏐V - ⏐ 2⏐ 2⏐ -40°C to +105°C, unless otherwise noted. ...

Page 6

DC-Balanced LVDS Deserializers ( +3.3V 8pF +25°C, unless otherwise noted WORST-CASE PATTERN SUPPLY CURRENT vs. FREQUENCY MAX9248 MAX9250 ...

Page 7

PIN NAME MAX9248 MAX9250 RNG1 CCLVDS LVDSGND 7 7 PLLGND CCPLL 9 9 RNG0 10 10 GND ...

Page 8

DC-Balanced LVDS Deserializers PIN NAME MAX9248 MAX9250 LOCK PCLK_OUT RGB_OUT0– 29–36, 29–36, RBG_OUT7, 39–48 39–48 RGB_OUT8– RGB_OUT17 — 14 OUTEN IN IN- REFCLK PLL SSPLL TIMING AND CONTROL RNG[0:1] 8 ...

Page 9

IN 1. IN- Figure 1. LVDS Input Bias 0 CCO DE_OUT LOCK PCLK_OUT 0 CCO RGB_OUT[17: CNTL_OUT[8:0] Figure 3. Output Rise and Fall Times PCLK_OUT PCLK_OUT SHOWN FOR R/F = ...

Page 10

DC-Balanced LVDS Deserializers PWRDWN REFCLK HIGH IMPEDANCE PCLK_OUT RGB_OUT CNTL_OUT HIGH IMPEDANCE DE_OUT HIGH IMPEDANCE LOCK NOTE: R/F = HIGH Figure 7. PLL Lock to REFCLK and Power-Down Delay for MAX9250 0.8V PWRDWN REFCLK HIGH IMPEDANCE ...

Page 11

OUTEN 0. DE_OUT RGB_OUT[17:0] HIGH IMPEDANCE CNTL_OUT[8:0] Figure 9. Output Enable Time FREQUENCY SSM f (MAX) RxCLKOUT f RxCLKIN f (MIN) RxCLKOUT Figure 11. Simplified Modulation Profile ______________________________________________________________________________________ 27-Bit, 2.5MHz to 42MHz DC-Balanced LVDS Deserializers ...

Page 12

DC-Balanced LVDS Deserializers Detailed Description The MAX9248/MAX9250 DC-balanced deserializers operate at a 2.5MHz-to-42MHz parallel clock frequen- cy, deserializing video data to the RGB_OUT[17:0] out- puts when the data-enable output DE_OUT is high, or control data to ...

Page 13

RGB_IN 1 0 CNTL_IN DE_IN PCLK_IN TIMING AND RNG0 PLL CONTROL RNG1 PWRDWN MAX9247 CERAMIC RF SURFACE-MOUNT CAPACITOR Figure 12. AC-Coupled MAX9247 Serializer and MAX9250 Deserializer with Two Capacitors per Link RGB_IN 1 0 CNTL_IN DE_IN PCLK_IN TIMING AND RNG0 ...

Page 14

DC-Balanced LVDS Deserializers RGB_IN 1 0 CNTL_IN DE_IN PCLK_IN TIMING AND RNG0 PLL CONTROL RNG1 PWRDWN MAX9247 CERAMIC RF SURFACE-MOUNT CAPACITOR *CAPACITORS CAN BE AT EITHER END. Figure 14. AC-Coupled MAX9247 Serializer and MAX9248 Deserializer with ...

Page 15

Input Frequency Detection A frequency-detection circuit detects when the LVDS input is not switching. When not switching, all outputs except LOCK are low, LOCK is high, and PCLK_OUT follows REFCLK. This condition occurs, for example, if the serializer is not ...

Page 16

DC-Balanced LVDS Deserializers Spread-Spectrum Selection The MAX9248 single-ended data and clock outputs are programmable for a variation of ±2% or ±4% around the LVDS input clock frequency. The modulation rate of the frequency variation is 32kHz ...

Page 17

CONTROL DATA PCLK_OUT CNTL_OUT DE_OUT RGB_OUT = OUTPUT DATA HELD Figure 18. Output Timing Staggered and Transition Time Adjusted Outputs RGB_OUT[17:0] are grouped into three groups of six, with each group switching about 1ns apart in the video phase to ...

Page 18

DC-Balanced LVDS Deserializers R D 1MΩ 1.5kΩ CHARGE-CURRENT- DISCHARGE LIMIT RESISTOR RESISTANCE HIGH- C STORAGE VOLTAGE S 100pF CAPACITOR DC SOURCE Figure 19. Human Body ESD Test Circuit R D 2kΩ CHARGE-CURRENT- DISCHARGE LIMIT RESISTOR RESISTANCE ...

Page 19

Chip Information PROCESS: CMOS ______________________________________________________________________________________ 27-Bit, 2.5MHz to 42MHz DC-Balanced LVDS Deserializers For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE 48 LQFP Package Information PACKAGE CODE DOCUMENT NO. C48+3 21-0054 19 ...

Page 20

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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