MAX9250 Maxim, MAX9250 Datasheet

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MAX9250

Manufacturer Part Number
MAX9250
Description
The MAX9248/MAX9250 digital video serial-to-parallel converters deserialize a total of 27 bits during data and control phases
Manufacturer
Maxim
Datasheet

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MAX9250ECM+
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Maxim Integrated
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MAX9250ECM+
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MAX9250ECM+T
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MAX9250ECM/V+
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MAX9250ECM/V+T
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Part Number:
MAX9250GCM+
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Maxim Integrated
Quantity:
10 000
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 MAX9250

MAX9250 Summary of contents

Page 1

... 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 ...

Page 2

... LQFP (derate 21.7mW/°C above +70°C).....1739mW 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 ...

Page 3

... open, PWRDWN = 0 or open, MAX9248/MAX9250GCM Figure open, CC_ I INO- PWRDWN = 0 or open (Note 3) RNG1 = low RNG0 = low MAX9250 RNG1 = low C = 8pF, L RNG0 = high worst-case RNG1 = high pattern, RNG0 = low Figure 2 RNG1 = high RNG0 = high RNG1 = low RNG0 = low ...

Page 4

... MAX9250ECM RNG1 = low MAX9248/ MAX9250GCM t Figure 4 HIGH t Figure 4 LOW t Figure 5 DVB t Figure 5 DVA MAX9248, Figure 8 PLLREF MAX9250, Figure 7 Maximum output frequency SS = high, Figure 11 Minimum output frequency Maximum output frequency SS = low, Figure 11 Minimum output frequency ⏐ = 0.1V to 1.2V, input common-mode voltage ID = +3.3V, ⏐V CC_ ID MIN ...

Page 5

... L _______________________________________________________________________________________ 27-Bit, 2.5MHz to 42MHz DC-Balanced LVDS Deserializers CONDITIONS f Figure 11 SSM t Figures 7, 8 PDD MAX9248, Figure 17 ΔSSPLL t MAX9250, Figure MAX9250, Figure 0.3V. PWRDWN is ≤ 0.3V, REFCLK is static. CC ⏐ = 0.1V to 1.2V, input common-mode voltage ID = +3.3V, ⏐V CC_ ID MIN TYP MAX f / REFCLK 1024 100 32,800 ...

Page 6

... DC-Balanced LVDS Deserializers ( +3.3V 8pF +25°C, unless otherwise noted WORST-CASE PATTERN SUPPLY CURRENT vs. FREQUENCY MAX9248 MAX9250 FREQUENCY (MHz) OUTPUT POWER SPECTRUM vs. FREQUENCY (REFCLK = 42MHz, NO SPREAD, 4%, AND 2% SPREAD) 0 RESOLUTION BW = 30kHz ...

Page 7

... PIN NAME MAX9248 MAX9250 RNG1 CCLVDS LVDSGND 7 7 PLLGND CCPLL 9 9 RNG0 10 10 GND REFCLK PWRDWN — SS CNTL_OUT0– 15–23 15–23 CNTL_OUT8 24 24 DE_OUT 25 CCOGND 26, 38 26, 38 ...

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 _______________________________________________________________________________________ LVTTL/LVCMOS Lock Indicator Output. Outputs are valid when LOCK is low. ...

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 PCLK_OUT RGB_OUT CNTL_OUT HIGH IMPEDANCE DE_OUT HIGH IMPEDANCE LOCK NOTE: R/F = HIGH Figure 8 ...

Page 11

... 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 OUTEN MAX9250 DE_OUT RGB_OUT[17:0] ACTIVE CNTL_OUT[8:0] Figure 10. Output Disable Time TIME 2.0V MAX9250 t OZ ACTIVE HIGH IMPEDANCE 11 ...

Page 12

... CNTL_OUT[8:0] outputs when DE_OUT is low. The outputs on the MAX9248 are pro- grammable for ±2% or ±4% spread relative to the LVDS input clock frequency, while the MAX9250 has no spread, but has an output-enable input that allows out- put busing. The video phase words are decoded using two overhead bits, EN0 and EN1 ...

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 PLL CONTROL RNG1 PWRDWN MAX9247 CERAMIC RF SURFACE-MOUNT CAPACITOR Figure 13 ...

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

... MAX9250 and Figure 8 for the MAX9248 regarding the synchronization timing diagram. The MAX9248 input-to-output delay can be as low as (4.5t + 8.0) high as (36t T spread-spectrum variations (see Figure 6). The MAX9250 input-to-output delay can be as low as (3.575t + 8) high as (3.725t T 140 120 100 ...

Page 16

... The outputs of two MAX9250s can be bused to form a 2:1 mux with the outputs controlled by the output enable. Wait 30ns between disabling one deserializer (driving OUTEN low) and enabling the second one (dri- ...

Page 17

... The best approach is to keep both MAX9247 and MAX9248 powered down while supplies are ramping up and PCLK_IN of the MAX9247 and REFCLK of the MAX9248/MAX9250 are stabilizing. After all of the power supplies of the MAX9247 and MAX9248/MAX9250 are stable, including ...

Page 18

... Human Body Model, Machine Model, IEC 61000-4-2 and ISO 10605. The ISO 10605 and IEC 61000-4-2 standards specify ESD tolerance for electronic systems. All LVDS inputs on the MAX9248/MAX9250 meet ISO 10605 ESD protection at ±30kV Air-Gap Discharge and ±10kV Contact Discharge and IEC 61000-4-2 ESD protection at ± ...

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

... uenci 9247 and M AX 9248/M AX 9250 secti on 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. ...

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