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MAX9242 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX9242
Description  21-Bit Deserializers with Programmable Spread Spectrum and DC Balance
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX9242 Datasheet(HTML) 1 Page - Maxim Integrated Products

 
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General Description
The MAX9242/MAX9244/MAX9246/MAX9254 deserialize
three LVDS serial-data inputs into 21 single-ended LVC-
MOS/ LVTTL outputs. A separate parallel-rate LVDS clock
provides the timing for deserialization. The MAX9242/
MAX9244/MAX9246/MAX9254 feature spread-spectrum
capability, allowing the output data and clock frequency
to spread over a specified range to reduce EMI. The sin-
gle-ended data and clock outputs are programmable for
a frequency spread of ±2%, ±4%, or no spread. The
spread-spectrum function is also available when the
MAX9242/MAX9244/MAX9246/MAX9254 operate in non-
DC-balanced mode. The modulation rate of the spread is
32kHz for a 33MHz LVDS clock input and scales linearly
with frequency. The single-ended outputs have a sepa-
rate supply, allowing +1.8V to +5V output logic levels.
The MAX9254 features high output drive current for both
data and clock outputs for faster transition times in the
presence of heavy capacitive loads.
The MAX9242/MAX9244/MAX9246/MAX9254 feature pro-
gram-mable DC balance, allowing isolation between a
serializer and deserializer using AC-coupling. The
MAX9242/MAX9244/MAX9246/MAX9254 operate with the
MAX9209/MAX9213 serializers and are available with a
rising-edge strobe (MAX9242) or falling-edge strobe
(MAX9244/MAX9246/MAX9254). The LVDS inputs meet
ISO 10605 ESD specifications with ±30kV Air-Gap
Discharge and ±6kV Contact Discharge ratings.
Applications
Automotive Navigation Systems
Automotive DVD Entertainment Systems
Digital Copiers
Laser Printers
Features
♦ Programmable ±4%, ±2%, or OFF Spread-Spectrum
Output for Reduced EMI
♦ Programmable DC-Balanced or Non-DC-Balanced
Modes
♦ DC Balance Allows AC-Coupling for Wider Input
Common-Mode Voltage Range
♦ Spread Spectrum Operates in DC-Balanced or
Non-DC-Balanced Mode
♦ High Output Drive (MAX9254)
♦ π / 4 Deskew by Oversampling
(MAX9242/MAX9244/MAX9254)
♦ 16MHz-to-34MHz (DC-Balanced) and 20MHz-to-
40MHz (Non-DC-Balanced) Operation
(MAX9242/MAX9244/MAX9254)
♦ 6MHz-to-18MHz (DC-Balanced) and 8MHz-to-20MHz
(Non-DC-Balanced) Operation (MAX9246)
♦ Rising-Edge (MAX9242) or Falling-Edge
(MAX9244/MAX9246/MAX9254) Output Strobe
♦ High-Impedance Outputs when PWRDWN is Low
Allow Output Busing
♦ Separate Output Supply Allows Interface to +1.8V,
+2.5V, +3.3V, and +5V Logic
♦ LVDS Inputs Meet ISO 10605 ESD Protection at
±30kV Air-Gap Discharge and ±6kV Contact
Discharge
♦ LVDS Inputs Meet IEC 61000-4-2 Level 4 ESD
Protection at ±15kV Air-Gap Discharge and ±8kV
Contact Discharge
♦ LVDS Inputs Conform to ANSI TIA/EIA-644 Standard
♦ +3.3V Main Power Supply
21-Bit Deserializers with Programmable
Spread Spectrum and DC Balance
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-3954; Rev 2; 6/07
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.
PART
TEMP RANGE
PIN-PACKAGE
PKG
CODE
MAX9242EUM
-40°C to +85°C
48 TSSOP
U48-1
MAX9242GUM
-40°C to +105°C
48 TSSOP
U48-1
MAX9244EUM
-40°C to +85°C
48 TSSOP
U48-1
MAX9244GUM
-40°C to +105°C
48 TSSOP
U48-1
MAX9246EUM
-40°C to +85°C
48 TSSOP
U48-1
MAX9246GUM
-40°C to +105°C
48 TSSOP
U48-1
MAX9254EUM
-40°C to +85°C
48 TSSOP
U48-1
Devices are available in lead-free packaging. Specify lead free
by adding a + symbol at the end of the part number when
ordering.
Selector Guide
FREQUENCY RANGE
PART
STROBE
EDGE
OVER-
SAMPLING
NON-DC
BALANCE
(MHz)
DC
BALANCE
(MHz)
MAX9242
Rising
Yes
20 to 40
16 to 34
MAX9244
Falling
Yes
20 to 40
16 to 34
MAX9246
Falling
No
8 to 20
6 to 18
MAX9254
Falling
Yes
20 to 40
16 to 34
Pin Configuration appears at end of data sheet.


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