MAX9246EUM+TD Maxim Integrated Products, MAX9246EUM+TD Datasheet

IC 21BIT DESERIALIZER 48-TSSOP

MAX9246EUM+TD

Manufacturer Part Number
MAX9246EUM+TD
Description
IC 21BIT DESERIALIZER 48-TSSOP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX9246EUM+TD

Function
Deserializer
Data Rate
306Mbps
Input Type
LVDS
Output Type
LVTTL, LVCMOS
Number Of Inputs
3
Number Of Outputs
21
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
48-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
19-3954; Rev 4; 7/09
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-
grammable 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.
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.
Pin Configuration appears at end of data sheet.
MAX9242
MAX9244
MAX9246
MAX9254
PART
Automotive Navigation Systems
Automotive DVD Entertainment Systems
Digital Copiers
Laser Printers
STROBE
Falling
Falling
Falling
EDGE
Rising
________________________________________________________________ Maxim Integrated Products
21-Bit Deserializers with Programmable
SAMPLING
OVER-
General Description
Yes
Yes
Yes
No
Selector Guide
BALANCE
Spread Spectrum and DC Balance
FREQUENCY RANGE
NON-DC
20 to 40
20 to 40
20 to 40
8 to 20
Applications
(MHz)
BALANCE
16 to 34
16 to 34
16 to 34
6 to 18
(MHz)
DC
♦ Programmable ±4%, ±2%, or OFF Spread-Spectrum
♦ Programmable DC-Balanced or Non-DC-Balanced
♦ DC Balance Allows AC-Coupling for Wider Input
♦ Spread Spectrum Operates in DC-Balanced or
♦ High Output Drive (MAX9254)
♦ π π / 4 Deskew by Oversampling
♦ 16MHz-to-34MHz (DC-Balanced) and 20MHz-to-
♦ 6MHz-to-18MHz (DC-Balanced) and 8MHz-to-20MHz
♦ Rising-Edge (MAX9242) or Falling-Edge
♦ High-Impedance Outputs when PWRDWN is Low
♦ Separate Output Supply Allows Interface to +1.8V,
♦ LVDS Inputs Meet ISO 10605 ESD Protection at
♦ LVDS Inputs Meet IEC 61000-4-2 Level 4 ESD
♦ LVDS Inputs Conform to ANSI TIA/EIA-644 Standard
♦ +3.3V Main Power Supply
+ Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Note: All devices are available in lead(Pb)-free/RoHS-compliant
packaging. Specify lead(Pb)-free/RoHS compliant by adding a
+ symbol at the end of the part number when ordering.
Ordering Information continued at end of data sheet.
MAX9242EUM
MAX9242EUM/V+
MAX9242GUM
MAX9242GUM/V+
MAX9244EUM
MAX9244EUM/V+
MAX9244GUM
MAX9244GUM/V+
Output for Reduced EMI
Modes
Common-Mode Voltage Range
Non-DC-Balanced Mode
(MAX9242/MAX9244/MAX9254)
40MHz (Non-DC-Balanced) Operation
(MAX9242/MAX9244/MAX9254)
(Non-DC-Balanced) Operation (MAX9246)
(MAX9244/MAX9246/MAX9254) Output Strobe
Allow Output Busing
+2.5V, +3.3V, and +5V Logic
±30kV Air-Gap Discharge and ±6kV Contact
Discharge
Protection at ±15kV Air-Gap Discharge and ±8kV
Contact Discharge
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 TSSOP
48 TSSOP
48 TSSOP
48 TSSOP
48 TSSOP
48 TSSOP
48 TSSOP
48 TSSOP
Features
1

Related parts for MAX9246EUM+TD

MAX9246EUM+TD Summary of contents

Page 1

... MAX9254 Falling Yes Pin Configuration appears at end of data sheet. ________________________________________________________________ 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. ♦ Programmable ±4%, ±2%, or OFF Spread-Spectrum Output for Reduced EMI ♦ Programmable DC-Balanced or Non-DC-Balanced Modes ♦ ...

Page 2

Deserializers with Programmable Spread Spectrum and DC Balance ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND LVDSV , PLLV .......................................-0.5V to +4. ......................................................................-0.5V to +6.0V CCO RxIN__, RxCLKIN_.................................................-0.5V to +4.0V PWRDWN ..............................................................-0.5V to ...

Page 3

Deserializers with Programmable Spread Spectrum and DC Balance DC ELECTRICAL CHARACTERISTICS (continued LVDSV = PLLV = +3.0V to +3.6V low, differential input voltage | 0.05V to 1.2V, input common-mode voltage V ...

Page 4

Deserializers with Programmable Spread Spectrum and DC Balance DC ELECTRICAL CHARACTERISTICS (continued LVDSV = PLLV = +3.0V to +3.6V low, differential input voltage | 0.05V to 1.2V, input common-mode voltage V ...

Page 5

Deserializers with Programmable Spread Spectrum and DC Balance AC ELECTRICAL CHARACTERISTICS (continued LVDSV = PLLV = +3.0V to +3.6V DCB = high or low, differential input voltage |V otherwise noted. Typical values are ...

Page 6

Deserializers with Programmable Spread Spectrum and DC Balance FAIL-SAFE IN2 COMPARATOR RxIN_ + OR RxIN_ + OR RxCLKIN+ RxCLKIN 0. IN1 IN1 R R IN1 IN1 RxIN_ - OR RxIN_ - ...

Page 7

Deserializers with Programmable Spread Spectrum and DC Balance RCOP 2.0V 2.0V RxCLKOUT 0.8V RCOH RSRC 2.0V RxOUT_ 0.8V Figure 5b. Falling-Edge Output Setup/Hold and High/Low Times RCIP + RxCLKIN_ RCCD RxCLKOUT 1.5V Figure 6b. ...

Page 8

Deserializers with Programmable Spread Spectrum and DC Balance SSG RxCLKIN_ RxCLKOUT RxOUT_ TIMING SHOWN FOR FALLING-EDGE STROBE (MAX9244/MAX9246/MAX9254) PWRDWN = HIGH Figure 9. Phase-Locked-Loop Set Time from SSG Change FREQUENCY SSM f (MAX) RxCLKOUT f RxCLKIN_ ...

Page 9

Deserializers with Programmable Spread Spectrum and DC Balance (V = PLLV = LVDSV = V = +3.3V CCO voltage V = 1.2V +25°C, MAX9244/MAX9254, unless otherwise noted WORST-CASE AND PRBS SUPPLY ...

Page 10

Deserializers with Programmable Spread Spectrum and DC Balance (V = PLLV = LVDSV = V = +3.3V CCO voltage V = 1.2V +25°C, MAX9244/MAX9254, unless otherwise noted RxCLKOUT POWER SPECTRUM vs. ...

Page 11

Deserializers with Programmable Spread Spectrum and DC Balance PIN NAME 1 RxOUT17 Channel 2 Single-Ended Outputs 2 RxOUT18 3, 25, 32, GND Ground 38 RxOUT19 Channel 2 Single-Ended Outputs 5 RxOUT20 Three-Level-Logic, Spread-Spectrum Generator Control Input. SSG ...

Page 12

Deserializers with Programmable Spread Spectrum and DC Balance PIN NAME 34 RxOUT7 35 RxOUT8 37 RxOUT9 Channel 1 Single-Ended Outputs 39 RxOUT10 40 RxOUT11 41 RxOUT12 Digital Supply Voltage. Bypass pin as possible. 43 RxOUT13 ...

Page 13

Deserializers with Programmable Spread Spectrum and DC Balance Detailed Description The MAX9242/MAX9244/MAX9246/MAX9254 deserialize three LVDS serial-data inputs into 21 single-ended LVC- MOS/LVTTL outputs. The outputs are programmable for no spread or for a spread of ±2% or ±4%, relative ...

Page 14

Deserializers with Programmable Spread Spectrum and DC Balance + - RxCLKIN_ CYCLE DCA2 DCB2 TxIN20 TxIN19 TxIN18 RxIN2_ DCA1 DCB1 TxIN13 TxIN12 TxIN11 RxIN1_ DCA0 TxIN6 TxIN5 TxIN4 DCB0 RxIN0_ TxIN_, DCA_, AND DCB_ ARE DATA ...

Page 15

Deserializers with Programmable Spread Spectrum and DC Balance ±4% OR ±2% SPREAD SSG RxCLKOUT RxOUT_ Figure 13. Output Waveforms when Spread Amount is Changed SSG NO SPREAD RxCLKOUT RxOUT_ Figure 14. Output Waveforms when Spread is Added ±4% OR ...

Page 16

Deserializers with Programmable Spread Spectrum and DC Balance INTERNAL PLL1 LOCK INTERNAL SSPLL LOCK RxCLKOUT RxOUT_ Figure 16. Output Waveforms when PLL1 Loses Lock and Locks Again INTERNAL SSPLL LOCK RxCLKOUT RxOUT_ TIMING SHOWN FOR STABLE CLOCK AND DATA ...

Page 17

Deserializers with Programmable Spread Spectrum and DC Balance MAX9209/MAX9213 7 7:1 7 TxIN 7:1 7 7:1 PWRDWN PLL TxCLK IN 21:3 SERIALIZER Figure 18. DC-Coupled Link, Non-DC-Balanced Mode R is required to match the transmission line impedance T (usually ...

Page 18

Deserializers with Programmable Spread Spectrum and DC Balance MAX9209/MAX9213 2):1 7 TxIN (7 + 2): 2):1 PWRDWN PLL TxCLK IN 21:3 SERIALIZER Figure 19. Two Capacitors per Link, AC-Coupled, DC-Balanced Mode The capacitor ...

Page 19

Deserializers with Programmable Spread Spectrum and DC Balance MAX9209/MAX9213 2):1 7 TxIN (7 + 2): 2):1 PWRDWN PLL TxCLK IN 21:3 SERIALIZER Figure 20. Four Capacitors per Link, AC-Coupled, DC-Balanced Mode Link Power-Up ...

Page 20

Deserializers with Programmable Spread Spectrum and DC Balance trace used (microstrip or stripline). Note that two 50Ω PC board traces do not have 100Ω differential imped- ance when brought close together—the impedance goes down when the traces are brought ...

Page 21

Deserializers with Programmable Spread Spectrum and DC Balance SSG and DCB provides the proper mid-level voltage under conditions of low input current. The mid-level input current must not be greater than ±10µA, and the mid-level logic state cannot be ...

Page 22

Deserializers with Programmable Spread Spectrum and DC Balance Ordering Information (continued) PART TEMP RANGE MAX9246EUM -40°C to +85°C MAX9246EUM/V+ -40°C to +85°C MAX9246GUM -40°C to +105°C MAX9246GUM/V+ -40°C to +105°C MAX9254EUM -40°C to +85°C MAX9254EUM/V+ -40°C to +85°C + ...

Page 23

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23 © 2009 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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