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MAX9244EUM/V+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23
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-
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.
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)
♦
ππ
/ 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
MAX9242/MAX9244/MAX9246/MAX9254
21-Bit Deserializers with Programmable
Spread Spectrum and DC Balance
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
19-3954; Rev 4; 7/09
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.
PART TEMP RANGE PIN-PACKAGE
MAX9242EUM -40°C to +85°C 48 TSSOP
MAX9242EUM/V+ -40°C to +85°C 48 TSSOP
MAX9242GUM -40°C to +105°C 48 TSSOP
MAX9242GUM/V+ -40°C to +105°C 48 TSSOP
MAX9244EUM -40°C to +85°C 48 TSSOP
MAX9244EUM/V+ -40°C to +85°C 48 TSSOP
MAX9244GUM -40°C to +105°C 48 TSSOP
MAX9244GUM/V+ -40°C to +105°C 48 TSSOP
+
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.
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.
Ordering Information continued at end of data sheet.
EVALUATION KIT
AVAILABLE
MAX9242/MAX9244/MAX9246/MAX9254
21-Bit Deserializers with Programmable
Spread Spectrum and DC Balance
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= LVDSV
CC
= PLLV
CC
= +3.0V to +3.6V, V
CCO
= +3.0V to +5.5V, PWRDWN = high; SSG = high, open, or low; DCB = high or
low, differential input voltage |V
ID
| = 0.05V to 1.2V, input common-mode voltage V
CM
= |V
ID
/ 2| to 2.4V - |V
ID
/ 2|, unless otherwise
noted. Typical values are at V
CC
= V
CCO
= LVDSV
CC
= PLLV
CC
= +3.3V, |V
ID
| = 0.2V, V
CM
= +1.25V, T
A
= +25°C.) (Notes 1, 2)
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.
(All voltages referenced to GND.)
V
CC
, LVDSV
CC
, PLLV
CC
.......................................-0.5V to +4.0V
V
CCO
......................................................................-0.5V to +6.0V
RxIN__, RxCLKIN_.................................................-0.5V to +4.0V
PWRDWN ..............................................................-0.5V to +6.0V
SSG, DCB...................................................-0.5V to (V
CC
+ 0.5V)
RxOUT_, RxCLKOUT ...............................-0.5V to (V
CCO
+ 0.5V)
Continuous Power Dissipation (T
A
= +70°C)
48-Pin TSSOP (derate 16mW/°C above +70°C) ........1282mW
ESD Protection
Human Body Model (R
D
= 1.5kΩ, C
S
= 100pF)
All Pins to GND .............................................................±2.5kV
IEC 61000-4-2 (R
D
= 330Ω, C
S
= 150pF)
LVDS Inputs to GND (Air-Gap Discharge).....................±15kV
LVDS Inputs to GND (Contact Discharge).......................±8kV
ISO 10605 (R
D
= 2.0kΩ, C
S
= 330pF)
LVDS Inputs to GND (Air-Gap Discharge).....................±30kV
LVDS Inputs to GND (Contact Discharge).......................±6kV
Operating Temperature Range .........................-40°C to +105°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER SUPPLY
Power-Supply Range
V
CC
,
LVDSV
CC
,
PLLV
CC
3.0 3.6 V
Output-Supply Range V
CCO
1.8 5.5 V
16MHz 50 68
DC-balanced
mode (SSG = low)
34MHz 81 108
20MHz 55 73
33MHz 75 97
Non-DC-balanced
mode (SSG = low)
40MHz 83 110
16MHz 62 85
D C - b al anced m od e
( S SG = hi g h or op en)
34MHz 101 135
20MHz 67 91
33MHz 93 123
Worst-Case Supply Current I
CCW
C
L
= 8pF,
worst-case pattern,
V
CC
= V
CCO
= 3.0V
to 3.6V, Figure 2
(MAX9242,
MAX9244,
MAX9254)
N on- D C -b al anced
m ode
( S SG = hi g h or op en)
40MHz 107 134
mA
MAX9242/MAX9244/MAX9246/MAX9254
21-Bit Deserializers with Programmable
Spread Spectrum and DC Balance
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= LVDSV
CC
= PLLV
CC
= +3.0V to +3.6V, V
CCO
= +3.0V to +5.5V, PWRDWN = high; SSG = high, open, or low; DCB = high or
low, differential input voltage |V
ID
| = 0.05V to 1.2V, input common-mode voltage V
CM
= |V
ID
/ 2| to 2.4V - |V
ID
/ 2|, unless otherwise
noted. Typical values are at V
CC
= V
CCO
= LVDSV
CC
= PLLV
CC
= +3.3V, |V
ID
| = 0.2V, V
CM
= +1.25V, T
A
= +25°C.) (Notes 1, 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
6MHz 29 45
8MHz 33 49
DC-balanced
mode (SSG = low)
18MHz 48 69
8MHz 33 47
10MHz 37 52
Non-DC-balanced
mode (SSG = low)
20MHz 52 73
6MHz 37 54
8MHz 41 62
D C -b al anced m od e
( S SG = hi g h or op en)
18MHz 65 91
8MHz 41 58
10MHz 46 65
Worst-Case Supply Current I
CCW
C
L
= 8pF,
worst-case pattern,
V
CC
= V
CCO
= 3.0V
to 3.6V, Figure 2
(MAX9246)
N on- D C -b al anced
m ode
( S SG = hi g h or op en)
20MHz 66 92
mA
Power-Down Supply Current I
CCZ
PWRDWN = low 50 µA
5V-TOLERANT LOGIC INPUT (PWRDWN)
High-Level Input Voltage V
IH
2.0 5.5 V
Low-Level Input Voltage V
IL
-0.3 +0.8 V
Input Current I
IN
PWRDWN = high or low level -20 +20 µA
Input Clamp Voltage V
CL
I
CL
= -18mA -1.5 V
THREE-LEVEL LOGIC INPUTS (DCB, SSG)
High-Level Input Voltage V
IH
2.5
V
CC
+
0.3
V
Mid-Level Input Current I
IM
D C B, S S G op en or connected to a d r i ver w i th
outp ut i n hi g h- i m p ed ance state ( N ote 3)
-10 +10 µA
Low-Level Input Voltage V
IL
-0.3 +0.8 V
Input Current I
IN
DCB, SSG = high or low level,
PWRDWN = high or low
-20 +20 µA
Input Clamp Voltage V
CL
I
CL
= -18mA -1.5 V
SINGLE-ENDED OUTPUTS (RxOUT_, RxCLKOUT)
I
OH
= -100µA
V
CCO
- 0.1
RxCLKOUT (Note 4)
V
CCO
- 0.25
V
CCO
- 0.43
High-Level Output Voltage V
OH
I
OH
= -2mA
RxOUT_
MAX9254
V
CCO
- 0.25
V
I
OL
= 100µA 0.1
RxCLKOUT (Note 4) 0.2
0.26
Low-Level Output Voltage V
OL
I
OL
= 2mA
RxOUT_
MAX9254 0.2
V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23

MAX9244EUM/V+T

Mfr. #:
Buy MAX9244EUM/V+T
Manufacturer:
Maxim Integrated
Description:
Serializers & Deserializers - Serdes 21-Bit DC-Balanced LVDS Deserialize
Lifecycle:
New from this manufacturer.
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