MAX9234 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – Hot-Swappable, 21-Bit, DC-Balanced LVDS Deserializers

19-3641; Rev 1; 10/07
Hot-Swappable, 21-Bit, DC-Balanced LVDS
Deserializers
General Description
The MAX9234/MAX9236/MAX9238 deserialize three
LVDS serial-data inputs into 21 single-ended
LVCMOS/LVTTL outputs. A parallel-rate LVDS clock
received with the LVDS data streams provides timing for
deserialization. The outputs have a separate supply,
allowing 1.8V to 5V output logic levels. All these devices
are hot-swappable and allow “on-the-fly” frequency
programming.
The MAX9234/MAX9236/MAX9238 feature DC balance,
which allows isolation between a serializer and deseri-
alizer using AC-coupling. Each deserializer decodes
data transmitted by one of the MAX9209/MAX9211/
MAX9213/MAX9215 serializers.
The MAX9234 has a rising-edge output strobe. The
MAX9236/MAX9238 have a falling-edge output strobe.
The MAX9234/MAX9236/MAX9238 operate in DC-
balanced mode only.
The MAX9234/MAX9236 operate with a parallel input
clock of 8MHz to 34MHz, while the MAX9238 operates
from 16MHz to 66MHz. The transition time of the single-
ended outputs is increased on the low-frequency version
parts (MAX9234/MAX9236) for reduced EMI. The LVDS
inputs meet ISO 10605 ESD specification, ±25kV for Air-
Gap Discharge and ±8kV Contact Discharge.
The MAX9234/MAX9236/MAX9238 are available in 48-pin
TSSOP packages and operate over the -40°C to +85°C
temperature range.
Applications
Automotive Navigation Systems
Automotive DVD Entertainment Systems
Digital Copiers
Laser Printers
Features
♦ DC Balance Allows AC-Coupling for Wider Input
Common-Mode Voltage Range
♦ On-the-Fly Frequency Programming
♦ Operating Frequency Range
8MHz to 34MHz (MAX9234/MAX9236)
16MHz to 66MHz (MAX9238)
♦ Falling-Edge Output Strobe (MAX9236/MAX9238)
♦ Slower Output Transitions for Reduced EMI
(MAX9234/MAX9236)
♦ High-Impedance Outputs when PWRDWN Is Low
Allow Output Busing
♦ 5V-Tolerant PWRDWN Input
♦ PLL Requires No External Components
♦ Up to 1.386Gbps Throughput
♦ Separate Output Supply Pins Allow Interface to
1.8V, 2.5V, 3.3V, and 5V Logic
♦ LVDS Inputs Meet ISO 10605 ESD Requirements
♦ LVDS Inputs Conform to ANSI TIA/EIA-644 LVDS
Standard
♦ Low-Profile, 48-Lead TSSOP Package
♦ +3.3V Main Power Supply
♦ -40°C to +85°C Operating Temperature Range
PART
MAX9234EUM
MAX9236EUM
MAX9238EUM
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
48 TSSOP
48 TSSOP
48 TSSOP
PKG
CODE
U48-1
U48-1
U48-1
Functional Diagram and Pin Configuration appear at end of
data sheet.
________________________________________________________________ Maxim Integrated Products 1
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.