19-2029; Rev 0; 5/01
10-Bit Bus LVDS Serializers
General Description
Features
The MAX9205/MAX9207 serializers transform 10-bit-
wide parallel LVCMOS/LVTTL data into a serial high-
speed bus low-voltage differential signaling (LVDS)
data stream. The serializers typically pair with deserial-
izers like the MAX9206*/MAX9208*, which receive the
serial output and transform it back to 10-bit-wide paral-
lel data.
ꢀ Standalone Serializer (vs. SERDES) Ideal for
Unidirectional Links
ꢀ Framing Bits for Deserializer Resync Allow Hot
Insertion Without System Interruption
ꢀ LVDS Serial Output Rated for Point-to-Point and
Bus Applications
The MAX9205/MAX9207 transmit serial data at speeds
up to 400Mbps and 660Mbps, respectively, over PC
board traces or twisted-pair cables. Since the clock is
recovered from the serial data stream, clock-to-data
and data-to-data skew that would be present with a
parallel bus are eliminated.
ꢀ Wide Reference Clock Input Range
16MHz to 40MHz (MAX9205)
40MHz to 66MHz (MAX9207)
ꢀ Low 140ps (pk-pk) Deterministic Jitter (MAX9207)
ꢀ Low 34mA Supply Current (MAX9205)
The serializers require no external components and few
control signals. The input data strobe edge is selected
by TCLK_R/F. PWRDN is used to save power when the
devices are not in use. Upon power-up, a synchroniza-
tion mode is activated, which is controlled by two SYNC
inputs, SYNC1 and SYNC2.
ꢀ 10-Bit Parallel LVCMOS/LVTTL Interface
ꢀ Up to 660Mbps Payload Data Rate (MAX9207)
ꢀ Programmable Active Edge on Input Latch
ꢀ Pin-Compatible Upgrades to DS92LV1021 and
The MAX9205 can lock to a 16MHz to 40MHz system
clock, while the MAX9207 can lock to a 40MHz to
66MHz system clock. The serializer output is held in
high impedance until the device is fully locked to the
local system clock, or when the device is in power-
down mode.
DS92LV1023
Ordering Information
TEMP.
RANGE
PIN-
REF CLOCK
PART
Both the devices operate from a single +3.3V supply,
are specified for operation from -40°C to +85°C, and
are available in 28-pin SSOP packages.
PACKAGE RANGE (MHz)
MAX9205EAI -40 C to +85 C
MAX9207EAI -40 C to +85 C
28 SSOP
28 SSOP
16 to 40
40 to 66
Applications
Cellular Phone Base
Stations
Add Drop Muxes
DSLAMs
Network Switches and
Routers
Pin Configuration and Functional Diagram appear at end of
data sheet.
Digital Cross-Connects
Backplane Interconnect
Typical Application Circuit
BUS
LVDS
OUT+
IN+
10
10
100
100
OUT_
IN_
OUT-
IN-
TCLK_R/F
TCLK
PC BOARD OR
TWISTED PAIR
REFCLK
EN
LOCK
EN
TIMING AND
CONTROL
TIMING AND
CONTROL
PLL
PLL
PWRDN
SYNC 1
SYNC 2
RCLK
CLOCK
RECOVERY
MAX9205
MAX9207
MAX9206*
MAX9208*
RCLK_R/F
*FUTURE PRODUCT
*Future product–contact factory for availability.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.