max9205eait Maxim Integrated Products, Inc., max9205eait Datasheet

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max9205eait

Manufacturer Part Number
max9205eait
Description
10-bit, Bus Lvds Serializers
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
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.
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.
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.
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.
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.
19-2029; Rev 0; 5/01
*Future product–contact factory for availability.
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.
Cellular Phone Base
Stations
Add Drop Muxes
Digital Cross-Connects
TCLK_R/F
SYNC 1
SYNC 2
TCLK
IN_
10
________________________________________________________________ Maxim Integrated Products
General Description
PLL
TIMING AND
DSLAMs
Network Switches and
Routers
Backplane Interconnect
CONTROL
Applications
MAX9205
MAX9207
OUT+
OUT-
100Ω
EN
PWRDN
10-Bit Bus LVDS Serializers
PC BOARD OR
TWISTED PAIR
*FUTURE PRODUCT
LVDS
BUS
o Standalone Serializer (vs. SERDES) Ideal for
o Framing Bits for Deserializer Resync Allow Hot
o LVDS Serial Output Rated for Point-to-Point and
o Wide Reference Clock Input Range
o Low 140ps (pk-pk) Deterministic Jitter (MAX9207)
o Low 34mA Supply Current (MAX9205)
o 10-Bit Parallel LVCMOS/LVTTL Interface
o Up to 660Mbps Payload Data Rate (MAX9207)
o Programmable Active Edge on Input Latch
o Pin-Compatible Upgrades to DS92LV1021 and
Pin Configuration and Functional Diagram appear at end of
data sheet.
M A X9 2 0 5 E AI
M A X9 2 0 7 E AI
Unidirectional Links
Insertion Without System Interruption
Bus Applications
DS92LV1023
100Ω
PART
16MHz to 40MHz (MAX9205)
40MHz to 66MHz (MAX9207)
IN+
IN-
MAX9206*
MAX9208*
Typical Application Circuit
-40°C to +85°C
-40°C to +85°C
RANGE
TEMP.
PLL
RECOVERY
Ordering Information
CLOCK
TIMING AND
CONTROL
PIN-
PACKAGE
28 SSOP
28 SSOP
10
OUT_
REFCLK
EN
LOCK
RCLK
RCLK_R/F
Features
RANGE (MHz)
REF CLOCK
16 to 40
40 to 66
1

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max9205eait Summary of contents

Page 1

Rev 0; 5/01 General Description 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 ...

Page 2

Bus LVDS Serializers ABSOLUTE MAXIMUM RATINGS V to GND .........................................……………-0.3V to +4.0V CC IN_, SYNC1, SYNC2, EN, TCLK_R/F, TCLK, PWRDN to GND......................................-0. OUT+, OUT- to GND .............................................-0.3V to +4.0V Output Short-Circuit Duration.....................................Continuous Continuous Power Dissipation (T = ...

Page 3

AC ELECTRICAL CHARACTERISTICS (V = +3.0V to +3.6V 27Ω ±1% or 50Ω ±1 +25°C, unless otherwise noted.) (Notes 2, 4) PARAMETER SYMBOL TRANSMIT CLOCK (TCLK) TIMING REQUIREMENTS TCLK Center Frequency f TCLK Frequency Variation TCLK ...

Page 4

Bus LVDS Serializers AC ELECTRICAL CHARACTERISTICS (continued +3.0V to +3.6V 27Ω ±1% or 50Ω ±1 +25°C, unless otherwise noted.) (Notes 2, 4) PARAMETER SYMBOL Deterministic Jitter (Figure 9) t DJIT Random Jitter ...

Page 5

PIN NAME LVCMOS/LVTTL Logic Inputs. The two SYNC pins are ORed. When at least one of the two pins are asserted high for at least six cycles of TCLK, the serializer initiates a transmission of 1024 SYNC 1, SYNC patterns. ...

Page 6

Bus LVDS Serializers Initialization Mode When V is applied, the outputs are held in high CC impedance and internal circuitry is disabled by on-chip power-on-reset circuitry. When V CC PLL starts to lock to a local reference clock (16MHz ...

Page 7

Applications Information Power-Supply Bypassing Bypass AV with high-frequency surface-mount CC ceramic 0.1µF and 0.001µF capacitors in parallel as close to the device as possible, with the smaller valued capacitor closest Bypass DV CC quency surface-mount ceramic 0.1µF ...

Page 8

Bus LVDS Serializers 10pF OUT+ OUT- 10pF Figure 4. Output Load and Transition Times TCLK IN_ TIMING SHOWN FOR TCLK_R/F = LOW Figure 5. Data Input Setup and Hold Times OUT± Figure ...

Page 9

PWRDN TCLK OUT± HIGH IMPEDANCE SYNC 1 = SYNC 2 = LOW EN = HIGH TCLK_R/F = HIGH Figure 7. PLL Lock Time and PWRDN High-Impedance Delays IN IN0 - IN9 SYMBOL TCLK 1.5V OUT± TCLK_ ...

Page 10

Bus LVDS Serializers The serializers can operate in a variety of topologies. Examples of double-terminated point-to-point, mul- tidrop, point-to-point broadcast, and multipoint topolo- gies are shown in Figures 11 through 14. Use 1% surface-mount termination resistors. A point-to-point connection ...

Page 11

A point-to-point version of the multidrop bus is shown in Figure 13. The low-jitter MAX9150 10-port repeater is used to reproduce and transmit the serializer output over 10 double-terminated point-to-point links. Compared to the multidrop bus, more interconnect is traded ...

Page 12

Bus LVDS Serializers ASIC ASIC MAX9205 MAX9205 MAX9207 MAX9207 54Ω Figure 14. Multipoint Pin Configuration TOP VIEW 1 SYNC1 DV 2 SYNC2 DV 3 IN0 AV 4 IN1 AGND MAX9205 MAX9207 5 IN2 PWRDN 6 IN3 AGND 7 IN4 ...

Page 13

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 ...

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