MAXIM MAX9205, MAX9207 User Manual

General Description

The MAX9205/MAX9207 serializers transform 10-bit­wide parallel LVCMOS/LVTTL data into a serial high­speed bus low-voltage differential signaling (LVDS)
data stream. The serializers typically pair with deserial­izers like the MAX9206/MAX9208, which receive the
serial output and transform it back to 10-bit-wide paral­lel data.

The MAX9205/MAX9207 transmit serial data at speeds
up to 400Mbps and 660Mbps, respectively, over PCB
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 synchroniza­tion 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 power­down 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.

Applications

Features

o Standalone Serializer (vs. SERDES) Ideal for

Unidirectional Links

o Framing Bits for Deserializer Resync Allow Hot

Insertion Without System Interruption

o LVDS Serial Output Rated for Point-to-Point and

Bus Applications

o Wide Reference Clock Input Range

16MHz to 40MHz (MAX9205)
40MHz to 66MHz (MAX9207)

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

DS92LV1023

MAX9205/MAX9207

10-Bit Bus LVDS Serializers

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

19-2029; Rev 1; 11/10

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.

EVALUATION KIT

AVAILABLE

Pin Configuration and Functional Diagram appear at end of
data sheet.

Typical Application Circuit

Cellular Phone Base
Stations

Add Drop Muxes
Digital Cross-Connects

DSLAMs
Network Switches and

Routers
Backplane Interconnect

+

Denotes a lead(Pb)-free/RoHS-compliant package.

/V denotes an automotive qualified part.

PART

MAX9205EAI+ -40°C to +85°C 28 SSOP 16 to 40

M AX 9205E AI/V + -40°C to +85°C 28 SSOP 16 to 40

MAX9207EAI+ -40°C to +85°C 28 SSOP 40 to 66

TEMP

RANGE

PIN­PACKAGE

REF CLOCK

RANGE

(MHz)

BUS

OUT+

IN_

TCLK_R/F

TCLK

SYNC 1

SYNC 2

10

INPUT LATCH

PARALLEL-TO-SERIAL

TIMING AND

PLL

CONTROL

MAX9205
MAX9207

100Ω 100Ω

OUT-

EN
PWRDN

LVDS

PCB OR

TWISTED PAIR

IN+

10

OUT_

IN-

TIMING AND

PLL

MAX9206
MAX9208

CLOCK

RECOVERY

OUTPUT LATCH

SERIAL-TO-PARALLEL

CONTROL

REFCLK
EN
LOCK

RCLK
RCLK_R/F

MAX9205/MAX9207

10-Bit Bus LVDS Serializers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(V

AVCC

= V

DVCC

= +3.0V to +3.6V, RL= 27Ω ±1% or 50Ω ±1%, CL= 10pF, TA= -40°C to +85°C. Typical values are at V

AVCC

=

V

DVCC

= +3.3V and TA= +25°C, unless otherwise noted.) (Notes 1, 2, 3)

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.

AVCC, DVCC to GND..........................……………-0.3V to +4.0V

IN_, SYNC1, SYNC2, EN, TCLK_R/F, TCLK,

PWRDN to GND......................................-0.3V to (V

CC

+ 0.3V)

OUT+, OUT- to GND .............................................-0.3V to +4.0V

Output Short-Circuit Duration.....................................Continuous

Continuous Power Dissipation (T

A

= +70°C)

28-Pin SSOP (derate 9.5mW/°C above +70°C) ..........762mW

Storage Temperature Range .............................-65°C to +150°C

Junction Temperature......................................................+150°C

Operating Temperature Range ...........................-40°C to +85°C

ESD Protection (Human Body Model, OUT+, OUT-) ...........±8kV

Lead Temperature (soldering, 10s) .................................+300°C

Soldering Temperature (reflow) .......................................+260°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LVCMOS/LVTLL LOGIC INPUTS (IN0 TO IN9, EN, SYNC1, SYNC2, TCLK, TCLK_R/F, PWRDN)

High-Level Input Voltage V

Low-Level Input Voltage V

Input Current I

IH

IL

V

IN

= 0V or V

IN_

BUS LVDS OUTPUTS (OUT+, OUT-)

Differential Output Voltage V

Change in VOD Between
Complementary Output States

ΔV

Output Offset Voltage V

Change in V
Complementary Output States

Between

OS

ΔV

Output Short-Circuit Current I

Output High-Impedance Current I

Power-Off Output Current I

OD

OS

OS

OZ

OX

Figure 1

Figure 1 1 35 mV

OD

Figure 1 0.9 1.15 1.3 V

Figure 1 3 35 mV

OS

V

or V

OUT+

IN0 to IN9 = PWRDN = EN = high

V
V

V

PWRDN

OUT+

_VCC

or V

= 0V, V

or VEN = 0.8V,

POWER SUPPLY

RL = 27_ or 50_

Supply Current I

CC

worst-case pattern
(Figures 2, 4)

Power-Down Supply Current I

CCX

PWRDN = low 8 mA

2.0 V

GND 0.8 V

-20 +20 µA

-13 -15 mA

-10 +10 µA

OUT-

OUT-

_VCC

= 0V,

= 0V or V

or V

OUT+

R

= 27Ω 200 286 400 mV

L

R

= 50Ω 250 460 600 mV

L

_VCC

= 0V or 3.6V -10 +10 µA

OUT-

MAX9205

MAX9207

16MHz 23 35

40MHz 34 45

40MHz 32 50

66MHz 45 60

CC

mA

V

MAX9205/MAX9207

10-Bit Bus LVDS Serializers

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS

(V

AVCC

= V

DVCC

= +3.0V to +3.6V, RL= 27Ω ±1% or 50Ω ±1%, CL= 10pF, TA= -40°C to +85°C. Typical values are at V

AVCC

=

V

DVCC

= +3.3V and TA= +25°C, unless otherwise noted.) (Notes 2, 4)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

TRANSMIT CLOCK (TCLK) TIMING REQUIREMENTS

TCLK Center Frequency f

TCCF

MAX9205 16 40 MHz

MAX9207 40 66 MHz

TCLK Frequency Variation TCFV -200 200 ppm

TCLK Period t

TCP

MAX9205 25 62.5

MAX9207 15.15 25

ns

TCLK Duty Cyc le TCDC 40 60 %

TCLK Input Transition Time t

TCLK Input Jitter t

Figure 3 3 6 ns

CLKT

150

JIT

ps

(RMS)

SWITCHING CHARACTERISTICS

Low-to-High Tran sition Time t

High-to-Low Tran sition Time t

Figure 4

LHT

Figure 4

HLT

RL = 27 150 300 400

R

= 50 150 350 500

L

RL = 27 150 300 400

= 50 150 350 500

R

L

ps

ps

IN_ Setup to TCLK tS Figure 5 1 ns

IN_ Hold from TCLK tH Figure 5 3 ns

OUTPUT High State to High­Impedance Dela y

OUTPUT Low State to High­Impedance Dela y

OUTPUT High Impedance to
High-State Delay

OUTPUT High Impedance to
Low-State Delay

SYNC Pulse Width t

PLL Lock Time tPL Figure 7

Bus LVDS Bit Width t

Serializer Delay tSD Figure 8 t

Figures 6, 7 4.5 10 ns

t

HZ

Figures 6, 7 4.5 10 ns

t

LZ

Figures 6, 7 4.5 10 ns

t

ZH

Figures 6, 7 4.5 10 ns

t

ZL

6 x t

SPW

t

BIT

ns

TCP

2048 x

t

TCP

/ 6

TCP

TCP

2049 x

t

TCP

/12 ns

(t

TCP

+ 5

/6)

ns

ns

MAX9205/MAX9207

10-Bit Bus LVDS Serializers

4 _______________________________________________________________________________________

Typical Operating Characteristics

(V

AVCC

= V

DVCC

= +3.3V, RL= 27Ω, CL = 10pF, TA = +25°C, unless otherwise noted.)

10

30

20

40

50

3.0 3.3 3.6

WORST-CASE PATTERN SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX9205 toc01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

TCLK = 40MHz
MAX9205

10

30

20

40

50

3.0 3.3 3.6

WORST-CASE PATTERN SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX9205 toc01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

TCLK = 40MHz
MAX9205

AC ELECTRICAL CHARACTERISTICS (continued)

(V

AVCC

= V

DVCC

= +3.0V to +3.6V, RL= 27Ω ±1% or 50Ω ±1%, CL= 10pF, TA= -40°C to +85°C. Typical values are at V

AVCC

=

V

DVCC

= +3.3V and TA= +25°C, unless otherwise noted.) (Notes 2, 4)

Note 1: Current into a pin is defined as positive. Current out of a pin is defined as negative. All voltages are referenced to ground

except V

OD

, ΔVOD, and VOS.

Note 2: CLincludes scope probe and test jig capacitance.
Note 3: Parameters 100% tested at T

A

= +25°C. Limits over operating temperature range guaranteed by design and characterization.

Note 4: AC parameters are guaranteed by design and characterization.

Determinist ic Jitter (Figure 9) t

Random Jitter (Figure 10) t

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MAX9205

DJIT

MAX9207

MAX9205

RJIT

MAX9207

16MHz 200

40MHz 140

40MHz 140

66MHz 140

16MHz 13

40MHz 9

40MHz 9

66MHz 6

ps

(pk-pk)

ps

(RMS)