MAXIM MAX9171, MAX9172 User Manual

General Description

The MAX9171/MAX9172 single/dual low-voltage differential
signaling (LVDS) receivers are designed for high-speed
applications requiring minimum power consumption,
space, and noise. Both devices support switching rates
exceeding 500Mbps while operating from a single 3.3V
supply.

The MAX9171 is a single LVDS receiver and the
MAX9172 is a dual LVDS receiver. Both devices con­form to the ANSI TIA/EIA-644 LVDS standard and con­vert LVDS to LVTTL/LVCMOS-compatible outputs. A
fail-safe feature sets the outputs high when the inputs
are undriven and open, terminated, or shorted. The
MAX9171/MAX9172 are available in 8-pin SO packages
and space-saving thin DFN and SOT23 packages.

For lower skew devices, refer to the MAX9111/ MAX9113
data sheet.

Applications

Multipoint Backplane Interconnect

Laser Printers

Digital Copiers

Cellular Phone Base Stations

LCD Displays

Network Switches/Routers

Clock Distribution

Features

♦ Input Accepts LVDS and LVPECL

♦ In-Path Fail-Safe Circuit

♦ Space-Saving 8-Pin TDFN and SOT23 Packages

♦ Fail-Safe Circuitry Sets Output High for Open,

Undriven Shorted, or Undriven Terminated Output

♦ Flow-Through Pinout Simplifies PCB Layout

♦ Guaranteed 500Mbps Data Rate

♦ Second Source to DS90LV018A and DS90LV028A

(SO Packages Only)

♦ Conforms to ANSI TIA/EIA-644 Standard

♦ 3.3V Supply Voltage

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

♦ Low-Power Dissipation

MAX9171/MAX9172

Single/Dual LVDS Line Receivers with

“In-Path” Fail-Safe

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-2578; Rev 2; 6/07

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 PIN-PACKAGE

TOP

PKG

CODE

MAX9171EKA-T

8 SOT23-8 AALX K8-1

MAX9171ESA 8 SO — S8-2

MAX9171ETA*

—

T833-2

MAX9172EKA-T

8 SOT23-8 AALY K8-1

MAX9172ESA 8 SO — S8-2

MAX9172ETA*

—

T833-2

1

2

3

4

5

6

7

8

SO/TDFN*

IN-

IN+

N.C.

N.C.

GND

N.C.

OUT

V

CC

IN-

IN+

N.C.

N.C.

GND

N.C.

OUT

V

CC

IN1-

IN1+

IN2+

IN2-

GND

OUT2

OUT1

V

CC

IN1-

IN1+

IN2-

OUT2

GND

IN2+

OUT1

V

CC

MAX9171

1

2

3

4

5

6

7

8

SO/TDFN*

MAX9172

1

2

3

4

5

6

7

8

SOT23

MAX9172

1

2

3

4

8

7

6

5

SOT23

MAX9171

Pin Configurations

Note: All devices are specified over the -40°C to +85°C operating
temperature range.

*Future product—contact factory for availability.
**EP = Exposed pad.

T = Tape-and-reel.

MARK

8 Thin DFN-EP**

8 Thin DFN-EP**

MAX9171/MAX9172

Single/Dual LVDS Line Receivers with
“In-Path” Fail-Safe

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= 3.0V to 3.6V, differential input voltage |VID| = 0.1V to 1.2V, receiver input voltage = 0 to VCC, common-mode voltage VCM=
|V

ID

/2| to (VCC- |VID/2|), TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= 3.3V, |VID| = 0.2V, VCM= 1.2V,

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.

VCCto GND...........................................................-0.3V to +4.0V

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

OUT_ to GND ............................................-0.3V to (VCC+ 0.3V)

Continuous Power Dissipation (TA= +70°C)

8-Pin SOT23 (derate 8.9mW/°C above +70°C) ...........714mW

8-Pin SO (derate 5.9mW/°C above +70°C) .................471mW

8-Pin TDFN (derate 24.4mW/°C above +70°C) ........1951mW

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

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

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

ESD Protection

Human Body Model (IN_+, IN_-) ...................................±13kV

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

PARAMETER

CONDITIONS

UNITS

LVDS INPUTS (IN_+, IN_-)

Differential Input High Threshold

V

TH

Figure 1 -40 0 mV

Differential Input Low Threshold V

TL

Figure 1

-40 mV

Input Current (Noninverting Input)

I

IN+

Figure 1

µA

Power-Off Input Current
(Noninverting Input)

V

IN+

= 0 to 3.6V, V

IN-

= 0 to 3.6V, VCC = 0

or open (Figure 1)

0

µA

Input Current (Inverting Input) I

IN-

Figure 1

µA

Power-Off Input Current
(Inverting Input)

I

IN-OFF

V

IN+

= 0 to 3.6V, V

IN-

= 0 to 3.6V, VCC = 0

or open (Figure 1)

0

µA

LVCMOS/LVTTL OUTPUTS (OUT_)

Open, undriven short, or

2.7 3.2

Output High Voltage V

OH

VID = 0V 2.7 3.2

V

Output Low Voltage V

OL

IOL = 4.0mA, VID = -100mV 0.1 0.4 V

Output Short-Circuit Current I

OS

V

OUT_

= 0 (Note 3) -45 -77

mA

POWER SUPPLY

MAX9171 3.6 6

Supply Current I

CC

MAX9172 7.0 9

mA

SYMBOL

MIN TYP MAX

-100

+0.5 -2.1 -5.0

I

IN+OFF

IOH = -4.0mA

Inputs open

undriven parallel termination

-0.5

-0.5 +4.4 +10.0

-0.5

+0.5

+0.5

-120

MAX9171/MAX9172

Single/Dual LVDS Line Receivers with

“In-Path” Fail-Safe

_______________________________________________________________________________________ 3

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

except V

TH

, VTL, and VID.

Note 2: All devices are 100% production tested at TA= +25°C and are guaranteed by design for TA= -40°C to +85°C, as specified.
Note 3: Short only one output at a time. Do not exceed the absolute maximum junction temperature specification.
Note 4: AC parameters are guaranteed by design and not production tested.
Note 5: C

L

includes scope probe and test jig capacitance.

Note 6: Pulse generator output conditions: t

R

= tF< 1ns (0% to 100%), frequency = 250MHz, 50% duty cycle, VOH= 1.3V, VOL= 1.1V.

Note 7: t

SKD1

is the magnitude of the difference of differential propagation delays in a channel. t

SKD1

= |t

PHLD

- t

PLHD

|.

Note 8: t

SKD2

is the magnitude of the difference of the t

PLHD

or t

PHLD

of one channel and the t

PLHD

or t

PHLD

of the other channel on

the same part.

Note 9: t

SKD3

is the magnitude of the difference of any differential propagation delays between parts at the same VCCand within

5°C of each other.

Note 10: t

SKD4

is the magnitude of the difference of any differential propagation delays between parts operating over the rated

supply and temperature ranges.

SWITCHING CHARACTERISTICS

(VCC= 3.0V to 3.6V, CL= 15pF, |VID| = 0.2V, VCM= 1.2V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC=

3.3V, T

A

= +25°C.) (Notes 4, 5, 6)

PARAMETER

CONDITIONS

UNITS

Differential Propagation Delay
High to Low

t

PHLD

Figures 2, 3 1.0

2.5 ns

Differential Propagation Delay
Low to High

t

PLHD

Figures 2, 3 1.0

2.5 ns

Differential Pulse Skew
|t

PHLD

- t

PLHD

|

t

SKD1

Figures 2, 3 (Note 7) 30 400 ps

Differential Channel-to-Channel
Skew (MAX9172)

t

SKD2

Figures 2, 3 (Note 8) 40 500 ps

t

SKD3

Figures 2, 3 (Note 9) 1

Differential Part-to-Part Skew

t

SKD4

Figures 2, 3 (Note 10) 1.5

ns

Rise Time t

TLH

Figures 2, 3

0.8 ns

Fall Time t

THL

Figures 2, 3

0.8 ns

Maximum Operating Frequency f

MAX

All channels switching, V

OL(MAX)

= 0.4V,

V

OH(MIN)

= 2.7V, 40% < duty cycle < 60%

MHz

SYMBOL

MIN TYP MAX

1.65

1.62

0.55

0.51

250 300

MAX9171/MAX9172

Single/Dual LVDS Line Receivers with
“In-Path” Fail-Safe

4 _______________________________________________________________________________________

Typical Operating Characteristics

(VCC= 3.3V, VCM= 1.2V, |VID| = 0.2V, fIN= 200MHz, CL= 15pF, TA= +25°C, unless otherwise specified.)

OUTPUT HIGH VOLTAGE

vs. SUPPLY VOLTAGE

MAX9171 toc01

SUPPLY VOLTAGE (V)

OUTPUT HIGH VOLTAGE (V)

3.53.43.33.23.1

3.0

3.1

3.2

3.3

3.4

3.5

3.6

2.9

3.0 3.6

IOH = -4mA

OUTPUT LOW VOLTAGE

vs. SUPPLY VOLTAGE

MAX9171 toc02

SUPPLY VOLTAGE (V)

OUTPUT LOW VOLTAGE (mV)

3.53.43.33.23.1

85

90

95

100

80

3.0 3.6

IOL = +4mA

OUTPUT SHORT-CIRCUIT CURRENT

vs. SUPPLY VOLTAGE

MAX9171 toc03

SUPPLY VOLTAGE (V)

OUTPUT SHORT-CIRCUIT CURRENT (mA)

3.53.43.33.23.1

-80

-75

-70

-65

-85

3.0 3.6

VID = +200mV, OUTPUT
SHORTED TO GROUND

DIFFERENTIAL THRESHOLD VOLTAGE

vs. SUPPLY VOLTAGE

MAX9171 toc04

SUPPLY VOLTAGE (V)

DIFFERENTIAL THRESHOLD VOLTAGE (mV)

3.53.43.33.23.1

-50

-45

-40

-35

-55

3.0 3.6

HIGH-LOW

LOW-HIGH

MAX9172 SUPPLY CURRENT

vs. FREQUENCY

MAX9171 toc05

FREQUENCY (MHz)

SUPPLY CURRENT (mA)

100101

10

20

30

40

0

0.1 1000

BOTH CHANNELS

SWITCHING

ONE CHANNEL

SWITCHING

MAX9172 SUPPLY CURRENT

vs. TEMPERATURE

MAX9171 toc06

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

603510-15

7

8

9

6

-40 85

f = 1MHz
BOTH CHANNELS SWITCHING

DIFFERENTIAL PROPAGATION DELAY

vs. SUPPLY VOLTAGE

MAX9171 toc07

SUPPLY VOLTAGE (V)

DIFFERENTIAL PROPAGATION DELAY (ns)

3.53.43.33.23.1

1.5

2.0

2.5

1.0

3.0 3.6

t

PHLD

t

PLHD

DIFFERENTIAL PROPAGATION DELAY

vs. TEMPERATURE

MAX9171 toc08

TEMPERATURE (°C)

DIFFERENTIAL PROPAGATION DELAY (ns)

603510-15

1.6

1.7

1.8

1.9

2.0

1.5

-40 85

t

PHLD

t

PLHD