MAXIM MAX3040, MAX3045 User Manual

General Description

The MAX3040–MAX3045 is a family of 5V quad RS­485/RS-422 transmitters designed for digital data trans­mission over twisted-pair balanced lines. All transmitter
outputs are protected to ±10kV using the Human Body
Model. In addition the MAX3040–MAX3045 withstand
±4kV per IEC 1000-4-4 Electrical Fast Transient/Burst
Stressing. The MAX3040/MAX3043 (250kbps) and the
MAX3041/MAX3044 (2.5Mbps) are slew-rate limited
transmitters that minimize EMI and reduce reflections
caused by improperly terminated cables, thus allowing
error-free transmission.

The MAX3040–MAX3045 feature a hot-swap capability
that eliminates false transitions on the data cable during
power-up or hot insertion. The MAX3042B/MAX3045B
are optimized for data transfer rates up to 20Mbps, the
MAX3041/MAX3044 for data rates up to 2.5Mbps, and
the MAX3040/MAX3043 for data rates up to 250kbps.
The MAX3040–MAX3045 offer optimum performance
when used with the MAX3093E or MAX3095 5V quad
differential line receivers or MAX3094E/MAX3096 3V
quad differential line receivers.

The MAX3040–MAX3045 are ESD-protected pin-compat­ible, low-power upgrades to the industry-standard
‘SN75174 and ‘DS26LS31C. They are available in space­saving TSSOP, narrow SO, and wide SO packages.

Applications

Telecommunications Equipment

Industrial Motor Control

Transmitter for ESD-Sensitive Applications

Hand-Held Equipment

Industrial PLCs

Networking

Features

♦ ESD Protection: ±10kV—Human Body Model

♦ Single +5V Operation

♦ Guaranteed Device-to-Device Skew

(MAX3040/MAX3041/MAX3043/MAX3044)

♦ Pin-Compatible with ‘SN75174, ‘26LS31C and

LTC487

♦ Hot-Swappable for Telecom Applications

♦ Up to 20Mbps Data Rate (MAX3042B/MAX3045B)

♦ Slew-Rate Limited (Data Rates at 2.5Mbps and

250kbps)

♦ 2nA Low-Power Shutdown Mode

♦ 1mA Operating Supply Current

♦ ±4kV EFT Fast Transient Burst Immunity per IEC

1000-4-4

♦ Level 2 Surge Immunity per IEC 1000-4-5,

Unshielded Cable Model

♦ Ultra-Small 16-Pin TSSOP, 16-Pin Narrow SO, and

Wide 16-Pin SO

MAX3040–MAX3045

±10kV ESD-Protected, Quad 5V RS-485/RS-422

Transmitters

________________________________________________________________ Maxim Integrated Products 1

Pin Configurations

Selector Guide

Ordering Information

19-2143; Rev 1; 12/01

Ordering Information continued at end of data sheet.

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.

PART

TEMP RANGE

PIN-PACKAGE

DATA

RATE

MAX3040CUE

16 TSSOP

250kbps

MAX3040CSE

16 Narrow SO

250kbps

MAX3040CWE

16 Wide SO

250kbps

MAX3040EUE

16 TSSOP

250kbps

MAX3040ESE

16 Narrow SO

250kbps

MAX3040EWE

16 Wide SO

250kbps

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

T1IN V

CC

T4IN

Y4

Z4

EN34

Z3

Y3

T3IN

TOP VIEW

MAX3040
MAX3041

MAX3042B

16 TSSOP/SO

Y1

Z1

Y2

EN12

Z2

T2IN

GND

PART

DATA RATE

(bps)

INDUSTRY STANDARD
PINOUT

MAX3040 250k 75174, 34C87, LTC487

MAX3041 2.5M 75174, 34C87, LTC487

MAX3042B 20M 75174, 34C87, LTC487

MAX3043 250k 26LS31

MAX3044 2.5M 26LS31

MAX3045B 20M 26LS31

Pin Configurations continued at end of data sheet.

0°C to +70°C

0°C to +70°C

0°C to +70°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

MAX3040–MAX3045

±10kV ESD-Protected, Quad 5V RS-485/RS-422
Transmitters

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +5V ±5%, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.) (Note 1)

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.

All voltages referenced to ground (GND).
Supply Voltage (V

CC

).............................................................+7V

Control Input Voltage (EN,

EN, EN_) .........-0.3V to (VCC+ 0.3V)

Driver Input Voltage (T_IN).........................-0.3V to (V

CC

+ 0.3V)

Driver Output Voltage (Y_, Z_)

(Driver Disabled) .............................................-7.5V to +12.5V

Driver Output Voltage (Y_, Z_)

(Driver Enabled) .................................................-7.5V to +10V

Continuous Power Dissipation (T

A

= +70°C)

16-Pin TSSOP (derate 9.4mW/°C above +70°C) ..........755mW

16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ..696mW

16-Pin Wide SO (derate 9.52mW/°C above +70°C) .....762mW

Operating Temperature Range

MAX304_C_E .......................................................0°C to +70°C

MAX304_E_E ....................................................-40°C to +85°C

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

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

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

PARAMETER

CONDITIONS

UNITS

DRIVER

Figure 1, R = 50Ω 2.0

Driver Differential Output V

OD

Figure 1, R = 27Ω 1.5

V

Change in Magnitude of
Differential Output Voltage

∆V

OD

Figure 1, R = 50Ω or 27Ω (Note 2) 0.2 V

Driver Common-Mode Output
Voltage

V

OC

Figure 1, R = 50Ω or 27Ω

3V

Change In Magnitude of
Common-Mode Voltage

∆V

OC

Figure 1, R = 50Ω or 27Ω (Note 2) 0.2 V

Input High Voltage V

IH

T_IN, EN_, EN, EN 2.0 V

Input Low Voltage V

IL

T_IN, EN_, EN, EN 0.8 V

Hot-Swap Driver Input Current

I

HOT

SWAP

EN_, EN, EN (Note 3)

µA

Driver Input Current I

IN

T_IN, EN_, EN, EN ±1µA

Driver Short-Circuit Output
Current

I

SC

-7V

<

V

OUT

<

+10V (Note 4)

mA

MAX3040/MAX3041/MAX3042B
EN_ = GND

Output Leakage (Y_, Z_)
when Disabled

MAX3043/MAX3044/MAX3045B
EN = GND, EN = V

CC

±1µA

ESD Protection (Y_, Z_) Human Body Model

kV

Electrical Fast Transient/Burst
Immunity

IEC 1000-4-4 ±4kV

SUPPLY CURRENT

Supply Current I

CC

No load 1 2 mA

MAX3040/MAX3041/MAX3042B
EN_ = GND, T

A

= +25°C

Supply Current in Shutdown
Mode

I

SHDN

MAX3043/MAX3044/MAX3045B
EN = GND, EN = V

CC

, TA = +25°C

10 µA

SYMBOL

MIN TYP MAX

V

/ 2

CC

±25 ±250

±10

0.002

±200

MAX3040–MAX3045

±10kV ESD-Protected, Quad 5V RS-485/RS-422

Transmitters

_______________________________________________________________________________________ 3

SWITCHING CHARACTERISTICS—MAX3040/MAX3043

(VCC= +5V ±5%, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Maximum Data Rate f

MAX

250

kbps

t

PLH

0.7 1.5

Driver Propagation Delay

t

PHL

Figures 2 and 3,
R

DIFF

= 54Ω, C

DIFF

= 50pF

0.7 1.5

µs

t

F

0.48

0.75

1.33

Driver Differential Output
Rise-Time/Fall-Time

t

R

Figures 2 and 3,
R

DIFF

= 54Ω, C

DIFF

= 50pF

0.48

0.75

1.33

µs

t

DSKEW

Different chips

±350

Skew Driver to Driver

t

SSKEW

Same chip

Figures 2 and 3,
R

DIFF

= 54Ω,

C

DIFF

= 50pF

±100

ns

Driver Differential Output Skew
| t

PLH

- t

PHL

|

t

SKEW

Figures 2 and 3,
R

DIFF

= 54Ω, C

DIFF

= 50pF

±100

ns

Driver Enable to Output High t

ZH

MAX3040, Figures 4 and 5, S2 closed,
R

L

= 500Ω , CL= 100pF

2.0 µs

Driver Enable from Shutdown to
Output High

t

ZH(SHDN)

Figures 4 and 5, S2 closed,
R

L

= 500Ω , CL = 100pF

2.0 µs

Driver Enable to Output Low t

ZL

MAX3040, Figures 4 and 5, S1 closed,
R

L

= 500Ω , CL = 100pF

2.0 µs

Driver Enable from Shutdown to
Output Low

t

ZL(SHDN)

Figures 4 and 5, S1 closed,
R

L

= 500Ω , CL = 100pF

2.0 µs

Driver Disable Time from Low t

LZ

Figures 4 and 5, S1 closed,
R

L

= 500Ω , CL = 15pF

500

ns

Driver Disable Time from High t

HZ

Figures 4 and 5, S2 closed,
R

L

= 500Ω, CL = 15pF

500

ns

SWITCHING CHARACTERISTICS—MAX3041/MAX3044

(VCC= +5V ±5%, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Maximum Data Rate f

MAX

2.5

Mbps

t

PLH

70

150

Driver Propagation Delay

t

PHL

Figures 2 and 3,
R

DIFF

= 54Ω, C

DIFF

= 50pF

70

150

ns

t

F

33 70

133

Driver Differential Output
Rise-Time/Fall-Time

t

R

Figures 2 and 3,
R

DIFF

= 54Ω, C

DIFF

= 50pF

33 70

133

ns

t

DSKEW

Different chips

±52

Skew Driver to Driver

t

SSKEW

Same chip

Figures 2 and 3,
R

DIFF

= 54Ω,

C

DIFF

= 50pF

±15

ns

Driver Differential Output Skew
| t

PLH

- t

PHL

|

t

SKEW

Figures 2 and 3,
R

DIFF

= 54Ω, C

DIFF

= 50pF

±15

ns

Driver Enable to Output High t

ZH

MAX3041, Figures 4 and 5, S2 closed,
R

L

= 500Ω, CL = 100pF

400

ns

MAX3040–MAX3045

±10kV ESD-Protected, Quad 5V RS-485/RS-422
Transmitters

4 _______________________________________________________________________________________

Note 1: All currents into the device are positive; all currents out of the device are negative. All voltages are referenced to device

ground unless otherwise noted.

Note 2: ∆V

OD

and ∆VOCare the changes in VODand VOC, respectively, when the transmitter input changes state.

Note 3: This input current level is for the hot-swap enable (EN_, EN, EN) inputs and is present until the first transition only. After the

first transition the input reverts to a standard high-impedance CMOS input with input current I

IN

. For the first 20µs the input

current may be as high as 1mA. During this period the input is disabled.

Note 4: Maximum current level applies to peak current just prior to foldback-current limiting. Minimum current level applies during

current limiting.

SWITCHING CHARACTERISTICS—MAX3041/MAX3044 (continued)

(VCC= +5V ±5%, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)

SWITCHING CHARACTERISTICS—MAX3042B/MAX3045B

(VCC= +5V ±5%, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Maximum Data Rate f

MAX

20

Mbps

t

PLH

23 40

Driver Propagation Delay

t

PHL

Figures 2 and 3,
R

DIFF

= 54Ω, C

DIFF

= 50pF

23 40

ns

t

F

17

Driver Differential Output
Rise-Time/Fall-Time

t

R

Figures 2 and 3,
R

DIFF

= 54Ω, C

DIFF

= 50pF

17

ns

t

DSKEW

Different chips ±8

Skew Driver to Driver

t

SSKEW

Same chip

Figures 2 and 3,

R

DIFF

= 54Ω ,

C

DIFF

= 50pF

±8

ns

Differential Driver Output Skew
| t

PLH

- t

PHL

|

t

SKEW

Figures 2 and 3,
R

DIFF

= 54Ω, C

DIFF

= 50pF

±8ns

Driver Enable to Output High t

ZH

MAX3042B, Figures 4 and 5, S2 closed,
R

L

= 500Ω, CL = 100pF

300

ns

Driver Enable from Shutdown to
Output High

t

ZH(SHDN)

Figures 4 and 5, S2 closed,
R

L

= 500Ω, CL = 100pF

300

ns

Driver Enable to Output Low t

ZL

MAX3042B, Figures 4 and 5, S1 closed,
R

L

= 500Ω, CL = 100pF

300

ns

Driver Enable from Shutdown to
Output Low

t

ZL(SHDN)

Figures 4 and 5, S1 closed,
R

L

= 500Ω, CL = 100pF

300

ns

Driver Disable Time from Low t

LZ

Figures 4 and 5, S1 closed,
R

L

= 500Ω, CL = 15pF

400

ns

Driver Disable Time from High t

HZ

Figures 4 and 5, S2 closed,
R

L

= 500Ω, CL = 15pF

400

ns

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Driver Enable from Shutdown to
Output High

t

ZH(SHDN)

Figures 4 and 5, S2 closed,
R

L

= 500Ω, CL = 100pF

400

ns

Driver Enable to Output Low t

ZL

MAX3041, Figures 4 and 5, S1 closed,
R

L

= 500Ω, CL = 100pF

400

ns

Driver Enable from Shutdown to
Output Low

t

ZL(SHDN)

Figures 4 and 5, S1 closed,
R

L

= 500Ω, CL = 100pF

400

ns

Driver Disable Time from Low t

LZ

Figures 4 and 5, S1 closed,
R

L

= 500Ω, CL = 15pF

500

ns

Driver Disable Time from High t

HZ

Figures 4 and 5, S2 closed,
R

L

= 500Ω, CL = 15pF

500

ns

MAX3040 toc06

OUTPUT LOW VOLTAGE (V)

OUTPUT CURRENT (mA)

54-6 -5 -4 -2 -1 0 1 2-3 3

10

20

30

40

50

60

70

80

0

-7 6

OUTPUT CURRENT vs. TRANSMITTER

OUTPUT HIGH VOLTAGE

0.7

0.8

1.0

0.9

1.1

1.2

02010 30 40 50 60 70

SUPPLY CURRENT vs. TEMPERATURE

MAX3040 toc04

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

VCC = 5.25V

VCC = 5V

VCC = 4.75V

NO LOAD
NO SWITCHING

100 1000

0

10

5

15

20

25

35

30

40

45

0.1 1 10

MAX3040/MAX3043

SUPPLY CURRENT vs. DATA RATE

MAX3040 toc01

DATA RATE (kbps)

SUPPLY CURRENT (mA)

NO LOAD
ALL FOUR TRANSMITTERS
SWITCHING

40

0

0.1 1 10 100 1000 10,000

MAX3041/MAX3044

SUPPLY CURRENT vs. DATA RATE

MAX3040 toc02

DATA RATE (kbps)

SUPPLY CURRENT (mA)

10

5

20

15

35

30

25

NO LOAD
ALL FOUR TRANSMITTERS
SWITCHING

MAX3042B/MAX3045B

SUPPLY CURRENT vs. DATA RATE

DATA RATE (kbps)

0.1 100 1000 10,0001 10 100,000

SUPPLY CURRENT (mA)

60

0

10

20

30

50

40

MAX3040 toc03

NO LOAD
ALL FOUR TRANSMITTERS
SWITCHING

0

20

10

40

30

60

50

70

0426810

OUTPUT CURRENT vs. TRANSMITTER

OUTPUT LOW VOLTAGE

MAX3040 toc06

OUTPUT LOW VOLTAGE (V)

OUTPUT CURRENT (mA)

MAX3040–MAX3045

±10kV ESD-Protected, Quad 5V RS-485/RS-422

Transmitters

_______________________________________________________________________________________ 5

Typical Operating Characteristics

(VCC= +5V, TA = +25°C, unless otherwise noted.)

0

20

10

40

30

60

50

70

021345

OUTPUT CURRENT

vs. DIFFERENTIAL OUTPUT VOLTAGE

MAX3040 toc07

DIFFERENTIAL OUTPUT VOLTAGE (V)

OUTPUT CURRENT (mA)

2.10

2.20

2.15

2.35

2.30

2.25

2.50

2.45

2.40

2.55

0203010 40 50 60 70

TRANSMITTER DIFFERENTIAL OUTPUT

VOLTAGE vs. TEMPERATURE

MAX3040 toc08

TEMPERATURE (°C)

DIFFERENTIAL OUTPUT VOLTAGE (V)

R

DIFF

= 54Ω