MAXIM MAX3160, MAX3161, MAX3162 User Manual

General Description

The MAX3160/MAX3161/MAX3162 are programmable
RS-232/RS-485/422 multiprotocol transceivers. The
MAX3160/MAX3161 are pin programmable as a 2TX/2RX
RS-232 interface or a single RS-485/422 transceiver. The
MAX3162 is configured as a 2TX/2RX RS-232 interface
and a single RS-485/422 transceiver simultaneously.

All devices incorporate a proprietary low-dropout trans­mitter output stage and an on-board dual charge pump
to allow RS-232 and RS-485/422 compliant perfor­mance from a +3V to +5.5V supply. The receivers
feature true fail-safe circuitry that guarantees a logic­high receiver output when the receiver inputs are open
or shorted. These devices also feature pin-selectable
transmitter slew rates for both RS-232 and RS-485/422
modes. Slew-rate limiting minimizes EMI and reduces
reflections caused by improperly terminated cables,
allowing error-free data transmission up to 250kbps.
Disabling slew-rate limiting allows these devices to
transmit at data rates up to 10Mbps in RS-485/422
mode and up to 1Mbps in RS-232 mode. The
MAX3160/MAX3161/MAX3162 feature a 1µA shutdown
mode, and short-circuit limiting and thermal shutdown
circuitry to protect against excessive power dissipation.

The MAX3160/MAX3162 offer a flow-through pinout that
facilitates board layout. The MAX3160/MAX3161/
MAX3162 are available in tiny SSOP packages and
operate over the commercial and extended tempera­ture ranges.

________________________Applications

Point-of-Sales Equipment Peripherals

Industrial Controls Networking

RS-232 to RS-485
Interface Converters

Features

♦ Single-Supply Operation from +3V to +5.5V

♦ Pin-Programmable as 2TX/2RX RS-232 or Single

RS-485/422 (MAX3160/MAX3161)

♦ 2TX/2RX RS-232 and Single RS-485/422

(MAX3162)

♦ Pin-Programmable RS-232/RS-485 Transmitter

Slew Rates Reduce EMI

♦ 10Mbps RS-485 and 1Mbps RS-232 Data Rates

♦ Pin-Programmable Half-Duplex or Full-Duplex

RS-485/422 Operation (MAX3160/MAX3161)

♦ RS-485/422 True Fail-Safe Receivers

♦ Transmitters and Receivers Protected Against

Wiring Faults

♦ 1µA Shutdown Supply Current
♦ 1/8-Unit Load Allows up to 256 Transceivers on

the Bus

MAX3160/MAX3161/MAX3162

+3.0V to+5.5V, 1µA, RS-232/RS-485/422

Multiprotocol Transceivers

________________________________________________________________

Maxim Integrated Products

1

19-1722; Rev 2; 12/09

EVALUATION KIT

AVAILABLE

Ordering Information

Typical Operating Circuit

Pin Configurations appear at end of data sheet.
Selector Guide appears at end of data sheet.

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

+

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

PART TEMP RANGE PIN-PACKAGE

MAX3160CAP+ 0°C to +70°C 20 SSOP
MAX3160EAP+ -40°C to +85°C 20 SSOP
MAX3161CAG+ 0°C to +70°C 24 SSOP
MAX3161EAG+ -40°C to +85°C 24 SSOP
MAX3162CAI+ 0°C to +70°C 28 SSOP

MAX3162EAI+ -40°C to +85°C 28 SSOP

+3V TO +5.5V

MAX3100

SPI

μP

13

11

12

10

TX

RTS

RX

CTS

SHDN

DI/T1IN

DE/T2IN

RO/R2OUT

R1OUT

16

15

8

7

1

V

CC

RS485/RS232

MAX3160

GND FAST HDPLX SHDN

4

12

11

5

13

14

910

Z(B)/T1OUT

Y(A)/T2OUT

6

A/R2IN

B/R1IN

DB9

RJ45

MAX3160/MAX3161/MAX3162

+3.0V to+5.5V, 1µA, RS-232/RS-485/422
Multiprotocol Transceivers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V
±10%; T

A

= T

MIN

to T

MAX

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

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.

Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.

VCCto GND..............................................................-0.3V to +6V

V+ to GND ................................................................-0.3V to +7V

V- to GND....................................................................0.3V to -7V

V+ - V- (Note 1)....................................................................+13V

Input Voltages

T1IN, T2IN, DI, DE485, RE485, TE232, RE232, SHDN,

FAST, HDPLX, RS485/RS232 to GND. ...............-0.3V to +6V

A, B, R1IN, R2IN to GND ...............................................±25V

Output Voltages

T1OUT, T2OUT, Y, Z to GND......................................±13.2V

R2OUT, R1OUT, RO to GND................-0.3V to (V

CC

+ 0.3V)

Output Short-Circuit Duration

T1OUT, T2OUT, Y, Z ............................................Continuous

Continuous Power Dissipation (T

A

= +70°C)

20-Pin SSOP (derate 11.9W/°C above +70°C) ..........952mW

24-Pin SSOP (derate 14.9W/°C above +70°C) ........1195mW

28-Pin SSOP (derate 15W/°C above +70°C) ...........1201mW

Operating Temperature Ranges

MAX316_CA_....................................................0°C to +70°C

MAX316_EA_ .................................................-40°C to +85°C

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

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

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

DC CHARACTERISTICS

VCC Standby Current I

VCC Shutdown Current I

TRANSMITTER AND LOGIC INPUTS (DI, T1IN, T2IN, DE485, RRRREEEE444488885555, TE232, RRRREEEE222233332222, FAST, HDPLX, SHDN, RS485/RRRRSSSS222233332222)

Logic Input Low V

Logic Input High V

Logic Input Leakage Current I

Transmitter Logic Hysteresis V

RS-232 AND RS-485/422 RECEIVER OUTPUTS (R1OUT, R2OUT, RO)

Receiver Output Voltage Low V

Receiver Output Voltage High V

Receiver Output Short Circuit
Current

Receiver Output Leakage
Current

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MAX3160/MAX3161, no load,
RS485/ RS232 = GND

CC

CC

INL

HYS

I

OSR

I

OZR

OL

OH

MAX3160/MAX3161, no load,
RS485/ RS232 = V

MAX3162 No Load 3.0 6

SHDN = GND, receiver inputs open or
grounded

IL

VCC = +3.3V 2.0

IH

VCC = +5V 2.4

I

= 2.5mA 0.4 V

OUT

I

= -1.5mA V

OUT

0 < VO < V

Receivers disabled ±0.05 ±1µA

CC

CC

1.2 2.5

2.5 5.5

110µA

0.8 V

±0.01 ±1µA

0.5 V

- 0.6 V

CC

±20 ±60 mA

mA

V

MAX3160/MAX3161/MAX3162

+3.0V to+5.5V, 1µA, RS-232/RS-485/422

Multiprotocol Transceivers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V
±10%; T

A

= T

MIN

to T

MAX

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

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RS-232 RECEIVER INPUTS (R1IN, R2IN)

Input Voltage Range -25 25 V

Input Threshold Low

Input Threshold High

Input Hysteresis 0.5 V

Input Resistance 357kΩ

RS-485/422 RECEIVER INPUTS (NOTE 2)

Input Resistance R

Input Current I

Input Differential Threshold V

Input Hysteresis ΔV

RS-232 TRANSMITTER OUTPUTS (T1OUT, T2OUT)

Output Voltage Swing

Output Resistance V

Output Short-Circuit Current T_OUT = GND ±30 ±60 mA

Output Leakage Current

RS-485/422 TRANSMITTER OUTPUTS (Y, Z)

Differential Output Voltage V

Change in Magnitude of
Differential Output Voltage for
Complementary Output States

Common Mode Output Voltage V

Change in Magnitude of
Common Mode Output Voltage
for Complementary Output
States

VCC = +3.3V 0.6

V

= +5V 0.8

CC

V

=+3.3V 2.0

CC

V

= +5V 2.4

CC

-7V < VCM < +12V

IN

MAX3160

IN

MAX3161/MAX3162

TH

TH

Both transmitter outputs loaded with 3kΩ
to GND

= V + = V - = 0V , V

ΔV

Δ V

OD

OD

OC

C C

V

= ±12V

OUT

TE232 = GND or SHDN =
GND

Figure 1

R = 27Ω or 50Ω, Figure 1 -0.2 0.2 V

R = 27Ω or 50Ω, Figure 1 3 V

R = 27Ω or 50Ω, Figure 1 0.2 V

OC

T 1OU T

MAX3160 48

MAX3161/
MAX3162

VCM = +12V 0.25

= -7V -0.15

V

CM

VCM = +12V 0.125

= -7V -0.075

V

CM

= V

= + 2V 300 10M Ω

T 2OU T

MAX3160/
MAX3161

MAX3162 ±25

R = 27Ω
(RS-485)

R = 50Ω
(RS-422)

96

-200 -50 mV

30 mV

±5 ±5.4 V

1.5

2

±125

V

V

kΩ

mA

µA

V

MAX3160/MAX3161/MAX3162

+3.0V to+5.5V, 1µA, RS-232/RS-485/422
Multiprotocol Transceivers

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V
±10%; T

A

= T

MIN

to T

MAX

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

Output Short-Circuit Current I

Output Leakage Current

RS-232 TIMING CHARACTERISTICS (FAST = GND, 250kbps, ONE TRANSMITTER SWITCHING)

Maximum Data Rate RL = 3kΩ, CL = 1000pF 250 kbps

Receiver Propagation Delay R_IN to R_OUT, CL = 150pF 0.15 µs

Receiver Output Enable Time 200 ns

Receiver Output Disable Time 200 ns

Transmitter Skew |t

Receiver Skew |t

Transition-Region Slew Rate

RS-232 TIMING CHARACTERISTICS (FAST = VCC, 1Mbps, ONE TRANSMITTER SWITCHING)

Maximum Data Rate

Receiver Propagation Delay R_IN to R_OUT, CL = 150pF 0.15 µs

Receiver Output Enable Time 200 ns

Receiver Output Disable Time 200 ns

Transmitter Skew |t

Receiver Skew |t

Transition-Region Slew Rate

RS-485/422 TIMING CHARACTERISTICS (FAST = GND) 250kbps

Driver Propagation Delay

Driver Rise and Fall Time

Driver Propagation Delay Skew t

Driver Output Enable Time t

Driver Output Disable Time t

Receiver Propagation Delay

Receiver Propagation Delay
Skew

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SC

I

O

VY or VZ = +12V to –7V ±250 mA

VY or VZ = +12V,
DE485 = GND or SHDN =
GND

- t

PHL

PLH

V

CC

=3kΩ to 7kΩ, measured

R

L

| 100 ns

PLH

- t

|50ns

PHL

= +3.3V, TA = +25°C,

from +3.0V or –3.0V to
+3.0V

MAX3160/
MAX3161

±125

MAX3162 ±25

CL = 150pF
to 1000pF

= 150pF

C

L

to 2500pF

630

430

VCC = +3V to +4.5V, RL = 3kΩ, CL = 250pF 1

= +4.5V to +5.5V, RL = 3kΩ,

V

CC

= 1000pF

C

L

- t

PHL

PLH

V

CC

= 150pF to 1000pF, measured from

C

L

|25ns

PLH

- t

|50ns

PHL

= +3.3V, TA = +25°C, RL =3kΩ to 7kΩ,

1

24 150 V/μs

+3.0V or –3.0V to +3.0V

t

,

DPHL

t

DPLH

t

DPHL

t

DPLH

DSKEW

DZH

DLZ

t

RPLH,

t

RPHL

t

RSKEW

, t

, t

R

= 54Ω, CL = 50pF, Figures 3, 5 200 400 800 ns

DIFF

,

R

= 54Ω, CL = 50pF, Figures 3, 5 200 400 800 ns

DIFF

R

= 54Ω, CL = 50pF, Figure 3, 5 200 ns

DIFF

RZLRDIFF

DHZRDIFF

= 54Ω, CL = 50pF, Figures 4, 6 400 800 ns

= 54Ω, CL = 50pF, Figure 4, 6 200 400 ns

CL = 15pF, Figures 7, 9 25 80 150 ns

CL = 50pF, Figures 7, 9 10 ns

µA

V/µs

Mbps

MAX3160/MAX3161/MAX3162

+3.0V to+5.5V, 1µA, RS-232/RS-485/422

Multiprotocol Transceivers

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V
±10%; T

A

= T

MIN

to T

MAX

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

Typical Operating Characteristics

(VCC= +3.3V, 250kbps data rate, 0.1µF capacitors, all RS-232 transmitters (RS-232 mode) loaded with 3kΩ to ground, TA= +25°C,
unless otherwise noted.)

-10.0

-7.5

-5.0

-2.5

0

2.5

5.0

7.5

10.0

0 1000 2000 3000 4000 5000

RS-232 TRANSMITTER OUTPUT VOLTAGE vs.

LOAD CAPACITANCE (FAST = GND)

MAX3160/2 TOC1

LOAD CAPACITANCE (pF)

TRANSMITTER OUTPUT VOLTAGE (V)

-10.0

-7.5

-5.0

-2.5

0

2.5

5.0

7.5

10.0

0 500 1000 1500 2000

RS-232 TRANSMITTER OUTPUT VOLTAGE

vs. LOAD CAPACITANCE (FAST =

VCC)

MAX3160/2 TOC2

LOAD CAPACITANCE (pF)

TRANSMITTER OUTPUT VOLTAGE (V)

0

4

2

10

8

6

16

14

12

18

0 20001000 3000 4000 5000

RS-232 TRANSMITTER SLEW RATE vs.

LOAD CAPACITANCE (FAST = GND)

MAX3160/2 TOC3

LOAD CAPACITANCE (pF)

SLEW RATE (V/μs)

Note 2: Applies to A, B for MAX3162 and MAX3160/MAX3161 with HDPLX = GND, or Y, Z for MAX3160/MAX3161 with HDPLX = V

CC.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Receiver Output Enable Time t

Receiver Output Disable Time t

RZL

RLZ

, t

RZHCL

, t

RHZCL

= 50pF, Figures 2, 8 100 ns

= 50pF, Figures 2, 8 100 ns

RS-485/RS-422 TIMING CHARACTERISTICS (FAST = VCC, 10Mbps)

t

Driver Propagation Delay

Driver Rise And Fall Times tDR, t

Driver Propagation Delay Skew t

Driver Output Enable Time

Driver Output Disable Time t

Receiver Propagation Delay

Receiver Propagation Delay
Skew
Receiver Output Enable Time t

Receiver Output Disable Time t

DPHL,

t

DPLH

DSKEW

t

DLZ

t

RPLH

t

RPHL

t

RSKEW

RZL

RLZ

DZL

, t

, t
, t

R

= 54Ω, CL = 50pF, Figures 3, 5 60 120 ns

DIFF

DFRDIFF

DHZRDIFF

,

= 54Ω, CL = 50pF, Figures 3, 5 10 25 ns

R

= 54Ω, CL = 50pF, Figures 3, 5 10 ns

DIFF

R

= 54Ω, CL = 50pF, Figures 4, 6 400 800 ns

DIFF

= 54Ω, CL = 50pF, Figures 4, 6 200 400 ns

CL = 15pF, Figures 7, 9 80 150 ns

CL = 50pF, Figures 7, 9 10 ns

RZHCL

RHZ

= 50pF, Figures 2, 8 100 ns

CL = 15pF, Figures 2, 8 100 ns

MAX3160/MAX3161/MAX3162

+3.0V to+5.5V, 1µA, RS-232/RS-485/422
Multiprotocol Transceivers

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= +3.3V, 250kbps data rate, 0.1µF capacitors, all RS-232 transmitters (RS-232 mode) loaded with 3kΩ to ground, TA= +25°C,
unless otherwise noted.)

0

30

20

10

40

50

60

70

80

90

100

0 500 1000 1500 2000

RS-232 TRANSMITTER SLEW RATE

vs. LOAD CAPACITANCE (FAST = V

CC

)

MAX3160/2 TOC4

LOAD CAPACITANCE (pF)

SLEW RATE (V/μs)

0

20

10

40

30

50

60

0 20001000 3000 4000 5000

OPERATING SUPPLY CURRENT vs.

LOAD CAPACITANCE WHEN

TRANSMITTING DATA (RS-232 MODE)

MAX3160/2 TOC5

LOAD CAPACITANCE (pF)

SUPPLY CURRENT (mA)

1Mbps

250kbps

20kbps

0

1.0

2.0

1.5

2.5

3.0

-40 10-15 35 60 85

MAX3160/MAX3161

NO-LOAD SUPPLY CURRENT vs.

TEMPERATURE

MAX3160/2 TOC6

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

RS-485 MODE

RS-232 MODE

SHUTDOWN CURRENT vs. TEMPERATURE

160

140

120

100

80

60

SHUTDOWN CURRENT (nA)

40

20

0

-40 -15 10 35 60 85
TEMPERATURE (°C)

140

120

MAX3160/2 TOC7

100

80

60

OUTPUT CURRENT (mA)

40

20

RS-485/422 DRIVER OUTPUT CURRENT vs.

DIFFERENTIAL OUTPUT VOLTAGE

100

10

1

0.1

OUTPUT CURRENT (mA)

0.01

0.001
0 1.0 1.50.5 2.0 2.5 3.0 3.5 4.0

OUTPUT VOLTAGE (V)

3.5

3.4

3.3

MAX3160/2 TOC10

3.2

3.1

3.0

2.9

OUTPUT VOLTAGE (V)

2.8

2.7

2.6

2.5

DRIVER OUTPUT VOLTAGE

0

0462 8 10 12

OUTPUT LOW VOLTAGE (V)

RS-485/422 DRIVER DIFFERENTIAL OUTPUT

vs. TEMPERATURE

R = 50Ω

-40 10-15 35 60 85
TEMPERATURE (°C)

RS-485/422 OUTPUT CURRENT vs.

180

160

MAX3160/2 TOC8

140

120

100

OUTPUT CURRENT (mA)

MAX3160/2 TOC11

OUTPUT CURRENT (mA)

RS-485/422 OUTPUT CURRENT vs.

DRIVER OUTPUT HIGH VOLTAGE

80

60

40

20

0

-7 -3-5 -1 1 3 5
OUTPUT HIGH VOLTAGE (V)

OUTPUT CURRENT vs. RECEIVER

OUTPUT LOW VOLTAGE

30

25

20

15

10

5

0

0 1.5 2.00.5 1.0 2.5 3.0 3.5

OUTPUT LOW VOLTAGE (V)

MAX3160/2 TOC9

MAX3160/2 TOC12

MAX3160/MAX3161/MAX3162

0

40

20

80

60

100

120

-40 10-15 35 60 85

RS-485/422 RECEIVER PROPAGATION DELAY

vs. TEMPERATURE

MAX3160/2 TOC16

TEMPERATURE (°C)

PROPAGATION DELAY (ns)

CL = 50pF

RISING

FALLING

50

60

55

70

65

80

75

85

-40 10-15 35 60 85

RS-485/422 DRIVER PROPAGATION DELAY

vs.TEMPERATURE (FAST)

MAX3160/2 TOC18

TEMPERATURE (°C)

R = 50

Ω

TIME (ns)

+3.0V to+5.5V, 1µA, RS-232/RS-485/422

Multiprotocol Transceivers

_______________________________________________________________________________________

7

Typical Operating Characteristics (continued)

(VCC= +3.3V, 250kbps data rate, 0.1µF capacitors, all RS-232 transmitters (RS-232 mode) loaded with 3kΩ to ground, TA= +25°C,
unless otherwise noted.)

-1000

-800

-400

-600

0

200

-200

400

-20 -10 -5-15 0 5 10 15 20

I-V OUTPUT IMPEDANCE CURVE

IN RS-232 SHUTDOWN MODE

MAX3160-A

VOLTS (V)

CURRENT (μA)

OUTPUT CURRENT vs. RECEIVER

14

12

10

8

6

OUTPUT CURRENT (mA)

4

2

0

500

480

460

440

420

400

TIME (ns)

380

360

340

320

300

OUTPUT HIGH VOLTAGE

0 1.0 1.50.5 2.0 2.5 3.0 3.5

OUTPUT HIGH VOLTAGE (V)

RS-485/422 DRIVER PROPAGATION DELAY

vs. TEMPERATURE (SLOW)

R = 50Ω

-40 10-15 35 60 85
TEMPERATURE (°C)

MAX3160/2 TOC13

MAX3160/2 TOC19

RS-485/422

RS-485/422

DRIVER PROPAGATION

(FAST, 10Mbps)

20ns/div

MAX3160/2 TOC20

RECEIVER PROPAGATION

(FAST, 5Mbps)

MAX3160/2 TOC22

DI
5V/div

V

Y-VZ

2V/div

RS-485/422 DRIVER PROPAGATION

(SLOW, 250kbps)

RS-485/422

TO DRIVER OUTPUT

1.0μs/div

DRIVER DISABLE/ENABLE

MAX3160/2 TOC21

MAX3160/2 TOC24

DI
5V/div

VY-V

Z

2V/div

C

L

= 50pF

40ns/div

VY-V
2V/div

RO
2V/div

Z

R = 50Ω

= 82pF

C

L

100ns/div

DE485
2V/div

- V

V

Y

2V/div

Z