MAXIM MXL1543B User Manual

General Description

The MXL1543B is a three-driver/three-receiver multipro­tocol transceiver that operates from a +5V single sup­ply. The MXL1543B, along with the MXL1544/MAX3175
and the MXL1344A, form a complete software-selec­table data terminal equipment (DTE) or data communi­cation equipment (DCE) interface port that supports the
V.28 (RS-232), V.10/V.11 (RS-449/V.36, EIA-530, EIA­530A, X.21), and V.35 protocols. The MXL1543B trans­ceivers carry the high-speed clock and data signals
while the MXL1544/MAX3175 carry the control signals.
The MXL1543B can be terminated by the MXL1344A
software-selectable resistor termination network or by
discrete termination networks.

An internal charge pump and a proprietary low-dropout
transmitter output stage allow V.11- , V.28- , and V.35­compliant operation from a +5V single supply. A no­cable mode is entered when all mode pins (M0, M1,
and M2) are pulled high or left unconnected. In no­cable mode, supply current decreases to 0.5µA and all
transmitter and receiver outputs are disabled (high
impedance). Short-circuit current limiting and thermal
shutdown circuitry protect the drivers against excessive
power dissipation.

Applications

Features

♦ MXL1543B, MXL1544/MAX3175, and MXL1344A

Chipset Is Pin Compatible with LTC1543,
LTC1544, and LTC1344A

♦ Supports RS-232, RS-449, EIA-530, EIA-530A,

V.35, V.36, and X.21

♦ Software-Selectable Cable Termination Using the

MXL1344A

♦ Complete DTE or DCE Port with MXL1544/

MAX3175, and MXL1344A

♦ +5V Single-Supply Operation

♦ 0.5µA No-Cable Mode

♦ TUV-Certified NET1/NET2 and TBR1/TBR2-

Compliant

MXL1543B

+5V Multiprotocol, 3Tx/3Rx, Software-

Selectable Clock/Data Transceivers

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3444; Rev 0; 10/04

PART TEMP RANGE PIN-PACKAGE

MXL1543BCAI 0° to +70°C 28 SSOP

Data Networking

CSU and DSU

Data Routers

PCI Cards

Telecommunications
Equipment

Typical Operating Circuit

D1D2

D3D4

R1

R2R3

MXL1543B

RXD RXC TXDTXC SCTE

D1D2

D3

R1

R2R3

MXL1544
MAX3175

CTS DSR RTSDTRDCD

RXC B

RXD A (104)

RXD B

SG (102)

SHIELD (101)

RTS A (105)

RTS B

DTR A (108)

DTR B

DCD A (107)

DCD B

DSR A (109)

CTS A (106)

DSR B

CTS B

LL A (141)

TXD B

SCTE A (113)

SCTE B

TXC A (114)

TXC B

TXD A (103)

DB-25 CONNECTOR

13

R4

LL

RXC A (115)

18 5 10 8 22 6 23 20 19 4 1 7 16 3 9 17 12 15 11 24 14 2

MXL1344A

Pin Configuration appears 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.

MXL1543B

+5V Multiprotocol, 3Tx/3Rx, Software­Selectable Clock/Data Transceivers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +5.0V, C1 = C2 = C4 = 1µF, C3 = C5 = 4.7µF, (Figure 10), TA = T

MIN

to T

MAX

. Typical values are at TA = +25°C, unless other-

wise noted.)

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 GND Unless Otherwise Noted.
Supply Voltages

V

CC

.......................................................................-0.3V to +6V

V

DD

....................................................................-0.3V to +7.3V

V

EE

.....................................................................+0.3V to -6.5V

V

DD

to V

EE

(Note 1)................................................................13V

Logic Input Voltages

M0, M1, M2, DCE/

DTE, T_IN ................................-0.3V to +6V

Logic Output Voltages

R_OUT....................................................-0.3V to (V

CC

+ 0.3V)

Transmitter Outputs

T_OUT_, T3OUT_/R1IN_.....................................-15V to +15V

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

Receiver Input

R_IN_T3OUT_/R1IN_ ..........................................-15V to +15V

R_IN A to R_IN B..............................-15V to 0V or 0V to +15V

Continuous Power Dissipation (T

A

= +70°C)

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

Operating Temperature Range

MXL1543BCAI .....................................................0°C to 70°C

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

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

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DC CHARACTERISTICS

V

CC

Operating Range V

CC

V

RS-530, RS-530A, X.21, no load 13

RS-530, RS-530A, X.21, full load 100 130

V.35 mode, no load 20

V.35 mode, full load 126 170

V.28 mode, no load 20

V.28 mode, full load 40 75

mA

Supply Current
(DCE Mode)
(Digital Inputs = GND or
V

CC

)

(Transmitter Outputs Static)

I

CC

No-cable mode 0.5 10 µA

RS-530, RS-530A, X.21, full load 230

V.35 mode, full load 600

Internal Power Dissipation
(DCE Mode)

P

D

V.28 mode, full load 140

mW

Any mode (except no-cable mode), no load 6.4 6.8

V.28 mode, with load 6.4 6.8

Positive Charge-Pump
Output Voltage

V

DD

V.28, V.35 modes, with load, IDD = 10mA 6.4 6.8

V

V.28, V.35, no load

V.28 mode, full load

-5.4

V.35 mode, full load

-5.4

Negative Charge-Pump
Output Voltage

V

EE

RS-530, RS-530A, X.21, full load

-5.4

V

Supply Rise Time t

r

No-cable mode or power-up to turn on 500 µs

LOGIC INPUTS (M0, M1, M2, DCE/DTE, T1IN, T2IN, T3IN)

Input High Voltage V

IH

2.0

Input Low Voltage V

IL

0.8

V

T1IN, T2IN, T3IN ±10
M0, M1, M2, DCE/DTE = GND

-50 -30

Logic Input Current I

IN

M0, M1, M2, DCE/DTE = V

CC

±10

µA

Note 1: VDDand VEEabsolute difference cannot exceed 13V.

4.75 5.25

-100

-5.6

-5.6

-5.6

-5.6

MXL1543B

+5V Multiprotocol, 3Tx/3Rx, Software-

Selectable Clock/Data Transceivers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5.0V, C1 = C2 = C4 = 1µF, C3 = C5 = 4.7µF, (Figure 10), TA= T

MIN

to T

MAX

. Typical values are at TA = +25°C, unless oth-

erwise noted.)

PARAMETER

CONDITIONS

UNITS

LOGIC OUTPUTS (R1OUT, R2OUT, R3OUT)

Output High Voltage V

OH

I

SOURCE

= 4mA 3 4.5

Output Low Voltage V

OL

I

SINK

= 4mA 0.3 0.8

V

Output Short-Circuit Current I

SC

0 ≤ V

OUT

≤ V

CC

±50 mA

Output Pullup Current I

L

V

OUT

= 0, no-cable mode 70 µA

V.11 TRANSMITTER

Open-Circuit Differential Output
Voltage

V

ODO

Open circuit, R = 1.95kΩ (Figure 1) ±5V

R = 50Ω (Figure 1), TA = +25oC

0.67

✕

Loaded Differential Output
Voltage

V

ODL

R = 50Ω (Figure 1) ±2

V

Change in Magnitude of Output
Differential Voltage

∆V

OD

R = 50Ω (Figure 1) 0.2 V

Common-Mode Output Voltage V

OC

R = 50Ω (Figure 1) 3.0 V

Change in Magnitude of Output
Common-Mode Voltage

∆V

OC

R = 50Ω (Figure 1) 0.2 V

Short-Circuit Current I

SC

V

OUT

= GND 150 mA

Output Leakage Current I

Z

-0.25V ≤ V

OUT

≤ +0.25V, power-off or

no-cable mode

±1

µA

Rise or Fall Time t

r

,

t

f

(Figures 2, 6) 2 10 25 ns

Transmitter Input to Output
Delay

(Figures 2, 6) 40 80 ns

Data Skew

(Figures 2, 6) 2 12 ns

Output to Output Skew t

SKEW

(Figures 2, 6) 3 ns

V.11 RECEIVER

Differential Threshold Voltage V

TH

-7V ≤ VCM ≤ 7V

200 mV

Input Hysteresis ∆V

TH

-7V ≤ VCM ≤ 7V 15 40 mV

Receiver Input Current I

IN

-10V ≤ V

A, B

≤10V

mA

Receiver Input Resistance R

IN

-10V ≤ V

A, B

≤ 10V 15 30 kΩ

Rise or Fall Time tr, t

f

(Figures 2, 7) 15 ns

Receiver Input to Output Delay

(Figures 2, 7) 50 80 ns

Data Skew

(Figures 2, 7) 2 16 ns

V.35 TRANSMITTER

Open circuit (Figure 3) ±7

Differential Output Voltage V

OD

With load, -4V ≤ VCM ≤ 4V (Figure 3)

V

Output High Current I

OH

V

A,B

= 0 -13 -11 -9 mA

Output Low Current I

OL

V

A,B

= 0 9 11 13 mA

SYMBOL

MIN TYP MAX

0.5

V

✕

ODO

V

ODO

±100

t

t

PHL

PLH

,

It

- t

PHL

I

PLH

-200

±0.66

t

PHL,tPLH

|t

- t

PLH

|

PHL

±0.44 ±0.55 ±0.66

MXL1543B

+5V Multiprotocol, 3Tx/3Rx, Software­Selectable Clock/Data Transceivers

4 _______________________________________________________________________________________

PARAMETER

CONDITIONS

UNITS

Output Leakage Current I

Z

-0.25V ≤ V

OUT

≤ +0.25V, power-off or no-

cable mode

±1

µA

Rise or Fall Time tr, t

f

(Figures 3, 6) 5 ns

Transmitter Input to Output
Delay

,

(Figures 3, 6) 35 80 ns

Data Skew

(Figures 3, 6) 2 16 ns

Output-to-Output Skew t

SKEW

(Figures 3, 6) 4 ns

V.35 RECEIVER

Differential Input Voltage V

TH

-2V ≤ VCM ≤ 2V (Figure 3)

200 mV

Input Hysteresis ∆V

TH

-2V ≤ VCM ≤ 2V (Figure 3) 15 40 mV

Receiver Input Current I

IN

-10V ≤ VA,B ≤ 10V

mA

Receiver Input Resistance R

IN

-10V ≤ VA,B ≤ 10V 15 30 kΩ

Rise or Fall Time tr, t

f

(Figures 3, 7) 15 ns

Receiver Input to Output Delay

(Figures 3, 7) 50 80 ns

Data Skew

(Figures 3, 7) 2 16 ns

V.28 TRANSMITTER

Open circuit ±7

Output Voltage Swing (Figure 4)

V

O

RL = 3kΩ±5 ±6

V

Short-Circuit Current I

SC

mA

Output Leakage Current I

Z

-0.25V ≤ V

OUT

≤ +0.25V, power-off or no-

cable mode

±1

µA

Output Slew Rate SR RL = 3kΩ, CL = 2500pF (Figures 4, 8) 4 30

V/µs

Transmitter Input to Output
Delay

t

PHL

RL = 3kΩ, CL = 2500pF (Figures 4, 8) 1.5 2.5 µs

Transmitter Input to Output
Delay

t

PLH

RL = 3kΩ, CL = 2500pF (Figures 4, 8) 1.5 3 µs

V.28 RECEIVER

Input Threshold Low V

IL

0.8 1.2 V

Input Threshold High V

IH

1.2 2.0 V

Input Hysteresis V

HYST

0.3 V

Input Resistance R

IN

-15V ≤ VIN ≤ +15V 3 5 7 kΩ

Rise or Fall Time tr, t

f

(Figures 5, 9) 15 ns

Receiver Input to Output Delay t

PHL

(Figures 5, 9) 60 100 ns

Receiver Input to Output Delay t

PLH

(Figures 5, 9) 160 250 ns

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5.0V, C1 = C2 = C4 = 1µF, C3 = C5 = 4.7µF, (Figure 10), TA= T

MIN

to T

MAX

. Typical values are at TA = +25°C, unless oth-

erwise noted.)

SYMBOL

t

t

PHL

PLH

|t

PHL–tPLH

|

MIN TYP MAX

±100

-200

t

, t

PHL

PLH

|t

PHL–tPLH

|

0.05

±0.66

±150

±100

MXL1543B

+5V Multiprotocol, 3Tx/3Rx, Software-

Selectable Clock/Data Transceivers

_______________________________________________________________________________________ 5

160

0

0.1 100 1000

V.11 SUPPLY CURRENT

vs. DATA RATE

40

20

60

80

100

120

140

MXL1543B toc01

DATA RATE (kbps)

SUPPLY CURRENT (mA)

10110,000

DCE MODE, R = 50Ω, ALL TRANSMITTERS
OPERATING AT THE SPECIFIED DATA RATE

0

20

60

40

80

100

010050 150 200 250

V.28 SUPPLY CURRENT

vs. DATA RATE

MXL1543B toc02

DATA RATE (kbps)

SUPPLY CURRENT (mA)

DCE MODE ALL TRANSMITTERS
OPERATING AT THE SPECIFIED DATA RATE
R

L

= 3kΩ, CL = 2500pF

160

0

0.1 100 1000

V.35 SUPPLY CURRENT

vs. DATA RATE

40

20

60

80

100

120

140

MXL1543B toc03

DATA RATE (kbps)

SUPPLY CURRENT (mA)

100.1 10,000

DCE MODE, FULL LOAD, ALL TRANSMITTERS
OPERATING AT THE SPECIFIED DATA RATE

180

200

-5

-2

-3

-4

0

-1

4

3

2

1

5

010203040506070

V.11 DRIVER DIFFERENTIAL OUTPUT

VOLTAGE vs. TEMPERATURE

MXL1543B toc04

TEMPERATURE (°C)

DRIVER DIFFERENTIAL OUTPUT VOLTAGE (V)

DCE MODE, R = 50

Ω

V

OUT+

V

OUT-

8

V.28 OUTPUT VOLTAGE

vs. TEMPERATURE

MXL1543B toc05

TEMPERATURE (°C)

OUTPUT VOLTAGE (V)

0304010 20 50 60 70

10

4

6

0

2

-4

-2

-8

-6

-10

DCE MODE, RL = 3k

Ω

V

OUT+

V

OUT-

-0.66

-0.22

-0.44

0.22

0

0.44

0.66

0304010 20 50 60 70

OUTPUT VOLTAGE (V)

V.35 OUTPUT VOLTAGE

vs. TEMPERATURE

MXL1543B toc06

TEMPERATURE (°C)

DCE MODE, VCM = 0
FULL LOAD

V

OL

V

OH

520

540

530

560

550

570

580

590

600

-4 -2 -1-3 01234

V.35 DIFFERENTIAL OUTPUT VOLTAGE

vs. COMMON-MODE VOLTAGE

MXL1543B toc07

COMMON-MODE VOLTAGE (V)

DIFFERENTIAL OUTPUT VOLTAGE (mV)

|VOD|

-300

0

-100

-200

100

200

300

-10 -2-4-8 -6 0246810

V.11/V.35 RECEIVER INPUT CURRENT

vs. INPUT VOLTAGE

MXL1543B toc08

INPUT VOLTAGE (V)

RECEIVER INPUT CURRENT (

µ

A)

DCE MODE

-0.5

1.0

0.5

0

1.5

2.0

2.5

-10 -2-4-8 -6 0246810

V.28 RECEIVER INPUT CURRENT

vs. INPUT VOLTAGE

MXL1543B toc09

INPUT VOLTAGE (V)

RECEIVER INPUT CURRENT (mA)

DCE MODE

-2.0

-2.5

-1.5

-1.0

Typical Operating Characteristics

(VCC= +5.0V, C1 = C2 = C4 =1µF, C3 = C5 = 4.7µF, (Figure 10), TA= T

MIN

to T

MAX

, TA = +25°C, unless otherwise noted.)

MXL1543B

+5V Multiprotocol, 3Tx/3Rx, Software­Selectable Clock/Data Transceivers

6 _______________________________________________________________________________________

200ns/div

V.11 LOOPBACK OPERATION

T

IN

T

OUT/RIN

R

OUT

5V/div

5V/div

5V/div

MXL1543B toc10

R = 50

Ω

1µs/div

V.28 LOOPBACK OPERATION

T

IN

T

OUT/RIN

R

OUT

5V/div

5V/div

5V/div

MXL1543B toc11

CL = 2500pF
RL = 3k

Ω

V.11 TRANSMITTER PROPAGATION DELAY

vs. TEMPERATURE

MXL1543B toc14

0

10

30

20

60

70

50

40

80

PROPAGATION DELAY (ns)

0203010

40

50 60 70

TEMPERATURE (°C)

t

PLH

t

PHL

V.11 RECEIVER PROPAGATION DELAY

vs. TEMPERATURE

MXL1543B toc15

0

10

30

20

60

70

50

40

80

PROPAGATION DELAY (ns)

0203010

40

50 60 70

TEMPERATURE (°C)

t

PLH

t

PHL

V.35 TRANSMITTER PROPAGATION DELAY

vs. TEMPERATURE

MXL1543B toc16

0

10

30

20

60

70

50

40

80

PROPAGATION DELAY (ns)

0203010

40

50 60 70

TEMPERATURE (°C)

t

PLH

t

PHL

V.35 RECEIVER PROPAGATION DELAY

vs. TEMPERATURE

MXL1543B toc17

0

10

30

20

60

70

50

40

80

PROPAGATION DELAY (ns)

0203010

40

50 60 70

TEMPERATURE (°C)

90

100

t

PHL

t

PLH

200ns/div

V.35 LOOPBACK OPERATION

T

IN

T

OUT/RIN

R

OUT

1V/div

5V/div

5V/div

MXL1543B toc12

FULL LOAD

0

4
2

6

8

10

12

14

16

18

20

22

24

0 1000 2000 3000 4000 5000

V.28 SLEW RATE vs. C

LOAD

MXL1543B toc13

C

LOAD

(pF)

SLEW RATE (V/µs)

+SLEW

-SLEW

RL = 3k

Ω

1 TRANSMITTER SWITCHING AT 250kbps.
OTHER TRANSMITTERS SWITCHING AT 15kbps

Typical Operating Characteristics (continued)

(VCC= +5.0V, C1= C2 = C4 =1µF, C3 = C5 = 4.7µF (Figure 10), TA = +25°C, unless otherwise noted.)