MAXIM MXL1543 User Manual

General Description

The MXL1543 is a three-driver/three-receiver multipro­tocol transceiver that operates from a +5V single sup­ply. The MXL1543, 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 MXL1543 trans­ceivers carry the high-speed clock and data signals
while the MXL1544/MAX3175 carry the control signals.
The MXL1543 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

♦ MXL1543, 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

MXL1543

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

Selectable Clock/Data Transceivers

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-1929; Rev 1; 9/01

Data Networking

CSU and DSU

Data Routers

PCI Cards

Telecommunications
Equipment

Typical Operating Circuit

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.

PART TEMP. RANGE PIN-PACKAGE

MXL1543CAI 0° to +70°C 28 SSOP

CTS DSR RTSDTRDCD

LL

R4

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

LL A (141)

R2R3

13

CTS A (106)

DSR B

CTS B

MAX3175

DSR A (109)

MXL1544

R1

D3

DCD A (107)

DCD B

DTR A (108)

DTR B

D1D2

RTS A (105)

RTS B

DB-25 CONNECTOR

RXD RXC TXDTXC SCTE

MXL1543

R1

R2R3

RXC B

RXD A (104)

RXD B

SG (102)

SHIELD (101)

RXC A (115)

D3D4

TXC A (114)

TXC B

SCTE A (113)

SCTE B

D1D2

TXD B

TXD A (103)

MXL1344A

MXL1543

+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 oth-

erwise 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

Continuous Power Dissipation (T

A

= +70°C)

28-Pin SSOP (derate 11.1mW/°C above +70°C) .........889mW

Operating Temperature Range

MXL1543CAI .......................................................0°C to 70°C

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

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

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

Note 1: VDDand VEEabsolute difference cannot exceed 13V.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DC CHARACTERISTICS

V

Operating Range V

CC

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

)

V

CC

(Transmitter Outputs Static)

Internal Power Dissipation
(DCE Mode)

Positive Charge-Pump
Output Voltage

Negative Charge-Pump
Output Voltage

Supply Rise Time t

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

Input High Voltage V

Input Low Voltage V

Logic Input Current I

CC

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

I

CC

P

V

DD

V

EE

IH

IL

IN

V.35 mode, full load 126 170

V.28 mode, no load 20

V.28 mode, full load 40 75

No-cable mode 0.5 10 µA

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

V.35 mode, full load 600

D

V.28 mode, full load 140

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

V.28 mode, with load 6.4 6.8

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

V.28, V.35, no load -5.6

V.28 mode, full load -5.6 -5.4

V.35 mode, full load -5.6 -5.4

RS-530, RS-530A, X.21, full load -5.6 -5.4

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

r

T1IN, T2IN, T3IN ±10
M0, M1, M2, DCE/DTE = GND -100 -50 -30
M0, M1, M2, DCE/DTE = V

CC

4.75 5.25 V

2.0

0.8

±10

mA

mW

V

V

V

µA

MXL1543

+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.)

LOGIC OUTPUTS (R1OUT, R2OUT, R3OUT)

Output High Voltage V

Output Low Voltage V

Output Short-Circuit Current I

Output Pullup Current I

V.11 TRANSMITTER

Open-Circuit Differential Output
Voltage

Loaded Differential Output
Voltage

Change in Magnitude of Output
Differential Voltage

Common-Mode Output Voltage V

Change in Magnitude of Output
Common-Mode Voltage

Short-Circuit Current I

Output Leakage Current I

Rise or Fall Time t

Transmitter Input to Output
Delay

Data Skew It

Output to Output Skew t

V.11 RECEIVER

Differential Threshold Voltage V

Input Hysteresis ∆V

Receiver Input Current I

Receiver Input Resistance R

Rise or Fall Time tr, t

Receiver Input to Output Delay t

Data Skew |t

V.35 TRANSMITTER

Differential Output Voltage V

Output High Current I

Output Low Current I

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

V

V

OH

OL

SC

L

ODO

ODL

I

SOURCE

I

SINK

0 ≤ V

V

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

R = 50Ω (Figure 1), TA = +25oC

= 4mA 3 4.5

= 4mA 0.3 0.8

≤ V

OUT

CC

= 0, no-cable mode 70 µA

OUT

R = 50Ω (Figure 1) ±2

∆V

OD

OC

∆V

OC

SC

Z

,

t

r

t

t

PHL

,

- t

PHL

SKEW

TH

TH

IN

IN

PHL,tPLH

- t

PHL

OD

OH

OL

R = 50Ω (Figure 1) 0.2 V

R = 50Ω (Figure 1) 3.0 V

R = 50Ω (Figure 1) 0.2 V

V

= GND 150 mA

OUT

-0.25V ≤ V

≤ +0.25V, power-off or

OUT

no-cable mode

(Figures 2, 6) 2 10 25 ns

f

(Figures 2, 6) 40 80 ns

PLH

I (Figures 2, 6) 3 12 ns

PLH

(Figures 2, 6) 3 ns

-7V ≤ VCM ≤ 7V -200 200 mV

-7V ≤ VCM ≤ 7V 15 40 mV

-10V ≤ V

-10V ≤ V

(Figures 2, 7) 15 ns

f

≤10V ±0.66 mA

A, B

≤ 10V 15 30 kΩ

A, B

(Figures 2, 7) 50 80 ns

| (Figures 2, 7) 4 16 ns

PLH

Open circuit (Figure 3) ±7

With load, -4V ≤ VCM ≤ 4V (Figure 3) ±0.44 ±0.55 ±0.66

V

= 0 -13 -11 -9 mA

A,B

V

= 0 9 11 13 mA

A,B

✕

0.5

V

ODO

±1 ±100 µA

±50 mA

✕

0.67
V

ODO

V

V

V

MXL1543

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

4 _______________________________________________________________________________________

,

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.)

Output Leakage Current I

Rise or Fall Time tr, t

Transmitter Input to Output
Delay

Data Skew |t

Output-to-Output Skew t

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Z

f

t

t

PHL

PLH

PHL–tPLH

SKEW

-0.25V ≤ V
cable mode

(Figures 3, 6) 5 ns

(Figures 3, 6) 35 80 ns

| (Figures 3, 6) 4 16 ns

(Figures 3, 6) 4 ns

≤ +0.25V, power-off or no-

OUT

V.35 RECEIVER

Differential Input Voltage V

Input Hysteresis ∆V

Receiver Input Current I

Receiver Input Resistance R

Rise or Fall Time tr, t

Receiver Input to Output Delay t

Data Skew |t

PHL

PHL–tPLH

TH

TH

IN

IN

, t

-2V ≤ VCM ≤ 2V (Figure 3) -200 200 mV

-2V ≤ VCM ≤ 2V (Figure 3) 15 40 mV

-10V ≤ VA,B ≤ 10V ±0.66 mA

-10V ≤ VA,B ≤ 10V 15 30 kΩ

(Figures 3, 7) 15 ns

f

(Figures 3, 7) 50 80 ns

PLH

| (Figures 3, 7) 4 16 ns

V.28 TRANSMITTER

Output Voltage Swing (Figure 4) V

Short-Circuit Current I

Output Leakage Current I

O

SC

Z

Open circuit ±7

RL = 3kΩ±5 ±6

-0.25V ≤ V

≤ +0.25V, power-off or no-

OUT

cable mode

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

Transmitter Input to Output
Delay

Transmitter Input to Output
Delay

t

PHL

t

PLH

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

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

V.28 RECEIVER

Input Threshold Low V

Input Threshold High V

Input Hysteresis V

Input Resistance R

Rise or Fall Time tr, t

Receiver Input to Output Delay t

Receiver Input to Output Delay t

IL

IH

HYST

IN

PHL

PLH

-15V ≤ VIN ≤ +15V 3 5 7 kΩ

(Figures 5, 9) 15 ns

f

(Figures 5, 9) 60 100 ns

(Figures 5, 9) 160 250 ns

±1 ±100 µA

±1 ±100 µA

0.8 1.2 V

1.2 2.0 V

0.05 0.3 V

±150 mA

V

MXL1543

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

Selectable Clock/Data Transceivers

_______________________________________________________________________________________ 5

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.)

V.11 SUPPLY CURRENT

vs. DATA RATE

160

140

120

100

80

60

SUPPLY CURRENT (mA)

40

DCE MODE, R = 50Ω, ALL TRANSMITTERS

20

OPERATING AT THE SPECIFIED DATA RATE

0

0.1 100 1000

101 10,000

DATA RATE (kbps)

V.11 DRIVER DIFFERENTIAL OUTPUT

VOLTAGE vs. TEMPERATURE

5

DCE MODE, R = 50Ω

4

3

2

1

0

-1

-2

-3

-4

DRIVER DIFFERENTIAL OUTPUT VOLTAGE (V)

-5
0 10203040506070

TEMPERATURE (°C)

100

MXL1543 toc01

80

60

40

SUPPLY CURRENT (mA)

20

0

10

V

OUT+

V

OUT-

MXL1543 toc04

-2

OUTPUT VOLTAGE (V)

-4

-6

-8

-10

8

6

4

2

0

V.28 SUPPLY CURRENT

vs. DATA RATE

DCE MODE ALL TRANSMITTERS
OPERATING AT THE SPECIFIED DATA RATE

= 3kΩ, CL = 2500pF

R

L

0 10050 150 200 250

DATA RATE (kbps)

V.28 OUTPUT VOLTAGE

vs. TEMPERATURE

DCE MODE, RL = 3kΩ

0304010 20 50 60 70

TEMPERATURE (°C)

V

OUT+

V

OUT-

V.35 SUPPLY CURRENT

vs. DATA RATE

200

180

MXL1543 toc02

160

140

120

100

80

60

SUPPLY CURRENT (mA)

40

DCE MODE, FULL LOAD, ALL TRANSMITTERS

20

OPERATING AT THE SPECIFIED DATA RATE

0

0.1 100 1000

100.1 10,000

DATA RATE (kbps)

V.35 OUTPUT VOLTAGE

vs. TEMPERATURE

0.66

DCE MODE, VCM = 0

0.44

MXL1543 toc05

FULL LOAD

0.22

0

-0.22

OUTPUT VOLTAGE (V)

-0.44

-0.66
0304010 20 50 60 70

TEMPERATURE (°C)

MXL1543 toc03

V

OH

V

OL

MXL1543 toc06

V.35 DIFFERENTIAL OUTPUT VOLTAGE

vs. COMMON-MODE VOLTAGE

600

590

580

570

560

550

540

DIFFERENTIAL OUTPUT VOLTAGE (mV)

530

520

-4 -2 -1-3 01234

|VOD|

COMMON-MODE VOLTAGE (V)

MXL1543 toc07

V.11/V.35 RECEIVER INPUT CURRENT

vs. INPUT VOLTAGE

300

DCE MODE

200

100

0

-100

RECEIVER INPUT CURRENT (µA)

-200

-300

-10 -2-4-8-6 0246810
INPUT VOLTAGE (V)

V.28 RECEIVER INPUT CURRENT

2.5

DCE MODE

2.0

MXL1543 toc08

1.5

1.0

0.5

0

-0.5

-1.0

-1.5

RECEIVER INPUT CURRENT (mA)

-2.0

-2.5

-10 -2-4-8-6 0246810

vs. INPUT VOLTAGE

MXL1543 toc09

INPUT VOLTAGE (V)

MXL1543

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

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

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

V.11 LOOPBACK OPERATION

R = 50Ω

T

IN

T

OUT/RIN

R

OUT

200ns/div

V.28 SLEW RATE vs. C

24
22

20
18
16
14
12
10

SLEW RATE (V/µs)

8
6

RL = 3kΩ

4

1 TRANSMITTER SWITCHING AT 250kbps.

2

OTHER TRANSMITTERS SWITCHING AT 15kbps

0

0 1000 2000 3000 4000 5000

+SLEW

C

LOAD

(pF)

-SLEW

LOAD

MXL1543 toc10

5V/div

5V/div

5V/div

MXL1543 toc13

V.28 LOOPBACK OPERATION

CL = 2500pF
RL = 3kΩ

T

IN

T

OUT/RIN

R

OUT

1µs/div

V.11 TRANSMITTER PROPAGATION DELAY

vs. TEMPERATURE

80

70

60

0203010

t

PLH

t

PHL

TEMPERATURE (°C)

40

50

40

30

PROPAGATION DELAY (ns)

20

10

0

MXL1543 toc11

50 60 70

5V/div

5V/div

5V/div

MXL1543 toc14

V.35 LOOPBACK OPERATION

FULL LOAD

T

IN

T

OUT/RIN

R

OUT

200ns/div

V.11 RECEIVER PROPAGATION DELAY

vs. TEMPERATURE

80

70

0203010

t

PHL

t

PLH

TEMPERATURE (°C)

60

50

40

30

PROPAGATION DELAY (ns)

20

10

0

40

MXL1543 toc12

5V/div

1V/div

5V/div

MXL1543 toc15

50 60 70

V.35 TRANSMITTER PROPAGATION DELAY

vs. TEMPERATURE

80

70

60

50

40

30

PROPAGATION DELAY (ns)

20

10

0

0203010

t

PLH

t

PHL

40

TEMPERATURE (°C)

50 60 70

MXL1543 toc16

V.35 RECEIVER PROPAGATION DELAY

vs. TEMPERATURE

100

90

80

70

60

50

40

30

PROPAGATION DELAY (ns)

20

10

0

0203010

t

PHL

t

PLH

40

TEMPERATURE (°C)

50 60 70

MXL1543 toc17