Datasheet

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General Description

The MXL1543 is a three-driver/three-receiver multipro-

tocol transceiver that operates from a +5V single sup-

ply. The MXL1543, along with the MXL1544/MAX3175

and the MXL1344A, form a complete software-selec-

table data terminal equipment (DTE) or data communi-

cation equipment (DCE) interface port that supports the

V.28 (RS-232), V.10/V.11 (RS-449/V.36, EIA-530, EIA-

530A, X.21), and V.35 protocols. The MXL1543 trans-

ceivers 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.35-

compliant operation from a +5V single supply. A no-

cable mode is entered when all mode pins (M0, M1,

and M2) are pulled high or left unconnected. In no-

cable 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

PART TEMP. RANGE PIN-PACKAGE

MXL1543CAI 0° to +70°C 28 SSOP

Data Networking

CSU and DSU

Data Routers

PCI Cards

Telecommunications

Equipment

Typical Operating Circuit

D1D2

D3D4

R2R3

MXL1543

RXD RXC TXDTXC SCTE

D1D2

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

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.

Summary of content (18 pages)

PAGE 1
9-1929; Rev 1; 9/01 +5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers 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.
PAGE 2
MXL1543 +5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers ABSOLUTE MAXIMUM RATINGS All Voltages Referenced to GND Unless Otherwise Noted. Supply Voltages VCC .......................................................................-0.3V to +6V VDD ....................................................................-0.3V to +7.3V VEE.....................................................................+0.3V to -6.5V VDD to VEE (Note 1) ......................................................
PAGE 3
+5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers (VCC = +5.0V, C1 = C2 = C4 = 1µF, C3 = C5 = 4.7µF, (Figure 10), TA = TMIN to TMAX. Typical values are at TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP 3 4.5 MAX UNITS LOGIC OUTPUTS (R1OUT, R2OUT, R3OUT) Output High Voltage VOH ISOURCE = 4mA Output Low Voltage VOL ISINK = 4mA Output Short-Circuit Current ISC 0 ≤ VOUT ≤ VCC Output Pullup Current IL 0.3 0.
PAGE 4
MXL1543 +5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers ELECTRICAL CHARACTERISTICS (continued) (VCC = +5.0V, C1 = C2 = C4 = 1µF, C3 = C5 = 4.7µF, (Figure 10), TA = TMIN to TMAX. Typical values are at TA = +25°C, unless otherwise noted.) PARAMETER TYP MAX UNITS -0.25V ≤ VOUT ≤ +0.
PAGE 5
+5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers V.28 SUPPLY CURRENT vs. DATA RATE 80 60 40 100 1000 50 DATA RATE (kbps) V.11 DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs. TEMPERATURE VOUT+ 250 2 1 0 -1 VOUT- 2 0 -2 -4 -6 -4 -8 -5 VOUT+ 4 20 30 40 50 60 70 100 1000 10,000 0.66 VOH DCE MODE, VCM = 0 FULL LOAD 0.44 0.22 0 -0.22 -0.44 VOUT- VOL -0.66 -10 10 10 V.35 OUTPUT VOLTAGE vs. TEMPERATURE 6 -3 0 0.1 0.
PAGE 6
+5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers MXL1543 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 V.28 LOOPBACK OPERATION MXL1543 toc10 R = 50Ω 5V/div TIN TOUT/RIN 5V/div ROUT 5V/div 5V/div TIN TOUT/RIN 5V/div TOUT/RIN ROUT 5V/div 5V/div ROUT V.28 SLEW RATE vs. CLOAD V.11 TRANSMITTER PROPAGATION DELAY vs. TEMPERATURE V.
PAGE 7
+5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers 100pF D R B B R 100Ω A A VOD 15pF VOC R 100pF Figure 1. V.11 DC Test Circuit Figure 2. V.11 AC Test Circuit 50Ω D B 125Ω 50Ω VCM 125Ω B VOD R A 50Ω A 50Ω 15pF Figure 3. V.35 Transmitter/Receiver Test Circuit D A D VO C L Figure 4. V.28 Driver Test Circuit A R RL 15pF Figure 5. V.
PAGE 8
+5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers MXL1543 Timing Diagrams 5V D f = 1MHz: tr ≤10ns: tf ≤ 10ns 1.5V 0 1.5V tPLH tPHL V0 90% 10% 50% B—A -V0 tr 90% VDIFF = V(A) - V(B) 50% 1/2 V0 10% tf A V0 B tSKEW tSKEW Figure 6. V.11, V.35 Driver Propagation Delays V0 B—A -V0 f = 1MHz: tr ≤10ns: tf ≤ 10ns 0 INPUT 0 tPHL tPLH V0H 1.5V R OUTPUT 1.5V V0L Figure 7. V.11, V.35 Receiver Propagation Delays 3V 1.5V D 0 1.
PAGE 9
+5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers PIN NAME 1 C1- Capacitor C1 Negative Terminal. Connect a 1µF ceramic capacitor between C1+ and C1-. FUNCTION 2 C1+ Capacitor C1 Positive Terminal. Connect a 1µF ceramic capacitor between C1+ and C1-. 3 VDD Generated Positive Supply. Connect a 4.7µF ceramic capacitor to ground. 4 VCC +5V Supply Voltage (±5%). Decouple with a 1µF capacitor to ground.
PAGE 10
MXL1543 +5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers Table 1. Mode Selection MXL1543 MODE NAME M2 M1 M0 DCE/ DTE T1 T2 T3 R1 R2 R3 Not Used (Default V.11) 0 0 0 0 V.11 V.11 Z V.11 V.11 V.11 RS-530A 0 0 1 0 V.11 V.11 Z V.11 V.11 V.11 RS-530 0 1 0 0 V.11 V.11 Z V.11 V.11 V.11 X.21 0 1 1 0 V.11 V.11 Z V.11 V.11 V.11 V.35 1 0 0 0 V.35 V.35 Z V.35 V.35 V.35 RS-449/V.36 1 0 1 0 V.11 V.11 Z V.11 V.11 V.11 V.
PAGE 11
+5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers MXL1543 C6 C7 C8 100pF 100pF 100pF 3 8 VCC 5V 11 12 13 MXL1344A 14 25 C4 1µF DTE_TXD/DCE_RXD 5 DTE_SCTE/DCE_RXC 6 D2 7 5 4 6 7 9 10 16 15 18 17 19 20 22 23 24 1 VCC DTE 2 TXD A 14 TXD B 24 SCTE A 11 SCTE B 15 12 17 9 18 17 16 15 R2 10 DTE_RXD/DCE_TXD C12 1µF 20 19 R1 9 DTE_RXC/DCE_SCTE VEE DCE RXD A RXD B RXC A RXC B D3 8 DTE_TXC/DCE_TXC 2 C5 4.
PAGE 12
MXL1543 +5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers BALANCED INTERCONNECTING CABLE GENERATOR IZ CABLE TERMINATION A 3.25mA LOAD RECEIVER -10V -3V VZ +10V A′ +3V 100Ω MIN B B′ C C′ GND GND Figure 13. Receiver Input Impedance Cable-Selectable Mode Figure 12. Typical V.11 Interface V.11 and V.35 modes. If the differential receiver input voltage (B - A) is ≥ -25mV, R_OUT is logic HIGH. If (B A) is ≤ -200mV, R_OUT is logic LOW.
PAGE 13
+5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers MXL1543 A′ A MXL1543 R5 30kΩ R1 52Ω R8 5kΩ MXL1344A RECEIVER S3 S1 S2 R6 10kΩ R3 124Ω R7 10kΩ R2 52Ω B′ R4 30kΩ B C′ GND Figure 14. V.11 Termination and Internal Resistance Networks BALANCED INTERCONNECTING CABLE GENERATOR LOAD 50Ω CABLE TERMINATION A′ A 125Ω 125Ω 50Ω RECEIVER 50Ω 50Ω B B′ C C′ GND GND Figure 15. Typical V.
PAGE 14
MXL1543 +5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers UNBALANCED INTERCONNECTING CABLE GENERATOR LOAD CABLE TERMINATION A A′ C C′ GND RECEIVER GND Figure 17. Typical V.28 Interface A′ A MXL1543 R5 30kΩ R1 52Ω R8 5kΩ MXL1344A S1 S2 R6 10kΩ S3 R3 124Ω R7 10kΩ R2 52Ω B′ RECEIVER R4 30kΩ B C′ GND Figure 18. V.28 Termination and Internal Resistance Networks load termination networks. The V.
PAGE 15
+5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers MXL1543 C6 C7 C8 100pF 100pF 100pF 3 8 VCC 5V 11 12 13 MXL1344A 14 27 26 CHARGE PUMP 2 4 25 C4 1µF DTE_TXD/DCE_RXD 5 DTE_SCTE/DCE_RXC 6 D2 7 5 4 6 7 9 10 16 15 18 17 19 20 22 23 24 1 DTE 2 TXD A 14 TXD B 24 SCTE A 11 SCTE B 15 12 17 9 18 17 16 15 R2 10 DTE_RXD/DCE_TXD VEE C12 1µF 20 19 R1 9 DTE_RXC/DCE_SCTE 21 DCE RXD A RXD B RXC A RXC B D3 8 DTE_TXC/DCE_TXC 2 C5 4.
PAGE 16
MXL1543 +5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers DTE SERIAL CONTROLLER MXL1543 DCE MXL1344A MXL1344A TXD D1 TXD SCTE D2 SCTE D3 TXC R3 RXC R2 RXD R1 104Ω 104Ω MXL1543 SERIAL CONTROLLER R3 TXD R2 SCTE R1 104Ω 104Ω 104Ω TXC D1 TXC RXC D2 RXC RXD D3 RXD MXL1544 MAX3175 MXL1544 MAX3175 RTS D1 RTS R3 RTS DTR D2 DTR R2 DTR D3 R1 DCD R1 DCD D3 DCD DSR R2 DSR D2 DSR CTS R3 CTS D1 CTS LL D4 R4 LL R4 LL D4 Figure 20.
PAGE 17
+5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers Pin Configuration TOP VIEW C1- 1 28 C2+ C1+ 2 27 C2- VDD 3 26 VEE VCC 4 25 GND T1IN 5 T2IN 6 24 T1OUTA MXL1543 23 T1OUTB T3IN 7 22 T2OUTA R1OUT 8 21 T2OUTB R2OUT 9 20 T3OUTA/R1INA R3OUT 10 19 T3OUTB/R1INB M0 11 18 R2INA M1 12 17 R2INB M2 13 16 R3INA DCE/DTE 14 15 R3INB SSOP ______________________________________________________________________________________ 17 MXL1543 Chip Information TRANSISTOR COUNT: 2
PAGE 18
+5V Multiprotocol, 3Tx/3Rx, SoftwareSelectable Clock/Data Transceivers SSOP.EPS MXL1543 Package Information Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.