Datasheet

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General Description

The MXL1544/MAX3175 are four-driver/four-receiver

multiprotocol transceivers that operate from a single

+5V supply in conjunction with the MXL1543. The

MXL1544/MAX3175, along with the MXL1543 and

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, EIA-530A,

X.21, RS-423), and V.35 protocols. The MXL1544/

MAX3175 transceivers carry serial interface control sig-

naling, while the MXL1543 carries the high-speed clock

and data signals. Typically, the MXL1543 is terminated

using the MXL1344A. The MAX3175 is identical to the

MXL1544 except for the addition of a 10µs (typ) glitch

rejection circuit at the receiver inputs. The MXL1544/

MAX3175 are available in 28-pin SSOP packages.

Applications

Data Networking

CSU and DSU

Data Routers

Switches

PCI Cards

Telecommunication Equipment

Features

♦ MXL1544/MAX3175, MXL1543, MXL1344A Chipset

Is Pin Compatible with LTC1544, LTC1543,

LTC1344A Chipset

♦ Chipset Operates from a Single +5V Supply

♦ Software-Selectable DCE/DTE

♦ Supports V.28 (RS-232), V.10/V.11 (RS-449/V.36,

EIA-530, EIA-530A, X.21, RS-423) Protocols

♦ Flow-Through Pin Configuration

♦ True Fail-Safe Operation

♦ Low 0.5µA Shutdown Current (No-Cable Mode)

♦ 10µs Receiver Input Deglitching (MAX3175 Only)

♦ TUV-Certified NET1/NET2 and TBR1/TBR2

Compliant

MXL1544/MAX3175

+5V Multiprotocol, Software-Selectable

Control Transceivers

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-1992; Rev 0; 4/01

PART TEMP. RANGE PIN-PACKAGE

MXL1544CAI 0°C to +70°C 28 SSOP

MAX3175CAI 0°C to +70°C 28 SSOP

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 (20 pages)

PAGE 1
9-1992; Rev 0; 4/01 +5V Multiprotocol, Software-Selectable Control Transceivers Features ♦ MXL1544/MAX3175, MXL1543, MXL1344A Chipset Is Pin Compatible with LTC1544, LTC1543, LTC1344A Chipset ♦ Chipset Operates from a Single +5V Supply ♦ Software-Selectable DCE/DTE ♦ Supports V.28 (RS-232), V.10/V.11 (RS-449/V.36, EIA-530, EIA-530A, X.21, RS-423) Protocols ♦ Flow-Through Pin Configuration ♦ True Fail-Safe Operation ♦ Low 0.
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MXL1544/MAX3175 +5V Multiprotocol, Software-Selectable Control Transceivers ABSOLUTE MAXIMUM RATINGS All Voltages to GND Unless Otherwise Noted Supply Voltages VCC .......................................................................-0.3V to +6V VDD ....................................................................-0.3V to +7.2V VEE........................................................................+0.3V to -7V VDD to VEE (Note 1)............................................................
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+5V Multiprotocol, Software-Selectable Control Transceivers (VCC = +5V, VDD = +6.8V, VEE = -5.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP 3 4.5 MAX UNITS 0.8 V 50 mA LOGIC OUTPUTS (R1OUT, R2OUT, R3OUT, R4OUT) 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.
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MXL1544/MAX3175 +5V Multiprotocol, Software-Selectable Control Transceivers ELECTRICAL CHARACTERISTICS (continued) (VCC = +5V, VDD = +6.8V, VEE = -5.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ±6 V V.10 TRANSMITTER Open-Circuit Output Voltage Swing VO Output Voltage Swing VT Short-Circuit Current ISC Output Leakage Current IZ RL = 3.9kΩ (Figure 3) ±4 RL = 450Ω (Figure 3) ±3.
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+5V Multiprotocol, Software-Selectable Control Transceivers (VCC = +5V, VDD = +6.8V, VEE = -5.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS tPLH Receiver Input to Output (Figures 4, 8) tPHL MIN TYP MAX MXL1544 60 100 MAX3175 10 MXL1544 70 MAX3175 10 UNITS ns µs 450 ns µs Note 2: MXL1544/MAX3175 are designed to operate with VDD and VEE supplied by the MXL1543 charge pump.
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Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) DCE MODE INVERT = 0 FULL LOAD, RL = 3kΩ, CL = 2500pF DCE MODE INVERT = 0 30 25 IEE (mA) 20 15 10 FULL LOAD, RL = 3kΩ, CL = 2500pF 10 5 5 NO LOAD NO LOAD 0 0 0 50 100 150 DATA RATE (kbps) 200 0 250 2 DCE MODE INVERT = 1 RL = 50Ω 0 -1 -2 200 250 VOUT- 10 8 VOUT+ 6 OUTPUT VOLTAGE (V) MXL1544/MAX3175 toc07 VOUT+ 1 150 V.10 LOADED OUTPUT VOLTAGE vs.
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+5V Multiprotocol, Software-Selectable Control Transceivers V.28 RECEIVER INPUT CURRENT vs. INPUT VOLTAGE V.28 SLEW RATE vs. LOAD CAPACITANCE 2 16 14 1 0 -1 12 SLEW+ 10 8 -2 6 -3 4 -4 2 -5 SLEW- 0 -15 -10 -5 0 5 10 15 0 1000 2000 3000 4000 5000 INPUT VOLTAGE (V) CAPACITANCE (pF) V.10 TRANSMITTER RISE AND FALL TIME vs. LOAD CAPACITANCE MXL1544 LOOPBACK SCOPE PHOTO V.11 MODE (UNLOADED) MXL1544/MAX3175 toc14 MXL1544/MAX3175 toc13 3.5 RISE 3.
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+5V Multiprotocol, Software-Selectable Control Transceivers MXL1544/MAX3175 Pin Description 8 PIN NAME 1 VCC +5V Supply Voltage (±5%). Bypass with a 1µF capacitor to ground. FUNCTION 2 VDD Positive Supply Generated by MXL1543. Bypass with a 1µF capacitor to ground.
PAGE 9
+5V Multiprotocol, Software-Selectable Control Transceivers D A R VOD VO CL RL VOC R Figure 1. V.11 DC Test Circuit Figure 3. V.10/V.28 Driver Test Circuit 100pF D B B D R A R 100Ω A A 15pF 15pF 100pF Figure 2. V.11 AC Test Circuit Detailed Description The MXL1544/MAX3175 are four-driver/four-receiver multiprotocol transceivers that operate from a single +5V supply and the charge pump from the MXL1543.
PAGE 10
MXL1544/MAX3175 +5V Multiprotocol, Software-Selectable Control Transceivers Switching Time Waveforms 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(B) - V(A) 50% 1/2 V0 10% tf A V0 B tSKEW tSKEW Figure 5. V.11, V.35 Driver Propagation Delays V0D2 B-A -V0D2 f = 1MHz: tr ≤ 10ns: tf ≤ 10ns 0 INPUT 0 tPHL tPLH V0H OUTPUT 1.5V R 1.5V V0L Figure 6. V.11, V.35 Receiver Propagation Delays 3V 1.
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+5V Multiprotocol, Software-Selectable Control Transceivers Fail-Safe The MXL1544/MAX3175 guarantee a logic HIGH receiver output when the receiver inputs are shorted or open, or when they are connected to a terminated transmission line with all drivers disabled. The V.11 receiver threshold is set between -200mV and 0mV to guarantee fail-safe operation. If the differential receiver input voltage (B - A) is ≥ 0mV, ROUT is logic HIGH.
PAGE 12
MXL1544/MAX3175 +5V Multiprotocol, Software-Selectable Control Transceivers C6 C7 C8 100pF 100pF 100pF 3 8 11 12 13 VCC 5V MXL1344A 14 25 C4 1µF DTE_TXD/DCE_RXD 5 DTE_SCTE/DCE_RXC 6 D2 7 R1 9 DTE_RXC/DCE_SCTE R2 10 DTE_RXD/DCE_TXD VEE C12 1µF 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 DCE RXD A RXD B RXC A RXC B 20 19 15 12 TXC A TXC B 18 17 16 15 17 9 D3 8 DTE_TXC/DCE_TXC 2 C5 4.
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+5V Multiprotocol, Software-Selectable Control Transceivers MXL1544/MAX3175 UNBALANCED INTERCONNECTING CABLE GENERATOR LOAD CABLE TERMINATION A A′ C C′ RECEIVER Figure 10. Typical V.10/V.28 Interface IZ 3.25mA -3V -10V VZ +10V +3V -3.25mA Figure 11. Receiver Input Impedance Curve A′ A MXL1544 MAX3175 R5 30kΩ R8 5kΩ R6 10kΩ RECEIVER BALANCED INTERCONNECTING CABLE GENERATOR LOAD CABLE RECEIVER TERMINATION A′ A 100Ω MIN B B′ C C′ Figure 13. Typical V.
PAGE 14
MXL1544/MAX3175 +5V Multiprotocol, Software-Selectable Control Transceivers A′ A A′ R8 5kΩ A MXL1544 MAX3175 R5 30kΩ R8 5kΩ R6 10kΩ R6 10kΩ RECEIVER R7 10kΩ R7 10kΩ R4 30kΩ B B′ C′ R4 30kΩ B C′ GND GND Figure 14. V.11 Internal Resistance Networks DTE vs. DCE Operation Figure 16 shows a port with one DB-25 connector that can be configured for either DTE or DCE operation. The configuration requires separate cables for proper signal routing in DTE or DCE operation.
PAGE 15
+5V Multiprotocol, Software-Selectable Control Transceivers M2 M1 M0 DCE/ DTE INVERT T1 T2 T3 R1 R2 R3 T4 R4 Not Used (Default V.11) 0 0 0 0 0 V.11 V.11 Z V.11 V.11 V.11 Z V.10 RS-530A 0 0 1 0 0 V.11 V.10 Z V.11 V.10 V.11 Z V.10 RS-530 0 1 0 0 0 V.11 V.11 Z V.11 V.11 V.11 Z V.10 X.21 0 1 1 0 0 V.11 V.11 Z V.11 V.11 V.11 Z V.10 V.35 1 0 0 0 0 V.28 V.28 Z V.28 V.28 V.28 Z V.28 RS-449/V.36 1 0 1 0 0 V.11 V.11 Z V.11 V.
PAGE 16
MXL1544/MAX3175 +5V Multiprotocol, Software-Selectable Control Transceivers C6 C7 C8 100pF 100pF 100pF 3 8 11 VCC 5V 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 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 17
+5V Multiprotocol, Software-Selectable Control Transceivers MXL1544/MAX3175 C6 C7 C8 100pF 100pF 100pF 3 8 VCC 5V 11 12 13 MXL1344A 14 27 26 CHARGE PUMP 2 4 25 C4 1µF RXD 5 RXC 6 D2 5 4 6 7 9 10 16 15 18 17 19 20 22 23 24 1 VCC 3 RXD A (104) 16 RXD B 17 RXC A (115) 9 RXC B 15 TXC A (114) 12 TXC B 24 SCTE A (113) 11 SCTE B 2 TXD A (103) 14 TXD B 7 SGND (102) 18 17 16 15 R2 10 TXD VEE C12 1µF 20 19 R1 9 SCTE 21 D3 8 TXC 2 C5 4.
PAGE 18
MXL1544/MAX3175 +5V Multiprotocol, Software-Selectable Control Transceivers C6 C7 C8 100pF 100pF 100pF 3 8 VCC 5V 11 12 13 MXL1344A 14 27 26 CHARGE PUMP 2 4 25 C4 1µF TXD 5 SCTE 6 D1 D2 7 R1 9 RXC R2 10 RXD 2 C5 4.7µF VEE C12 1µF 5 4 6 7 9 10 16 15 18 17 19 20 22 23 24 1 24 23 22 21 2 TXD A (103) 14 TXD B 24 SCTE A (113) 11 SCTE B 20 19 15 12 18 17 16 15 17 9 D3 8 TXC 21 M0 1 C1 1µF LATCH C2 1µF DCE/DTE M2 M1 C3 4.
PAGE 19
+5V Multiprotocol, Software-Selectable Control Transceivers TOP VIEW VCC 1 28 VEE VDD 2 27 GND T1IN 3 26 T1OUTA T2IN 4 25 T1OUTB T3IN 5 R1OUT 6 24 T2OUTA MXL1544 MAX3175 23 T2OUTB R2OUT 7 22 T3OUTA/R1INA R3OUT 8 21 T3OUTB/R1INB T4IN 9 20 R2INA R4OUT 10 19 R2INB M0 11 18 R3INA M1 12 17 R3INB M2 13 16 T4OUTA/R4INA DCE/DTE 14 15 INVERT SSOP ______________________________________________________________________________________ 19 MXL1544/MAX3175 Pin Configuration Chip Informati
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+5V Multiprotocol, Software-Selectable Control Transceivers SSOP.EPS MXL1544/MAX3175 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.