MXL1543CAI Datasheet, PDF (1/18 Pages) Maxim Integrated Products – +5V Multiprotocol, 3Tx/3Rx, Software-Selectable Clock/Data Transceivers

19-1929; Rev 1; 9/01
+5V Multiprotocol, 3Tx/3Rx, Software-
Selectable Clock/Data Transceivers
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
Data Networking
PCI Cards
CSU and DSU
Data Routers
Telecommunications
Equipment
Features
o MXL1543, MXL1544/MAX3175, and MXL1344A
Chipset Is Pin Compatible with LTC1543,
LTC1544, and LTC1344A
o Supports RS-232, RS-449, EIA-530, EIA-530A,
V.35, V.36, and X.21
o Software-Selectable Cable Termination Using the
MXL1344A
o Complete DTE or DCE Port with MXL1544/
MAX3175, and MXL1344A
o +5V Single-Supply Operation
o 0.5µA No-Cable Mode
o TUV-Certified NET1/NET2 and TBR1/TBR2-
Compliant
PART
MXL1543CAI
Ordering Information
TEMP. RANGE
0° to +70°C
PIN-PACKAGE
28 SSOP
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
LL CTS DSR
DCD DTR RTS
RXD RXC
TXC SCTE TXD
D4
R4
R3
R2
MXL1544 D3
R1 _MAX3175
D2
D1
R3
R2
MXL1543 D3
R1
D2
D1
MXL1344A
18 13 5 10 8
22 6 23 20 19 4
1 7 16 3 9 17
12 15 11 24 14 2
DB-25 CONNECTOR
________________________________________________________________ Maxim Integrated Products 1
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