MXL1344ACAG+ Maxim Integrated Products, MXL1344ACAG+ Datasheet

IC CABLE TERM MULTIPROTCL 24SSOP

MXL1344ACAG+

Manufacturer Part Number
MXL1344ACAG+
Description
IC CABLE TERM MULTIPROTCL 24SSOP
Manufacturer
Maxim Integrated Products
Type
Cabler
Datasheet

Specifications of MXL1344ACAG+

Number Of Terminations
6
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
24-SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MXL1344A contains six software-selectable, multi-
protocol cable termination networks. Each network is
capable of terminating V.11 (RS-422, RS-530, RS-530A,
RS-449, V.36 and X.21) with a 100Ω differential load,
V.35 with a T-network load, or V.28 (RS-232) and V.10
(RS-423) with an open-circuit load for use with trans-
ceivers having on-chip termination. The termination pro-
tocol can be selected by the serial interface cable
wiring or by software control. The MXL1344A replaces
discrete resistor termination networks and expensive
relays required for multiprotocol termination, saving
space and cost.
The MXL1344A terminator is designed to form a com-
plete +5V cable- or software-selectable multiprotocol
DCE/DTE interface port when used with the MXL1543
and MXL1544/MAX3175 transceiver ICs. The MXL1344A
terminator can use the V
MXL1543 charge pump, simplifying system design. The
MXL1344A, MXL1543, and MXL1544/MAX3175 are pin-
for-pin compatible with the LTC1344A, LTC1543, and
LTC1544, but for proper operation the entire Maxim
chipset must be used without substituting other manu-
facturer's parts on a chip-by-chip basis.
The MXL1344A is available in a 24-pin SSOP package
and is specified for the 0°C to +70°C commercial tem-
perature range.
19-1775; Rev 0; 2/01
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
D4
________________________________________________________________ Maxim Integrated Products
LL
R4
18
+5V Multiprotocol, Software-Selectable
CTS
13
R3
General Description
5 10 8
DSR
R2
EE
power generated by the
R1
MXL1544/
MAX3175
DCD
D3
22 6
DTR
D2
23 20 19 4
RTS
D1
DB-25 CONNECTOR
1
7
RXD
R3
16 3
o Certified TBR-1 and TBR-2-Compliant Chipset
o Supports V.10 (RS-423), V.11 (RS-422, RS-530,
o Cable- or Software-Selectable Termination
o Cable- or Software-Selectable DTE/DCE
o Replaces Discrete Resistor Termination Networks
o Available in Small 24-Pin SSOP Package
Pin Configuration appears at end of data sheet.
Data Networking
CSU and DSU
Data Routers
MXL1344ACAG
RXC
R2
9 17
(NET1 and NET2)—Pending Completion of
Testing
RS-530A, RS-449, V.36, and X.21), V.28 (RS-232)
and V.35 Termination
and Expensive Relays
R1
PART
MXL1543
Cable Terminator
Typical Operating Circuit
TXC SCTE
12 15 11 24 14 2
D3
D2
TEMP. RANGE
0°C to +70°C
Ordering Information
TXD
D1
PCI Cards
Telecommunication Equipment
Data Switches
Applications
MXL1344A
PIN-PACKAGE
24 SSOP
Features
1

Related parts for MXL1344ACAG+

MXL1344ACAG+ Summary of contents

Page 1

... MAX3175 ________________________________________________________________ Maxim Integrated Products For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. o Certified TBR-1 and TBR-2-Compliant Chipset (NET1 and NET2)—Pending Completion of Testing o Supports V.10 (RS-423), V.11 (RS-422, RS-530, RS-530A, RS-449, V.36, and X.21), V.28 (RS-232) and V ...

Page 2

Multiprotocol, Software-Selectable Cable Terminator ABSOLUTE MAXIMUM RATINGS All Voltages to GND Unless Otherwise Noted Supply Voltages V ........................................................................-0. .........................................................................+0.3V to -7V EE Logic Input Voltages M0, M1, M2, DCE/DTE, LATCH.............................-0.3V to +6V Termination Network Inputs ...

Page 3

Multiprotocol, Software-Selectable (V = +5V -5V +25°C, unless otherwise noted V.11 OR V.35 DIFFERENTIAL-MODE IMPEDANCE vs. TEMPERATURE 106.0 105 -7V CM 105 104 +7V ...

Page 4

Multiprotocol, Software-Selectable Cable Terminator PIN NAME 1 M0 Mode-Select Pin (Table 1) Negative Supply Voltage (typically connected capacitor. 3 R1C Load 1, Center Tap 4 R1B Load 1, Node B 5 R1A Load 1, ...

Page 5

Multiprotocol, Software-Selectable 52Ω AMMETER OFF = ± 52Ω ±7V OR ± Figure 1. V.11 or V.35 Differential Impedance ...

Page 6

Multiprotocol, Software-Selectable Cable Terminator A MXL1344A R1 52Ω S1 CLOSED S2 R3 OPEN 127Ω R2 52Ω B (a) V.11 Figure 4. Termination Modes Table 1. Termination Mode Select Table DCE/ DTE PROTOCOL M2 V.10/RS-423 0 RS-530A 0 RS-530 0 ...

Page 7

Multiprotocol, Software-Selectable 4.7µF 1 CHARGE 1µF PUMP 2 1µF 5 DTE_TXD/DCE_RXD D1 6 DTE_SCTE/DCE_RXC DTE_TXC/DCE_TXC R1 9 DTE_RXC/DCE_SCTE R2 10 DTE_RXD/DCE_TXD R3 11 MXL1543 DCE/DTE ...

Page 8

Multiprotocol, Software-Selectable Cable Terminator The MXL1344A enters no-cable mode when the mode select inputs, M0, M1, and M2 are connected HIGH or left unconnected. In no-cable mode, all six termination networks are placed in V.11 mode, with S1 closed ...

Page 9

Multiprotocol, Software-Selectable GENERATOR 50Ω 125Ω 50Ω Figure 8. Typical V.35 Interface A′ R1 52Ω 52Ω B′ C′ Figure 9. V.35 Termination and Internal Resistance Networks MAX3175. With this cable wiring, the multiprotocol seri- al port is ...

Page 10

Multiprotocol, Software-Selectable Cable Terminator the V.35 receiver. Internal to the MXL1344A, S1 and S2 are closed to connect the T-network resistors to the cir- cuit. The V.35 specification allows for ±4V of ground difference between the V.35 generator and ...

Page 11

Multiprotocol, Software-Selectable A′ R1 52Ω 52Ω B′ C′ Figure 10. V.28 Termination and Internal Resistance Networks SERIAL CONTROLLER TXD SCTE TXC RXC RXD RTS DTR DCD DSR CTS LL Figure 11. DTE-to-DCE X.21 Interface ______________________________________________________________________________________ A ...

Page 12

... 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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