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MXL1344A Datasheet

  • MXL1344A

  • +5V Multiprotocol, Software-Selectable Cable Terminator

  • 221.38KB

  • 12頁

  • MAXIM   MAXIM

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19-1775; Rev 0; 2/01
+5V Multiprotocol, Software-Selectable
Cable Terminator
General Description
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 100鈩?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
EE
power generated by the
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擄C to +70擄C commercial tem-
perature range.
Features
o
Certified TBR-1 and TBR-2-Compliant Chipset
(NET1 and NET2)鈥擯ending 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.35 Termination
o
Cable- or Software-Selectable Termination
o
Cable- or Software-Selectable DTE/DCE
o
Replaces Discrete Resistor Termination Networks
and Expensive Relays
o
Available in Small 24-Pin SSOP Package
MXL1344A
Applications
Data Networking
CSU and DSU
Data Routers
PCI Cards
Telecommunication Equipment
Data Switches
Ordering Information
PART
MXL1344ACAG
TEMP. RANGE
0擄C to +70擄C
PIN-PACKAGE
24 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
R1
MXL1544/
MAX3175
D3
D2
D1
MXL1543
R3
R2
R1
D3
D2
D1
MXL1344A
18
LL A (141)
13 5 10 8
CTS A (106)
CTS B
DSR A (109)
DSR B
22 6
DCD A (107)
DCD B
23 20 19 4
DTR A (108)
DTR B
RTS A (105)
RTS B
1
7
16 3
RXD A (104)
RXD B
9 17
RXC A (115)
RXC B
12 15 11 24 14 2
TXC A (114)
TXC B
SCTE A (113)
SCTE B
TXD A (103)
TXD B
DB-25 CONNECTOR
________________________________________________________________
Maxim Integrated Products
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim鈥檚 website at www.maxim-ic.com.
SG (102)
SHIELD (101)
1

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