MAX3170 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – +3.3V, Multiprotocol, 3 Tx/3 Rx, Software- Selectable Clock/Data Transceiver

19-1703; Rev 0; 4/00
+3.3V, Multiprotocol, 3 Tx/3 Rx, Software-
Selectable Clock/Data Transceiver
General Description
The MAX3170 is a three-driver/three-receiver multipro-
tocol transceiver that operates from a +3.3V single sup-
ply. The MAX3170, along with the MAX3171/MAX3173
and MAX3172/MAX3174, form a complete software-
selectable data terminal equipment (DTE) or data com-
munications equipment (DCE) interface port that
supports the V.28 (RS-232), V.11 (RS-449/V.36, EIA530,
EIA530-A, X.21), and V.35 protocols. The MAX3170
transceiver carries the high-speed clock and data sig-
nals, while the MAX3171 or MAX3173 carries the con-
trol signals. The MAX3170 can be terminated by the
MAX3172 or MAX3174 software-selectable resistor ter-
mination network or by a discrete termination network.
An internal charge pump and proprietary low-dropout
transmitter output stage allow V.11-, V.28-, and V.35-
compliant operation from a +3.3V 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 1mA and all
transmitter and receiver outputs are disabled (high
impedance). Short-circuit limiting and thermal shut-
down circuitry protect the drivers against excessive
power dissipation.
________________________Applications
Data Networking PCI Cards
CSU and DSU
Telecommunications
Data Routers
CTS DSR
DCD DTR RTS
LL
Features
o Industry’s First +3.3V Single-Supply Transceiver
o 3V/5V Logic-Compatible I/O
o Certified TBR-1 and TBR-2 Compliant (NET1 and
NET2)—Pending Completion
o Supports V.28 (RS-232), V.11 (RS-449/V.36,
EIA530, EIA530-A, X.21), and V.35 Protocols
o Software-Selectable DTE/DCE
o Complete DTE/DCE Port with MAX3171/MAX3173
and MAX3172/MAX3174
o True Fail-Safe Receiver Operation
o Available in Small 28-Pin SSOP Package
o 10Mbps Operation (V.11/V.35)
o Requires Only Four Tiny Surface-Mount
Capacitors
o All Transmitter Outputs Are Fault Protected to
±15V to Survive Cable Miswiring
Ordering Information
PART
MAX3170CAI
TEMP. RANGE
0°C to +70°C
PIN-PACKAGE
28 SSOP
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
RXD RXC
TXC SCTE TXD
MAX3171 _{R3 R2 R1}
MAX3173
D3 D2 D1
MAX3172
MAX3174
R3 R2 R1
D3 D2 D1
MAX3170
R4
D4
13 5 10 8
22 6 23 20 19 4
1
7
DB-25 CONNECTOR
18 16 3 9 17
12 15 11 24 14 2
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