MAX3172, MAX3174 +3.3V Multiprotocol Software-Selectable Cable Terminators and Transceivers

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The MAX3172/MAX3174 contain five software-selectable multiprotocol 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 transceivers having on-chip termination. The devices replace discrete resistor termination networks and expensive relays required for multiprotocol termination. The MAX3172/MAX3174, along with the MAX3170 and MAX3171/MAX3173, form a complete +3.3V software-selectable DTE or DCE interface port supporting V.11/RS-422, RS-530, RS-530A, V.36/RS-449, V.35, V.28/RS-232, V.10/RS-423, and X.21 serial interfaces.

In addition to the five multiprotocol cable termination networks, the MAX3172/MAX3174 contain a 1Tx/1Rx multiprotocol transceiver designed to use V+ and V- generated by the MAX3171/MAX3173 charge pump. The MAX3172/MAX3174 transceiver is software selectable between V.10 and V.28 modes of operation. The MAX3172 features 10µs deglitching on the V.10/V.28 receiver input to facilitate unterminated operation while the MAX3174 is used in applications that do not require deglitching on the serial handshake signals. These devices are available in a 28-pin SSOP package.

Key Features

Applications/Uses

Industry's First +3.3V Multiprotocol Termination Networks and Transceiver
Certified TBR-1 and TBR-2 Compliant (NET1 and NET2)
Supports V.28 (RS-232), V.11 (RS-422, RS-530, RS530A, RS-449, V.36, and X.21) V.10 and V.35
3V/5V Logic-Compatible I/O
Software-Selectable DTE/DCE
Replaces Discrete Resistor Termination Networks and Expensive Relays
10µs Receiver Input Deglitching (MAX3172 only)
Available in Small 28-Pin SSOP Packages
Transmitter Output Fault Protected to ±15V, Tolerates Cable Miswiring

	CSUs/DSUs
	Data Networking
	Data Routers
	PCI Cards
	Telecommunications

Key Specifications: Multiprotocol Transceivers

Part Number

Functions

Max. RS-232 Data Rate (Mbps)

Max. RS-485 Data Rate (Mbps)

Number of Single Ended Tx/Rx

Number of Diff. Tx/Rx

Shutdown

Supported Protocols

DCE/DTE Interchangable

Rx Glitch Rejection

Tx Fault Protection

On-Chip Charge Pump

Max. Operating Supply Current (mA)

Shutdown-Mode Supply Current (µA)

Price^**

MAX3172

•	Multiprotocol Cable Terminator and Transceiver

0.24

1/1

Yes

RS-232
RS-423
RS-449
RS-485
RS-530
RS-530A
V.11
V.28
V.35
V.36
X.21

Yes

0.75

200

$6.05 @ 1k

MAX3174

RS-232
RS-449
RS-485
RS-530
RS-530A
V.10
V.11
V.28
V.35
X.21

$6.05 @ 1k

See All Multiprotocol Transceivers (15)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.