MAX3170CAI Datasheet MAX3170CAI+T, MAX3170CAI | P1-P3

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

Features

♦ Industry’s First +3.3V Single-Supply Transceiver

♦ 3V/5V Logic-Compatible I/O

♦ Certified TBR-1 and TBR-2 Compliant (NET1 and

NET2)—Pending Completion

♦ Supports V.28 (RS-232), V.11 (RS-449/V.36,

EIA530, EIA530-A, X.21), and V.35 Protocols

♦ Software-Selectable DTE/DCE

♦ Complete DTE/DCE Port with MAX3171/MAX3173

and MAX3172/MAX3174

♦ True Fail-Safe Receiver Operation

♦ Available in Small 28-Pin SSOP Package

♦ 10Mbps Operation (V.11/V.35)

♦ Requires Only Four Tiny Surface-Mount

Capacitors

♦ All Transmitter Outputs Are Fault Protected to

±15V to Survive Cable Miswiring

MAX3170

+3.3V, Multiprotocol, 3 Tx/3 Rx, Software-

Selectable Clock/Data Transceiver

________________________________________________________________ Maxim Integrated Products 1

19-1703; Rev 0; 4/00

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

Ordering Information

PART TEMP. RANGE PIN-PACKAGE

MAX3170CAI 0°C to +70°C 28 SSOP

Pin Configuration appears at end of data sheet.

D1D2

R2R3

MAX3170

RXD RXC TXDTXC SCTE

R2R3

MAX3171

MAX3173

MAX3172

MAX3174

CTS DSR RTSDTR LLDCD

CTS B

CTS A

DSR B

DSR A

DCD B

DCD A

DTR B

DTR A

RTS B

RTS A

SHIELD

LL A

RXD A

RXD B

RXC B

RXC A

TXC B

TXC A

SCTE B

SCTE A

TXD B

TXD A

DB-25 CONNECTOR

13 5 10 8 22 6 23 20 19 4 1 7 1618 3 9 17 12 15 11 24 14 2

Typical Operating Circuit

MAX3170

+3.3V, Multiprotocol, 3 Tx/3 Rx, Software-

Selectable Clock/Data Transceiver

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= +3.3V ±5%, C1 = C2 = 1µF, C3 = C4 = 3.3µF, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C

and V

= +3.3V.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.

(All voltages referenced to GND unless otherwise noted.)

Supply Voltages

......................................................................-0.3V to +4V

V+ (Note 1) ..........................................................-0.3V to +7V

V- (Note 1) ...........................................................+0.3V to -7V

V+ to V- (Note 1) ...............................................................13V

Logic Input Voltages

M0, M1, M2, DCE/DTE, T_IN ...............................-0.3V to +6V

Logic Output Voltages

R_OUT...................................................-0.3V to (V

+ 0.3V)

Short-Circuit Duration............................................Continuous

Transmitter Outputs

T_OUT_...............................................................-15V to +15V

Short-Circuit Duration ........................................................60s

Receiver Inputs

R_IN_ ..................................................................-15V to +15V

Continuous Power Dissipation (T

= +70°C)

28-Pin SSOP (derate 11.1mW/°C above +70°C) ........889mW

Operating Temperature Range

MAX3170CAI .....................................................0°C to +70°C

Storage Temperature Range ............................-65°C to +150°C

Lead Temperature (soldering, 10s) ................................+300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DC CHARACTERISTICS

V.11 mode

190

250

V.11 mode with no load

V.35 mode

160

210

V.35 mode with no load

V.28 mode

V.28 mode with no load

Supply Current (DCE Mode)

(Digital Inputs = GND or V

)

(All Outputs Static)

No-cable mode

0.8

V.11 mode, full load

410

V.35 mode, full load

510

Internal Power Dissipation

(DCE Mode)

V.28 mode, full load

V.11 mode

V.35 mode

4.25

V.28 mode

5.55

V+ Output Voltage (DCE Mode)

(Full Load)

V+

No-cable mode

V.11 mode

-4.1

V.35 mode

-3.7

V.28 mode

-5.45

V- Output Voltage (DCE Mode)

(Full Load)

V-

No-cable mode

-4.25

Charge-Pump Enable Time

Delay until V+ and V- specifications met

LOGIC INPUTS (M0, M1, M2, DCE/DTE, T_IN)

Input High Voltage

2.0

Input Low Voltage

0.8

T_IN

±1

M0, M1, M2, DCE/DTE = V

±1

Logic Input Current

M0, M1, M2, DCE/DTE = GND

100

µA

MAX3170

+3.3V, Multiprotocol, 3 Tx/3 Rx, Software-

Selectable Clock/Data Transceiver

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= +3.3V ±5%, C1 = C2 = 1µF, C3 = C4 = 3.3µF, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C

and V

= +3.3V.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LOGIC OUTPUTS (R_OUT)

Output High Voltage V

SOURCE

= 1.0mA V

- 1.0 V

Output Low Voltage V

SINK

= 1.6mA 0.4 V

Rise or Fall Time t

, t

10% to 90% 15 ns

R_OUT = GND 30 50 100

Output Leakage Current

(Receiver Output Tristated)

R_OUT = V

±1

µA

TRANSMITTER OUTPUTS

Output Leakage Current I

-0.25V < V

OUT

< +0.25V power-off or

no-cable mode

±100 µA

V.11/ V.35 mode 10 Mbps

Data Rate

V.28 mode 240 kbps

RECEIVER INPUTS

-10V < V

A,B

< +10V, V

or V

grounded

(V.11/V.35/no-cable mode)

20 40

Receiver Input Resistance R

-15V < V

< +15V (V.28 mode) 3 5 7

kΩ

V.11/ V.35 mode 10 Mbps

Data Rate

V.28 mode 240 kbps

V.11 TRANSMITTER

Unloaded Differential Output

Voltage

ODO

R = 1.95kΩ, Figure 1 4.0 6.0 V

Loaded Differential Output

Voltage

ODL

R = 50Ω, Figure 1

2.0

0.5 x V

OD O

C hang e i n M ag ni tud e of O utp ut

∆V

R = 50Ω, Figure 1 0.2 V

C om m on- M od e O utp ut V ol tag e V

R = 50Ω, Figure 1 3.0 V

C hang e i n M ag ni tud e of O utp ut

C om m on- M od e V ol tag e

∆V

R = 50Ω, Figure 1 0.2 V

Short-Circuit Current I

OUT

= GND 60 150 mA

Rise or Fall Time t

, t

10% to 90%, Figure 2 10 25 ns

Transmitter Input to Output t

PHL

, t

PLH

Figure 2 50 80 ns

Data Skew |t

PHL

- t

PLH

| Figure 2 2 10 ns

Output-to-Output Skew t

SKEW

Figure 2 2 ns

Channel-to-Channel Output

2 ns

V.11 RECEIVER

Differential Threshold Voltage V

-7V < V

< +7V -200 -100 -25 mV

Input Hysteresis ∆V

-7V < V

< +7V 15 mV

Receiver Input to Output t

PHL

, t

PLH

= 0, Figure 2 60 120 ns

Data Skew |t

PHL

- t

PLH

| V

= 0, Figure 2

5 16

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MAX3170CAI

Mfr. #:

Buy MAX3170CAI

Manufacturer:

Maxim Integrated

Description:

RS-232 Interface IC +3.3V, Multiprotocol, 3 Tx/3 Rx, Software-Selectable Clock/Data Transceiver

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MAX3170CAI

MAX3170CAI

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