Maxim MAX3170CAI Datasheet

General Description

The MAX3170 is a three-driver/three-receiver multiprotocol transceiver that operates from a +3.3V single supply. The MAX3170, along with the MAX3171/MAX3173 and MAX3172/MAX3174, form a complete softwareselectable data terminal equipment (DTE) or data communications 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 signals, while the MAX3171 or MAX3173 carries the control signals. The MAX3170 can be terminated by the MAX3172 or MAX3174 software-selectable resistor termination 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.35compliant operation from a +3.3V single supply. A nocable mode is entered when all mode pins (M0, M1, and M2) are pulled high or left unconnected. In nocable mode, supply current decreases to 1mA and all transmitter and receiver outputs are disabled (high impedance). Short-circuit limiting and thermal shutdown 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

Pin Configuration appears at end of data sheet.

Typical Operating Circuit

PART TEMP. RANGE PIN-PACKAGE

MAX3170CAI 0°C to +70°C 28 SSOP

CTS DSR RTSDTR LLDCD

MAX3171 MAX3173

R2R3

13 5 10 8 22 6 23 20 19 4 1 7 1618 3 9 17 1215 11 24 14 2

CTS B

CTS A

DSR B

DSR A

D3

R1

DCD B

DCD A

D2

DTR B

DTR A

D1

RTS B

RTS A

SHIELD

MAX3172 MAX3174

R4

SG

DB-25 CONNECTOR

D4

RXD RXC TXDTXC SCTE

R1

R2R3

LL A

RXD A

RXD B

RXC B

RXC A

D3

TXC B

TXC A

SCTE B

SCTE A

D1D2

TXD B

MAX3170

TXD A

MAX3170

+3.3V, Multiprotocol, 3 Tx/3 Rx, SoftwareSelectable Clock/Data Transceiver

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

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

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C

and V

CC

= +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

V

CC

......................................................................-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

CC

+ 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

A

= +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

DC CHARACTERISTICS

Supply Current (DCE Mode) (Digital Inputs = GND or V (All Outputs Static)

Internal Power Dissipation (DCE Mode)

V+ Output Voltage (DCE Mode) (Full Load)

V- Output Voltage (DCE Mode) (Full Load)

Charge-Pump Enable Time

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

Input High Voltage

Input Low Voltage

Logic Input Current

CC

)

SYMBOL

I

CC

P

D

V+

V-

V

IH

V

IL

I

IN

I

IH

I

IL

V.11 mode

V.11 mode with no load

V.35 mode

V.35 mode with no load

V.28 mode

V.28 mode with no load

No-cable mode

V.11 mode, full load

V.35 mode, full load

V.28 mode, full load

V.11 mode

V.35 mode

V.28 mode

No-cable mode

V.11 mode

V.35 mode

V.28 mode

No-cable mode

Delay until V+ and V- specifications met

T_IN M0, M1, M2, DCE/DTE = V

M0, M1, M2, DCE/DTE = GND

CONDITIONS

MIN TYP MAX UNITS

190

3

160

20 10 4

0.8

410

510

15

4

4.25

5.55

5

-4.25

1

2.0

CC

30

50

250

7

210

40

20

7

2

-4.1

-3.7

-5.45

0.8

±1

100

mA

mW

V

ms

V

µA

MAX3170

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

Selectable Clock/Data Transceiver

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

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

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C

and V

CC

= +3.3V.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS LOGIC OUTPUTS (R_OUT) Output High Voltage V Output Low Voltage V Rise or Fall Time t Output Leakage Current

(Receiver Output Tristated)

OH

OL

, t

r

I I 10% to 90% 15 ns

f

= 1.0mA VCC - 1.0 V

SOURCE

= 1.6mA 0.4 V

SINK

R_OUT = GND 30 50 100

R_OUT = V

CC

±1

µA

TRANSMITTER OUTPUTS

Output Leakage Current I

Data Rate

Z

-0.25V < V

no-cable mode

V.11/ V.35 mode 10 Mbps

V.28 mode 240 kbps

< +0.25V power-off or

OUT

±100 µA

RECEIVER INPUTS

Receiver Input Resistance R

Data Rate

-10V < V

IN

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

-15V < V V.11/ V.35 mode 10 Mbps

V.28 mode 240 kbps

< +10V, VA or VB grounded

A,B

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

A

20 40

kΩ

V.11 TRANSMITTER Unloaded Differential Output

Voltage

V

ODO

R = 1.95kΩ, Figure 1 4.0 6.0 V

Loaded Differential Output

Voltage

C hang e i n M ag ni tud e of O utp ut C om m on- M od e O utp ut V ol tag e 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

Short-Circuit Current I Rise or Fall Time t Transmitter Input to Output t Data Skew |t

PHL

Output-to-Output Skew t Channel-to-Channel Output

V

ODL

∆V

OD

OC

∆V

OC

SC

, t

r

, t

- t

SKEW

R = 50Ω, Figure 1

R = 50Ω, Figure 1 0.2 V R = 50Ω, Figure 1 3.0 V

R = 50Ω, Figure 1 0.2 V

V

= GND 60 150 mA

OUT

10% to 90%, Figure 2 10 25 ns

f

Figure 2 50 80 ns

PLH

| Figure 2 2 10 ns

PLH

Figure 2 2 ns 2 ns

2.0

0.5 x V

OD O

V

V.11 RECEIVER Differential Threshold Voltage V Input Hysteresis ∆V Receiver Input to Output t Data Skew |t

PHL

TH

, t

- t

-7V < V

CM

-7V < V

CM

PLH VCM

PLH

= 0, Figure 2 60 120 ns

| VCM = 0, Figure 2

< +7V -200 -100 -25 mV < +7V 15 mV

5 16

ns

MAX3170

+3.3V, Multiprotocol, 3 Tx/3 Rx, SoftwareSelectable Clock/Data Transceiver

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

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

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C

and V

CC

= +3.3V.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V.35 TRANSMITTER Differential Output Voltage -4V < V Output High Current I Output Low Current I Rise or Fall Time t Transmitter Input to Output t Data Skew |t

PHL

OH

OL

, t

r

, t

- t

f

PLH

| Figure 3 5 10 ns

CM

V

= 0 9 11 13 mA

A, B

V

= 0 -13 -11 -9 mA

A, B

10% to 90%, Figure 3 10 ns Figure 3 50 80 ns

Output-to-Output Skew Figure 3 2 ns C hannel- to-C hannel Output Skew 2 ns V.35 RECEIVER Differential Input Voltage V Input Hysteresis ∆V Receiver Input to Output t Data Skew

|t

PHL

TH

, t

- t

-4V < V

PLH VCM

V

|

PLH

CM

= 0 70 120 ns = 0 5 16 ns

V.28 TRANSMITTER

Output Voltage Swing V

Short-Circuit Current I

SC

Output Slew Rate SR

Transmitter Input to Output t Data Skew

|t

PHL

- t

O

, t

All transmitters loaded with R No load ±6.5

±25 ±60 mA R

= 3kΩ, CL = 2500pF, measured from

L

+3V to -3V or -3V to +3V, Figure 4

R

= 7kΩ, CL = 150pF, measured from

L

+3V to -3V or -3V to +3V, Figure 4

Figure 4 1 µs

PLH

Figure 4 100 ns

|

PLH

V.28 RECEIVER Input Threshold Low V Input Threshold High V Input Hysteresis V Data Skew |t

PHL

IL

IH

HYS

- t

Figure 5 0.8 1.1 V Figure 5 1.6 2.0 V

| Figure 5 100 ns

PLH

< +4V, Figure 3 0.44 0.55 0.66 V

< +4V, Figure 3 -200 -100 -25 mV < +4V, Figure 3 15 mV

= 3kΩ

L

±5.0 ±5.4

4 30

6 30

0.5 V

V

V/µs

MAX3170

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

Selectable Clock/Data Transceiver

_______________________________________________________________________________________ 5

Typical Operating Characteristics

(VCC= +3.3V, C1 = C2 = 1.0µF, C3 = C4 = 3.3µF, TA= +25°C, unless otherwise noted.)

V.11 SUPPLY CURRENT

vs. DATA RATE

250

DCE MODE, R = 50Ω ALL TRANSMITTERS OPERATING AT SPECIFIED RATE

200

150

100

V.11 SUPPLY CURRENT (mA)

50

0

0.1 101 100 1000 10,000 DATA RATE (kbps)

V.11 DRIVER DIFFERENTIAL OUTPUT

VOLTAGE vs. TEMPERATURE

4

DCE MODE, R = 50Ω

3

2

1

0

-1

-2

-3

DRIVER DIFFERENTIAL OUTPUT VOLTAGE (V)

-4

-40 0-20 20 40 60 80

TEMPERATURE (°C)

V

OH

V

OL

100

MAX3170-01

80

60

40

V.28 SUPPLY CURRENT (mA)

20

0

8 7 6

MAX3170-04

5 4 3 2 1 0

-1

-2

-3

OUTPUT VOLTAGE (V)

-4

-5

-6

-7

-8

V.28 SUPPLY CURRENT

vs. DATA RATE

DCE MODE, ALL TRANSMITTERS OPERATING AT THE SPECIFIED DATA RATE

= 3kΩ, CL = 2000pF

R

L

0 10050 150 200 250

DATA RATE (kbps)

V.28 OUTPUT VOLTAGE

vs. TEMPERATURE

DCE MODE, R = 3kΩ

-40 0-20 20 40 60 80 TEMPERATURE (°C)

VOUT+

VOUT-

200

DCE MODE, VCM = 0

MAX3170-02

ALL TRANSMITTERS OPERATING AT SPECIFIED RATE

150

100

50

V.35 SUPPLY CURRENT (mA)

0

0.1 101 100 1000

V.35 DIFFERENTIAL OUTPUT VOLTAGE

0.66

MAX3170-05

DCE MODE, VCM = 0

0.44

0.22

0

-0.22

-0.44

DIFFERENTIAL OUTPUT VOLTAGE (V)

-0.66

-40 20 40-20 0 60 80

V.35 SUPPLY CURRENT

vs. DATA RATE

DATA RATE (kbps)

vs. TEMPERATURE

V

OH

V

OL

TEMPERATURE (°C)

MAX3170-03

10,000

MAX3170-06

V.35 DIFFERENTIAL OUTPUT VOLTAGE

vs. COMMON-MODE VOLTAGE

570

560

V

550

540

530

DIFFERENTIAL OUTPUT VOLTAGE (V)

520

-4 -2 -1-3 01234

OH

VCM (V)

V.11/V.35 RECEIVER INPUT CURRENT

300

DCE MODE

MAX3170-07

200

100

0

-100

RECEIVER INPUT CURRENT (µA)

-200

-300

-10 -2-4-8-6 0246810

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

2.5 DCE MODE

2.0

MAX3170-08

1.5

1.0

0.5

0

-0.5

-1.0

RECEIVER INPUT CURRENT (mA)

-1.5

-2.0

-2.5

-10 -6 -4 -2-8 024 8610

V.28 RECEIVER INPUT CURRENT

vs. INPUT VOLTAGE

MAX3170-09

INPUT VOLTAGE (V)