MAX3171CAI View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX3171CAI

+3.3V Multiprotocol 3Tx/3Rx Software-Selectable Control Transceivers

Maxim Integrated 

+3.3V Multiprotocol 3Tx/3Rx

Software-Selectable Control Transceiver

Test Circuits (continued)

Tx

Tx

Rx

CL

RL

50pF

Figure 3. V.10/V.28 Driver Test Circuit

Figure 4. V.10/V.28 Receiver Test Circuit

PIN

1

2

3

4

5, 6, 7

8, 9, 10

11, 12, 13

14

15, 18

16, 17

19

20

21, 23

22, 24

25

26

27

28

NAME

V+

C2+

C2-

V-

T_IN

R_OUT

M_

DCE/DTE

R_INB

R_INA

T3OUTB/R1INB

T3OUTA/R1INA

T_OUTB

T_OUTA

C1-

GND

Pin Description

FUNCTION

Positive Supply Generated by the Charge Pump (connect to V+ pin of MAX3172/MAX3174).

Bypass V+ to ground with a 3.3µF ceramic capacitor.

Positive Terminal of the Inverting Charge-Pump Capacitor. Connect C2+ to C2- with a 1µF

ceramic capacitor.

Negative Terminal of the Inverting Charge-Pump Capacitor. Connect C2+ to C2- with a 1µF

ceramic capacitor.

Negative Supply Generated by the Charge Pump (connect to V- pin of MAX3172/MAX3174).

Bypass V- to ground with a 3.3µF ceramic capacitor.

Transmitter CMOS Inputs (T1IN, T2IN, T3IN)

Receiver CMOS Outputs (R1OUT, R2OUT, R3OUT)

Mode Select Inputs (M0, M1, M2). Internally pulled up to VCC. See Table 1 for detailed

information.

DCE/DTE Mode Select Input. Logic level high selects DCE interface; logic level low selects

DTE interface. Internally pulled up to VCC.

Noninverting Receiver Inputs (R3INB, R2INB)

Inverting Receiver Inputs (R3INA, R2INA)

Noninverting Transmitter Output/Noninverting Receiver Input

Inverting Transmitter Output/Inverting Receiver Input

Noninverting Transmitter Outputs (T2OUTB, T1OUTB)

Inverting Transmitter Outputs (T2OUTA, T1OUTA)

Negative Terminal of the Voltage-Doubler Charge-Pump Capacitor. Connect C1+ to C1- with

a 1µF ceramic capacitor.

Ground

VCC

+3.3V Supply Voltage (±5%). Bypass VCC to ground with a 3.3µF ceramic capacitor.

C1+

Positive Terminal of the Voltage-Doubler Charge-Pump Capacitor. Connect C1+ to C1- with a

1µF ceramic capacitor.

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