ST3222EB View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST3222EB

± 15 kV ESD protected, 3 to 5.5 V low power, up to 250 Kbps, RS-232 drivers and receivers

STMicroelectronics 

ST3222E

1

Pin configuration

Figure 1. Pin connection

Pin configuration

Table 2.

Pin n°

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Pin description

Symbol

Name and function

EN

C1+

V+

C1-

C2+

C2-

V-

T2OUT

R2IN

R2OUT

NC

T2IN

T1IN

NC

R1OUT

R1IN

T1OUT

GND

VCC

SHDN

Receiver enable control. drive low for normal operation. Drive high to force the

receivers outputs (R_OUT) into a high-impedance state.

Positive terminal for the first charge pump capacitor

5.5V Generated by the charge pump.

Negative terminal for the first charge pump capacitor

Positive terminal for the second charge pump capacitor

Negative terminal for the second charge pump capacitor

-5.5V Generated by the charge pump.

Second transmitter output voltage

Second receiver input voltage

Second receiver output voltage

Not connected

Second transmitter input voltage

First transmitter input voltage

Not connected

First receiver output voltage

First receiver input voltage

First transmitter output voltage

Ground

Supply voltage

Active low shutdown control input. drive low to shut-down transmitter and charge pump

3/15

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