ST3243ECTR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST3243ECTR

±15KV ESD PROTECTED 3 TO 5.5V, 400KBPS, RS-232 TRANSCEIVER WITH AUTO-POWERDOWN

STMicroelectronics 

PIN DESCRIPTION

PlN N°

A1

A2

A3

A4

A5

A6

B1

B2

B3

B4

B5

B6

C1

C2

C5

C6

D1

D2

D3

D4

D5

D6

E1

E2

E3

E4

E5

E6

ST3243E

SYMBOL

R2IN

R3IN

R4IN

R5IN

T1OUT

T2OUT

V-

R1IN

T3OUT

T3IN

T1IN

T2IN

C2+

C2-

R4OUT

R5OUT

C1+

V+

VCC

FORCEON

R1OUT

R3OUT

GND

C1-

FORCEOFF

INVALID

R2OUTB

R2OUT

NAME AND FUNCTION

Second Receiver Input Voltage

Third Receiver Input Voltage

Fourth Receiver Input Voltage

Fifth Receiver Input Voltage

First Transmitter Output Voltage

Second Transmitter Output Voltage

-5.5V Generated by the Charge Pump

First Receiver Input Voltage

Third Transmitter Output Voltage

Third Transmitter Input Voltage

First Transmitter Input Voltage

Second Transmitter Input Voltage

Positive Terminal of Inverting Charge Pump Capacitor

Negative Terminal of Inverting Charge Pump Capacitor

Fourth Receiver Output Voltage

Fifth Receiver Output Voltage

Positive Terminal of Voltage- Charge Pump Capacitor

5.5V Generated by the Charge Pump

Supply Voltage

Drive high to override automatic circuitry keeping transmitters

on (FORCEOFF must be high)

First Receiver Output Voltage

Third Receiver Output Voltage

Ground

Negative Terminal of Voltage- Charge Pump Capacitor

Drive low to shut down transmitters and on-board power

supply. This over-rides all automatic circuitry and FORCEON

Output of the valid signal detector. Indicates if a valid RS-232

level is present on receiver inputs logic "1"

Non-inverting Complementary Receiver Output, always active

for wake-up

Second Receiver Output Voltage

3/18

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