st3243eb STMicroelectronics, st3243eb Datasheet - Page 4

• Manufacturer Part Number: st3243eb
• Description: ?15 Kv Esd Protected 3 To 5.5 V, 400 Kbps, Rs-23 Transceiver With Auto-powerdown
• Manufacturer: STMicroelectronics

Table 1.
4/24
Pin n°
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1
2
3
4
5
6
7
8
9
Pin description (for SOP, SSOP and TSSOP)
FORCEOFF
FORCEON
INVALID
Symbol
R2
R5
R4
R3
R2
R1
T1
T2
T3
GND
R1
R2
R3
R4
R5
T3
T2
T1
V
C
C
C
C
V+
V-
OUTB
OUT
OUT
OUT
CC
2
OUT
OUT
OUT
OUT
OUT
1
2
1
IN
IN
IN
IN
IN
IN
IN
IN
+
+
-
-
Positive terminal of inverting charge pump capacitor
Negative terminal of inverting charge pump capacitor
-5.5 V Generated by the charge pump
First receiver input voltage
Second receiver input voltage
Third receiver input voltage
Fourth receiver input voltage
Fifth receiver input voltage
First transmitter output voltage
Second transmitter output voltage
Third transmitter output voltage
Third transmitter input voltage
Second transmitter input voltage
First transmitter input voltage
Fifth receiver output voltage
Fourth receiver output voltage
Third receiver output voltage
Second receiver output voltage
First receiver output voltage
Non-inverting complementary receiver output, always active
for wake-up
Output of the valid signal detector. Indicates if a valid RS-232
level is present on receiver inputs logic "1"
Drive low to shut down transmitters and on-board power
supply. This over-rides all automatic circuitry and FORCEON
Drive high to override automatic circuitry keeping transmitters
on (FORCEOFF must be high)
Negative terminal of voltage-charge pump capacitor
Ground
Supply voltage
5.5 V Generated by the charge pump
Positive terminal of voltage-charge pump capacitor
Name and function