ST3241E_06 Datasheet, PDF (4/17 Pages) STMicroelectronics – ±15kV ESD Protected 3 to 5.5V, 400kbps, RS-232 transceiver with auto-powerdown

Pin configuration
ST3241E
Table 1. Pin description
Pin n°
Symbol
18
R2_OUT
19
R1_OUT
20
R2_OUTB
21
R1_OUTB
22
SHDN
23
EN
24
C₁-
25
GND
26
V_CC
27
V+
28
C₁+
Name and function
Second receiver output voltage
First receiver output voltage
Non-inverting complementary receiver output, always active for wake-up
Non-inverting complementary receiver output, always active for wake-up
Shutdown control. Active low.
Receiver enable. Active low
Negative terminal of voltage- charge pump capacitor
Ground
Supply voltage
5.5V Generated by the charge pump
Positive terminal of voltage- Charge pump capacitor
Table 2. Shutdown and enable control truth table
SHDN
EN
T_OUT
0
0
HIGH Z
0
1
HIGH Z
1
0
ACTIVE
1
1
ACTIVE
R_OUT
ACTIVE
HIGH Z
ACTIVE
HIGH Z
R_OUTB
ACTIVE
ACTIVE
ACTIVE
ACTIVE
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