SP3223ECY-L-TR Datasheet, PDF (8/21 Pages) Exar Corporation – Intelligent +3.0V to +5.5V RS-232 Transceivers

PIN DESCRIPTION
Name
EN
C1+
V+
C1-
C2+
C2-
V-
T₂OUT
R₂IN
R₂OUT
STATUS
T₂IN
T₁IN
ONLINE
R₁OUT
R₁IN
T₁OUT
GND
Vcc
SHUTDOWN
Function
Receiver Enable, Apply logic LOW for normal operation. Apply logic HIGH to
disable receiver outputs (high-Z state).
Positive terminal of the voltage doubler charge-pump capacitor
Regulated +5.5V output generated by charge pump
Negative terminal of the voltage doubler charge-pump capacitor
Positive terminal of the inverting charge-pump capacitor
Negative terminal of the inverting charge-pump capacitor
Regulated -5.5V output generated by charge pump
RS-232 Driver output
RS-232 receiver input
TTL/CMOS receiver output
TTL/CMOS output indicating online and shutdown status
TTL/CMOS driver input
TTL/CMOS driver input
Apply logic HIGH to override AUTO ON-LINE ® circuitry keeping drivers active
(SHUTDOWN must also be logic HIGH, refer to table 2).
TTL/CMOS receiver output
RS-232 receiver input
RS-232 Driver output
Ground
+3.0V to +5.5V supply voltage
Apply logic LOW to shut down drivers and charge pump. This overrides all
AUTO ON-LINE ® circuitry and ONLINE (refer to table 2).
Table 2. Pin Description
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • [phone] • www.exar.com

SP3223E/EB/EU_101_062712