SP3243E EXAR [Exar Corporation], SP3243E Datasheet - Page 6

• Manufacturer Part Number: SP3243E
• Description: 3 Driver/5 Receiver Intelligent +3.0V to +5.5V RS-232 Transceivers
• Manufacturer: EXAR [Exar Corporation]

Table 1. Device Pin Description
NAME
C1+
V+
C1-
C2+
C2-
V-
R
R
R
R
R
R
R
R
R
R
R
STATUS
T
T
T
ONLINE
T1
T2
T3
GND
V
SHUTDOWN
NC
1
2
3
1
2
3
4
5
1
2
2
3
4
5
CC
IN
IN
IN
IN
IN
IN
IN
IN
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
FUNCTION
Positive terminal of the voltage doubler charge-pump capacitor
Regulated +5.5V output generated by the 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 the charge pump
RS-232 receiver input.
RS-232 receiver input
RS-232 receiver input
RS-232 receiver input
RS-232 receiver input
TTL/CMOS receiver output
TTL/CMOS receiver output
Non-inverting receiver-2 output, active in shutdown
TTL/CMOS receiver output
TTL/CMOS receiver output
TTL/CMOS receiver output
TTL/CMOS Output indicating online and shutdown status
TTL/CMOS driver input
TTL/CMOS driver input
TTL/CMOS driver input
Apply logic HIGH to override AUTO ON-LINE® circuitry
keeping drivers acive (SHUTDOWN must also be logic
HIGH, refer to Table 2)
RS-232 driver output
RS-232 driver output
RS-232 driver output
Ground
+3.0V to +5.5V supply voltage
Apply logic LOW to SHUTDOWN driver and charge pump.
This overrides all AUTO ON-LINE® circuitry and ONLINE
(Refer to table 2)
No Connection
6
SP3243E
28
27
24
19
18
20
17
16
15
21
14
13
12
23
10
25
26
22
11
1
2
3
4
5
6
7
8
9
-
PIN NUMBER
SP3243E_100_072309
SP3243EUCR
1,24,27,30
QFN
28
26
22
29
31
32
17
16
18
15
14
13
19
12
10
21
23
25
20
11
2
3
4
5
6
7
8
9