SP3243EBCA-L-TR Datasheet, PDF (7/25 Pages) Exar Corporation – 3 Driver/5 Receiver Intelligent +3.0V to +5.5V RS-232 Transceivers

+
C5 0.1µ F
28 _C1+
+
C1 0.1µ F
24 C1-
VCC
26
VCC
V+ ²⁷
1 C2+
+
C2 0.1µ F
2 C2-
14 ^T1^IN
TTL/CMOS
INPUTS
13 ^T2^IN
12 ^T3^IN
SP3243E V- ³
T₁OUT ₉
T₂OUT ₁₀
T₃OUT ₁₁
TTL/CMOS
OUTPUTS
VCC
To µ P Supervisor
Circuit
20 ^R2^OUT
19 ^R1^OUT
R₁IN ₄
18 ^R2^OUT
5kΩ
R₂IN ₅
17 ^R3^OUT
5kΩ
R₃IN ₆
16 ^R4^OUT
5kΩ
R₄IN ₇
15 ^R5^OUT
22 _SHUTDOWN
23 _ONLINE
5kΩ
R₅IN ₈
5kΩ
21 _STATUS
GND
25
+
C3 0.1µ F
C4 0.1µ F
+
RS-232
OUTPUTS
RS-232
INPUTS
Figure 8. SP3243E Typical Operating Circuit
NC 1
R1IN 2
R2IN 3
R3IN 4
R4 IN 5
R5 IN 6
T1OUT 7
T2OUT 8
SP3243E
24 NC
23 GND
22 C1-
21 ONLINE
20 SHUTDOWN
19 STATUS
18 R ₂OUT
17 R₁OUT
Figure 9. SP3243E QFN Pinout Configuration
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP3243E_102_060611