SP3238EEY-L-TR Datasheet, PDF (11/21 Pages) Exar Corporation – Intelligent +3.0V to +5.5V RS-232 Transceiver

VCC
+
C5 0.1µF
26
VCC
+
28 _C1+
C1 0.1µF
25 _C1-
V+
1 _C2+ SP3238E
+
C2 0.1µF
3 _C2-
V-
16 ^R₁^OUT
21 ^R₁^OUT
R₁IN
20 ^R₂^OUT
5kΩ
R₂IN
18 ^R₃^OUT
5kΩ
R₃IN
5kΩ
24 ^T1^IN
T₁OUT
27
+
C3 0.1µF
4
C4 0.1µF
+
8
9
11
5
23 ^T₂^IN
T₂OUT ₆
22 ^T₃^IN
T₃OUT ₇
19 ^T₄^IN
T₄OUT ₁₀
17 ^T₅^IN
VCC
To µP Supervisor
Circuit
14 _SHUTDOWN
13 _ONLINE
15 _{STATUS GND}
2
T₅OUT ₁₂
DB-9 Connector Pins:
1. Received Line Signal Detector 6. DCE Ready
2. Received Data
7. Request to Send
3. Transmitted Data
8. Clear to Send
4. Data Terminal Ready
9. Ring Indicator
5. Signal Ground (Common)
DB-9
Connector
6
7
8
9
1
2
3
4
5
Figure 15. Circuit for the connectivity of the SP3238E with a DB-9 connector
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
11
SP3238E_100_020111