SP3249 查看數據表（PDF） - Signal Processing Technologies

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SP3249

Intelligent +3.0V to +5.5V RS-232 Transceivers

Signal Processing Technologies 

VCC = +5V

+

C1 –

–5V

+5V

+

C2 –

–5V

C4

+ – VDD Storage Capacitor

– + VSS Storage Capacitor

C3

Figure 13. Charge Pump — Phase 3

VCC = +5V

+

C1 –

+10V

+

C2 –

C4

+ – VDD Storage Capacitor

– + VSS Storage Capacitor

C3

Figure 14. Charge Pump — Phase 4

VCC

+

C5 0.1µF

22

24

VCC

+

C1+

C1 0.1µF

21 C1-

V+

+

1 C2+ SP3249E

C2 0.1µF

3 C2-

V-

17 R1OUT

16 R2OUT

14 R3OUT

20 T1IN

19 T2IN

18 T3IN

15 T4IN

13 T5IN

R1IN

5kΩ

R2IN

5kΩ

R3IN

5kΩ

T1OUT

T2OUT

T3OUT

T4OUT

T5OUT

23

+

C3 0.1µF

4

C4 0.1µF

+

8

9

11

5

6

7

10

12

DB-9

Connector

6

GND

7

8

2

9

DB-9 Connector Pins:

1. Received Line Signal Detector

2. Received Data

3. Transmitted Data

4. Data Terminal Ready

5. Signal Ground (Common)

6. DCE Ready

7. Request to Send

8. Clear to Send

9. Ring Indicator

Figure 15. Circuit for the connectivity of the SP3249E with a DB-9 connector

Rev.4/08/02

SP3249E Intelligent +3.0V to +5.5V RS-232 Transceivers

9

1

2

3

4

5

© Copyright 2002 Sipex Corporation

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