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PDF SP3249E Data sheet ( Hoja de datos )
| Número de pieza | SP3249E | |
| Descripción | Intelligent +3.0V to +5.5V RS-232 Transceiver | |
| Fabricantes | Exar | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SP3249E (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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SP3249E
Intelligent +3.0V to +5.5V RS-232 Transceiver
FEATURES
■ Meets true EIA/TIA-232-F Standards
from a +3.0V to +5.5V power supply
■ Interoperable with EIA/TIA-232 and
adheres to EIA/TIA-562 down to a +2.7V
power source
■ Minimum 250Kbps data rate under load
■ Regulated Charge Pump Yields Stable
RS-232 Outputs Regardless of VCC
Variations
■ Enhanced ESD Specifications:
+15kV Human Body Model
+15kV IEC61000-4-2 Air Discharge
+8kV IEC61000-4-2 Contact Discharge
C2+ 1
GND 2
C2- 3
V- 4
T1OUT 5
T2OUT 6
T3OUT 7
R1IN 8
R2IN 9
T4OUT 10
R3IN 11
T5OUT 12
SP3249E
24 C1+
23 V+
22 VCC
21 C1-
20 T1IN
19 T2IN
18 T3 IN
17 R1OUT
16 R2OUT
15 T4IN
14 R3OUT
13 T5IN
Now Available in Lead Free Packaging
DESCRIPTION
The SP3249E device is an RS-232 transceiver solution intended for portable or hand-held applications
such as notebook and palmtop computers. The SP3249E uses an internal high-efficiency, charge-pump
power supply that requires only 0.1µF capacitors in 3.3V operation. This charge pump and Exar's
driver architecture allow the SP3249E device to deliver compliant RS-232 performance from a single
power supply ranging from +3.0V to +5.5V. The SP3249E is a 5-driver / 3-receiver device that is ideal
for laptop / notebook computer and PDA applications.
Device
SP3223E
SP3243E
SP3238E
SP3239E
SP3249E
Power
Supplies
+3.0V to +5.5V
+3.0V to +5.5V
+3.0V to +5.5V
+3.0V to +5.5V
+3.0V to +5.5V
RS-232
Drivers
2
3
5
5
5
RS-232
Receivers
2
5
3
3
3
External
Components
4 Capacitors
4 Capacitors
4 Capacitors
4 Capacitors
4 Capacitors
Auto
On-Line
Circuitry
YES
YES
YES
NO
NO
SELECTION TABLE
TTL 3-State
# of
Pins
YES
YES
YES
YES
NO
20
28
28
28
24
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3249E_100_013111
1 page  
NAME
C2+
GND
C2-
V-
T1OUT
T2OUT
T3OUT
R1IN
R2IN
T4OUT
R3IN
T5OUT
T5IN
R3OUT
T4IN
R2OUT
R1OUT
T3IN
T2IN
T1IN
C1-
Vcc
V+
C1+
FUNCTION
Positive terminal of the symmetrical charge-pump capacitor C2.
Ground.
Negative terminal of the symmetrical charge-pump capacitor C2.
Regulated -5.5V output generated by the charge pump.
RS-232 Driver Output.
RS-232 Driver Output.
RS-232 Driver Output.
RS-232 receiver input.
RS-232 receiver input.
RS-232 Driver Output.
RS-232 receiver input.
RS-232 Driver Output.
TTL/CMOS driver input.
TTL/CMOS receiver output.
TTL/CMOS driver input.
TTL/CMOS receiver output.
TTL/CMOS receiver output.
TTL/CMOS driver input.
TTL/CMOS driver input.
TTL/CMOS driver input.
Negative terminal of the symmetrical charge-pump capacitor C1.
+3.0V to +5.5V supply voltage.
Regulated +5.5V output generated by the charge pump.
Positive terminal of the symmetrical charge-pump capacitor C1.
Table 1. Device Pin Description
PIN NUMBER
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3249E_100_013111
5 Page 
VCC
+
C5 0.1µF
+ 24 C1+
C1 0.1µF
21 C1-
+ 1 C2+
C2 0.1µF
3 C2-
22
VCC
SP3249E
V+ 23
+
C3 0.1µF
V- 4
C4 0.1µF
+
17 R1OUT
R1IN 8
16 R2OUT
5kΩ
R2IN 9
14 R3OUT
5kΩ
R3IN 11
5kΩ
20 T1IN
T1OUT 5
19 T2IN
T2OUT 6
18 T3IN
T3OUT 7
15 T4IN
T4OUT 10
13 T5IN
T5OUT 12
DB-9
Connector
GND
2
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)
6
7
8
9
1
2
3
4
5
Figure 15. Circuit for the connectivity of the SP3249E with a DB-9 connector
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
11
SP3249E_100_013111
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet SP3249E.PDF ] | |
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