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PDF SP3222E Data sheet ( Hoja de datos )
| Número de pieza | SP3222E | |
| Descripción | True +3.0V to +5.5V RS-232 Transceivers | |
| Fabricantes | Exar | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SP3222E (archivo pdf) en la parte inferior de esta página. Total 23 Páginas | ||
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SP3222E/SP3232E
True +3.0V to +5.5V RS-232 Transceivers
FEATURES
■ Meets true EIA/TIA-232-F Standards
from a +3.0V to +5.5V power supply
■ Minimum 120kbps Data Rate Under Full
Load
■ 1µA Low Power Shutdown with
Receivers active (SP3222E)
■ Interoperable with RS-232 down to a
+2.7V power source
■ Enhanced ESD Specifications:
+15kV Human Body Model
+15kV IEC61000-4-2 Air Discharge
+8kV IEC61000-4-2 Contact Discharge
EN 1
C1+ 2
V+ 3
C1- 4
C2+ 5
C2- 6
V- 7
T2OUT 8
R2IN 9
18 SHDN
17 VCC
16 GND
15 T1OUT
SP3222E 14 R1IN
13 R1OUT
12 T1IN
11 T2IN
10 R2OUT
nSOIC
Now Available in Lead Free Packaging
Note: See page 6 for other pinouts
DESCRIPTION
The SP3222E/SP3232E series is an RS-232 transceiver solution intended for portable or
hand-held applications such as notebook or palmtop computers. The SP3222E/SP3232E
series has a high-efficiency, charge-pump power supply that requires only 0.1µF capaci-
tors in 3.3V operation. This charge pump allows the SP3222E/SP3232E series to deliver
true RS-232 performance from a single power supply ranging from +3.0V to +5.5V. The
SP3222E/SP3232E are 2-driver/2-receiver devices. This series is ideal for portable or
hand-held applications such as notebook or palmtop computers. The ESD tolerance of the
SP3222E/SP3232E devices are over +/-15kV for both Human Body Model and IEC61000-4-2
Air discharge test methods. The SP3222E device has a low-power shutdown mode where
the devices' driver outputs and charge pumps are disabled. During shutdown, the supply
current falls to less than 1µA.
MODEL
SP3222E
SP3232E
Power
Supplies
+3.0V to +5.5V
+3.0V to +5.5V
RS-232
Drivers
2
2
RS-232
Receivers
2
2
External
Components
4 Capacitors
4 Capacitors
SELECTION TABLE
Shutdown TTL
# of
3-State Pins
Yes Yes 18, 20
No No 16
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3222E/SP3232E_101_031413
1 page  
Pin Function
NAME
EN
C1+
V+
C1-
C2+
C2-
V-
T1OUT
T2OUT
R1IN
R2IN
R1OUT
R2OUT
T1IN
T2IN
GND
VCC
SHDN
N.C.
FUNCTION
Receiver Enable. Apply Logic LOW for normal operation.
Apply logic HIGH to disable the receiver outputs (high-Z state)
Positive terminal of the voltage doubler charge-pump capacitor
+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
-5.5V output generated by the charge pump
RS-232 driver output.
RS-232 driver output.
RS-232 receiver input
RS-232 receiver input
TTL/CMOS receiver output
TTL/CMOS receiver output
TTL/CMOS driver input
TTL/CMOS driver input
Ground
+3.0V to +5.5V supply voltage
Shutdown Control Input. Drive HIGH for normal device operation.
Drive LOW to shutdown the drivers (high-Z output) and the on-
board power supply
No Connect
PIN NUMBER
SP3222E
SP3232E
SOIC SSOP
TSSOP
11
-
22
33
44
55
66
77
15 17
88
14 16
99
13 15
10 10
12 13
11 12
16 18
17 19
1
2
3
4
5
6
14
7
13
8
12
9
11
10
15
16
18 20
-
- 11, 14
-
Table 1. Device Pin Description
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3222E/SP3232E_101_031413
5 Page 
VCC = +5V
DESCRIPTION
+
C1 –
–5V
+5V
+
C2 –
–5V
Figure 11. Charge Pump — Phase 1
VCC = +5V
C4
+ – VDD Storage Capacitor
– + VSS Storage Capacitor
C3
+
C1 –
+
C2 –
-5.5V
C4
+ – VDD Storage Capacitor
– + VSS Storage Capacitor
C3
Figure 12. Charge Pump — Phase 2
+6V
a) C2+
[
T
]
GND 1
GND 2
T
b) C2-
T
-6V
Ch1 2.00V Ch2 2.00V M 1.00µs Ch1 5.48V
Figure 13. Charge Pump Waveforms
VCC = +5V
+
C1 –
–5V
+5V
+
C2 –
–5V
C4
+ – VDD Storage Capacitor
– + VSS Storage Capacitor
C3
Figure 14. Charge Pump — Phase 3
VCC = +5V
+
C1 –
+5.5V
+
C2 –
C4
+ – VDD Storage Capacitor
– + VSS Storage Capacitor
C3
Figure 15. Charge Pump — Phase 4
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
11
SP3222E/SP3232E_101_031413
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet SP3222E.PDF ] | |
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