SP3243EA 查看數據表（PDF） - Signal Processing Technologies
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SP3243EA Datasheet PDF : 23 Pages
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®
SP3223/3243
Intelligent +3.0V to +5.5V RS-232 Transceivers
■ 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
■ AUTO ON-LINE® circuitry automatically
wakes up from a 1µA shutdown
■ Minimum 120Kbps data rate under load
■ Regulated Charge Pump Yields Stable
RS-232 Outputs Regardless of VCC
Variations
■ ESD Specifications:
+2kV Human Body Model
DESCRIPTION
The SP3223 and SP3243 products are RS-232 transceiver solutions intended for portable or
hand-held applications such as notebook and palmtop computers. The SP3223 and SP3243
use an internal high-efficiency, charge-pump power supply that requires only 0.1µF capacitors
in 3.3V operation. This charge pump and Sipex's driver architecture allow the SP3223/
SP3243 series to deliver compliant RS-232 performance from a single power supply ranging
from +3.3V to +5.0V. The SP3223 is a 2-driver/2-receiver device, and the SP3243 is a
3-driver/5-receiver device ideal for laptop/notebook computer and PDA applications.
The SP3243 includes one complementary receiver that remains alert to monitor an external
device's Ring Indicate signal while the device is shutdown.
The AUTO ON-LINE® feature allows the device to automatically "wake-up" during a shutdown
state when an RS-232 cable is connected and a connected peripheral is turned on. Otherwise,
the device automatically shuts itself down drawing less than 1µA.
SELECTION TABLE
Device Power Supplies
RS-232
Drivers
RS-232
Receivers
SP3223 +3.0V to +5.5V
2
2
SP3243 +3.0V to +5.5V
3
5
External
Components
4 capacitors
4 capacitors
AUTO ON-LINE®
Circuitry
TTL 3-State
No. of
Pins
YES
YES
20
YES
YES
28
Applicable U.S. Patents - 5,306,954; and other patents pending.
Rev. 6/30/03
SP3223 +3.0V to +5.5V RS-232 Transceivers
1
© Copyright 2003 Sipex Corporation
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