SP3223B Datasheet, PDF (1/24 Pages) Sipex Corporation – Intelligent +3.0V to +5.5V RS-232 Transceivers

®
SP3223B/3243B
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 250kbps data rate under load
■ Regulated Charge Pump Yields Stable
RS-232 Outputs Regardless of V_CC
Variations
■ ESD Specifications:
+2kV Human Body Model
DESCRIPTION
The SP3223B and SP3243B products are RS-232 transceiver solutions intended for portable
or hand-held applications such as notebook and palmtop computers. The SP3223B and
SP3243B 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
SP3223B/3243B series to deliver compliant RS-232 performance from a single power supply
ranging from +3.0V to +5.5V. The SP3223B is a 2-driver/2-receiver device, and the SP3243B
is a 3-driver/5-receiver device ideal for laptop/notebook computer and PDA applications. The
SP3243B 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 RS-232
External AUTO ON-LINE^®
Drivers Receivers Components
Circuitry
TTL 3-State
No. of
Pins
SP3223B +3.0V to +5.5V
2
2
4 capacitors
YES
YES
20
SP3243B +3.0V to +5.5V
3
5
4 capacitors
YES
YES
28
Applicable U.S. Patents - 5,306,954; and other patents pending.
Rev. 6/30/03
SP3223B/3243B +3.0V to +5.5V RS-232 Transceivers
1
© Copyright 2003 Sipex Corporation