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SP3238EDS/04

SP3238E +3.0V to +5.5V RS-232 Transceivers

© Copyright 1999 Sipex Corporation

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SP3238E

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

The SP3238E device is an RS-232 transceiver solution intended for portable or hand-held

applications such as notebook and palmtop computers. The SP3238E uses an internal

high-efficiency, charge-pump power supply that requires only 0.1

µF capacitors in 3.3V

operation. This charge pump and Sipex's driver architecture allow the SP3238E device to

deliver compliant RS-232 performance from a single power supply ranging from +3.0V to

+5.0V. The SP3238E is a 5-driver/3-receiver device, ideal for laptop/notebook computer and

PDA applications. The SP3238E includes one complementary receiver that remains alert to

monitor an external device's Ring Indicate signal while the device is shutdown.

The

Auto-Online 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 1

µA.

s Meets true EIA/TIA-232-F Standards

from a +3.0V to +5.5V power supply

s Interoperable with EIA/TIA-232 and

adheres to EIA/TIA-562 down to a +2.7V

power source

wakes up from a 1

µA shutdown

s Minimum 250Kbps data rate under load

s Regulated Charge Pump Yields Stable

RS-232 Outputs Regardless of V

CC

Variations

s Enhanced ESD Specifications:

+15KV Human Body Model

+15KV IEC1000-4-2 Air Discharge

+8KV IEC1000-4-2 Contact Discharge

DESCRIPTION

SELECTION TABLE

Applicable U.S. Patents - 5,306,954; and other patents pending.

SIGNAL PROCESSING EXCELLENCE