SP3238E Datasheet, PDF (1/20 Pages) Sipex Corporation – Intelligent +3.0V to +5.5V RS-232 Transceivers

SIGNAL PROCESSING EXCELLENCE
SP3238E
Intelligent +3.0V to +5.5V RS-232 Transceivers
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
s Auto-Online^™ circuitry automatically
wakes up from a 1µA 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
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 0.1µF 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 1µA.
SELECTION TABLE
Device Power Supplies RS-232 RS-232
Drivers Receivers
SP3221E +3.0V to +5.5V
1
1
External
Components
4 capacitors
Auto-Online TTL 3-State
Circuitry
YES
YES
No. of
Pins
16
SP3223E +3.0V to +5.5V
2
2
4 capacitors
YES
YES
20
SP3243E +3.0V to +5.5V
3
5
4 capacitors
YES
YES
28
SP3238E +3.0V to +5.5V
5
3
4 capacitors
YES
YES
28
Applicable U.S. Patents - 5,306,954; and other patents pending.
SP3238EDS/04
SP3238E +3.0V to +5.5V RS-232 Transceivers
1
© Copyright 1999 Sipex Corporation