SP3238E
SIGNAL PROCESSING EXCELLENCE
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
SP3221E
SP3223E
SP3243E
SP3238E
Power Supplies
+3.0V to +5.5V
+3.0V to +5.5V
+3.0V to +5.5V
+3.0V to +5.5V
RS-232
Drivers
1
2
3
5
RS-232
Receivers
1
2
5
3
External
Components
4 capacitors
4 capacitors
4 capacitors
4 capacitors
Auto-Online
Circuitry
YES
YES
YES
YES
TTL 3-State
YES
YES
YES
YES
No. of
Pins
16
20
28
28
Applicable U.S. Patents - 5,306,954; and other patents pending.
SP3238EDS/04
SP3238E +3.0V to +5.5V RS-232 Transceivers
© Copyright 1999 Sipex Corporation
1
SIPEX [ SIPEX CORPORATION ]
