SP3244E-SP3245E
3.0V to 5.5V RS-232 Transceivers with Auto On-Line® Plus
• Contains 3-Drivers and 5-Receivers;
Single-chip DTE (PC or terminal) serial port transceiver
• Auto On-line
®
Plus
• SP3244E slew-controlled to 250Kbps under load
• SP3245E 1Mbps data rate for high-speed RS-232
• Meets true EIA/TIA-232-F and ITU V.28 standards
from a +3.0V to +5.5V power supply
• Adheres to EIA/TIA-562 for interoperability
with EIA/TIA-232 down to a +2.7V supply voltage
• Regulated charge pump yields stable RS-232
outputs regardless of V
CC
variations
• ESD Specifications:
±
15KV Human Body Model
±
15KV IEC1000-4-2 Air Discharge
±
8KV IEC1000-4-2 Contact Discharge
FEATURES
C2+ 1
C2- 2
V- 3
R
1
IN 4
28 C1+
27 V+
26 V
CC
25 GND
24 C1-
R
2
IN 5
R
3
IN 6 SP3244E 23 ONLINE
SP3245E
22 SHUTDOWN
R
4
IN 7
21 STATUS
R
5
IN 8
T
1
OUT 9
T
2
OUT 10
T
3
OUT 11
T
3
IN 12
T
2
IN 13
T
1
IN 14
20 R
2
OUT
19 R
1
OUT
18 R
2
OUT
17 R
3
OUT
16 R
4
OUT
15 R
5
OUT
APPLICATIONS
• Portable RS-232
• Laptops and handheld PCs and PDA
• Cellular telephones, datacables, chargingcradles
• Diagnostic/upload ports on embedded applications
• Use in conjunction with low-voltage UART or
microcontroller
• SP3244E is cross-compatible with MAX3244E,
ICL3244E
• SP3245E is cross-compatible with MAX3245E,
ICL3245E
The SP3244E/3245E is a 3-driver/5-receiver device ideal for mobile phone, consumer and PDA
applications. These devices use an internal high-efficiency, charge-pump power supply that requires
only 0.1µF capacitors for 3.3V single-supply operation. This charge pump and Sipex’s driver archi-
tecture allow the SP3244E/3245E to deliver compliant RS-232 performance from a power supply
ranging from +3.0V to +5.5V. At voltages between +2.7V and +3.0V the driver outputs are compliant
with RS-562 and can interface to RS-232 in portable applications.
The Auto On-line
®
Plus feature allows the device to automatically enter a low power shutdown
mode if all receiver and driver inputs have been idle for 30 seconds. The device will “wake-up” from
this automatic shutdown state upon detecting activity. This power saving feature functions without
system intervention or modifications to software or drivers.
SP3244E supports serial data rates of 250kbps minimum under full load and while maintaining
slew rates of less than 30V/µs. SP3245E is capable of high speed communication of up to 1Mbps.
Rev M 10/9/06
SP3244E-SP3245E, 3.0V to 5.5V RS-232 Transceivers with Auto On-Line
®
Plus
© Copyright 2006 Sipex Corporation
DESCRIPTION
1
SIPEX [ SIPEX CORPORATION ]
