1

Date: 02/24/05

SP3282EB Intelligent +2.35V to +5.5V RS-232 Transceivers

© Copyright 2005 Sipex Corporation

SP3282EB

Intelligent +2.35V to +5.5V RS-232 Transceivers

The SP3282EB device is an RS-232 transceiver solution intended for portable or hand-held

applications such as notebook and palmtop computers, PDAs, cell phones and their data cables

and cradles.

The SP3282EB is compatible with low voltage logic down to 1.8V using a logic select pin (VL)

which conditions the logic inputs and outputs to be compatible with system logic.

The SP3282EB 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

SP3282EB device to deliver compliant RS-232 performance from a single +3.3V to +5.5Vpower

supply and additionally adhere to EIA/TIA-562 driver outputs levels down to a power supply

voltage of 2.35V.

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.

FEATURES

■ Operates over entire Li+ Battery range

■ Interoperable with EIA/TIA-232-F and

adheres to EIA/TIA-562 down to a

+2.35V power supply

wakes up from a 1µA shutdown

■ Minimum 250Kbps data rate

■ Regulated charge pump yields stable

RS-232 outputs regardless of V

CC

variations

■ Unique V

regardless of V

CC

■ Enhanced ESD Specifications for all

TTL and RS-232 I/O lines.

+15kV Human Body Model

+15kV IEC1000-4-2 Air Discharge

+8kV IEC1000-4-2 Contact Discharge

■ Enhanced battery life as the V

below 3.1V

DESCRIPTION

Applicable U.S. Patents - 5,306,954; and 6,378,026.

®

■ Cell phone data cables

■ PDAs, PDA cradles

■ Hand held equipment

■ Peripherals

APPLICATIONS

Device

Power

RS-232

RS232

External

Data

No. of

Supplies

Drivers

Receivers

Components

Circuitry

Rate

Pins

SP3282EB

2.35V to 5.5V

5

3

4

yes

250kbps

28

TABLE 1

Preliminary

T4IN

1

2

3

4

25

26

27

28

5

6

7

24

23

22

SHUTDOWN

C2-

V-

R1IN

R2IN

R3IN

ONLINE

C2+

C1-

GND

V+

T1IN

8

9

10

11

18

19

20

21

12

13

14

17

16

15

T1OUT

T2OUT

T3OUT

T3IN

T2IN

T5IN

R3OUT

R2OUT

R1OUT

VL

C1+

T4OUT

T5OUT

STATUS

SP3282EB

Now Available in Lead Free Packaging