SGS Thomson Microelectronics ST3241ECTR, ST3241ECPR, ST3241ECDR, ST3241ECD, ST3241EBTR Datasheet

1/10October 2002

■ ESD PROTECTION FOR RS-232 I/O PINS:

±8KV IEC 1000-4-2 CONTACT DISCHARGE
±15KV HUMAN BODY MODEL

■ 1µA SUPPLY CURRENT ACHIEVED WHEN

IN AUTO-POWERDOWN

■ 250Kbps MINIMUM GUARANTEED DATA

RATE

■ GUARANTEED 6V/µsSLEWRATERANGE

■ GUARANTEED MOUSE DRIVEABILITY

■ 0.1µF EXTERNAL CAPACITORS

■ MEET EIA/TIA-232SPECIFICATIONSDOWN

TO 3V

■ AVAILABLEIN SO-28, SSOP28 AND

TSSOP28 PACKAGES

DESCRIPTION

The ST3241E device consists of 3 drivers, 5
receivers and a dual charge-pump circuit. The
device meets the requirements of EIA/TIA and
V.28/V.24 comunication standards providing high
data rate capability and enhanced electrostatic
discharge (ESD) protection. All trans mi tter outputs
and receiver input are protected to ±8KV USING
IEC 1000-4-2 contact discharg e and ±15KV using
the H uman B ody Model. The receiver R2 is
always act ive to implement a wake-up feature for
serial port.

The ST3241 E has a proprietary low-dropout
transmitter output stage enabling true RS-232
performance from a 3.0V to 5.5V supply with a
dual charge pump. The device is guaranteed to
run at data rates of 250kbps while maintaining
RS-232 output levels.

It is a complete serial port (3 drivers, 5 receivers)
intended for notebook or subnotebook compute rs.
Receivers R1 and R2 hav e extra out puts in
addition to t heir standard outputs. These ex tra
outputaare always active.
Typical application are in notebook, subnotebook,
palmtop computers, battery-powered equipment,
hand-held equipment, peripherals and printers.

ST3241E

±15KV ESD PROTECTED 3 TO 5.5V, 400KBPS,

RS-232 TRANSCEIVER WITH AUTO-POWERDOWN

SSOP

SOP

TSSOP

ST3241E

2/10

ORDERING CODES

PIN DESCRIPTION

Type

Temperature

Range

Package Comments

ST3241ECD 0 to 70 °C SO-28 (Tube) 27parts per tube / 12tube per box

ST3241EBD -40 to 85 °C SO-28 (Tube) 27parts per tube / 12tube per box
ST3241ECDR 0 to 70 °C SO-28 (Tape & Reel) 1000 parts per reel
ST3241EBDR -40 to 85 °C SO-28 (Tape & Reel) 1000 parts per reel
ST3241ECPR 0 to 70 °C SSOP-28 (Tape & Reel) 1350 parts per reel
ST3241EBPR -40 to 85 °C SSOP-28 (Tape & Reel) 1350 parts per reel
ST3241ECTR 0 to 70 °C TSSOP28 (Tape & Reel) 2500 parts per reel

ST3241EBTR -40 to 85 °C TSSOP28 (Tape & Reel) 2500 parts per reel

PlN N° SYMBOL NAME AND FUNCTION

1C

2

+ Positive Terminal of Inverting Charge Pump Capacitor

2C

2

- Negative Terminal of Inverting Charge Pump Capacitor

3 V- -5.5V Generated by the Charge Pump
4R1

IN

First Receiver Input Voltage

5R2

IN

Second Receiver Input Voltage

6R3

IN

Third Receiver Input Voltage

7R4

IN

Fourth Receiver Input Voltage

8R5

IN

Fifth Receiver Input Voltage

9T1

OUT

First Transmitter Output Voltage

10 T2

OUT

Second Transmitter Output Voltage

11 T3

OUT

Third Transmitter Output Voltage

12 T3

IN

Third Transmitter Input Voltage

13 T2

IN

Second Transmitter Input Voltage

14 T1

IN

First Transmitter Input Voltage

15 R5

OUT

Fifth Receiver Output Voltage

16 R4

OUT

Fourth Receiver Output Voltage

17 R3

OUT

Third Receiver Output Voltage

18 R2

OUT

Second Receiver Output Voltage

19 R1

OUT

First Receiver Output Voltage

20

R2

OUTB

Non-inverting Complementary Receiver Output, always active
for wake-up

21

R1

OUTB

Non-inverting Complementary Receiver Output, always active
for wake-up

22 SHDN

Shutdown Control. Active Low.

23 EN

Receiver Enable. Active Low

24 C

1

- Negative Terminal of Voltage- Charge Pump Capacitor

25 GND Ground
26 V

CC

Supply Voltage

27 V+ 5.5V Generated by the Charge Pump
28 C

1

+ Positive Terminal of Voltage- Charge Pump Capacitor

ST3241E

3/10

PIN CONFIGURATION

SHUTDOWN AND ENABLE CONTROL TRUTH TABLE

ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.

Note 1: V+ and V- can have magnitude of 7V, but their absolute difference cannot exceed 13V

SHDN EN

T

OUT

R

OUT

R

OUTB

0 0 HIGH Z ACTIVE ACTIVE
0 1 HIGH Z HIGH Z ACTIVE
1 0 ACTIVE ACTIVE ACTIVE
1 1 ACTIVE HIGH Z ACTIVE

Symbol Parameter Value Unit

V

CC

Supply Voltage -0.3 to 6

V

V+

Extra Positive Voltage (Note 1) (V

CC

-0.3) to 7

V

V- Extra negative Voltage (Note 1) 0.3 to -7 V

V+ +|V-| (Note 1) 13 V

SHDN,

EN,

T

IN

Input Voltage -0.3 to 6

V

R

IN

Receiver Input Voltage Range ± 25

V

T

OUT

Transmitter Output Voltage Range ± 13.2

V

R

OUTROUTB

INVALID

Receiver Output Voltage Range -0.3 to (VCC+ 0.3)

V

t

SHORT

Short Circuit Duration on T

OUT

(one at a time) Continuous

T

stg

Storage Temperature Range -65 to 150

°C