ST ST3241E User Manual

查询ST3241E供应商

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

RS-232 TRANSCEIVER WITH AUTO-POWERDOWN

■ 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

ST3241E

SOP

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.

SSOP

TSSOP

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.

1/10October 2002

ST3241E

ORDERING CODES

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

PIN DESCRIPTION

PlN N° SYMBOL NAME AND FUNCTION

1C
2C
3 V- -5.5V Generated by the Charge Pump

4R1
5R2
6R3
7R4
8R5

9T1
10 T2
11 T3
12 T3
13 T2
14 T1
15 R5
16 R4
17 R3
18 R2
19 R1
20

21

22 SHDN
23 EN
24 C

25 GND Ground
26 V

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

+ Positive Terminal of Inverting Charge Pump Capacitor

2

- Negative Terminal of Inverting Charge Pump Capacitor

2

First Receiver Input Voltage
Second Receiver Input Voltage
Third Receiver Input Voltage
Fourth Receiver Input Voltage
Fifth Receiver Input Voltage
First Transmitter Output Voltage
Second Transmitter Output Voltage
Third Transmitter Output Voltage
Third Transmitter Input Voltage
Second Transmitter Input Voltage
First Transmitter Input Voltage
Fifth Receiver Output Voltage
Fourth Receiver Output Voltage
Third Receiver Output Voltage
Second Receiver Output Voltage
First Receiver Output Voltage
Non-inverting Complementary Receiver Output, always active

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

for wake-up

R2

R1

IN
IN
IN
IN

IN
OUT
OUT
OUT

IN
IN

IN
OUT
OUT
OUT
OUT
OUT

OUTB

OUTB

Shutdown Control. Active Low.
Receiver Enable. Active Low

- Negative Terminal of Voltage- Charge Pump Capacitor

1

CC

+ Positive Terminal of Voltage- Charge Pump Capacitor

1

Supply Voltage

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PIN CONFIGURATION

ST3241E

SHUTDOWN AND ENABLE CONTROL TRUTH TABLE

SHDN EN

T

OUT

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

R

OUT

R

OUTB

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

CC

V+

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

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

SHDN,

T

IN

R

IN

T

OUT

R

OUTROUTB

INVALID

t

SHORT

T

stg

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

Supply Voltage -0.3 to 6
Extra Positive Voltage (Note 1) (V

EN,

Input Voltage -0.3 to 6

Receiver Input Voltage Range ± 25
Transmitter Output Voltage Range ± 13.2
Receiver Output Voltage Range -0.3 to (VCC+ 0.3)

Short Circuit Duration on T

(one at a time) Continuous

OUT

Storage Temperature Range -65 to 150

-0.3) to 7

CC

V
V

V
V

V
V

°C

3/10