Datasheet ST3241E Datasheet (ST)

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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

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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

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

- Negative Terminal of Inverting Charge Pump Capacitor

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

IN IN IN IN

IN OUT OUT OUT

IN IN

IN OUT OUT OUT OUT OUT

OUTB

Shutdown Control. Active Low. Receiver Enable. Active Low

- Negative Terminal of Voltage- Charge Pump Capacitor

+ Positive Terminal of Voltage- Charge Pump Capacitor

Supply Voltage

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PIN CONFIGURATION

ST3241E

SHUTDOWN AND ENABLE CONTROL TRUTH TABLE

SHDN EN

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

OUT

OUTB

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V+

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

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

SHDN,

OUT

OUTROUTB

INVALID

SHORT

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

V V

°C

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ST3241E

ESD PERFORMANCE: T RANSMITTER OUTPUTS, RECEIVER INPUTS

Symbol Parameter Test Conditions Min. Typ. Max. Unit

ESD ESD Protection Voltage Human Body Model ± 15 KV ESD ESD Protection Voltage IEC 1000-4-2 (Contact Discharge) ± 8KV

ELECTRICAL CHARACTERISTICS

(C Typical values are referred to T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

SUPPLY

LOGIC INPUT AND RECEIVER OUTPUT ELECTRICAL CHARACTERISTICS

(C Typical values are referred to T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

=0.1µF, VCC=3Vto5.5V,TA= -40 to 85°C, unles s otherwise specified.

1-C4

=25°C)

Supply Current No load VCC= 3.3V or 5V, TA= 25°C 0.3 1 mA

SHDN

1-C4

Shutdown Supply Current SHDN =GND, TA= 25°C 1 10 µA

=0.1µF, VCC=3Vto5.5V,TA= -40 to 85°C, unles s otherwise specified.

=25°C)

Input Logic Threshold Low TIN,EN,SHDN 0.8 V

TIL

Input Logic Threshold High VCC= 3.3V

TIH

Input Leakage Current TIN,EN,SHDN ± 0.01 ± 1.0 µA

=5V

2.4

V V

RECEIVER OUTPUT ELECTRICAL CHARACTERISTICS

(C Typical values are referred to T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

=0.1µF, VCC=3Vto5.5V,TA= -40 to 85°C, unles s otherwise specified.

1-C4

=25°C)

Output Leakage Current R

Output Voltage Low I

Output Voltage High I

,EN, Receiver Disabled ± 0.05 ± 10 µA

OUT

= 1.6mA 0.4 V

OUT

= -1mA VCC-0.6 VCC-0.1 V

OUT

TRANSMITTER EL ECTRICAL CHARACTERISTICS

(C Typical values are referred to T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

=0.1µF, VCC=3Vto5.5V,TA= -40 to 85°C, unles s otherwise specified.

1-C4

=25°C)

Output Voltage Swing All Transmitter outputs are loaded with

TOUT

OUT

Output Resistance VCC=V+=V-=0V V Output Short Circuit Current VCC= 3.3V ± 35 ± 60 mA

Output Leackage Current VCC= 0 to 5.5V, trasmitter output = ± 12V,

3KΩ to GND

= ± 2V 300 10M Ω

OUT

trasmitter disabled

Transmitter Output Voltage T1IN = T2IN = GND, T3IN = V

T3OUT loaded with 3KΩ to GND T1OUT and T2OUT loaded with 2.5mA

each

± 5 ± 5.4 V

± 25 mA

± 5V

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ST3241E

RECEIVER ELECTRICAL CHARACTERISTICS

(C Typical values are referred to T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

TIMING CHARACTERISTICS

(C Typical values are referred to T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

T_SKEW

R_SKEW

=0.1µF, VCC=3Vto5.5V,TA= -40 to 85°C, unles s otherwise specified.

1-C4

=25°C)

1-C4

Receiver Input Voltage

RIN

Operating Range RS-232 Input Threshold

RIL

Low RS-232 Input Threshold

RIH

High Input Hysteresis 0.3 V

RIHYS

Input Resistance TA= 25°C 3 5 7 KΩ

RIN

TA= 25°C VCC= 3.3V T

= 25°C VCC= 5.0V

TA= 25°C VCC= 3.3V T

= 25°C VCC= 5.0V

=0.1µF, VCC=3Vto5.5V,TA= -40 to 85°C, unles s otherwise specified.

=25°C)

Maximum Data Rate RL=3KΩ CL= 1000pF

one trasmitter switching

PHL

Receiver PropagationDelay RINto R

PLH

OUT

CL= 150pF 0.15 µs

Transmitter Skew 100 ns Receiver Skew 300 ns Transition Slew Rate TA= 25°C RL=3Kto7KΩ VCC= 3.3V

measured from +3V to -3V or -3V to +3V CL= 150pF to 1000pF

= 150pF to 2500pF

-25 25 V

0.6

0.8

1.2

1.5

1.8

2.4

250 Kbps

6 4

30 30

V/µs V/µs

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ST3241E

APPLICATION CIRCUITS

Figure 1 : REQUIRED MINIMUM CAPACITANCE VALUE (µF)

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VCC(V) C

3 to 3.6 0.1 0.1 0.1

4.5 to 5.5 0.047 0.33 0.1 3 to 5.5 0.1 0.47 0.1

C2,C3,C

BYPASS

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SO-28 MECHANICAL DATA

ST3241E

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 2.65 0.104

a1 0.1 0.3 0.004 0.012

b 0.35 0.49 0.014 0.019

b1 0.23 0.32 0.009 0.012

C 0.5 0.020

c1 45˚ (typ.)

D 17. 70 18.10 0.697 0.713 E 10.00 10.65 0.393 0.419

e 1.27 0.050

e3 16.51 0.650

F 7.40 7.60 0. 291 0.300 L 0.50 1.27 0.020 0.050

S ˚ (max.)

mm. inch

0016023

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ST3241E

SSOP28 MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 2 0.079

A1 0.050 0.002

A2 1.65 1.75 1.85 0.065 0.069 0.073

b 0.22 0.38 0.009 0.015

c 0.09 0.25 0.004 0.010

D 9.9 10.2 10.5 0.390 0.402 0.413

E 7.4 7.8 8.2 0.291 0.307 0.323

E1 5 5.3 5.6 0.197 0.209 0.220

e 0.65 BSC 0.0256 BSC

K 0˚ 10˚ 0˚ 10˚

L 0.55 0.75 0.95 0.022 0.030 0.037

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ST3241E

TSSOP28 MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 1.2 0.047

A1 0.05 0.15 0.002 0.004 0.006

A2 0.8 1 1.05 0.031 0.039 0.041

b 0.19 0.30 0.007 0.012

c 0.09 0.20 0.004 0.0089

D 9.6 9.7 9.8 0.378 0.382 0.386

E 6.2 6.4 6.6 0.244 0.252 0.260

E1 4.3 4.4 4.48 0.169 0.173 0.176

e 0.65 BSC 0.0256 BSC

K0˚ 8˚0˚ 8˚

L 0.45 0.60 0.75 0.018 0.024 0.030

0128292B

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ST3241E

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibilit y for the consequences of use of such informatio n nor for any infringement of paten ts or o ther rig hts of t hird part ies which ma y result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previousl y suppl ied. STM icroel ectronics produc ts are not auth orized for use as c ritica l compone nts in l ife s upport dev ices or systems without express written approval of STMicroelectronics.

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