Datasheet ST3222ECTR, ST3222ECPR, ST3222ECDR, ST3222ECD, ST3222EBTR Datasheet (SGS Thomson Microelectronics)

±15KV ESD-PROTECTED, 3 TO 5.5V, LOW P OWER,

UP T O 250KBPS, RS-232 DRIVERS AND RECEIVERS

■ ESD PROTECTIO FOR RS-232I/O PINS

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

■ 300µA SUPP LY CURRENT

■ 250Kbps MINIMUM GUARENTEED DATA

RATE

■ 6V/µs MINIMUM GUARANTEED SLEW RATE

■ MEET EIA/TIA-232 SPECIFICATIONS DOWN

TO 3V

■ AVAILABLEIN SO-18, SSOP20 AND

TSSOP20

DESCRIPTION

The ST3222E is a 3V p owered EIA/TIA-23 2 and
V.28/V.24 communications interface with low
power requirements, high data-rate capabilities
and enhanced electrostatic discharge (ESD)
protection to ±8kV using IEC1000-4-2 Contact
Discharge and ±15kV using the Human Body
Model. ST3222E has a proprietary low dropout
transmitter output stage providing true RS-232
performance from 3 to 5V supplies with a dual
charge pump. The charge pump requires only four
small 0.1mF external capacitors for operation form
3V supply.

The dev ice has two receivers and two drivers. The
ST3222E features a 1µA shutdown mode that
reduces power consumption and extends battery
life in port able systems. Its receivers can remain
active in shutdown mode, allowing external

ST3222E

SOP SSOP

TSSOP

devices such as modems to be monitored using
only1µA supply current.
The device is guaranteed to run at data rates of
250Kbps while maintaining RS-232 output levels.
Typical applications are Notebook, Subnotebook
and Palmtop Computers, Battery Powered
Equipment, Hand-Held Equipment, Peripherals
and Printers.

ORDERING CODES

Type

ST3222ECD 0 to 70 °C SO-18 (Tube) 50parts per tube / 20tube per box

ST3222EBD -40 to 85 °C SO-18 (Tube) 50parts per tube / 20tube per box
ST3222ECDR 0 to 70 °C SO-18 (Tape & Reel) 1000 parts per reel
ST3222EBDR -40 to 85 °C SO-18 (Tape & Reel) 1000 parts per reel
ST3222ECPR 0 to 70 °C SSOP20 (Tape & Reel) 1350 parts per reel
ST3222EBPR -40 to 85 °C SSOP20 (Tape & Reel) 1350 parts per reel
ST3222ECTR 0 to 70 °C TSSOP20 (Tape & Reel) 2500 parts per reel

ST3222EBTR -40 to 85 °C TSSOP20 (Tape & Reel) 2500 parts per reel

Temperature

Range

Package Comments

1/10March 2003

ST3222E

PIN CONFIGURATION

PIN DESCRIPTION

SO-18 SSOP20/TSSOP20

PlN N°

(SO-18)

11EN

PlN N°

(SSOP20 TSSP20)

SYMBOL NAME AND FUNCTION

Receiver Enable Control. Drive low for normal
operation. Drive high to force the receivers outputs
(R_OUT) into a high-impedance state.

22

+

C

1

Positive Terminal for the first Charge Pump
Capacitor

3 3 V+ 5.5V Generated By The Charge Pump.
44

55

66

-

C

1

+

C

2

-

C

2

Negative Terminal for the first Charge Pump
Capacitor

Positive Terminal for the second Charge Pump
Capacitor

Negative Terminal for the second Charge Pump

Capacitor
7 7 V- -5.5V Generated By The Charge Pump.
88

99

10 10

T2

R2

R2

OUT

IN

OUT

Second Transmitter Output Voltage

Second Receiver Input Voltage

Second Receiver Output Voltage

11 NC Not Connected
11 12
12 13

T2
T1

IN
IN

Second Transmitter Input Voltage
First Transmitter Input Voltage

14 NC Not Connected
13 15
14 16
15 17

R1

T1

R1

OUT

IN

OUT

First Receiver Output Voltage
First Receiver Input Voltage

First Transmitter Output Voltage
16 18 GND Ground
17 19

V

CC

18 20 SHDN

Supply Voltage

Active Low Shutdown Control Input. Drive Low To

Shut-down Transmittes And Charge Pump

2/10

ST3222E

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

V+

V- Inverted Voltage Terminal 0.3 to -7 V

V+ +|V-| 13 V

T

SHDN

R

T

OUT

R

OUT

t

SHORT

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied. V+ and V- can have a maximum magnitude of +7V, but their absolute addition can not exceed 13 V.

SHUTDOWN AND ENABLE CONTROL TRUTH TABLE

Supply Voltage

CC

Doubled Voltage Terminal (V

Transmitter Input Voltage Range

IN

-0.3 to 6 V

-0.3)to7

CC

-0.3 to 6 V
Transmitter Input Voltage Range -0.3 to 6 V
Receiver Input Voltage Range

IN

Transmitter Output Voltage Range

± 25 V

± 13.2 V

Receiver Output Voltage Range -0.3 to (VCC+ 0.3)
Transmitter Output Short to GND Time

Continuous

V

V

SHDN

EN T-OUT R-OUT

0 0 High Z Active
0 1 High Z High Z
1 0 Active Active
1 1 Active High Z

ESD PERFORMANCE: TRANSMITTER 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 ±8kV

ELECTRICAL CHARACTERISTICS

(C
Typical values are referred to T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

I

SUPPLYVCC

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

1-C4

=25°C)

A

Power Supply Current No Load SHDN=VCCTA= 25°C 0.3 1 mA

I

SHDN

SHUTDOWN Supply
Current

No Load SHDN=VCCTA= 25°C 1 10 µA

LOGIC INPUT E L ECTRICAL CHARACTERISTICS

(C
Typical values are referred to T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

Note 1: Transmitter input hysteresis is typically 250mV

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

1-C4

V

IL

V

IH

V

HYS

I

IL

Input Logic Threshold Low T-IN, EN, SHDN (Note 1) 0.8 V
Input Logic Threshold High VCC= 3.3V 2 V

Transmitter Input
Histeresys

Input Leakage Current T-IN, EN, SHDN ± 0.01 ± 1 µA

=25°C)

A

V

=5V 2.4

CC

0.25 V

3/10

ST3222E

TRANSMITTER ELECTRICAL CHARACTERISTICS

(C
Typical values are referred to T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

R

RECEIVER ELECTRICAL CHARACTERISTICS

(C
Typical values are referred to T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

=0.1µFVCC=3Vto5.5V,TA= -40 to 85°C, unless otherwise specified.

1-C4

=25°C)

A

Output Voltage Swing All Transmitter outputs are loaded with

TOUT

TOUT

I

TSC

I

TOL

Transmitter Output
Resistance

Output Short Circuit Current ± 60 mA
Output Leakage Current VCC= 0V or 3V to 3.6V V

3KΩ to GND
VCC=V+=V-=0V V

= ± 2V 300 10M Ω

OUT

= ± 12V

OUT

Transmitters Disable

=0.1µFVCC=3Vto5.5V,TA= -40 to 85°C, unless otherwise specified.

1-C4

I

OL

V

RIN

V

RIL

V

RIH

RIHYS

R

RIN

V

ROL

V

ROH

Output Leakage Current R-OUT, EN =VCC, Receiver Disabled ± 0.05 ± 10 µA
Receiver Input Voltage

Operating Range
Input Threshold Low TA= 25°C VCC= 3.3V 0.6 1.2 V

Input Threshold High TA= 25°C VCC= 3.3V 1.5 2.4 V

Input Hysteresis 0.5 V
Input Resistance TA= 25°C 3 5 7 KΩ
Output Voltage Low I
Output Voltage High I

=25°C)

A

= 25°C VCC= 5V 0.8 1.5

T

A

= 25°C VCC= 5V 1.8 2.4

T

A

= 1.6mA 0.4 V

OUT

= -1mA VCC-0.6 VCC-0.1 V

OUT

± 5 ± 5.4 V

± 25 µA

-25 25 V

TIMING CHARACTERISTICS

(C
Typical values are referred to T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

-t

|t

-t

(Note 1) Transmitter Skew is measured at the transmitter zero cross points

4/10

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

1-C4

=25°C)

A

Data Transfer Rate RL=3KΩ CL2= 1000pF

D

R

one trasmitter switching

t

PHLR

t

PLHR

|t

PHLT

THL

t

OER

t

ODR

PHLR

THR

S

Propagation Delay Input to
Output

Transmitter Propagation
Delay Difference

|

Receiver Output Enable
Time

Receiver Output Disable
Time

Receiver Propagation Delay
Difference

|

Trnasition Slew Rate TA= 25°C RL=3KΩto 7KΩ VCC= 3.3V

RT

R

XIN

to R

XOUT

CL= 150pF 0.15 µs

(Note 1) 200 ns

Normal Operation 50 ns

Normal Operation 50 ns

measured from +3V to -3V or -3V to +3V

= 150pF to 1000pF

C

L

C

= 150pF to 2500pF

L

250 Kbps

50 ns

6
4

30
30

V/µs
V/µs

APPLICATION CIRCUITS

ST3222E

CAPACITANCE VALUE (µF)

V

CC

3.0 to 3.6 0.1 0.1 0.1 0.1 0.1

4.5 to 5.5 0.047 0.33 0.33 0.33 0.1

3.0 to 5.5 0.1 0.47 0.47 0.47 0.1

C1 C2 C3 C4 Cbypass

5/10

ST3222E

TYPICAL PERFORMANCE CHARACTERISTICS (unless otherwise specified Tj= 25°C)
Figure 1 : Output Current vs Output High Voltage

Figure 4 : Output Current vs Output Low Voltage

Figure 2 : Output Current vs Output High Voltage

Figure 3 : Output Current vs Output Low Voltage

Figure 5 : Voltage Transfer Characteristics

for Trasmitter Inputs

Figure 6 : Receiver Input Resistance

6/10

SO-18 MECHANICAL DATA

ST3222E

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 2.35 2.65 0.092 0.104
A1 0.1 0.3 0.004 0.012
A2 2.55 0.100

B 0.33 0.51 0.013 0.020

C 0.23 0.32 0.009 0.012

D 11.35 11.75 0.447 0.462

E 7.4 7.6 0.291 0.299

e 1.27 0.050

H 10.00 10.65 0.393 0.419

h 0.25 0.75 0.010 0.029
k8 ˚ (max.)
L 0.4 1.27 0.016 0.050

mm. inch

Be

0.10mm
.004

Seating Plane

D

1018

19

A2

h x 45û

A

K

L

A1 C

H

E

SO18

0070768

7/10

ST3222E

SSOP20 MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 2 0.079

A1 0.05 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 6.9 7.2 7.5 0.272 0.283 0.295

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

K0˚4˚8˚0˚4˚8˚

L 0.55 0.75 0.95 0.022 0.030 0.037

A2

A

A1

b

e

K

c

L

E

D

E1

PIN 1 IDENTIFICATION

8/10

1

0061436C

ST3222E

TSSOP20 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 0.0079

D 6.4 6.5 6.6 0.252 0.256 0.260

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

A2

A

A1

b

e

K

c

L

E

D

E1

PIN 1 IDENTIFICATION

1

0087225C

9/10

ST3222E

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mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
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systems without express written approval of STMicroelectronics.

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