ST ST207EB, ST207EC User Manual

± 15 kV ESD protected 5 V RS-232 transceiver

Features

■ ESD protection for RS-232 i/o pins: ±15 kV

human body model

■ 230kbps data rate

■ Guaranteed slew rate 3 V/ms (min.)

■ Operates from a single 5 V power supply

■ Packaged in SSO-24 and TSSOP24

ST207EB
ST207EC

Description

The ST207E is a 5 driver and 3 receiver devices
designed for RS-232 and V.28 communications in
harsh environments. Each transmitter output and
receiver input is protected against ±15 KV
electrostatic discharge (ESD) shocks. The drivers
and receivers of the ST207E meet all EIA/TIA­232E and CCITT V.28 specifications at data rates
up to 120 Kbps, when loaded in accordance with
the EIA/TIA-232E specification.

The ST207E operates with four 0.1 µF capacitors.
It came in 24-pin SSOP and TSSOP packages.

SSOP

TSSOP

Table 1. Device summary

Order codes

ST207ECPR 0 to 70 °C SSOP-24 (Tape & Reel) 1350 parts per reel

ST207EBPR -40 to 85 °C SSOP-24 (Tape & Reel) 1350 parts per reel

ST207ECTR 0 to 70 °C TSSOP24 (Tape & Reel) 2500 parts per reel

ST207EBTR -40 to 85 °C TSSOP24 (Tape & Reel) 2500 parts per reel

August 2007 Rev. 15 1/15

Temperature

range

Package Packaging

www.st.com

15

ST207EB - ST207EC

Contents

1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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ST207EB - ST207EC Pin configuration

1 Pin configuration

Figure 1. Pin connections (top view)

Table 2. Pin description

Pin N° Symbol Note

1T3

2T1

3T2

OUT

OUT

OUT

4R1

5R1

OUT

6T2

7T1

8 GND Ground

9V

10 C

CC

1+

11 V

12 C

13 C

14 C

1-

2+

2-

15 V

16 R3

17 R3

OUT

RS-232 driver output

RS-232 driver output

RS-232 driver output

RS-232 receiver input

IN

TTL/CMOS receiver output

TTL/CMOS driver input internal pull-up to V

IN

TTL/CMOS driver input internal pull-up to V

IN

4.75V to 5.25V supply voltage

Terminal for positive charge-pump capacitor

2VCC generated by the charge-pump

+

Terminal for negative charge-pump capacitor

Terminal for positive charge-pump capacitor

Terminal for negative charge-pump capacitor

-2VCC generated by the charge-pump

-

RS-232 receiver input

IN

TTL/CMOS receiver output

CC

CC

3/15

Pin configuration ST207EB - ST207EC

Table 2. Pin description

Pin N° Symbol Note

18 T3

19 T4

20 T5

21 T5

22 R2

23 R2

24 T4

IN

IN

OUT

IN

OUT

IN

OUT

TTL/CMOS driver input internal pull-up to V

TTL/CMOS driver input internal pull-up to V

RS-232 driver output

TTL/CMOS driver input internal pull-up to V

TTL/CMOS receiver output

RS-232 receiver input

RS-232 driver output

CC

CC

CC

4/15

ST207EB - ST207EC Maximum ratings

2 Maximum ratings

Table 3. Absolute maximum ratings

Symbol Parameter Value Unit

V

CC

V+ Extra positive voltage (V

Supply voltage -0.3 to 6 V

- 0.3) to 14 V

CC

V- Extra negative voltage -14 to 0.3 V

T

R

T

OUT

R

OUT

T

SHORT

T

STG

IN

IN

Transmitter input voltage range -0.3 to (VCC + 0.3) V

Receiver input voltage range ± 30 V

Transmitter output voltage range (V- - 0.3) to (V+ + 0.3) V

Receiver output voltage range -0.3 to (VCC + 0.3) V

Short circuit duration on t

OUT

Continuous

Storage temperature range -65 to 150 °C

Note: 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.

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Electrical characteristics ST207EB - ST207EC

3 Electrical characteristics

Table 4. ESD Performance: transmitter outputs, receiver inputs

Symbol Parameter Test condition Min. Typ. Max. Unit

ESD ESD protection voltage Human body model ± 15 KV

ESD ESD protection voltage IEC-1000-4-2 Contact discharge ± 8KV

Table 5. Electrical characteristics

(C

- C4 = 0.1 µF, VCC = 5 V ± 5%, TA = min. to max., unless otherwise specified. Typical

1

values are referred to T

Symbol Parameter Test condition Min. Typ. Max. Unit

= 25°C).

A

I

SUPPLY

VCC power supply current No Load, TA = 25°C 2 5 mA

Table 6. Transmitter electrical characteristics

(C

- C4 = 0.1 µF, VCC = 5V ± 5%, TA = min. to max., unless otherwise specified. Typical

1

values are referred to T

= 25°C).

A

Symbol Parameter Test condition Min. Typ. Max. Unit

V

R

V

TOUT

I

V

Output voltage swing All Driver loaded with 3KΩ to GND ± 5 ± 8.5 V

Transmitter output resistance VCC = V+ = V- = 0V V

OUT

Output short circuit current ± 18 ± 60 mA

SC

Input pull-up current TIN = 0V 15 200 µA

I

IL

Input logic threshold low 0.8 V

TIL

Input logic threshold high 2 V

TIH

= ± 2V 300 Ω

OUT

Table 7. Receiver electrical characteristics

(C

- C4 = 0.1 µF, VCC = 5 V ± 5%, TA = min. to max., unless otherwise specified. Typical

1

values are referred to T

Symbol Parameter Test condition Min. Typ. Max. Unit

V

RIN

Receiver input voltage
operating range

= 25°C).

A

-30 30 V

6/15

V

V

V

RIHYS

R

V

V

RIL

RIH

RIN

OL

OH

Input threshold low TA = 25°C VCC = 5V 0.8 1.2 V

Input threshold high TA = 25°C VCC = 5V 1.7 2.4 V

Input hysteresis VCC = 5V, no hysteresis in shutdown 0.2 0.5 1 V

Input resistance TA = 25°C VCC = 5V 3 5 7 KΩ

Output voltage low 0.4 V

Output voltage high I

= -1mA 3.5 VCC-0.4 V

OUT

ST207EB - ST207EC Electrical characteristics

Table 8. Timing characteristics

(C

- C4 = 0.1 µF, VCC = 5V ± 5%, TA = min. to max., unless otherwise specified. Typical

1

values are referred to T

Symbol Parameter Test condition Min. Typ. Max. Unit

D

Maximum data rate

R

= 25°C).

A

RL = 3kΩ to 7kΩ
CL= 50pF to 1000pF
one transmitter switching

R

= 3kΩ to 7kΩ CL= 50pF to 150pF

L

one transmitter switching

150 240 Kbps

230 300 Kbps

t

PHLR

t

PLHR

t

PHLT

t

PLHT

SR

Receiver propagation
delay

Transmitter propagation
delay

Transition-region slew
rate

All drivers loaded with 3KΩ to GND 0.2 10 µs

RL = 3kΩ CL= 2500pF
All transmitter loaded

= 25°C RL = 3 to 7 kΩ VCC = 5 V

T

A

CL = 50pF to 1000pF measured from

3 7 30 V/µs

23µs

+3V to -3V or -3V to +3V

7/15

Typical application ST207EB - ST207EC

4 Typical application

Figure 2. Application circuit

Table 9. Capacitance value (µF)

C1 C2 C3 C4 C5

0.1 0.1 0.1 0.1 0.1

8/15

ST207EB - ST207EC Package mechanical data

5 Package mechanical data

In order to meet environmental requirements, ST offers these devices in ECOPACK
packages. These packages have a Lead-free second level interconnect. The category of
second Level Interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.

®

9/15

Package mechanical data ST207EB - ST207EC

SSOP24 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

c0.09 0.25 0.004 0.010

D7.98.2 8.5 0.311 0.323 0.335

E 7.4 7.88.2 0.2910.307 0.323

E1 5.00 5.3 5.6 0.197 0.209 0.220

e 0.65 BSC 0.0256 BSC

K0° 8°0° 8°

L 0.55 0.75 0.95 0.022 0.030 0.037

A2

A

A1

b

e

D

K

c

E1

L

E

PIN 1 IDENTIFICATION

10/15

1

0053237/C

ST207EB - ST207EC Package mechanical data

TSSOP24 mechanical data

mm. inch.

Dim.

Min. Typ. Max. Min. Typ. Max.

A 1.1 0.043

A1 0.05 0.15 0.002 0.006

A2 0.9 0.035

b 0.19 0.30 0.0075 0.0118

c0.09 0.20 0.0035 0.0079

D 7.7 7.9 0.303 0.311

E4.3 4.5 0.169 0.177

e 0.65 BSC 0.0256 BSC

H 6.25 6.5 0.246 0.256

K0° 8°0° 8°

L 0.50 0.70 0.020 0.028

A2

A

A1

b

e

D

K

c

E

L

H

PIN 1 IDENTIFICATION

1

7047476B

11/15

Package mechanical data ST207EB - ST207EC

Tape & reel SSOP24 mechanical data

mm. inch.

Dim.

Min. Typ. Max. Min. Typ. Max.

A 330 12.992

C 12.8 13.2 0.504 0.519

D 20.2 0.795

N60 2.362

T 22.4 0.882

Ao 8.4 8.6 0.3310.339

Bo 8.7 8.9 0.343 0.351

Ko 2.93.1 0.114 0.122

Po 3.9 4.1 0.153 0.161

P 11.9 12.1 0.468 0.476

12/15

ST207EB - ST207EC Package mechanical data

Tape & reel TSSOP24 mechanical data

mm. inch.

Dim.

Min. Typ. Max. Min. Typ. Max.

A 330 12.992

C 12.8 13.2 0.504 0.519

D 20.2 0.795

N60 2.362

T 22.4 0.882

Ao 6.8 7 0.268 0.276

Bo 8.2 8.4 0.323 0.331

Ko 1.7 1.9 0.067 0.075

Po 3.9 4.1 0.153 0.161

P 11.9 12.1 0.468 0.476

13/15

Revision history ST207EB - ST207EC

6 Revision history

Table 10. Revision history

Date Revision Changes

09-Feb-2005 13 Mistake on Table 1.

14-Mar-2006 14 Order codes has been updated and new template.

22-Aug-2007 15 Added Table 1. in cover page.

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ST207EB - ST207EC

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