SGS Thomson Microelectronics ST75185CDR, ST75185CD, ST75185CN Datasheet

ST75185

MULTIPLE RS-232 DRIVERS AND RECEIVERS



June 2000

■ MEETS ANDEXCEEDSTHE

REQUIREM EN TSOFEIA/TIA-232-EAND
ITUV.28STANDARD

■

SINGLECHIPWITHEASYINTERFACE
BETWEEN UARTAND SERIALPORT
CONNECTOROFIBMPC/AT AND
COMPATIBLES

■ DESIGNEDTO SUPPORTDATARATESUP

TO120 Kbps

■ PINOUT COMPATIBLEWITHST75C185

DESCRIPTION

The ST75185 contains three drivers and five
receivers. The pinout matches the DB9S
connector design in order to decrease the part
count, reducethe boardspace requiredand allow
easy interconnection of the UART and serialport
connectorof IBM PC/AT and compatibles. The
bipolar circuits and processing of the ST75185
provides a rugged low-cost solution for this
function at the expense of quiescent power and
external passive components relative to the
ST75C185.

The ST75185 complies with the requirements of
the EIA/TIA 232-E and ITU (formallyCCITT) v.28

standards. These standards are for data
interchange between a host computer and
peripheral at signallingrates up to 20k-bits/s.The
switchingspeeds of the ST75185 are fast enough
to support rates up to 120K-bits/s with lower
capacitive loads (shorter cables). Interoperability
at the higher signalling rates cannot be assured
unless the designer has design control of the
cable and the interface circuits at the both ends.
For interoperability at signalling rates to 120
K-bits/s, use of EIA/ITA-423-B (ITU v.10) and
EIA/ITA-422-B (ITU v.11) standards are
recommended.

The ST75185 is characterized for operation over
the range of 0

o

Cto70oC.

PIN CONNECTION IEC LOGICSYMBOL AND LOGICDIAGRAM

ORDERCODES :

ST75185CN ST75185CD

D

(Micro Package)

N

(PlasticPackage)

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ORDERCODES

Typ e T emperature Range Packag e Commen ts

ST75185CN 0 to 70

o

C DIP-20 20 parts per tube / 50 tubesper box

ST75185CD 0 to 70

o

C SO-20 (Tube) 40 parts per tube / 25 tubesper box

ST75185CDR 0 to 70

o

C SO-20 (Tape &Reel) 1000 parts per reel

PIN DESCRIPTION

PIN No SYMBOL NAME AND F UNCTION

1V

DD

Supply Voltage (+12V)
2 RA1 First Receiver Input
3 RA2 Second Receiver Input
4 RA3 Third Receiver Input
5 DY1 First Driver Output
6 DY2 Second Driver Output
7 RA4 FourthReceiver Input
8 DY3 Third Driver Output
9 RA5 Fifth Receiver Input

10 V

SS

Supply Voltage (-12V)

11 GND Ground
12 RY5 Fifth Receiver Output
13 DA3 Third Driver Input
14 RY4 Fourth Receiver Output
15 DA2 Second Driver Input
16 DA1 First Driver Input
17 RY3 Third Receiver Output
18 RY2 Second Receiver Output
19 RY1 First Receiver Output
20 V

CC

Supply Voltage (+5V)

ST75185

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ABSOLUTE MAXIMUM RATINGSOVER OPERATINGFREE-AIR TEMPERATURE RANGE

(unlessotherwise specified)

Symb o l P ara meter Val u e Un i t

V

DD

Supply Voltage (Note 1) 15 V

V

SS

Supply Voltage (Note 1) -15 V

V

CC

Supply Voltage (Note 1) 10 V

V

I

Input Voltage Range (DRIVER) -15 to 7 V

V

I

Input Voltage Range (RECEIVER) -30 to 30 V

V

O

Output Voltage Range (DRIVER) -15 to 15 V

I

O

Receiver Low Level Output Current 20 mA

P

D

Continuous Total Power Dissipation See Dissipation Rating Table

T

A

Operating Free-Air Temperature Range 0 to 70

o

C

T

stg

Storage Temperature Range -65 to +150

o

C

T

L

Lead Temperature 1.6mm from case for 10 sec 260

o

C

AbsoluteMaximumRatingsarethose values beyond whichdamage tothedevicemayoccur. Functionaloperationunderthese condition isnotimplied.
NOTE1:Allvoltage arewithrespecttothenetworkground terminal.

DISSIPATION RATING TABLE

Packag e Pow er Rating

at T

A

≤

25

o

C

Derati n g F actor

above TA=25oC(*)

Power Rating

at T

A

≤

70

o

C

MICROPACKAGE (D) 1125 mW 9.0 mW/

o

C 720 mW

DIP (N) 1150 mW 9.2 mW/

o

C 736 mW

(*)This is thereverse of the traditional junction-case thermal resistance R

tJ-C

RECOMMENDED OPERATINGCONDITIONS

Symb o l P a rameter Mi n Max Uni t

V

DD

Supply Voltage 7.5 15 V

V

SS

Supply Voltage -7.5 -15 V

V

CC

Supply Voltage 4.5 5.5 V

V

IN

Driver Input Voltege 0 V

CC

V

I

OH

High Level Output Current DRIVER -6 mA

RECEIVER -0.5

I

OL

Low Level Output Current DRIVER 6 mA

RECEIVER 16

T

A

Operating Free-Air Temperature 0 70

o

C

ST75185

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SUPPLYCURRENTS

Symbol Parameter Test C ondition s Value Unit

V

DD

V

SS

Min. Typ. Max.

I

DD

Supply Current from V

DD

9-9

No load.

All inputs at

1.9V

15

mA

12 -12 19
15 -15 25

9-9

No load.

All inputs at

0.8V

4.5 mA
12 -12 5.5
15 -15 9

I

SS

Supply Current from V

SS

9-9

No load.

All inputs at

1.9V

-15

mA

12 -12 -19
15 -15 -25

9-9

No load.

All inputs at

0.8V

-3.2 mA
12 -12 -3.2
15 -15 -3.2

I

CC

Supply Current from V

CC

No load. All inputs at 5V

V

CC

=5V

30 mA

DRIVERELECTRICALCHARACTERISTICS OVER OPERATINGFREE-AIR TEMPERATURE
RANGE (V

DD

= 9V, VSS= -9V,VCC=5V, unlessotherwise specified)

Symbol Parameter Test C ondition s Value Unit

Min. Typ. Max.

V

OH

High Level Output Voltage

V

IL

=0.8V RL=3KΩ

(See Figure 1)

6 7.5

V

V

OL

Low Level Output Voltage (Note 3)

V

IH

=1.9V RL=3KΩ

(See Figure 1)

-7.5 -6 V

I

IH

High Level Input Current VI= 5 V (See Figure 2) 10

µ

A

I

IL

Low Level Input Current VI= 0 V (See Figure 2) -1.6 mA

I

OS(H)

High Level Short Circuit Output Current
(Note 4)

VIL=0.8V VO=0V
(See Figure 1)

-4.5 -12 -19.5 mA

I

OS(L)

Low Level Short Circuit Output Current VIH=2V VO=0V

(See Figure 1)

4.5 12 19.5 mA

R

O

Output Resistance VDD=VSS=VCC=0V

V

O

= -2 to 2 V (Note 5)

300

Ω

NOTE3:

The algebraic convention, where the more positive (less negative) limitisdesignated as maximum, isused in this datasheet for logic levels only

(e.g.if-10V isa maximum,thetypicalvalue isa morenegative voltage).

NOTE4:

Outputshortcircuitconditions must mantainthetotal power dissipation below absolute maximumratings.

NOTE5: Testcond ition s arethose specifiedby EIA-232-Eand aslisted above.

ST75185

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