SGS Thomson Microelectronics ST75C185CTR, ST75C185CN, ST75C185CDR, ST75C185CD, ST75C185BTR Datasheet



MULTIPLE RS-232 DRIVERS AND RECEIVERS

■ MEETS STANDAR DEIA-232-E

■

SINGLECHIPWITHINTERFACEBETWEEN
UARTAND SERIALPORTCONNECTOR

■

LESSTHAN 20mW QUIESCENTPOWER
CONSUMPTION

■ WIDEDRIVERSUPPLYVOLTAGE:7TO13.2V

■

DRIVEROUTPUTSLEWRATE LIMITEDTO
30V/µsMAX

■ RECEIVERINPUTHYSTERESIS:1.1TYP

■ PUSH-PULLRECEIVEROUTPUTS

■ ONCHIPRECEIVER1µsNOISEFILTER

■

FUNCTIONALLY INTERCHANGEABLEWITH
STMST75185

■ ESDPROTECTION:

MODEL

DESCRIPTION

The ST75C185 is low power BICMOS device
containing three independent drivers and five
receivers that is used to interface data terminal
equipment (DTE) with data circuit-terminating
equipment (DCE). This device has been
designed to conform to Standards
ANSI/EIA-232-E. The drivers have a controlled
output slew rate that is limited to a maximum of
30V/µs and the receivers have filters that reject

input noise pulses that are shorter than 1µs. Both

±10KVHUMANBODY

ST75C185

LOW POWER

TARGET DATA

(Micro Package)

(PlasticPackage)

(TSSOPPackage)

these features eliminate the need of external
components.
The ST75C185 hasn’t a power sequence fault
condition. It has been designed using low-power
techniquesin a BICMOStecnology.
In most application the receivers contained in this
device will interface to single inputs peripheral
devices such as ACEs, UARTs or
microprocessors. By using sampling, such
peripheral devices are usuallly insensitive to the
transition times of the input signals. If this is not
the case, or for other uses, it is recommended
that the ST75C185 receiver outputs be buffered
by single gates of the HCMOS, ALS or 74F logic
families.

PIN CONNECTION IEC LOGICSYMBOL AND LOGIC DIAGRAM

June 2000

1/13

ST75C185

ORDERCODES

Typ e Temp era t u re Rang e Packag e Commen ts

ST75C185CN 0 to 70
ST75C185CD 0 to 70

ST75C185CDR 0 to 70

ST75C185CTR 0 to 70

ST75C185BN -40to 85
ST75C185BD -40to 85

ST75C185BDR -40 to 85

ST75C185BTR -40 to 85

PIN DESCRIPTION

PIN No SYMBOL NAME AND F UNCTION

1V
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
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

o

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

o

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

o

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

o

C TSSOP20 (Tape & Reel) 2500 parts per reel

o

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

o

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

o

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

o

C TSSOP20 (Tape & Reel) 2500 parts per reel

DD

SS

CC

Supply Voltage (+12V)

Supply Voltage (-12V)

Supply Voltage (+5V)

2/13

ST75C185

ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIRTEMPERATURE RANGE

(unlessotherwise specified)

Symb o l Parameter Value Uni t

V
V
V

V

V
V
V

I

T

T

T

AbsoluteMaximum Ratingsarethosevaluesbeyond whichdamageto thedevicemayoccur. Functionaloperationunderthesecondition isnotimplied.
NOTE1:All voltages arewithrespect tothenetwork ground terminal.

RECOMMENDED OPERATING CONDITIONS

Symb o l Parameter Mi n TYP Max Unit

V

V

V

V

I

OH

I

T

NOTE 2: The algebraic convertion, where the more positive (less negative) limitis designed as maximum, isused in this datasheet for logic levels only,
e.g.if-10Visa maximum,thetypicalvalueisa morenegativevoltage.

Supply Voltage (Note 1) 15 V

DD

Supply Voltage (Note 1) -15 V

SS

Supply Voltage (Note 1) 7 V

CC

Input Voltage Range (DRIVER) -0.3 to (VCC+0.3) V

I

Input Voltage Range (RECEIVER) -30 to 30 V

I

Output Voltage Range (DRIVER) (VSS-6) to (VDD+6) V

O

Output Voltage Range (RECEIVER) -0.3 to (VCC+0.3) V

O

Receiver Low Level Output Current 20 mA

O

Operating Free-Air Temperature Range -40 to 85

A

Storage Temperature Range -65 to +150

stg

Lead Temperature 1.6mm from case for 10 sec 260

L

Supply Voltage 7 12 13.2 V

DD

Supply Voltage -7 -12 -13.2 V

SS

Supply Voltage 4.5 5 5.5 V

CC

Input Voltage (Note 2) DRIVER 0V

IN

CC

RECEIVER -25 25
High Level Output Current RECEIVER -1 mA
Low Level Output Current RECEIVER 3.2 mA

OL

Operating Free-Air Temperature -40 25 85

A

o

C

o

C

o

C

V

o

C

3/13

ST75C185

SUPPLYCURRENTS

= 12V, VSS= -12V,VCC= 5V, unlessotherwise specified)

(V

DD

Symbol Parameter Test Cond itions Value Uni t

Min. Typ. Max.

Supply Current from V

I

DD

Supply Current from V

I

SS

Supply Current from V

I

CC

DD
SS
CC

No load. All inputs at 2 or 0.8V 115 500
No load. All inputs at 2 or 0.8V -115 -500 µ
No load. All inputs at 0 or 5V 950 1500

A

µ

A
A

µ

DRIVERELECTRICALCHARACTERISTICS OVER OPERATINGTEMPERATURE RANGE

= 12V, VSS=-12V, VCC=5V±10%, unlessotherwise specified)

(V

DD

Symbol Parameter Test Cond itions Value Uni t

Min. Typ. Max.

High Level Output Voltage VIL=0.8V

V

OH

R

=3K

L

Ω

(See Figure 1)

V

Low Level Output Voltage

OL

(Note 3)

VIH= 1.9 V

=3K

R

Ω

L

(See Figure 1)

V

High Level Input Voltage 2 1.4 V

IH

Low Level Input Voltage 1.4 0.8 V

V

IL

High Level Input Current VI= 5 V (See Figure 2) 1 µA

I

IH

Low Level Input Current VI= 0 V (See Figure 2) -1 µA

I

IL

I

High Level Short Circuit

OS(H)

Output Current (Note 4)

I

Low Level Short Circuit

OS(L)

Output Current (Note 4)
Output Resistance VO=-2to2V VSS=VCC=VDD= 0V 300 450

R

O

NOTE3: The algebraic convention, where themore positive (less negative) limit is designated as maximum, isused in thisdatasheet forlogic levels only
(e.g.if-10Visa maximum,thetypicalvalueis a morenegative voltage).
NOTE4: Notmorethanoneoutputs shouldbeshorted atonetime.

VI=0.8V VO=0VorV
(See Figure 1)

VI=2V VO=0VorV
(See Figure 1)

V

= 7V, VSS= -7V 5 6.3 V

DD

= 12V, VSS= -12V 10 10.8 V

V

DD

V

= 7V, VSS= -7V -6.3 -5 V

DD

V

= 12V, VSS= -12V -10.8 -10 V

DD

SS

SS

-6 -20 -60 mA

63560mA

Ω

DRIVERSWITCHING CHARACTERISTICS

= 12V, VSS=-12V, VCC=5V TA=25oC)

(V

DD

Symbol Parameter Test Cond itions Value Uni t

Min. Typ. Max.

Propagation Delay Time, Low

t

PLH

to High Level Output

t

Propagation Delay Time High

PHL

to Low Level Output
Transition Time Low to High

t

TLH

Level Output

t

Transition Time High to Low

THL

Level Output

SR Output Slew Rate (Note 5)

=3to7KΩCL=1000pF

R

L

(See Figures 3)

=3to7KΩCL=1000pF

R

L

(See Figures 3)

=3to7KΩCL=1000pF

R

L

(See Figures 3)

=3to7KΩ CL=1000pF

R

L

(See Figure 3)
R

=3to7K

L

= 50 to 2500 pF

C

L

Ω

0.53 2 3.2

0.53 2 3.2 µs

(See Figure 3)

NOTE5: Measuredbetween-3Vand3Vpointsofoutputwaveform(EIA-232-Econditions), allunusedinputstied eitherhighorlow.

4/13

1.9 4

µ

1.6 4 µs

µ

41130V/

s

s

s

µ

ST75C185

RECEIVERELECTRICAL CHARACTERISTICS OVER OPERATINGTEMPERATURERANGE

= 12V, VSS=-12V, VCC=5V±10%, unlessotherwise specified)

(V

DD

Symbol Parameter Test Cond itions Value Uni t

Min. Typ. Max.

Positive Going Threshold

V

T+

Voltage
Negative Going Threshold

V

T-

Voltage
Input Hysteresis (VT+-VT-)

V

hys

(Note 6)
High Level Output Voltage

V

OH

(Note 7)
Low Level Output Voltage VI=3V IOL=3.2mA

V

OL

High Level Input Current VI= 25 V (See Figure 6) 3.6 4.5 8.3 mA

I

IH

Low Level Input Current VI= -25 V (See Figure 6) -3.6 -4.4 -8.3 mA

I

IL

I

Short-Circuit Output Current

OS(H)

at High Level

I

Short-Circuit Output Current

OS(L)

at Low Level

AlltypicalvaluesareatTA=25oC,

NOTE6: Hysteresis is thedifference between the positive going input threshold voltage, V
NOTE7: Ifthe inputs are letfunconnected, the receiver interprets thisas an input low, and the receiver outputs willremain in the high state.

(See Figure 6) 1.6 2.1 2.55

(See Figure 6) 0.65 1 1.25 V

0.6 1.1

IOH= 0.75mA or Input Open

= -1mA (See Figure 6)

I

OH

3.5 4.8 V

0.2 0.4 V

(See Figure 6)

= 3 V (See Figure 6) 0.43 0.55 1

V

I

= -3 V (See Figure 6) -0.4 -0.55 -1

V

I

VI=0.75V VO=0V

-13 -30 mA

(See Figure 5)
VI=V

CC

VO=V

CC

35 60 mA

(See Figure 5)

, and the negative going input threshold voltage VT-.

T+

V

V

RECEIVER SWITCHINGCHARACTERISTICS

= 12V, VSS= -12V,VCC=5V±10% TA=25oC)

(V

DD

Symb ol Parameter Test Co n d iti ons V al u e Unit

Min. Typ. Max.

Propagation Delay Time, Low

t

t

t

t

t

W(N)

PLH

to High Level Output
Propagation Delay Time High

PHL

to Low Level Output
Transition Time Low to High

TLH

Level Output
Transition Time High to Low

THL

Level Output
Pulse Duration of longest

pulse rejection as noise

=5KΩ CL=50pF

R

L

(See Figure 6)

=5KΩCL=50pF

R

L

(See Figure 6)

=5KΩCL=50pF

R

L

(See Figure 6)

=5KΩ CL=50pF

R

L

(See Figure 6)

=5KΩCL=50pF

R

L

(See Figure 6)

(Note8)

NOTE8:Thereceiverignoresanypositiveor negativegoingpulsethatis lessthantheminimumvalueoft
pulsegreater thanthemaximum oft

W(N)

.

andaccepts anypositiveornegative going

W(N)

3.2 4

2.6 4 µs

30 100 ns

10 50 ns

1 2.3 4

µ

µ

s

s

5/13

ST75C185

APPLICATION CIRCUITS

TTL LEVEL

DCD 38
DSR 37
RXD 21

UART

(16550)

RTS 32

TXD 11

CTS 36
DTR 33

RI 39

To CPU BUS

100nF

Vdd
+12 V

ST75C185

Vcc

20

Rout1

19

Rout2

18

Rout3

17

Din1

16

Din2

15

Rout4

14

Din3

13 8

Rout5

12

GND

11

Vdd

Rin1

Rin2

Rin3

Dout1

Dout2

Rin4

Dout3

Rin5

Vss

1

2

3

4

5

6

7

9

10

Vss

-12V

Vcc
+5 V

100nF

CL

100nF

RS232 LEVEL

PC Serial Port

1

DCD
DSR

RXD
RTS

CL

TXD
CTS
DTR

CL

RI
GND

6

2

7

3

8

4

9

5

DB9S EIA232-E
Serial Port
Connector

FIGURE1: Driver Test Circuit for VOH,VOL,

and I

I

SO(H)

6/13

SO(L)

FIGURE2: Driver Test Circuit for IIHand I

IL

ST75C185

FIGURE3:

DriverTest Circuit

FIGURE5: Receiver Test Circuit for I

OS

FIGURE4:

Driver VoltageWaveforms

FIGURE6: Receiver Test Circuit forVT,VOH,V

OL

FIGURE7: Receiver Test Circuit FIGURE8: Receiver Voltage Waveforms

NOTEA:Thepulsegenerator has thefollowingcharacteristics:t
NOTEB:C

includesprobeandjigcapacitance.

L

=25µs,PRR=20KHz,ZO=50Ω,tr=tf<50ns.

W

7/13

ST75C185

DriverVoltage Transfer Characteristics

DriverShort Circuit OutputCurrent vs Free-Air
Temperature

DriverOutput Current vs OutputVoltage

DeviceSupply Current vs Temperature

ReceiverThresholdvs Temperature

8/13

ReceiverThresholdvs SupplyVoltage

ST75C185

APPLICATION INFORMATION: DIODESON POWER SUPPLY

Diodes placedin serieswith theV

and VSSleads protectthe ST75C185in the fault condition in which

DD

the devices output are shorted to±15V and the power supplies are at low state and provide
low-impedancepath to ground (see Figure below). Any idle transmitterinput mustbe connectedto GND

. This deviceis not sensitiveto power supply sequence.

or V

CC

+Vdd

Output

ST75C185

Output shorted
to ±15V

Output

ST75C185

-Vss

9/13

ST75C185

Plastic DIP-20 (0.25)MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

a1 0.254 0.010

B 1.39 1.65 0.055 0.065

b 0.45 0.018

b1 0.25 0.010

D 25.4 1.000
E 8.5 0.335

e 2.54 0.100

e3 22.86 0.900

F 7.1 0.280

I 3.93 0.155

L 3.3 0.130

Z 1.34 0.053

mm inch

10/13

P001J

SO-20 MECHANICAL DATA

ST75C185

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 2.65 0.104
a1 0.10 0.20 0.004 0.007
a2 2.45 0.096

b 0.35 0.49 0.013 0.019

b1 0.23 0.32 0.009 0.012

C 0.50 0.020
c1 45 (typ.)

D 12.60 13.00 0.496 0.512

E 10.00 10.65 0.393 0.419

e 1.27 0.050

e3 11.43 0.450

F 7.40 7.60 0.291 0.299

L 0.50 1.27 0.19 0.050
M 0.75 0.029
S 8 (max.)

mm inch

P013L

11/13

ST75C185

TSSOP20 MECHANICAL DATA

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

A 1.1 0.433

A1 0.05 0.10 0.15 0.002 0.004 0.006

A2 0.85 0.9 0.95 0.335 0.354 0.374

b 0.19 0.30 0.0075 0.0118

c 0.09 0.2 0.0035 0.0079

D 6.4 6.5 6.6 0.252 0.256 0.260

E 6.25 6.4 6.5 0.246 0.252 0.256

E1 4.3 4.4 4.48 0.169 0.173 0.176

e 0.65 BSC 0.0256 BSC

K0

o

o

4

o

8

o

0

o

4

8

L 0.50 0.60 0.70 0.020 0.024 0.028

o

A

PIN 1 IDENTIFICATION

12/13

A2

A1

b

e

K

c

L

E

D

E1

1

ST75C185

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13/13