ST75185CN Fast Delivery |IC PHOENIX CO.,LIMITED

ST75185CN ,MULTIPLE RS-232 DRIVERS AND RECEIVERSABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE(unless otherwise specified)Symbo ..
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ST75185CN
MULTIPLE RS-232 DRIVERS AND RECEIVERS
ST75185
MULTIPLE RS-232 DRIVERS AND RECEIVERS
June 2000 MEETS AND EXCEEDS THE
REQUIREMENTSOF EIA/TIA-232-EAND
ITUV.28 STANDARD SINGLECHIP WITHEASYINTERFACE
BETWEENUART AND SERIALPORT
CONNECTOROF IBMPC/AT AND
COMPATIBLES DESIGNEDTO SUPPORT DATA RATESUP
TO120 Kbps PINOUT COMPATIBLEWITH ST75C185
DESCRIPTION
The ST75185 contains three drivers and five
receivers. The pinout matches the DB9S
connector designin orderto decreasethe part
count, reducethe board space required and allow
easy interconnectionofthe UART and serial port
connectorof IBM PC/AT and compatibles. The
bipolar circuits and processingof the ST75185
providesa rugged low-cost solution for this
functionatthe expenseof quiescent power and
external passive components relativeto the
ST75C185.
The ST75185 complies withthe requirementsof
the EIA/TIA 232-E and ITU (formally CCITT) v.28
standards. These standards are for data
interchange betweena host computer and
peripheralat signalling ratesupto 20k-bits/s. The
switching speedsofthe ST75185are fast enough support ratesupto 120K-bits/s with lower
capacitive loads (shorter cables). Interoperabilitythe higher signalling rates cannotbe assured
unless the designer has design controlof the
cable andthe interface circuitsatthe both ends.
For interoperabilityat signalling ratesto 120
K-bits/s, useof EIA/ITA-423-B (ITU v.10) and
EIA/ITA-422-B (ITU v.11) standards are
recommended.
The ST75185is characterizedfor operation over
the rangeof0oCto70oC.
PIN CONNECTION IEC LOGIC SYMBOL AND LOGIC DIAGRAM
ORDER CODES:
ST75185CN ST75185CD
(Micro Package)
(Plastic Package)
1/12
ORDER CODES
Type Temperature Range Package Comments
ST75185CN 0to70oC DIP-20 20 partsper tube/50 tubesperbox
ST75185CD 0to70oC SO-20 (Tube) 40 partsper tube/25 tubesperbox
ST75185CDR 0to70oC SO-20 (Tape& Reel) 1000 partsperreel
PIN DESCRIPTION
PINNo SYMBOL NAME AND FUNCTION
1VDD Supply Voltage (+12V) RA1 First Receiver Input RA2 Second Receiver Input RA3 Third Receiver Input DY1 First Driver Output DY2 Second Driver Output RA4 FourthReceiver Input DY3 Third Driver Output RA5 Fifth Receiver Input VSS Supply Voltage (-12V) GND Ground RY5 Fifth Receiver Output DA3 Third Driver Input RY4 Fourth Receiver Output DA2 Second Driver Input DA1 First Driver Input RY3 Third Receiver Output RY2 Second Receiver Output RY1 First Receiver Output VCC Supply Voltage (+5V)
ST75185
2/12
ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE
(unless otherwise specified)
Symbol Parameter Value Unit
VDD Supply Voltage (Note1) 15 V
VSS Supply Voltage (Note1) -15 V
VCC Supply Voltage (Note1) 10 V Input Voltage Range (DRIVER) -15to7 V Input Voltage Range (RECEIVER) -30to30 V Output Voltage Range (DRIVER) -15to15 V Receiver Low Level Output Current 20 mA Continuous Total Power Dissipation See Dissipation Rating Table Operating Free-Air Temperature Range 0to70 oC
Tstg Storage Temperature Range -65to +150 oC Lead Temperature 1.6mm from casefor10sec 260 oC
AbsoluteMaximumRatingsarethosevalues beyond whichdamage tothedevicemayoccur. Functionaloperationunderthese conditionisnot implied.
NOTE1:Allvoltagearewithrespect tothe network ground terminal.
DISSIPATION RATING TABLE
Package Power RatingTA≤25oC
Derating Factor
aboveTA =25o C(*)
Power RatingTA≤70oC
MICROPACKAGE(D) 1125mW 9.0 mW/oC 720mW
DIP(N) 1150mW 9.2 mW/oC 736mW
(*)This isthereverseofthetraditional junction-case thermalresistanceRtJ-C
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min Max Unit
VDD Supply Voltage 7.5 15 V
VSS Supply Voltage -7.5 -15 V
VCC Supply Voltage 4.5 5.5 V
VIN Driver Input Voltege 0 VCC V
IOH High Level Output Current DRIVER -6 mA
RECEIVER -0.5
IOL Low Level Output Current DRIVER 6 mA
RECEIVER 16 Operating Free-Air Temperature 0 70 oC
ST75185
3/12
SUPPLY CURRENTS
Symbol Parameter Test Conditions Value Unit
VDD VSS Min. Typ. Max.
IDD Supply Current fromVDD 9-9 No load.
All inputsat
1.9V12 -12 19 -15 25
9-9 No load.
All inputsat
0.8V
4.5 mA -12 5.5 -15 9
ISS Supply Current fromVSS 9-9 No load.
All inputsat
1.9V
-1512 -12 -19 -15 -25
9-9 No load.
All inputsat
0.8V
-3.2 mA -12 -3.2 -15 -3.2
ICC Supply Current fromVCC No load.All inputsat5V
VCC =5V mA
DRIVER ELECTRICAL CHARACTERISTICS OVER OPERATING FREE-AIR TEMPERATURE
RANGE (VDD=9V, VSS= -9V, VCC=5V, unlessotherwise specified)
Symbol Parameter Test Conditions Value Unit
Min. Typ. Max.
VOH High Level Output Voltage VIL =0.8V RL =3KΩ
(See Figure1) 7.5 V
VOL Low Level Output Voltage (Note3) VIH =1.9V RL =3KΩ
(See Figure1)
-7.5 -6 V
IIH High Level Input Current VI=5V (See Figure2) 10 μA
IIL Low Level Input Current VI=0V (See Figure2) -1.6 mA
IOS(H) High Level Short Circuit Output Current
(Note4)
VIL =0.8VVO=0V
(See Figure1)
-4.5 -12 -19.5 mA
IOS(L) Low Level Short Circuit Output Current VIH=2VVO=0V
(See Figure1)
4.5 12 19.5 mA Output Resistance VDD =VSS =VCC=0V=-2to2V (Note5)
300 Ω
NOTE3:Thealgebraic convention,wherethemorepositive(less negative) limitisdesignated asmaximum,isusedinthisdatasheet forlogic levelsonly
(e.g.if-10Visa maximum,thetypicalvalueisa morenegativevoltage).
NOTE4:Outputshort circuit conditions mustmantain thetotalpowerdissipation belowabsolutemaximumratings.
NOTE5:Testconditions arethose specified byEIA-232-Eandaslistedabove.
ST75185
4/12
RECEIVERELECTRICAL CHARACTERISTICS OVER OPERATINGCONDITIONS
Symbol Parameter Test Conditions Value Unit
Min. Typ. Max.
VT+ Positive Going Threshold Voltage (See Figure6) 2.2 2.4 V
VT- Negative Going Threshold Voltage TA =25oC (See Figure6) 0.75 0.97 V
Vhys Input Hysteresis (VT+ -VT-) 0.5 V
VOH High Level Output Voltage IOH= -0.5mA VIH= 0.75V 2.6 4 5 V
Inputs Open 2.6
VOL Low Level Output Voltage VI=3V IOL=10mA 0.2 0.45 V
IIH High Level Input Current VI=25V (See Figure6) 3.6 8.3 mA=3V (See Figure6) 0.43
IIL Low Level Input Current VI=-25V (See Figure6) -3.6 -8.3 mA=-3V (See Figure6) -0.43
IOS Short-Circuit Output Current VI=0V VO=0V
(See Figure5)
-3.4 -12 mA
Alltypical valuesareatTA=25o C,VCC=5V,VDD =9VandVSS=-9V
DRIVER SWITCHING CHARACTERISTICS
(VDD= 12V, VSS= -12V, VCC =5VTA =25oC)
Symbol Parameter Test Conditions Value Unit
Min. Typ. Max.
tPLH Propagation Delay Time, Lowto High
Level Output=3to7KΩ CL =15pF
(See Figures3,4)
315 500 ns
tPHL Propagation Delay Time Highto Low
Level Output=3to7KΩ CL =15pF
(See Figures3,4) 175 ns
tTLH Transition Time Lowto High Level
Output=3to7KΩ CL =15pF
(See Figures3,4) 100 ns=3to7KΩ CL =2500pF
(Note6, See Figure3,4)
1.7 2.5 μs
tTHL Transition Time Highto Low Level
Output=3to7KΩ CL =15pF
(See Figure3,4) 7.5 ns=3to7KΩ CL =2500pF
(Note6, See Figure3,4)
1.5 2.5 μs
NOTE6:Measuredbetween-3Vand3Vpointsofoutput waveform (EIA-232-Econditions), allunusedinputsaretied.
RECEIVER SWITCHING CHARACTERISTICS
(VDD= 12V, VSS= -12V, VCC =5VTA =25oC)
Symbol Parameter Test Conditions Value Unit
Min. Typ. Max.
tPLH Propagation Delay Time,Lowto High
Level Output=5KΩ CL =50pF
(See Figure6)
400 1000 ns
tPHL Propagation Delay Time HightoLow
Level Output=5KΩ CL =50pF
(See Figure6) 150 ns
tTLH Transition Time Lowto High Level
Output=5KΩ CL =50pF
(See Figure6)
200 525 ns
tTHL Transition Time Highto Low Level
Output=5KΩ CL =50pF
(See Figure6) 60 ns
ST75185
5/12
APPLICATION CIRCUITSCPU
GND
DCD
DSR
RXD
RTS
TXD
CTS
DTR
Rin1
Rin5
Rin4
Rin3
Rin2
Dout3
Dout2
Dout1
Rout1
Rout5
Rout4
Rout3
Rout2
Din1
Din3
Din2
VssGND
Vcc Vdd
ST75185 8
VccV
Vdd
+12V
Vss
-12V
Dib9 SerialPort Connector
RS232LEVELTTL LEVEL SerialPort
100nF 100nF
100nF
UART
(16550)
DCD38
DSR37
DTR33
TXD11
RXD21
CTS36
RTS3239
FIGURE1: Driver Test Circuitfor VOH,VOL,
ISO(H) and ISO(L)
FIGURE2: Driver Test CircuitforIIH andIIL
ST75185
6/12

Partno	Mfg	Dc	Qty	Available	Descript
ST75185CN	ST ?	N/a	15	avai	MULTIPLE RS-232 DRIVERS AND RECEIVERS