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| (R) ST75185 MULTIPLE RS-232 DRIVERS AND RECEIVERS s s s s MEETS AND EXCEEDS THE REQUIREMENTS OF EIA/TIA-232-E AND ITUV.28 STANDARD SINGLE CHIP WITH EASY INTERFACE BETWEEN UART AND SERIAL PORT CONNECTOR OF IBM PC/ATTM AND COMPATIBLES DESIGNED TO SUPPORT DATA RATES UP TO 120 Kbps PINOUT COMPATIBLE WITH ST75C185 N D (Plastic Package) (Micro Package) ORDER CODES : ST75185CN ST75185CD standards. These standards are for data interchange between a host computer and peripheral at signalling rates up to 20k-bits/s. The switching speeds 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 0oC to 70oC. DESCRIPTION The ST75185 contains three drivers and five receivers. The pinout matches the DB9S connector design in order to decrease the part count, reduce the board space required and allow easy interconnection of the UART and serial port connector of IBM PC/ATTM 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 (formally CCITT) v.28 PIN CONNECTION IEC LOGIC SYMBOL AND LOGIC DIAGRAM February 1999 1/12 ST75185 ORDER CODES T ype ST75185CN ST75185CD ST75185CDR T emp eratu re Range 0 to 70 oC 0 to 70 oC 0 to 70 C o Package DIP-20 SO-20 (Tube) SO-20 (Tape & Reel) Comments 20 parts per tube / 50 tubes per box 40 parts per tube / 25 tubes per box 1000 parts per reel PIN DESCRIPTION PIN No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 SYMBOL VDD RA1 RA2 RA3 DY1 DY2 RA4 DY3 RA5 VSS GND RY5 DA3 RY4 DA2 DA1 RY3 RY2 RY1 VCC NAME AND F UNCTIO N Supply Voltage (+12V) First Receiver Input Second Receiver Input Third Receiver Input First Driver Output Second Driver Output FourthReceiver Input Third Driver Output Fifth Receiver Input Supply Voltage (-12V) Ground Fifth Receiver Output Third Driver Input Fourth Receiver Output Second Driver Input First Driver Input Third Receiver Output Second Receiver Output First Receiver Output Supply Voltage (+5V) 2/12 ST75185 ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE (unless otherwise specified) Symbol VDD VSS VCC VI VI VO IO PD TA Tstg TL Parameter Supply Voltage (Note 1) Supply Voltage (Note 1) Supply Voltage (Note 1) Input Voltage Range (DRIVER) Input Voltage Range (RECEIVER) Output Voltage Range (DRIVER) Receiver Low Level Output Current Continuous Total Power Dissipation Operating Free-Air Temperature Range Storage Temperature Range Lead Temperature 1.6mm from case for 10 sec Value 15 -15 10 -15 to 7 -30 to 30 -15 to 15 20 See Dissipation Rating Table 0 to 70 -65 to +150 260 o o o Unit V V V V V V mA C C C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. NOTE1:All voltage are with respect to the network ground terminal. DISSIPATION RATING TABLE Packag e MICROPACKAGE (D) DIP (N) Po wer Rating at TA 25 o C 1125 mW 1150 mW Derating Factor above TA = 25 oC (*) 9.0 mW/oC 9.2 mW/oC Po wer Rating at TA 70 o C 720 mW 736 mW (*) This is the reverse of the traditional junction-case thermal resistance RtJ-C RECOMMENDED OPERATING CONDITIONS Symbol VDD VSS VCC VIN IOH IOL TA Supply Voltage Supply Voltage Supply Voltage Driver Input Voltege High Level Output Current Low Level Output Current Operating Free-Air Temperature DRIVER RECEIVER DRIVER RECEIVER 0 Parameter Min 7.5 -7.5 4.5 0 Max 15 -15 5.5 VCC -6 -0.5 6 16 70 o Unit V V V V mA mA C 3/12 ST75185 SUPPLY CURRENTS Symb ol IDD Parameter VDD Supply Current from VDD 9 12 15 9 12 15 ISS Supply Current from VSS 9 12 15 9 12 15 ICC Supply Current from VCC Test Con dition s VSS -9 -12 -15 -9 -12 -15 -9 -12 -15 -9 -12 -15 No load. All inputs at 1.9V No load. All inputs at 0.8V No load. All inputs at 1.9V No load. All inputs at 0.8V Min . Value T yp. Max. 15 19 25 4.5 5.5 9 -15 -19 -25 -3.2 -3.2 -3.2 30 mA mA mA mA mA Un it No load. All inputs at 5V VCC = 5V DRIVER ELECTRICAL CHARACTERISTICS OVER OPERATING FREE-AIR TEMPERATURE RANGE (VDD = 9V, VSS = -9V, VCC = 5V, unless otherwise specified) Symb ol VOH VOL IIH IIL IOS(H) IOS(L) RO Parameter High Level Output Voltage Low Level Output Voltage (Note 3) High Level Input Current Low Level Input Current High Level Short Circuit Output Current (Note 4) Low Level Short Circuit Output Current Output Resistance Test Con dition s Min . VIL = 0.8 V R L = 3K (See Figure 1) VIH = 1.9 V R L = 3K (See Figure 1) VI = 5 V (See Figure 2) VI = 0 V (See Figure 2) VIL = 0.8 V VO = 0 V (See Figure 1) VIH = 2 V V O = 0 V (See Figure 1) VDD = VSS = VCC = 0 V VO = -2 to 2 V (Note 5) -4.5 4.5 300 -12 12 6 Value T yp. 7.5 -7.5 -6 10 -1.6 -19.5 19.5 Max. V V A mA mA mA Un it NOTE 3: The algebraic convention, where the more positive (less negative) limitis designated as maximum, is used in this datasheet for logic levels only (e.g. if -10V is a maximum, the typical value is a more negative voltage). NOTE 4: Output short circuit conditions must mantain the total power dissipation below absolute maximum ratings. NOTE 5: Testconditions are those specified by EIA-232-E and as listed above. 4/12 ST75185 DRIVER SWITCHING CHARACTERISTICS (VDD = 12V, VSS = -12V, VCC = 5V TA = 25 oC) Symb ol tPLH tPHL tTLH Parameter Propagation Delay Time, Low to High Level Output Propagation Delay Time High to Low Level Output Transition Time Low to High Level Output Test Con dition s Min . R L = 3 to 7 K CL = 15 pF (See Figures 3, 4) R L = 3 to 7 K CL = 15 pF (See Figures 3, 4) R L = 3 to 7 K CL = 15 pF (See Figures 3, 4) R L = 3 to 7 K CL = 2500 pF (Note 6, See Figure 3, 4) tTHL Transition Time High to Low Level Output R L = 3 to 7 K CL = 15 pF (See Figure 3, 4) R L = 3 to 7 K CL = 2500 pF (Note 6, See Figure 3, 4) NOTE 6: Measured between -3V and 3V points of output waveform (EIA-232-E conditions), all unused inputs are tied. Value T yp. 315 75 60 1.7 40 1.5 Max. 500 175 100 2.5 7.5 2.5 Un it ns ns ns s ns s RECEIVER ELECTRICAL CHARACTERISTICS OVER OPERATING CONDITIONS Symb ol VT+ VTVhys VOH VOL IIH IIL IOS Parameter Positive Going Threshold Voltage Negative Going Threshold Voltage Input Hysteresis (VT+ - VT-) High Level Output Voltage Low Level Output Voltage High Level Input Current Low Level Input Current Short-Circuit Output Current IOH = -0.5mA VI = 3 V VI = 25 V VI = 3 V VI = -25 V VI = -3 V V IH = 0.75 V Inputs Open IOL = 10 mA (See Figure 6) (See Figure 6) (See Figure 6) (See Figure 6) 3.6 0.43 -3.6 -0.43 -3.4 -12 mA -8.3 mA Test Con dition s Min . (See Figure 6) TA = 25 oC (See Figure 6) 0.75 0.5 2.6 2.6 0.2 0.45 8.3 4 5 Value T yp. 2.2 0.97 Max. 2.4 V V V V V mA Un it VI = 0 V VO = 0 V (See Figure 5) Alltypical values are at TA = 25 oC, VCC = 5V, VDD = 9Vand VSS = -9V RECEIVER SWITCHING CHARACTERISTICS (VDD = 12V, VSS = -12V, VCC = 5V TA = 25 oC) Symbo l tPLH tPHL tTLH tTHL Parameter Propagation Delay Time, Low to High Level Output Propagation Delay Time High to Low Level Output Transition Time Low to High Level Output Transition Time High to Low Level Output T est Cond ition s Min. R L = 5 K CL = 50 pF (See Figure 6) R L = 5 K CL = 50 pF (See Figure 6) R L = 5 K CL = 50 pF (See Figure 6) R L = 5 K CL = 50 pF (See Figure 6) Value Typ . 400 70 200 20 Max. 1000 150 525 60 ns ns ns ns Unit 5/12 ST75185 APPLICATION CIRCUITS TTL LEVEL Vdd +12 V ST75185 Vcc +5 V RS232 LEVEL PC Serial Port 1 100nF 20 100nF Vcc Rout1 Rout2 Rout3 Din1 Vdd Rin1 2 1 DCD 38 DSR 37 RXD 21 19 Rin2 3 DCD DSR 4 18 6 2 7 3 8 4 9 5 Rin3 Dout1 5 17 UART RTS (16550) RXD CL 6 7 32 16 Din2 15 Dout2 Rin4 Dout3 8 RTS CL TXD 11 CTS 36 DTR 33 Rout4 14 TXD CTS CL DTR RI Din3 13 Rout5 Rin5 9 RI 39 12 11 GND Vss 10 100nF GND Vss -12V DB9S Serial Port Connector To CPU BUS FIGURE 1: Driver Test Circuit for VOH, VOL, ISO(H) and ISO(L) FIGURE 2: Driver Test Circuitfor IIH and IIL 6/12 ST75185 FIGURE 3:Driver Test Circuit FIGURE 4: Driver Voltage Waveforms FIGURE 5: Receiver Test Circuit for IOS FIGURE 6: Receiver Test Circuit for VT, VOH, VOL FIGURE 7: Receiver Test Circuit FIGURE 8: Receiver Voltage Waveforms NOTE A: The pulse generator has the following characteristics: tW = 25 s,PRR = 20 KHz, ZO = 50 , tr = tf < 50ns. NOTE B: CL includes probe and jig capacitance. 7/12 ST75185 Driver Voltage Transfer Characteristics Driver Output Current vs Output Voltage Driver Short Circuit Output Current vs Free-Air Temperature Driver Output Slew Rate vs Load Capacitance Device Supply Current vs Temperature Receiver Threshold vs Temperature 8/12 ST75185 Receiver Threshold vs Supply Voltage APPLICATION INFORMATION: DIODES ON POWER SUPPLY Diodes placed in series with the VDD and VSS leads protect the ST75185 in the fault condition in which the devices output are shorted to 15V and the power supplies are at low state and provide low-impedance path to ground (see Figure below) +VDD Output ST75185 Output ST75185 Output shorted to 15V -VSS Low impedance in the power off condition. 9/12 ST75185 Plastic DIP-20 (0.25) MECHANICAL DATA mm MIN. a1 B b b1 D E e e3 F I L Z 3.3 1.34 8.5 2.54 22.86 7.1 3.93 0.130 0.053 0.254 1.39 0.45 0.25 25.4 0.335 0.100 0.900 0.280 0.155 1.65 TYP. MAX. MIN. 0.010 0.055 0.018 0.010 1.000 0.065 inch TYP. MAX. DIM. P001J 10/12 ST75185 SO-20 MECHANICAL DATA DIM. MIN. A a1 a2 b b1 C c1 D E e e3 F L M S 7.40 0.50 12.60 10.00 1.27 11.43 7.60 1.27 0.75 8 (max.) 0.291 0.19 13.00 10.65 0.35 0.23 0.50 45 (typ.) 0.496 0.393 0.050 0.450 0.299 0.050 0.029 0.512 0.419 0.10 mm TYP. MAX. 2.65 0.20 2.45 0.49 0.32 0.013 0.009 0.020 0.004 MIN. inch TYP. MAX. 0.104 0.007 0.096 0.019 0.012 P013L 11/12 ST75185 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a trademark of STMicroelectronics (c) 1999 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. http://www.st.com . 12/12 |
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