ST75185 MULTIPLE RS-232 DRIVERS AND RECEIVERS ■ ■ ■ ■ 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 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 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 SOP TSSOP SSOP 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°C to 70°C. ORDERING CODES Type ST75185CTR ST75185CD ST75185CDR ST75185CPR December 2002 Temperature Range 0 0 0 0 to 70 to 70 to 70 to 70 °C °C °C °C Package Comments TSSOP20 (Tape & Reel) SO-20 (Tube) SO-20 (Tape & Reel) SSOP-20 (Tape & Reel) 2500 parts per reel 40 parts per tube / 25 tubes per box 1000 parts per reel 1350 parts per reel 1/18 ST75185 PIN CONNECTION IEC LOGIC SYMBOL AND LOGIC DIAGRAM PIN DESCRIPTION 2/18 PlN N° SYMBOL NAME AND FUNCTION 1 VDD Supply Voltage (+12V) 2 3 4 5 6 7 8 9 10 RA1 RA2 RA3 DY1 DY2 RA4 DY3 RA5 VSS First Receiver Input Second Receiver Input Third Receiver Input First Driver Output Second Driver Output Fourth Receiver Input Third Driver Output Fifth Receiver Input Supply Voltage (-12V) 11 12 13 14 15 16 17 18 19 20 GND RY5 DA3 RY4 DA2 DA1 RY3 RY2 RY1 VCC Ground Fifth Receiver Ouput Third Driver Intput Fourth Receiver Ouput Second Driver Input First Driver Input Third Receiver Ouput Second Receiver Output First Receiver Output Supply Voltage (+5V) ST75185 ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE Symbol Parameter Value Unit VDD Supply Voltage (Note 1) 15 V VSS Supply Voltage (Note 1) -15 V VCC Supply Voltage (Note 1) 10 V VI Input Voltage Range (DRIVER) -15 to 7 V VI Input Voltage Range (RECEIVER) -30 to 30 V VO Output Voltage Range (DRIVER) -15 to 15 V mA IO Receiver Low Level Output Current 20 PD Continuous Total Power Dissipation See dissipation Rating Table TA Operating Free-Air Tempereature Range Tstg Storage Temperature Range TL Lead Temperature 1.6mm from case for 10 sec 0 to 70 °C -65 to + 150 °C 260 °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. NOTE 1: All voltage are with respect to the network ground terminal. DISSIPATION RATING TABLE Package Power Rating at TA ≤ 25°C Derating Factor above TA = 25°C (*) Power Rating at TA ≤ 70°C MICROPACKAGE (D) 1125 mW 9.0 mW/°C 720 mW (*) This is the reverse of the traditional junction-case thermal resistance RtJ-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 0 VCC V VI IOH IOL TA Driver Input Voltage High Level Output Current Low Level Output Current Operating Free-Air Tempereature Range DRIVER RECEIVER DRIVER RECEIVER -6 -0.5 6 16 0 70 mA mA °C 3/18 ST75185 SUPPLY CURRENTS Test Conditions Symbol IDD ISS ICC Parameter Supply Current from VDD Supply Current from VSS Supply Current from VCC VDD VSS Value Unit Min. Typ. 9 -9 No load. All inputs at 12 -12 1.9V 15 -15 9 -9 No load. All inputs at 12 -12 0.8V 15 -15 9 -9 No load. All inputs at 12 -12 1.9V 15 -15 9 -9 No load. All inputs at 12 -12 0.8V 15 -15 No load. All inputs at 5V VCC = 5V Max. 15 19 25 4.5 5.5 9 -15 -19 -25 -3.2 -3.2 -3.2 30 mA mA mA mA mA DRIVER ELECTRICAL CHARACTERISTICS OVER OPERATING FREE-AIR TEMPERATURE RANGE (VDD = 9V, VSS = -9V, VCC = 5V, unless otherwise specified) Value Symbol Parameter Test Conditions Unit Min. Max. VOH High Level Output Voltage VIL = 0.8 V RL = 3KΩ (See Figure 1) VOL VIH = 1.9 V RL = 3KΩ (See Figure 1) IIH Low Level Output Voltage (Note 3) High Level Input Current VI = 5 V (See Figure 2) 10 µA IIL Low Level Input Current VI = 0 V (See Figure 2) −1.6 mA IOS(H) High Level Short Circuit Output Current (Note 4) Low Level Short Circuit Output Current Output Resistance VIL = 0.8 V IOS(L) RO VIH = 2 V VO = 0 V (See Figure 1) VO = 0 V (See Figure 1) VDD = VSS = VCC = 0 V VO = -2 to 2 V (Note 5) 6 Typ. 7.5 -7.5 V -6 V -4.5 −12 −19.5 mA 4.5 12 19.5 mA 300 Ω NOTE 3: The algebraic convention, where the more positive (less negative) limits 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 maintain the total power dissipation below absolute maximum ratings. NOTE 5: Test conditions are those specified by EIA-232-E and as listed above. 4/18 ST75185 DRIVER SWITCHING CHARACTERISTICS (VDD = 12V, VSS = -12V, VCC = 5V, TA = 25 °C) Value Symbol Parameter Test Conditions Unit Min. tPLH tPHL tTLH tTHL Propagation Delay Time, Low to High RL = 3 to 7 KΩ CL = 15 pF Level Output (See Figure 3, 4) Propagation Delay Time, High to Low RL = 3 to 7 KΩ CL = 15 pF Level Output (See Figure 3, 4) Transition Time Low to High Level RL = 3 to 7 KΩ CL = 15 pF Output (See Figure 3, 4) RL = 3 to 7 KΩ CL = 2500 pF (Note 6, See Figure 3, 4) Transition Time High to Low Level RL = 3 to 7 KΩ CL = 15 pF Output (See Figure 3, 4) RL = 3 to 7 KΩ CL = 2500 pF (Note 6, See Figure 3, 4) Typ. Max. 315 500 ns 75 175 ns 60 100 ns 1.7 2.5 µs 40 7.5 ns 1.5 2.5 µs NOTE 6: Measured between -3V and 3V points of output waveform (EIA-232-E conditions), all unused inputs are tied. RECEIVER ELECTRICAL CHARACTERISTICS OVER OPERATING CONDITIONS Value Symbol Parameter Test Conditions Unit Min. Typ. Max. 2.2 2.4 0.75 0.97 VT+ Positive Going Threshold Voltage (See Figure 6) VT- Negative Going Threshold Voltage TA = 25 °C (See Figure 6) Vhys Input Hysteresis (VT+ - VT-) VOH High Level Output Voltage IOH = -0.5mA VOL Low Level Output Voltage VI = 3 V IIH High Level Input Current VI = 25 V (See Figure 6) 3.6 VI = 3 V IIL Low Level Input Current IOS Short-Circuit Output Current 0.5 VIH = 0.75 V 2.6 Inputs Open IOL = 10 mA 2.6 (See Figure 6) 0.43 VI = -25 V (See Figure 6) -3.6 VI = -3 V -0.43 (See Figure 6) VI = 0 V VO = 0 V (See Figure 5) V V V 4 5 0.2 0.45 V 8.3 mA -8.3 mA -12 mA -3.4 V All typical values are at TA = 25°C, VCC = 5V, VDD = 9V and VSS=-9V RECEIVER SWITCHING CHARACTERISTICS (VDD = 12V, VSS = -12V, VCC = 5V TA = 25°C) Value Symbol Parameter Test Conditions Unit Min. tPLH tPHL tTLH tTHL Propagation Delay Time Low to High RL = 5 KΩ CL = Level Output (See Figure 6) Propagation Delay Time High to Low RL = 5 KΩ CL = Level Output (See Figure 6) Transition Time Low to High Level RL = 5 KΩ CL = Output (See Figure 6) Transition Time High to Low Level RL = 5 KΩ CL = Output (See Figure 6) Typ. Max. 50 pF 400 1000 ns 50 pF 70 150 ns 50 pF 200 525 ns 50 pF 20 60 ns 5/18 ST75185 APPLICATION CIRCUITS Figure 1 : Driver Test Circuit for VOH, ISO(H) and ISO(L) 6/18 ST75185 Figure 2 : Driver Test Circuit for IIH and IIL Figure 3 : Driver Test Circuit Figure 4 : Driver Voltage Waveforms 7/18 ST75185 Figure 5 : Receiver Test Circuit for IOS Figure 6 : Receiver Test Circuit for VT, VOH, VOL Figure 7 : Receiver Test Circuit 8/18 ST75185 Figure 8 : Receiver Voltage Waveforms NOTE A: The pulse generator has the following characteristics: tW = 25µs, PRR = 20KHz, ZO = 50 Ω, tr = tf < 50ns NOTE B: CL includes probe and jig capacitance. Figure 9 : Driver Voltage Transfer Characteristics Figure 11 : Device Supply Current vs Temperature Figure 10 : Driver Short Circuit Output Current vs Free-Air Temperature Figure 12 : Driver Output Current vs Output Voltage 9/18 ST75185 Figure 13 : Driver Output Slew Rate vs Load Capacitance Figure 14 : Receiver Threshold vs Temperature 10/18 Figure 15 : Receiver Threshold vs Supply Voltage ST75185 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). 11/18 ST75185 SO-20 MECHANICAL DATA mm. inch DIM. MIN. TYP A a1 MAX. MIN. TYP. 2.65 0.1 0.104 0.2 a2 MAX. 0.004 0.008 2.45 0.096 b 0.35 0.49 0.014 0.019 b1 0.23 0.32 0.009 0.012 C 0.5 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 0.300 L 0.50 1.27 0.020 0.050 M S 0.75 0.029 8˚ (max.) PO13L 12/18 ST75185 SSOP20 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. A MIN. TYP. MAX. 2 A1 0.05 A2 1.65 b 0.079 0.002 1.75 1.85 0.065 0.22 0.38 0.009 0.015 c 0.09 0.25 0.004 0.010 D 6.9 7.2 7.5 0.272 0.283 0.295 E 7.4 7.8 8.2 0.291 0.307 0.323 E1 5 5.3 5.6 0.197 0.209 0.220 e 0.069 0.65 BSC 0.073 0.0256 BSC K 0˚ 4˚ 8˚ 0˚ 4˚ 8˚ L 0.55 0.75 0.95 0.022 0.030 0.037 A A2 A1 b K e L E c D E1 PIN 1 IDENTIFICATION 1 0061436C 13/18 ST75185 TSSOP20 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. A MIN. TYP. MAX. 1.2 A1 0.05 A2 0.8 b 0.047 0.15 0.002 0.004 0.006 1.05 0.031 0.039 0.041 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0079 D 6.4 6.5 6.6 0.252 0.256 0.260 E 6.2 6.4 6.6 0.244 0.252 0.260 E1 4.3 4.4 4.48 0.169 0.173 0.176 1 e 0.65 BSC K 0˚ L 0.45 A 0.0256 BSC 0.60 8˚ 0˚ 0.75 0.018 8˚ 0.024 0.030 A2 A1 b K e L E c D E1 PIN 1 IDENTIFICATION 1 0087225C 14/18 ST75185 Tape & Reel SO-20 MECHANICAL DATA mm. inch DIM. MIN. A TYP MAX. MIN. 330 MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 TYP. 0.504 30.4 0.519 1.197 Ao 10.8 11 0.425 0.433 Bo 13.2 13.4 0.520 0.528 Ko 3.1 3.3 0.122 0.130 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 15/18 ST75185 Tape & Reel SSOP20 MECHANICAL DATA mm. inch DIM. MIN. A MAX. MIN. 330 13.2 TYP. MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 16/18 TYP 0.504 22.4 0.519 0.882 Ao 8.4 8.6 0.331 0.339 Bo 7.7 7.9 0.303 0.311 Ko 2.9 3.1 0.114 0.122 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 ST75185 Tape & Reel TSSOP20 MECHANICAL DATA mm. inch DIM. MIN. A TYP MAX. MIN. 330 MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 TYP. 0.504 22.4 0.519 0.882 Ao 6.8 7 0.268 0.276 Bo 6.9 7.1 0.272 0.280 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 17/18 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. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. 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