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| ST75185 Multiple RS-232 drivers and receivers General features 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 120kbps Pinout compatible with ST75C185 SO-20 TSSOP20 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 unless the designer has design control of the cable and the interface circuits at the both ends. For interoperability at signalling rates to 120 Kbits/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 0C to 70C. Order code Part number ST75185CTR ST75185CDR Temperature range 0 to 70 C 0 to 70 C Package TSSOP20 (Tape & Reel) SO-20 (Tape & Reel) Packaging 2500 parts per reel 1000 parts per reel June 2006 Rev 16 1/21 www.st.com 21 Contents ST75185 Contents 1 2 3 4 5 6 7 8 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Application information: diodes on power supply . . . . . . . . . . . . . . . . 14 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2/21 ST75185 Pin configuration 1 Figure 1. Pin configuration Pin connection IEC logic symbol and logic diagram Table 1. Pin description Pin N 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 function Supply voltage (+12V) 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) 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) 3/21 Maximum ratings ST75185 2 Table 2. Symbol VDD VSS VCC VI VI VO IO PD TA TSTG TL Maximum ratings Absolute maximum ratings over operating free-air temperature range 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 C C C Unit V V V V V V mA Note: Note: Table 3. Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. 1 All voltage are with respect to the network ground terminal. Dissipation rating table Package Power rating at TA 25C 1125 mW Derating factor (1) above TA = 25C 9.0 mW/C Power rating at TA 70C 720 mW MICROPACKAGE (D) 1. This is the reverse of the traditional junction-case thermal resistance RtJ-C Table 4. Symbol VDD VSS VCC VI IOH Recommended operating conditions Parameter Supply voltage Supply voltage Supply voltage Driver input voltage Driver High level output current Receiver Driver Low level output current Receiver Operating free-air temperature range 0 16 70 C -0.5 6 mA Min 7.5 -7.5 4.5 0 Max 15 -15 5.5 VCC -6 mA Unit V V V V IOL TA 4/21 ST75185 Electrical characteristics 3 Table 5. Symbol Electrical characteristics Supply currents Test Conditions Parameter VDD 9 12 15 IDD Supply current from VDD 9 12 15 9 12 15 ISS Supply current from VSS 9 12 15 ICC Supply current from VCC 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. Typ. Max. 15 19 25 4.5 5.5 9 -15 -19 -25 -3.2 -3.2 -3.2 30 mA mA mA mA mA Value Unit No load. All inputs at 5V VCC = 5V 5/21 Electrical characteristics Table 6. Driver electrical characteristics over operating free-air temperature range (VDD = 9V, VSS = -9V, VCC = 5V, unless otherwise specified) Value Symbol Parameter Test Conditions Min. VOH VOL IIH IIL IOS(H) IOS(L) RO 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 VIL = 0.8 V, RL = 3K (See Figure 3.) VIH = 1.9 V, RL = 3K (See Figure 3.) VI = 5 V (See Figure 4.) VI = 0 V (See Figure 4.) VIL = 0.8 V, VO = 0 V (See Figure 3.) VIH = 2 V VO = 0 V (See Figure 3.) VDD = VSS = VCC = 0 V VO = -2 to 2 V (Note 5) -4.5 4.5 300 - 12 12 6 Typ. 7.5 -7.5 -6 10 - 1.6 - 19.5 19.5 Max. ST75185 Unit V V A mA mA mA W 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). Output short circuit conditions must maintain the total power dissipation below absolute maximum ratings. Test conditions are those specified by EIA-232-E and as listed above. Driver switching characteristics (VDD = 12V, VSS = -12V, VCC = 5V, TA = 25 C) Value Parameter Propagation Delay Time, Low to High Level Output Propagation Delay Time, High to Low Level Output Test Conditions Min. Typ. 315 75 60 1.7 40 1.5 Max. 500 175 100 2.5 7.5 2.5 ns ns ns s ns s RL = 3 to 7 K CL = 15 pF (See Figure 5, Figure 6) RL = 3 to 7 K CL = 15 pF (See Figure 5, Figure 6) RL = 3 to 7 K CL = 15 pF (See Figure 5, Figure 6) RL = 3 to 7 K CL = 2500 pF (Note 6, Figure 5, Figure 6) RL = 3 to 7 K CL = 15 pF (See Figure 5, Figure 6) RL = 3 to 7 K CL = 2500 pF (Note 6, Figure 5, Figure 6) Unit 4 5 Table 7. Symbol tPLH tPHL tTLH Transition Time Low to High Level Output tTHL Transition Time High to Low Level Output 6 Measured between -3V and 3V points of output waveform (EIA-232-E conditions), all unused inputs are tied. 6/21 ST75185 Electrical characteristics Table 8. Symbol VT+ VTVhys VOH VOL IIH Receiver electrical characteristics over operating conditions Value 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 IOH = -0.5mA VI = 3 V VIH = 0.75 V Inputs Open Test Conditions Min. (See Figure 9) TA = 25 C (See Figure 9) 0.75 0.5 2.6 2.6 0.2 3.6 0.43 -3.6 -0.43 -3.4 -12 mA -8.3 mA 0.45 8.3 mA V 4 5 V Typ. 2.2 0.97 Max. 2.4 V V V Unit IOL = 10 mA VI = 25 V (See Figure 9) VI = 3 V (See Figure 9) IIL IOS Low Level Input Current VI = -25 V (See Figure 9) VI = -3 V (See Figure 9) Short-Circuit Output Current VI = 0 V VO = 0 V (See Figure 7) Note: Table 9. All typical values are at TA = 25C, VCC = 5V, VDD = 9V and VSS=-9V Receiver switching characteristics (VDD = 12V, VSS = -12V, VCC = 5V TA = 25C) Value 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 Test Conditions Min. Typ. 400 70 200 20 Max. 1000 150 525 60 ns ns ns ns RL = 5 K CL = 50 pF (See Figure 9) RL = 5 K CL = 50 pF (See Figure 9) RL = 5 K CL = 50 pF (See Figure 9) RL = 5 K CL = 50 pF (See Figure 9) Unit Symbol tPLH tPHL tTLH tTHL 7/21 Typical application ST75185 4 Figure 2. Typical application Application circuits Figure 3. Driver test circuit for VOH, ISO(H) and ISO(L) 8/21 ST75185 Typical application Figure 4. Driver test circuit for IIH and IIL Figure 5. Driver test circuit 9/21 Typical application ST75185 Figure 6. Driver voltage waveforms Figure 7. Receiver test circuit for IOS Figure 8. Receiver test circuit for VT, VOH, VOL 10/21 ST75185 Typical application Figure 9. Receiver test circuit Figure 10. Receiver voltage waveforms Note: 1 2 The pulse generator has the following characteristics: tW = 25s, PRR = 20KHz, ZO = 50 , tr = tf < 50ns CL includes probe and jig capacitance. 11/21 Typical characteristics ST75185 5 Typical characteristics Figure 12. Driver short circuit output current vs. free-air temperature Figure 11. Driver voltage transfer characteristics Figure 13. Device supply current vs temperature Figure 14. Driver output current vs output voltage 12/21 ST75185 Figure 15. Driver output slew rate vs load capacitance Typical characteristics Figure 16. Receiver threshold vs temperature Figure 17. Receiver threshold vs supply voltage 13/21 Application information: diodes on power supply ST75185 6 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). Figure 18. Diodes on power supply 14/21 ST75185 Package mechanical data 7 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com 15/21 Package mechanical data ST75185 SO-20 MECHANICAL DATA DIM. A A1 B C D E e H h L k ddd 10.00 0.25 0.4 0 mm. MIN. 2.35 0.1 0.33 0.23 12.60 7.4 1.27 10.65 0.75 1.27 8 0.100 0.394 0.010 0.016 0 TYP MAX. 2.65 0.30 0.51 0.32 13.00 7.6 MIN. 0.093 0.004 0.013 0.009 0.496 0.291 0.050 0.419 0.030 0.050 8 0.004 inch TYP. MAX. 0.104 0.012 0.020 0.013 0.512 0.299 0016022D 16/21 ST75185 Package mechanical data TSSOP20 MECHANICAL DATA mm. DIM. MIN. A A1 A2 b c D E E1 e K L 0 0.45 0.60 0.05 0.8 0.19 0.09 6.4 6.2 4.3 6.5 6.4 4.4 0.65 BSC 8 0.75 0 0.018 0.024 1 TYP MAX. 1.2 0.15 1.05 0.30 0.20 6.6 6.6 4.48 0.002 0.031 0.007 0.004 0.252 0.244 0.169 0.256 0.252 0.173 0.0256 BSC 8 0.030 0.004 0.039 MIN. TYP. MAX. 0.047 0.006 0.041 0.012 0.0079 0.260 0.260 0.176 inch A A2 A1 b e K c L E D E1 PIN 1 IDENTIFICATION 1 0087225C 17/21 Package mechanical data ST75185 Tape & Reel SO-20 MECHANICAL DATA mm. DIM. MIN. A C D N T Ao Bo Ko Po P 10.8 13.2 3.1 3.9 11.9 12.8 20.2 60 30.4 11 13.4 3.3 4.1 12.1 0.425 0.520 0.122 0.153 0.468 TYP MAX. 330 13.2 0.504 0.795 2.362 1.197 0.433 0.528 0.130 0.161 0.476 MIN. TYP. MAX. 12.992 0.519 inch 18/21 ST75185 Package mechanical data Tape & Reel TSSOP20 MECHANICAL DATA mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.8 6.9 1.7 3.9 11.9 12.8 20.2 60 22.4 7 7.1 1.9 4.1 12.1 0.268 0.272 0.067 0.153 0.468 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.276 0.280 0.075 0.161 0.476 MIN. TYP. MAX. 12.992 0.519 inch 19/21 Revision history ST75185 8 Table 10. Date Revision history Revision history Revision 15 16 Changes Order codes has been updated and new template. 28-Apr-2006 01-Jun-2006 Figure 2. updated. 20/21 ST75185 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST's terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST'S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. 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