ST75285 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 TSSOP DESCRIPTION The ST75285 contains six drivers and ten 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 ST75285 provides a rugged low-cost solution for this function at the expense of quiescent power and external passive components relative to the ST75C185. The ST75285 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 ST75285 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. It allows space saving in applications where two ST75185 are needed. ORDERING CODES Type Temperature Range Package Comments ST75285CTR 0 to 70 °C TSSOP38 (Tape & Reel) 2500 parts per reel December 2002 1/13 ST75285 PIN DESCRIPTION PlN N° NAME AND FUNCTION 1 VDD Supply Voltage (+12V) 2 3 4 5 6 7 8 9 RIN1 RIN2 RIN3 TOUT1 TOUT2 RIN4 TOUT3 RIN5 VCC 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) Sixth Receiver Input Fourth Driver Output Seventh Receiver Input Fifth Driver Output Sixth Driver Output Eighth Receiver Input Nineth Receiver Input Tenth Receiver Input Supply Voltage (-12V) 10 11 12 13 14 15 16 17 18 2/13 SYMBOL 19 RIN6 TOUT4 RIN7 TOUT5 TOUT6 RIN8 RIN9 RIN10 VDD 20 VSS 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 ROUT10 ROUT9 ROUT8 TIN6 TIN5 ROUT7 TIN4 ROUT6 GND ROUT5 TIN3 ROUT4 TIN2 TIN1 ROUT3 ROUT2 ROUT1 VSS Supply Voltage (+5V) Tenth Receiver Ouput Nineth Receiver Ouput Eighth Receiver Ouput Sixth Driver Input Fifth Driver Input Seventh Receiver Ouput Fourth Driver Input Sixth Receiver Output Ground Fifth Receiver Output Third Driver Input Fourth Receiver Output Second Driver Input First Driver Input Third Receiver Ouput Second Receiver Ouput First Receiver Ouput Supply Voltage (+5V) ST75285 PIN CONNECTION IEC LOGIC SYMBOL AND LOGIC DIAGRAM ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE Symbol Parameter Value Unit VDD Supply Voltage (Note 1) -0.3 to 15 V VSS Supply Voltage (Note 1) 0.3 to -15 V VCC Supply Voltage (Note 1) -0.3 to 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 IO Receiver Low Level Output Current 20 mA PD Continuous Total Power Dissipation See dissipation Rating Table TA Operating Free-Air Tempereature Range 0 to 70 °C Tstg Storage Temperature Range -65 to + 150 °C ESD Human Body Model >2 kV Lead Temperature 1.6mm from case for 10 sec 260 °C TL 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 ≤ 85°C TSSOP (T) 1277 mW 10.2 mW/°C 644 mW (*) This is the reverse of the traditional junction-case thermal resistance RtJ-C 3/13 ST75285 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 DRIVER RECEIVER DRIVER RECEIVER Low Level Output Current -6 -0.5 6 16 Operating Free-Air Tempereature 0 mA mA 70 °C 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. 22 28 32 9 11 12 -22 -28 -32 -6.4 -6.4 -6.4 60 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 VOH High Level Output Voltage VOL IIH Low Level Output Voltage (Note 3) High Level Input Current IIL Low Level Input Current VI = 0 V (See Figure 2) 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 VIL = 0.8 V RL = 3KΩ (See Figure 1) VIH = 1.9 V RL = 3KΩ (See Figure 1) Unit Min. Typ. 6 7.5 -7.5 VI = 5 V (See Figure 2) 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) Max. V -6 V 10 µA −1.6 mA -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. 4/13 ST75285 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. 200 400 ns 50 100 ns 60 100 ns 1.7 2.5 µs 50 100 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. VT+ Positive Going Threshold Voltage (See Figure 6) TA = 25 °C (See Figure 6) VT- Negative Going Threshold Voltage Vhys Input Hysteresis (VT+ - VT-) 0.75 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 Typ. Max. 2.2 2.4 0.97 V 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 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 200 500 ns 50 pF 60 120 ns 50 pF 200 525 ns 50 pF 20 60 ns 5/13 ST75285 Figure 1 : Driver Test Circuit for VOH, ISO(H) and ISO(L) Figure 2 : Driver Test Circuit for IIH and IIL Figure 3 : Driver Test Circuit 6/13 ST75285 Figure 4 : Driver Voltage Waveforms Figure 5 : Receiver Test Circuit for IOS Figure 6 : Receiver Test Circuit for VT, VOH, VOL 7/13 ST75285 Figure 7 : Receiver Test Circuit 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. 8/13 ST75285 Figure 9 : Driver Voltage Transfer Characteristics Figure 12 : Driver Output Current vs Output Voltage Figure 10 : Driver Short Circuit Output Current vs Free-Air Temperature Figure 13 : Driver Output Slew Rate vs Load Capacitance Figure 11 : Receiver Threshold vs Supply Voltage Figure 14 : Receiver Threshold vs Temperature 9/13 ST75285 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). 10/13 ST75285 TSSOP38 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. A MIN. TYP. 1.2 A1 0.05 A2 0.8 b MAX. 0.047 0.15 0.002 1.05 0.031 0.17 0.27 0.0067 0.011 c 0.09 0.20 0.0035 0.0079 D 9.6 9.7 9.8 0.378 0.381 0.385 E 6.2 6.4 6.6 0.244 0.252 0.260 E1 4.3 4.4 4.5 0.169 0.173 0.177 1 e 0.006 0.039 0.5 K 0˚ L 0.50 A 0.041 0.0197 0.6 8˚ 0˚ 0.75 0.020 8˚ 0.023 0.030 A2 A1 b K e L E c D E1 PIN 1 IDENTIFICATION 1 0117861/B 11/13 ST75285 Tape & Reel TSSOP38 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 12/13 TYP 0.504 22.4 0.519 0.882 Ao 6.8 7 0.268 0.276 Bo 10.1 10.3 0.398 0.406 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 ST75285 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. 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 registered trademark of STMicroelectronics © 2002 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. © http://www.st.com 13/13