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ST75285
MULTIPLE RS-232 DRIVERS AND RECEIVERS
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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 ORDERING CODES
Type ST75285CTR Temperature Range 0 to 70 C Package
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.
Comments 2500 parts per reel
TSSOP38 (Tape & Reel)
December 2002
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PIN DESCRIPTION
PlN N 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 SYMBOL VDD RIN1 RIN2 RIN3 TOUT1 TOUT2 RIN4 TOUT3 RIN5 VCC RIN6 TOUT4 RIN7 TOUT5 TOUT6 RIN8 RIN9 RIN10 VDD VSS ROUT10 ROUT9 ROUT8 TIN6 TIN5 ROUT7 TIN4 ROUT6 GND ROUT5 TIN3 ROUT4 TIN2 TIN1 ROUT3 ROUT2 ROUT1 VSS 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) 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) 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)
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PIN CONNECTION IEC LOGIC SYMBOL AND LOGIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE
Symbol VDD VSS VCC VI VI VO IO PD TA Tstg ESD TL 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 Tempereature Range Storage Temperature Range Human Body Model Lead Temperature 1.6mm from case for 10 sec Parameter Value -0.3 to 15 0.3 to -15 -0.3 to 10 -15 to 7 -30 to 30 -15 to 15 20 See dissipation Rating Table 0 to 70 -65 to + 150 >2 260 C C kV C Unit V V V V V V mA
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 TSSOP (T) Power Rating at TA 25C 1277 mW Derating Factor above TA = 25C (*) 10.2 mW/C Power Rating at TA 85C 644 mW
(*) This is the reverse of the traditional junction-case thermal resistance RtJ-C
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RECOMMENDED OPERATING CONDITIONS
Symbol VDD VSS VCC VI IOH IOL TA Supply Voltage Supply Voltage Supply Voltage Driver Input Voltage High Level Output Current Low Level Output Current Operating Free-Air Tempereature 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 Unit V V V V mA mA C
SUPPLY CURRENTS
Test Conditions Symbol IDD Parameter Supply Current from VDD VDD VSS Min. Value Unit Typ. Max. 22 28 32 9 11 12 -22 -28 -32 -6.4 -6.4 -6.4 60 mA
ISS
Supply Current from VSS
ICC
Supply Current from VCC
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
mA
mA
mA
mA
DRIVER ELECTRICAL CHARACTERISTICS OVER OPERATING FREE-AIR TEMPERATURE RANGE (VDD = 9V, VSS = -9V, VCC = 5V, unless otherwise specified)
Value Symbol 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 Conditions Min. VIL = 0.8 V RL = 3K (See Figure 1) VIH = 1.9 V RL = 3K (See Figure 1) VI = 5 V (See Figure 2) VI = 0 V (See Figure 2) VIL = 0.8 V VIH = 2 V VO = 0 V (See Figure 1) VO = 0 V (See Figure 1) -4.5 4.5 300 -12 12 6 Typ. 7.5 -7.5 -6 10 -1.6 -19.5 19.5 Max. V V A mA mA mA Unit
VDD = VSS = VCC = 0 V VO = -2 to 2 V (Note 5)
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.
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ST75285
DRIVER SWITCHING CHARACTERISTICS (VDD = 12V, VSS = -12V, VCC = 5V, TA = 25 C)
Value Symbol tPLH tPHL tTLH Parameter Test Conditions Min. Propagation Delay Time, Low to High RL = 3 to 7 K CL = 15 pF Level Output (See Figure 3, 4) Propagation Delay Time, High to Low RL = 3 to 7 K CL = 15 pF Level Output (See Figure 3, 4) Transition Time Low to High Level RL = 3 to 7 K CL = 15 pF Output (See Figure 3, 4) RL = 3 to 7 K CL = 2500 pF (Note 6, See Figure 3, 4) Transition Time High to Low Level RL = 3 to 7 K CL = 15 pF Output (See Figure 3, 4) RL = 3 to 7 K CL = 2500 pF (Note 6, See Figure 3, 4) Typ. 200 50 60 1.7 50 1.5 Max. 400 100 100 2.5 100 2.5 ns ns ns s ns s Unit
tTHL
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 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 = 3 V VI = -3 V VIH = 0.75 V Inputs Open IOL = 10 mA (See Figure 6) (See Figure 6) Test Conditions Min. (See Figure 6) TA = 25 C (See Figure 6) 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 V mA 4 5 Typ. 2.2 0.97 Max. 2.4 V V V V Unit
VI = 25 V (See Figure 6) VI = -25 V (See Figure 6) VI = 0 V VO = 0 V (See Figure 5)
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 Symbol tPLH tPHL tTLH tTHL Parameter Test Conditions Min. Propagation Delay Time Low to High RL = 5 K CL = Level Output (See Figure 6) Propagation Delay Time High to Low RL = 5 K CL = Level Output (See Figure 6) Transition Time Low to High Level RL = 5 K CL = Output (See Figure 6) Transition Time High to Low Level RL = 5 K CL = Output (See Figure 6) 50 pF 50 pF 50 pF 50 pF Typ. 200 60 200 20 Max. 500 120 525 60 ns ns ns ns Unit
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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
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Figure 4 : Driver Voltage Waveforms
Figure 5 : Receiver Test Circuit for IOS
Figure 6 : Receiver Test Circuit for VT, VOH, VOL
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Figure 7 : Receiver Test Circuit
Figure 8 : Receiver Voltage Waveforms
NOTE A: The pulse generator has the following characteristics: tW = 25s, PRR = 20KHz, ZO = 50 , tr = tf < 50ns NOTE B: CL includes probe and jig capacitance.
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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
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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).
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ST75285
TSSOP38 MECHANICAL DATA
mm. DIM. MIN. A A1 A2 b c D E E1 e K L 0 0.50 0.6 0.05 0.8 0.17 0.09 9.6 6.2 4.3 9.7 6.4 4.4 0.5 8 0.75 0 0.020 0.023 1 TYP MAX. 1.2 0.15 1.05 0.27 0.20 9.8 6.6 4.5 0.002 0.031 0.0067 0.0035 0.378 0.244 0.169 0.381 0.252 0.173 0.0197 8 0.030 0.039 MIN. TYP. MAX. 0.047 0.006 0.041 0.011 0.0079 0.385 0.260 0.177 inch
A
A2 A1 b e K c L E
D
E1
PIN 1 IDENTIFICATION
1
0117861/B
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Tape & Reel TSSOP38 MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.8 10.1 1.7 3.9 11.9 12.8 20.2 60 22.4 7 10.3 1.9 4.1 12.1 0.268 0.398 0.067 0.153 0.468 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.276 0.406 0.075 0.161 0.476 MIN. TYP. MAX. 12.992 0.519 inch
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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. (c) The ST logo is a registered trademark of STMicroelectronics (c) 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. (c) http://www.st.com
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