ST75285CTR STMicroelectronics

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 TM CONNECTOR OF IBM PC/AT 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 peripheral at signalling rates up to 20k-bits/s. The connector design in order to decrease the part switching speeds of the ST75285 are fast enough count, reduce the board space required and allow to support rates up to 120K-bits/s with lower easy interconnection of the UART and serial port capacitive loads (shorter cables). Interoperability TM connector of IBM PC/AT and compatibles. The at the higher signalling rates cannot be assured bipolar circuits and processing of the ST75285 unless the designer has design control of the provides a rugged low-cost solution for this cable and the interface circuits at the both ends. function at the expense of quiescent power and For interoperability at signalling rates to 120 external passive components relative to the K-bits/s, use of EIA/ITA-423-B (ITU v.10) and EIA/ ST75C185. ITA-422-B (ITU v.11) standards are The ST75285 complies with the requirements of recommended. It allows space saving in the EIA/TIA 232-E and ITU (formally CCITT) v.28 applications where two ST75185 are needed. standards. These standards are for data interchange between a host computer and ORDERING CODES Temperature Type Package Comments Range ST75285CTR 0 to 70 C TSSOP38 (Tape & Reel) 2500 parts per reel December 2002 1/13 Obsolete Product(s) - Obsolete Product(s) ST75285 PIN DESCRIPTION PlN N SYMBOL NAME AND FUNCTION 1V Supply Voltage (+12V) DD 2 RIN1 First Receiver Input 3 RIN2 Second Receiver Input 4 RIN3 Third Receiver Input 5 TOUT1 First Driver Output 6 TOUT2 Second Driver Output 7 RIN4 Fourth Receiver Input 8 TOUT3 Third Driver Output 9 RIN5 Fifth Receiver Input V Supply Voltage (-12V) 10 CC 11 RIN6 Sixth Receiver Input 12 TOUT4 Fourth Driver Output 13 RIN7 Seventh Receiver Input 14 TOUT5 Fifth Driver Output 15 TOUT6 Sixth Driver Output 16 RIN8 Eighth Receiver Input 17 RIN9 Nineth Receiver Input 18 RIN10 Tenth Receiver Input V Supply Voltage (-12V) 19 DD 20 V Supply Voltage (+5V) SS 21 ROUT10 Tenth Receiver Ouput 22 ROUT9 Nineth Receiver Ouput 23 ROUT8 Eighth Receiver Ouput 24 TIN6 Sixth Driver Input 25 TIN5 Fifth Driver Input 26 ROUT7 Seventh Receiver Ouput 27 TIN4 Fourth Driver Input 28 ROUT6 Sixth Receiver Output 29 GND Ground 30 ROUT5 Fifth Receiver Output 31 TIN3 Third Driver Input 32 ROUT4 Fourth Receiver Output 33 TIN2 Second Driver Input 34 TIN1 First Driver Input 35 ROUT3 Third Receiver Ouput 36 ROUT2 Second Receiver Ouput 37 ROUT1 First Receiver Ouput 38 V Supply Voltage (+5V) SS 2/13 Obsolete Product(s) - Obsolete Product(s)