Product Summary
The ST75185CDR is a multiple RS-232 driver and receiver. The device 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 ST75185CDR provides a rugged low-cost solution for this function at the expense of quiescent power and external passive components relative to the ST75185CDR. The ST75185CDR complies with the requirements of the EIA/TIA 232-E and ITU (formally CCITT) v.28 standards.
Parametrics
ST75185CDR absolute maximum ratings: (1)Supply voltage, VDD: 15 V; (2)Supply voltage, VSS: -15 V; (3)Supply voltage, VCC: 10 V; (4)Input voltage range (Driver), VI: -15 to 7 V; (5)Input voltage range (Receiver), VI: -30 to 30 V; (6)Output voltage range (Driver), VO: -15 to 15 V; (7)Receiver low level output current, IO: 20 mA; (8)Continuous total power dissipation, PD: See dissipation rating table; (9)Operating free-air temperature range, TA: 0 to 70℃; (10)Storage temperature range, TSTG: -65 to + 150℃; (11)Lead temperature 1.6 mm. from case for 10 sec., TL: 260℃.
Features
ST75185CDR features: (1)Meets and exceeds the requirements of EIA/TIA-232-E and ITUV.28 standard; (2)Single chip with easy interface between UART and serial port connector of IBM PC/ATTM and compatibles; (3)Designed to support data rates up to 120 kbps; (4)Pinout compatible with ST75185CDR.
Diagrams

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![]() Buffers & Line Drivers 3 Driver/5 Receivers |
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![]() RS-232 Interface IC 3 Driver/5 Receivers |
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![]() Buffers & Line Drivers 3 Driver/5 Receivers |
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(China (Mainland))










