Product Summary

The ST75185C 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 ST75185C provides a rugged low-cost solution for this function at the expense of quiescent power and external passive components relative to the ST75185C. The ST75185C complies with the requirements of the EIA/TIA 232-E and ITU (formally CCITT) v.28 standards.

Parametrics

ST75185C 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

ST75185C 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 ST75C185.

Diagrams

ST75185C circuit diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
ST75185CD
ST75185CD

STMicroelectronics

RS-232 Interface IC 3 Driver/5 Receivers

Data Sheet

Negotiable 
ST75185CDR
ST75185CDR

STMicroelectronics

Buffers & Line Drivers 3 Driver/5 Receivers

Data Sheet

0-1: $0.27
1-10: $0.25
10-100: $0.21
100-250: $0.19
ST75185CPR
ST75185CPR

STMicroelectronics

RS-232 Interface IC 3 Driver/5 Receivers

Data Sheet

Negotiable 
ST75185CTR
ST75185CTR

STMicroelectronics

Buffers & Line Drivers Drivers - Receivers

Data Sheet

0-1: $0.63
1-10: $0.59
10-100: $0.49
100-250: $0.44