Overview
The ST75185C, produced by STMicroelectronics, is a multiple RS-232 driver and receiver integrated circuit. It is designed to meet and exceed the requirements of the EIA/TIA-232-E and ITU V.28 standards. This single chip provides an easy interface between the UART and the serial port connector of IBM PC/AT™ and compatible systems. The ST75185C contains three drivers and five receivers, with a pinout compatible with the DB9S connector design, reducing part count and board space. It supports data rates up to 120 kbps and operates over a temperature range of 0°C to 70°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VDD) | 7.5 to 15 | V |
| Supply Voltage (VSS) | -7.5 to -15 | V |
| Supply Voltage (VCC) | 4.5 to 5.5 | V |
| Operating Temperature Range | 0 to 70 | °C |
| Data Rate | Up to 120 kbps | |
| Driver Output Voltage (VOH) | 6 to 7.5 | V |
| Driver Output Voltage (VOL) | -7.5 to -6 | V |
| Receiver Input Voltage Range | -30 to 30 | V |
| Package Types | SO-20, TSSOP20 |
Key Features
- Meets and exceeds EIA/TIA-232-E and ITU V.28 standards.
- Contains three drivers and five receivers.
- Pinout compatible with DB9S connector design.
- Supports data rates up to 120 kbps.
- Operates over a temperature range of 0°C to 70°C.
- Bipolar circuits provide a rugged, low-cost solution.
- Includes protection diodes for power supply fault conditions.
Applications
The ST75185C is suitable for various serial communication applications, including:
- IBM PC/AT™ and compatible systems.
- Industrial control systems.
- Point-of-sale terminals.
- Medical devices requiring serial communication.
- Any system requiring RS-232 serial interface.
Q & A
- What are the key standards that the ST75185C complies with?
The ST75185C complies with the EIA/TIA-232-E and ITU V.28 standards.
- How many drivers and receivers does the ST75185C contain?
The ST75185C contains three drivers and five receivers.
- What is the maximum data rate supported by the ST75185C?
The ST75185C supports data rates up to 120 kbps.
- What is the operating temperature range of the ST75185C?
The operating temperature range is 0°C to 70°C.
- What types of packages are available for the ST75185C?
The ST75185C is available in SO-20 and TSSOP20 packages.
- How does the pinout of the ST75185C help in system design?
The pinout is compatible with the DB9S connector design, reducing part count and board space.
- What kind of protection does the ST75185C have against power supply faults?
The ST75185C includes protection diodes for power supply fault conditions.
- What are some typical applications of the ST75185C?
Typical applications include IBM PC/AT™ and compatible systems, industrial control systems, point-of-sale terminals, and medical devices.
- What is the supply voltage range for the ST75185C?
The supply voltage ranges are 7.5 to 15 V for VDD, -7.5 to -15 V for VSS, and 4.5 to 5.5 V for VCC.
- How much current does the ST75185C typically consume from VCC?
The ST75185C typically consumes 30 mA from VCC when all inputs are at 5 V.
