Overview
The ST26C31BDR is a quad differential line driver designed by STMicroelectronics for digital data transmission over balanced lines. It meets all the requirements of the EIA standard RS-422 while retaining the low power characteristics of CMOS technology. This component accepts TTL or CMOS input levels and translates these to RS-422 output levels, making it suitable for a variety of applications requiring reliable and efficient data transmission.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 4.5 to 5.5 | V |
| Operating Temperature Range (TA) | -40 to +85 | °C |
| High Level Input Voltage (VIH) | 2 | V |
| Low Level Input Voltage (VIL) | 0.8 | V |
| High Level Output Voltage (VOH) | 2.5 to 3.4 | V |
| Low Level Output Voltage (VOL) | 0.3 to 0.5 | V |
| Differential Output Voltage (VT) | 2 to 3.1 | V |
| Propagation Delay (tPLH, tPHL) | 2 to 6 ns | ns |
| Output Skew | 0.5 ns | ns |
| Quiescent Supply Current (ICC) | 200 to 500 µA | µA |
| Package Types | DIP-16, SO-16, TSSOP16 |
Key Features
- TTL input compatible
- Typical propagation delay: 6 ns
- Typical output skew: 0.5 ns
- Meets the requirements of EIA standard RS-422
- Operation from single 5 V supply
- 3-state outputs for connection to system buses
- Low quiescent current
- Output will not load line when VCC = 0 V
- Available in surface mount packages (DIP-16, SO-16, TSSOP16)
- Protected against damage due to electrostatic discharge
Applications
The ST26C31BDR is suitable for various applications requiring reliable and efficient digital data transmission over balanced lines, such as:
- Industrial automation and control systems
- Telecommunication equipment
- Data communication networks
- Point-of-sale terminals and other commercial equipment
- Any system requiring RS-422 compliant data transmission
Q & A
- What is the primary function of the ST26C31BDR?
The ST26C31BDR is a quad differential line driver designed for digital data transmission over balanced lines, meeting the requirements of EIA standard RS-422.
- What are the input and output voltage levels compatible with the ST26C31BDR?
The component accepts TTL or CMOS input levels and translates these to RS-422 output levels.
- What is the typical propagation delay of the ST26C31BDR?
The typical propagation delay is 6 ns.
- What is the output skew of the ST26C31BDR?
The typical output skew is 0.5 ns.
- What are the package types available for the ST26C31BDR?
The component is available in DIP-16, SO-16, and TSSOP16 packages.
- What is the operating temperature range of the ST26C31BDR?
The operating temperature range is -40 to +85 °C.
- Is the ST26C31BDR protected against electrostatic discharge?
Yes, all outputs are protected against damage due to electrostatic discharge by diodes to VCC and ground.
- What is the quiescent supply current of the ST26C31BDR?
The quiescent supply current (ICC) is 200 to 500 µA.
- Can the ST26C31BDR operate with a single power supply?
Yes, it operates from a single 5 V supply.
- What happens to the output when VCC = 0 V?
The output will not load the line when VCC = 0 V.
