Overview
The SN75176B differential bus transceiver, produced by Texas Instruments, is a monolithic integrated circuit designed for bidirectional data communication on multipoint bus transmission lines. It is specifically tailored for balanced transmission lines and complies with ANSI standards TIA/EIA-422-B and TIA/EIA-485-A, as well as ITU Recommendations V.11 and X.27. This device combines a 3-state differential line driver and a differential input line receiver, both operating from a single 5-V power supply. The driver and receiver have active-high and active-low enables, respectively, which can be connected externally to function as a direction control. This configuration allows for minimal loading on the bus when the driver is disabled or VCC = 0, making it suitable for party-line applications.
Key Specifications
| Specification | Value |
|---|---|
| Package Type | PDIP (8 pins), SOIC (8 pins), SOP (8 pins) |
| Operating Temperature Range | 0°C to 70°C |
| Power Supply | Single 5-V supply |
| Driver Output Capability | ±60 mA Max |
| Receiver Input Impedance | 12 kΩ Min |
| Receiver Input Sensitivity | ±200 mV |
| Receiver Input Hysteresis | 50 mV Typ |
| Thermal Shutdown Protection | Junction temperature of approximately 150°C |
| Driver Current Limiting | Positive and negative current limiting |
Key Features
- Bidirectional transceivers
- Meets or exceeds the requirements of ANSI standards TIA/EIA-422-B and TIA/EIA-485-A and ITU Recommendations V.11 and X.27
- Designed for multipoint transmission on long bus lines in noisy environments
- 3-State driver and receiver outputs
- Individual driver and receiver enables
- Wide positive and negative input/output bus voltage ranges
- Thermal shutdown protection and driver positive and negative current limiting
- Operates from a single 5-V supply
- Low power requirements
Applications
- Chemical and gas sensors
- Digital signage
- HMI (human machine interfaces)
- Motor controls: AC induction, brushed and brush-less DC, low- and high-voltage, stepper motors, and permanent magnets
- TETRA Base stations
- Telecom towers: remote electrical tilt units (RET) and tower mounted amplifiers (TMA)
- Weigh scales
- Wireless repeaters
Q & A
- What is the SN75176B used for?
The SN75176B is used for bidirectional data communication on multipoint bus transmission lines, particularly in balanced transmission line applications.
- What standards does the SN75176B comply with?
The SN75176B complies with ANSI standards TIA/EIA-422-B and TIA/EIA-485-A, as well as ITU Recommendations V.11 and X.27.
- What is the power supply requirement for the SN75176B?
The SN75176B operates from a single 5-V power supply.
- What is the maximum driver output capability of the SN75176B?
The maximum driver output capability is ±60 mA.
- What is the minimum receiver input impedance of the SN75176B?
The minimum receiver input impedance is 12 kΩ.
- What is the receiver input sensitivity of the SN75176B?
The receiver input sensitivity is ±200 mV.
- Does the SN75176B have thermal shutdown protection?
Yes, the SN75176B has thermal shutdown protection that occurs at a junction temperature of approximately 150°C.
- What are the typical applications of the SN75176B?
Typical applications include chemical and gas sensors, digital signage, HMI, motor controls, TETRA Base stations, telecom towers, weigh scales, and wireless repeaters.
- Can the driver and receiver enables be controlled externally?
Yes, the driver and receiver enables can be connected together externally to function as a direction control.
- What is the operating temperature range of the SN75176B?
The operating temperature range is 0°C to 70°C.
- Does the SN75176B have current limiting features?
Yes, the SN75176B features positive and negative current limiting for the driver.
