Overview
The THVD1552DR is a part of the THVD15xx family of RS-485/RS-422 transceivers produced by Texas Instruments. These devices are designed to operate in rugged industrial environments and are characterized by their robustness against high levels of electrical fast transients (EFT) and electrostatic discharge (ESD) events. The THVD1552DR operates from a single 5-V supply and features an extended common-mode voltage range, making it suitable for multi-point applications over long cable runs. It is available in a SOIC (14) package and is specified over an ambient free-air temperature range from –40°C to 125°C.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Driver Differential Output Voltage Magnitude | RL = 54 Ω | 1.5 | 2.7 | V | |
| Propagation Delay | 5 | 10 | 16 | ns | |
| Pulse Skew | 3.5 | ns | |||
| Enable Time (DE = 0 V) | 10 | 22 | ns | ||
| Disable Time (RE = VCC) | 2 | 4 | μs | ||
| Supply Current (ICC) | VCC = 5.5 V, TA = 125 °C, 50% duty cycle square wave at signaling rate | 350 | mW | ||
| Operating Temperature Range | –40°C | 125°C | °C | ||
| Package Type | SOIC (14) |
Key Features
- Internal ESD protection circuits against electrostatic discharges (ESD) up to ±18 kV and electrical fast transients (EFT) up to ±4 kV according to IEC standards.
- Extended common-mode voltage range, suitable for multi-point applications over long cable runs.
- Single 5-V supply operation.
- Internal biasing of the receiver input thresholds with large input-threshold hysteresis, ensuring failsafe-high output under bus-idle, bus-short, or open-circuit conditions.
- Available in small VSSOP and SOIC packages for space-constrained applications.
- Specified over an ambient free-air temperature range from –40°C to 125°C.
Applications
- HVAC Systems
- Video Surveillance
- Process Analytics
- Telecom Infrastructure
Q & A
- What is the operating voltage of the THVD1552DR?
The THVD1552DR operates from a single 5-V supply.
- What is the temperature range for the THVD1552DR?
The device is specified over an ambient free-air temperature range from –40°C to 125°C.
- What kind of ESD protection does the THVD1552DR offer?
The device has internal ESD protection circuits against electrostatic discharges (ESD) up to ±18 kV.
- What is the maximum data rate for the THVD1552DR?
The THVD1552DR supports data rates up to 50 Mbps.
- What are the common applications for the THVD1552DR?
Common applications include HVAC systems, video surveillance, process analytics, and telecom infrastructure.
- What package types are available for the THVD1552DR?
The THVD1552DR is available in a SOIC (14) package.
- How does the THVD1552DR handle bus-idle or bus-short conditions?
The device features internal biasing of the receiver input thresholds, ensuring failsafe-high output under bus-idle, bus-short, or open-circuit conditions.
- What is the propagation delay for the THVD1552DR?
The propagation delay is between 5 ns and 16 ns.
- How does the driver enable pin (DE) function on the THVD1552DR?
When DE is logic high, the differential outputs follow the logic states at the data input D. When DE is low, both outputs turn high-impedance.
- What is the power dissipation for the THVD1552DR?
The power dissipation is approximately 350 mW under specified conditions.
