THVD1505 Texas instruments

THVD1505

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THVD1505

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Описание

The THVD1505 is a low-power RS-485 transceiver with automatic bus-polarity correction and transient protection. Upon hot plug-in, the device detects and corrects the bus polarity within the first 45 ms of bus idling. The bus pins are robust to electrostatic discharge (ESD) events, with high levels of protection to human-body model (HBM), IEC 61000-4-2 contact discharge and air-gap discharge specifications.The device combines a differential driver and a differential receiver, which operate together from a single 5-V power supply. The driver differential outputs and the receiver differential inputs are connected internally to form a bus port suitable for half-duplex (two-wire bus) communication. The device features a wide common-mode voltage range making the device suitable for multi-point applications over long cable runs. The THVD1505 is available in an SOIC-8 package, and is characterized for free-air temperatures from –40°C to 125°C.

Meets or exceeds the requirements of the TIA/EIA-485A standard and the State Grid Corporation of China (SGCC) Part 11 Serial Communication Protocol RS-485 standard
4.5-V to 5.5-V supply voltage
Half-duplex RS-422 / RS-485
Bus polarity correction within 45 ms
Works with or without fail-safe biasing resistors
Data rate: up to 1 Mbps
Bus I/O protection:
- ±16-kV HBM ESD
- ±8-kV IEC 61000-4-2 contact discharge
- ±8-kV IEC 61000-4-2 air-gap discharge
- ±2-kV IEC 61000-4-4 fast transient burst
Open, short, and idle bus fail-safe
Large receiver hysteresis
for noise rejection: 120 mV
Up to 256 nodes on a bus (1/8 unit load)
Extended ambient temperature
range: -40°C to 125°C
Low power consumption
- Standby supply current: < 1 µA
- Operational supply current: < 1.1 mA
Glitch-free power-up / down for hot plug-in capability

Number of receivers	1
Number of transmitters	1
Duplex	Half
Supply voltage (nom) (V)	5
Signaling rate (max) (MBits)	1
IEC 61000-4-2 contact (±V)	8000
Fault protection (V)	-18 to 18
Common-mode range (V)	-7 to 12
Number of nodes	256
Features	Auto polarity, IEC ESD protection
Isolated	No
Supply current (max) (µA)	1100
Rating	Catalog
Operating temperature range (°C)	-40 to 125