Overview
The LTC2870IUFD#PBF is a robust pin-configurable multiprotocol transceiver produced by Analog Devices Inc. This component supports RS232, RS485, and RS422 protocols, making it versatile for various communication applications. It operates on a single supply voltage ranging from 3V to 5.5V, which simplifies the power supply requirements. The LTC2870IUFD#PBF features an integrated DC/DC boost converter, eliminating the need for multiple power supplies to drive RS232 levels. This transceiver is designed for reliability and efficiency, with features such as automatic termination selection and high ESD protection.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Supply Voltage (VCC) | Operating Range | 3 | 5.5 | V | |
| Logic Supply Voltage (VL) | Operating Range | 1.7 | VCC | V | |
| VCC Supply Current in Shutdown Mode | RXEN = VL, DXEN = TE485 = FEN = 0V | 60 | µA | ||
| VCC Supply Current in Transceiver Mode | Outputs Unloaded | 3.3 | mA | ||
| RS485 Data Rate | 20 | Mbps | |||
| RS232 Data Rate | 500 | kbps | |||
| ESD Protection | ±26kV (LTC2870) | ||||
| Package Type | 28-Lead (4mm × 5mm) Plastic QFN | ||||
| Temperature Range | –40 | 85 | °C |
Key Features
- Supports RS232, RS485, and RS422 protocols
- Single supply voltage operation from 3V to 5.5V
- Integrated DC/DC boost converter for RS232 levels
- Automatic selection of integrated RS485 (120Ω) and RS232 (5kΩ) termination resistors
- Half-/Full-Duplex RS485 switching
- High ESD protection: ±26kV (LTC2870)
- Logic loopback mode
- 1.7V to 5.5V logic interface
- Supports up to 256 RS485 nodes
- RS485 receiver failsafe eliminates UART lockup
Applications
- Industrial automation and control systems
- Automotive communication systems
- Building automation and control systems
- Point-of-sale terminals and kiosks
- Medical devices requiring reliable serial communication
- Embedded systems needing multiprotocol support
Q & A
- What protocols does the LTC2870IUFD#PBF support?
The LTC2870IUFD#PBF supports RS232, RS485, and RS422 protocols.
- What is the operating supply voltage range for the LTC2870IUFD#PBF?
The operating supply voltage range is from 3V to 5.5V.
- Does the LTC2870IUFD#PBF require multiple power supplies for RS232 levels?
No, it features an integrated DC/DC boost converter that eliminates the need for multiple power supplies.
- What is the maximum data rate for RS485 communication?
The maximum data rate for RS485 communication is 20 Mbps.
- What is the maximum data rate for RS232 communication?
The maximum data rate for RS232 communication is 500 kbps.
- What is the ESD protection level for the LTC2870IUFD#PBF?
The ESD protection level is ±26kV for the LTC2870.
- What package type is the LTC2870IUFD#PBF available in?
The LTC2870IUFD#PBF is available in a 28-Lead (4mm × 5mm) Plastic QFN package.
- What is the temperature range for the LTC2870IUFD#PBF?
The temperature range is from –40°C to 85°C.
- Does the LTC2870IUFD#PBF support half-duplex and full-duplex RS485 operation?
- How many RS485 nodes can the LTC2870IUFD#PBF support?
