Overview
The ADM485JN, manufactured by Analog Devices Inc., is a single transmitter/receiver designed for RS-422 and RS-485 communication protocols. This component is part of the interface, bus line transceivers category and is housed in an 8-pin PDIP (Plastic Dual In-Line Package) package. It operates on a single 5 V power supply and is suitable for high-speed bidirectional data communication on multipoint bus transmission lines. The ADM485JN complies with EIA standards RS-485 and RS-422, making it a versatile choice for various industrial and commercial applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 8-DIP (0.300", 7.62mm) |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Half |
| Receiver Hysteresis | 70mV |
| Data Rate | 5Mbps |
| Voltage - Supply | 4.75 V ~ 5.25 V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Through Hole |
| Driver Propagation Delay | 10 ns typical |
| Receiver Propagation Delay | 15 ns typical |
Key Features
- Meets EIA RS-485 and RS-422 standards
- Single 5 V power supply
- High speed, low power BiCMOS technology
- Thermal shutdown protection and short-circuit protection
- High-Z outputs when powered off
- Fail-safe feature resulting in a logic high output state if inputs are unconnected
- ESD protection on all inputs and outputs
- High source and sink current capability on driver outputs
- Available in 8-lead PDIP, 8-lead SOIC, and 8-lead MSOP packages
Applications
- Low power RS-485 systems
- DTE/DCE interface
- Packet switching
- Local area networks (LANs)
- Data concentration
- Data multiplexers
- Integrated services digital network (ISDN)
Q & A
- What is the primary function of the ADM485JN?
The ADM485JN is a single transmitter/receiver designed for RS-422 and RS-485 communication protocols, facilitating high-speed bidirectional data communication on multipoint bus transmission lines.
- What is the operating voltage range of the ADM485JN?
The ADM485JN operates on a single 5 V power supply with a voltage range of 4.75 V to 5.25 V.
- What are the key protocols supported by the ADM485JN?
The ADM485JN supports both RS-422 and RS-485 protocols.
- What is the maximum data rate of the ADM485JN?
The ADM485JN has a maximum data rate of 5 Mbps.
- What type of protection does the ADM485JN offer?
The ADM485JN features thermal shutdown protection, short-circuit protection, and ESD protection on all inputs and outputs.
- What are the available package types for the ADM485JN?
The ADM485JN is available in 8-lead PDIP, 8-lead SOIC, and 8-lead MSOP packages.
- What is the operating temperature range of the ADM485JN?
The ADM485JN operates over a temperature range of -40°C to 85°C.
- How many transceivers can be connected simultaneously on a bus?
Up to 32 transceivers can be connected simultaneously on a bus, but only one driver should be enabled at any time.
- What is the fail-safe feature of the ADM485JN?
The receiver contains a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating).
- What technology is used in the fabrication of the ADM485JN?
The ADM485JN is fabricated using BiCMOS technology, combining low power CMOS with fast switching bipolar technology.
