LTC2859
PRODUCTION20Mbps RS485 Transceiver with Integrated Switchable Termination
- Part Models
- 6
- 1ku List Price
- Starting From $1.89
Overview
- Integrated, Logic-Selectable 120Ω Termination Resistor
- 20Mbps Max Data Rate
- No Damage or Latch-up to ESD: ±15kV HBM
- High Input Impedance Supports 256 Nodes
- 250kbps Low-EMI Mode
- Guaranteed Fail-safe Receiver Operation Over the Entire Common Mode Range
- Current Limited Drivers and Thermal Shutdown
- Delayed Micropower Shutdown (5μA Max)
- Power Up/Down Glitch-Free Driver Outputs
- Low Operating Current (900μA Max in Receive Mode)
- Meets All TIA/EIA-485-A Specifications
- Available in 10-Pin 3mm × 3mm DFN, 12-Pin 4mm × 3mm DFN and 16-Pin SSOP Packages
The LTC2859 and LTC2861 are low power, 20Mbps RS485/422 transceivers operating on 5V supplies. The receiver includes a logic-selectable 120Ω termination, one-eighth unit load supporting up to 256 nodes per bus, and a fail-safe feature that guarantees a high output state under conditions of floating or shorted inputs.
The driver features a logic-selectable low-EMI 250kbps operating mode, and maintains a high output impedance over the entire common mode range when disabled or when the supply is removed. Excessive power dissipation caused by bus contention or a fault is prevented by current limiting all outputs and by a thermal shutdown.
Enhanced ESD protection allows the LTC2859 and LTC2861 to withstand ±15kV (human body model) on the transceiver interface pins without latch-up or damage.
Applications
- Low Power RS485/RS422 Transceiver
- Level Translator
- Backplane Transceiver
Documentation
Data Sheet 1
Reliability Data 1
Technical Articles 1
Video 1
Product Selector Card 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC2859CDD#PBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC2859CDD#TRPBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC2859HDD#PBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC2859HDD#TRPBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC2859IDD#PBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LTC2859IDD#TRPBF | 10-Lead DFN (3mm x 3mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LTC2859CDD#PBF | PRODUCTION | |
| LTC2859CDD#TRPBF | PRODUCTION | |
|
Apr 9, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LTC2859HDD#PBF | PRODUCTION | |
| LTC2859HDD#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Interface Transceivers 1 | ||
| LTM2881 | PRODUCTION | Complete Isolated RS485/RS422 μModule Transceiver + Power |