LTC1482 - Low Power RS485 Transceiver with Carrier Detect and Receiver Fail-Safe
Features
- No Damage or Latchup to ±15kV (Human Body
Model), IEC1000-4-2 Level 4 (±8kV) Contact and
Level 3 (±8kV) - Active Low Carrier Detect Output
- Guaranteed High Receiver Output State for
Floating, Shorted or Terminated Inputs with
No Signal Present - Drives Low Cost Residential Telephone Wires
- Low Power: ICC = 700µA Max with Driver Disabled
- ICC = 900µA Max in Driver Mode Without Load
- 20µA Max Quiescent Current in Shutdown Mode
- Single 5V Supply
- –7V to 12V Common Mode Range Permits ±7V
Ground Difference Between Devices on the Data Line - Maximum Data Rate of 4Mbps
- Power Up/Down Glitch-Free Driver Outputs
- Up to 32 Transceivers on the Bus
- Available in 8-Lead MSOP, PDIP and SO Packages
Typical Application
Description
The LTC®1482 is a low power RS485 compatible transceiver that offers an active low carrier detect output. The open-drain carrier detect pin allows several transceivers to share the same carrier detect line and can be used to detect the insertion or removal of a driven RS485/RS422 cable. Enhanced ESD protection allows the LTC1482 to withstand ±15kV (human body model), IEC-1000-4-2 level 4 (±8kV) contact and level 3 (±8kV) air discharge ESD without latchup or damage. The LTC1482 receiver stays alive at all times except in shutdown. The supply current is a maximum of 700µA and 900µA when the driver is disabled and enabled respectively. In shutdown, the quiescent current of the LTC1482 drops to a maximum of 20µA. When the driver is disabled or the LTC1482 is in shutdown, the driver outputs are three-stated and remain in a high impedance state over the RS485 common mode range. Excessive power dissipation caused by bus contention or faults is prevented by a thermal shutdown circuit, which forces the driver outputs into a high impedance state. The LTC1482 is fully specified over the commercial and industrial temperature ranges and is available in 8-lead MSOP, PDIP and SO packages.Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC1482CMS8#PBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LTC1482CMS8#TRPBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LTC1482CN8#PBF | N-8 | N | C | 05-08-1510 (N8) | Yes |
| LTC1482CS8#PBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LTC1482CS8#TRPBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LTC1482IN8#PBF | N-8 | N | I | 05-08-1510 (N8) | Yes |
| LTC1482IS8#PBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LTC1482IS8#TRPBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC1482CMS8#PBF | MS-8 | C | $3.25 | $2.30 | Yes | |
| LTC1482CMS8#TRPBF | MS-8 | C | $2.36 | Yes | ||
| LTC1482CN8#PBF | N-8 | C | $2.65 | $1.95 | Yes | |
| LTC1482CS8#PBF | SO-8 | C | $2.75 | $2.00 | Yes | |
| LTC1482CS8#TRPBF | SO-8 | C | $2.06 | Yes | ||
| LTC1482IN8#PBF | N-8 | I | $3.50 | $2.55 | Yes | |
| LTC1482IS8#PBF | SO-8 | I | $3.65 | $2.70 | Yes | |
| LTC1482IS8#TRPBF | SO-8 | I | $2.76 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.Click here to view our complete list of demo boards
Applications
- Battery-Powered RS485/RS422 Applications
- Low Power RS485/RS422 Transceiver
- Level Translator
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Design Tools
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Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
