LTC1518 - High Speed, Precision Delay RS485 Quad Line Receivers
Features
- Precision Propagation Delay: 18.5ns ±3.5ns Over 0°C to 70°C Temperature Range
- Data Rate: 52Mbps
- Low tPLH/tPHL Skew: 500ps Typ
- Low Channel-to-Channel Skew: 500ps Typ
- -7V to 12V RS485 Input Common Mode Range
- Input Resistance >/=22k, Even When Unpowered
- Guaranteed Fail-Safe Operation over the Entire Common Mode Range
- Hot Swap™ Capable
- High Common Mode Rejection to 26MHz
- Short-Circuit Protection: 10mA Typ Output Current for an Indefinite Short
- Three-State Output Capability
- Will Not Oscillate with Slow Moving Input Signals
- Single 5V Supply
- Pin Compatible with LTC488, LTC489
Typical Application
Description
The LTC®1518/LTC1519 are high speed, precision delay differential quad bus/line receivers that can operate at data rates as high as 52Mbps. They are pin compatible with the LTC488/LTC489 RS485 line receivers and operate over the entire –7V to 12V common mode range. A unique architecture provides very stable propagation delays and low skew over wide input common mode, input overdrive and ambient temperature ranges. Propagation delay is 18.5ns ±3.5ns over the commercial temperature range. Typical tPLH/tPHL and channel-to-channel skew is 500ps.
Each receiver translates differential input levels (|VID| >= 300mV) into valid CMOS and TTL output levels. Its high input resistance (>=22k) allows many receivers to be connected to the same driver. The receiver outputs go into a high impedance state when disabled. The receivers have a fail-safe feature that guarantees a high output state when the inputs are shorted or left floating. Other protection features include thermal shutdown and a controlled maximum short-circuit current (50mA Max). Input resistance remains >=22k when the device is unpowered or disabled, thus allowing hot swapping without loading the data lines.
The LTC1518/LTC1519 operate from a single 5V supply and draw 12mA of supply current.
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 |
|---|---|---|---|---|---|
| LTC1518CS#PBF | SO-16 | S | C | 05-08-1610 (S16) | Yes |
| LTC1518CS#TRPBF | SO-16 | S | C | 05-08-1610 (S16) | Yes |
| LTC1518IS#PBF | SO-16 | S | I | 05-08-1610 (S16) | Yes |
| LTC1518IS#TRPBF | SO-16 | S | I | 05-08-1610 (S16) | 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 | |
|---|---|---|---|---|---|---|
| LTC1518CS#PBF | SO-16 | C | $6.25 | $5.35 | Yes | |
| LTC1518CS#TRPBF | SO-16 | C | $5.41 | Yes | ||
| LTC1518IS#PBF | SO-16 | I | $7.75 | $5.65 | Yes | |
| LTC1518IS#TRPBF | SO-16 | I | $5.71 | 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
- High Speed RS485/RS422 Receivers
- STS-1/OC-1 Data Receivers
- PECL Line Receivers
- Level Translators
- Fast-20/Fast-40 SCSI Receiver
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Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
- LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
- LTpowerCAD - A complete power supply selection, synthesis and design tool
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
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.
