±15kV ESD Protected, 3.3V, Full Fail-Safe, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers
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Overview
Description
The Renesas ISL317xE are ±15kV IEC61000 ESD protected, 3. 3V powered single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. These devices have very low bus currents (+125µA/-100µA), so they present a true “1/8 unit load” to the RS-485 bus. This allows up to 256 transceivers on the network without violating the RS-485 specification's 32 unit load maximum, and without using repeaters. For example, in a remote utility meter reading system, individual meter readings are routed to a concentrator using an RS-485 network, so the high allowed node count minimizes the number of repeaters required. Receiver (Rx) inputs feature a “Full Fail-Safe” design, which ensures a logic high Rx output if Rx inputs are floating, shorted, or terminated but undriven. Hot Plug circuitry ensures that the Tx and Rx outputs remain in a high impedance state while the power supply stabilizes. The ISL3170E through ISL3175E utilize slew rate limited drivers which reduce EMI, and minimize reflections from improperly terminated transmission lines, or unterminated stubs in multidrop and multipoint applications. Slew rate limited versions also include receiver input filtering to enhance noise immunity in the presence of slow input signals. The ISL3170E, ISL3171E, ISL3173E, ISL3174E, ISL3176E, and ISL3177E are configured for full duplex (separate Rx input and Tx output pins) applications. The half duplex versions multiplex the Rx inputs and Tx outputs to allow transceivers with output disable functions in 8 Ld packages.
Features
- IEC61000 ESD protection on RS-485 I/O pins ±15kV
- Class 3 ESD level on all other pins >7kV HBM
- Full fail-safe (open, short, terminated/floating) receivers
- Hot plug - Tx and Rx outputs remain three-state during power-up (only versions with output enable pins)
- True 1/8 unit load allows up to 256 devices on the bus
- Single 3.3V supply
- High data rates up to 20Mbps
- Low quiescent supply current 800µA (Max)
- Ultra low shutdown supply current 10nA
- -7V to +12V common-mode input/output voltage range
- Half and full duplex pinouts
- Three state Rx and Tx outputs available
- Current limiting and thermal shutdown for driver overload protection
- Tiny MSOP packages consume 50% less board space
- Pb-free (RoHS compliant)
Applications
Applications
- Automated utility meter reading systems
- High node count systems
- Field bus networks
- Security camera networks
- Building environmental control/lighting systems
- Industrial/process control networks
Documentation
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Datasheet
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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Application Note
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PDF443 KB
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Application Note
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PDF582 KB
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Application Note
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PDF440 KB
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Application Note
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PDF338 KB
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Application Note
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PDF365 KB
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Application Note
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PDF375 KB
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Application Note
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PDF559 KB
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Application Note
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Brochure
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PDF2.95 MB
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Brochure
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PDF156 KB
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Other
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PDF253 KB
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Other
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PDF254 KB
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Other
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PDF203 KB
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Product Advisory
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PDF106 KB
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Product Advisory
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PDF178 KB
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Product Change Notice
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PDF266 KB
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Product Change Notice
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PDF398 KB
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Product Change Notice
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PDF108 KB
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Product Change Notice
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PDF438 KB
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Report
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Technical Brief
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PDF188 KB
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Technical Brief
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White Paper
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White Paper
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Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Product Options
Processing table
| SOICN | Tube | 2000 | Get Samples, | |
| SOICN | Reel | 2500 | ||
| MSOP | Tube | 1960 | Get Samples, | |
| MSOP | Reel | 2500 |
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