Interface & Connectivity

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

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

Title Type Date
PDF1.36 MB
Datasheet
PDF207 KB
Application Note
PDF352 KB
Application Note
PDF474 KB
Application Note
PDF366 KB
Application Note
PDF178 KB
Application Note
PDF513 KB
Application Note
PDF826 KB
Application Note
PDF443 KB
Application Note
PDF582 KB
Application Note
PDF440 KB
Application Note
PDF338 KB
Application Note
PDF365 KB
Application Note
PDF375 KB
Application Note
PDF559 KB
Application Note
PDF2.72 MB日本語
Brochure
PDF156 KB
Other
PDF253 KB
Other
PDF254 KB
Other
PDF208 KB
Price Increase Notice
PDF203 KB
Product Advisory
PDF106 KB
Product Advisory
PDF178 KB
Product Change Notice
PDF266 KB
Product Change Notice
PDF294 KB
Product Change Notice
PDF108 KB
Product Change Notice
PDF438 KB
Report
PDF188 KB
Technical Brief
PDF300 KB
Technical Brief
PDF920 KB 简体中文
White Paper
PDF246 KB 简体中文
White Paper

Design & Development

Models

Models

Title Type Date
IBS45 KB
Model - IBIS
IBS45 KB
Model - IBIS

Support