概要

The ISL33354E, ISL33357E are two port interface ICs where port 1 is configured as a dual (2 Tx, 2 Rx) RS-232 transceiver, and port 2 is a single RS-485/422 transceiver. An on-board charge pump generates RS-232 compliant ±5V Tx output levels from a single VCC supply as low as 4. 5V. The transceivers are RS-232 compliant, with the Rx inputs handling up to ±25V. The port 2 transceiver supports both the RS-485 and RS-422 differential communication standards. The receiver features full fail-safe operation, so the Rx output remains in a high state if the inputs are open or shorted together. The transmitter supports two data rates, one of which is slew rate limited for problem free communication at low data rates. The active low Rx enable pin (RE485) allows Tx/Rx direction control, via a single signal, simply by connecting the corresponding DE485 and RE485 pins together. The ISL33354E and ISL33357E also include a shutdown function, which disables the Tx and Rx outputs, disables the charge pumps and places the IC in a low current (55µA) mode. The ISL33357E is a QFN packaged device for space constrained applications.

ISL33354E_ISL33357E Functional Diagram
ISL33354E_ISL33357E Functional Diagram
  • ±15kV (HBM) ESD protected bus pins (RS-232 or RS-485)
  • Operates from a single 5V supply
  • Two independent ports: port 1 set for RS-232 (2 transceivers) and port 2 for RS-485/RS-422 (1 transceiver)
  • True flow-through pinouts (Rx inputs and Tx outputs all on the same side) simplify board layouts
  • Pb-free (RoHS compliant)
  • Full fail-safe (open/short) RS-485/422 port 2 Rx
  • User selectable RS-485 data rates
  • Fast speed: up to 20Mbps
  • Slew rate limited: up to 115kbps
  • Fast RS-232 data rate: 460kbps (Minimum)
  • Small charge pump capacitors: 4 x 0.1µF
  • Low current shutdown mode: 55µA
  • QFN package saves board space (ISL33357E only)

ドキュメント

設計・開発

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製品選択

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    Pkg. Type
    Carrier Type
    MOQ
    ご購入 / サンプル
    型名
    ISL33357EIRZ
    circle廃止品
    memory
    spa
    view_in_ar
    		QFN Tube 500
    ISL33357EIRZ-T
    circle廃止品
    memory
    spa
    view_in_ar
    		QFN Reel 4000
    ISL33357EIRZ-T7A
    circle廃止品
    memory
    spa
    view_in_ar
    		QFN Reel 250
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