ISO508

® ISO 508 ISO508 ISO 508 For most current data sheet and other product information, visit www.burr-brown.com Uni-Directional ISOLATED DIGITAL COUPLERS FEATURES q LOW POWER CONSUMPTION: < 12mW per Channel Typ. q 1500Vrms ISOLATION: 100% Tested by Partial Discharge q ASYNCHRONOUS OR SYNCHRONOUS OPERATION q DOUBLE BUFFERED DESIGN FOR EASY INTEGRATION INTO BUS-BASED SYSTEMS q TRI-STATE OUTPUTS q 24-PIN PDIP OR GULL WING PACKAGES q 2MWORDS/SEC TRANSFER RATE q 1µSEC TRANSIENT RECOVERY DESCRIPTION ISO508 is an 8-channel, isolated, digital coupler based on the Burr-Brown capacitive barrier technology. The ISO508 has additional circuitry to ensure DC accuracy and overcome the edge-sensitive nature of normal capacitive devices even on power-up conditions. The novel circuitry involved will restore the correct output after a transient interruption should that be necessary. The ISO508 is designed with input and output buffers for ease of integration into a µP bus system. The output buffer has tri-state capability, and by the use of OE, the output data bus lines can be made to go high impedance. This feature of the ISO508, which allows multiple access to a data bus, requires extra circuitry when using an alternative solution. ISO508 will transfer an 8-bit word at rates up to 2Mwords/s without the skew problems associated in implementing this function with optocouplers. The ISO508 is available in 24-pin PDIP or 24-pin Gull Wing packages. Both are specified for operation from –40° C ...