DG458

DG458, DG459 Vishay Siliconix Fault-Protected Single 8-Ch/Differential 4-Ch Analog Multiplexers DESCRIPTION The DG458 and DG459 are 8-channel single-ended and 4-channel differential analog multiplexers, respectively, incorporating fault protection. A series n-p-n MOSFET structure provides device and signal-source protection in the event of power loss or overvoltages. Under fault conditions the multiplexer input (or output) appears as an open circuit and only a few nanoamperes of leakage current will flow. This protects not only the multiplexer and the circuitry following it, but also protects the sensors or signal sources which drive the multiplexer. The DG458 and DG459 can withstand continuous overvoltage inputs up to ± 35 V. All digital inputs have TTL compatible logic thresholds. Break-before-make operation prevents channel-to-channel interference. The DG458 and DG459 are improved pin-compatible replacements for HI-508A/509A and MAX358/359 multiplexers. FEATURES Fault and Overvoltage Protection All Channels Off When Power Off Latchup-Proof Fast Switching - tA: 200 ns Break-Before-Make Switching Low On-Resistance: 180 W Low Power Consumption: 3 mW TTL and CMOS Compatible Inputs BENEFITS Improved Ruggedness Power Loss Protection Prevents Adjacent Channel Crosstalk Standard Logic Interface Superior Accuracy Fast Settling Time APPLICATIONS Data Acquisition Systems Industrial Process Control Systems Avionics Test Equipment High-Rel Control ...