MAXIM DG528CWN+

Maxim’s DG528/DG529 are monolithic, 8-channel, CMOS multiplexers with on-board address and control latches that simplify design and reduce board space in microprocessor-based applications. The DG528 is a single-ended, 1-of-8 multiplexer, while the DG529 is a differential, 2-of-8 multiplexer. These devices can operate as multiplexers or demultiplexers. The DG528/DG529 have break-before-make switching to prevent momentary shorting of the input signals. Each device operates with dual supplies (±4.5V to ±20V) or a single supply (+5V to +30V). All logic inputs are TTL and CMOS compatible. The Maxim DG528/DG529 are pin and electrically compatible with the industry-standard DG528/DG529. The internal structures of the DG528/DG529 include translators for the A2/A1/A0/EN/WR/RS digital inputs, latches, and a decode section for channel selection (Truth Tables). The gate structures consist of parallel combinations of N and P MOSFETs. WRITE (WR) and RESET (RS) strobes are provided for interfacing with μP-bus lines, alleviating the need for the μP to provide constant address inputs to the mux to hold a particular channel. When the WR strobe is in the low state (less than 0.8V) and the RS strobe is in the high state (greater than 2.4V), the muxes are in the transparent mode—they act similarly to nonlatching devices, such as the DG508A/ DG509A or the HI508/HI509. When the WR goes high, the previous BCD address input is latched and held in that state indefinitely. To pull the mux out of this state, either WR must be taken low to the transition state, or RS must be taken low to turn off all channels. RS turns off all channels when it is low, which resets channel selection to the channel 1 mode. The DG528/DG529 work with both single and dual supplies and function over the +5V to +30V single-supply range.

• Low-Power, Monolithic CMOS Design
• On-Board Address Latches
• Break-Before-Make Input Switches
• TTL and CMOS Logic Compatible
• Microprocessor-Bus Compatible
• rDS(ON) < 400Ω
• Pin and Electrically Compatible with the Industry Standard DG528/DG529 and ADG528/ADG529

• Data-Acquisition Systems
• Automatic Test Equipment
• Communication Systems
• Microprocessor-Controlled Systems
• Audio-Signal Multiplexing