Quad 8-Bit Multiplying CMOS D/A Converter with Memory - 8408

Maxwell Technologies’ 8408 is a monolithic quad 8-bit multiplying digital-to-analog CMOS converter. Each DAC has its own reference input, feedback resistor, and onboard data latches that feature read/write capability. The read-back function serves as memory for those systems requiring self-diagnostics.

A common 8-bit TTL/CMOS compatible input port is used to load data into any of the four DAC data-latches. Control lines DS1, DS2 and A/B determine which DAC will accept data. Data loading is similar to that of a RAMs write cycle. Data can be read back onto the same bus with control line R/W. The 8408 is a bus compatible with most 8-bit microprocessors, including the 6800, 8080, 8085, and Z80.

The 8408 operates on a single +5 volt supply and dissipates less than 20 mW. The 8408 is manufactured using highly stable, thin-film resistors on an advanced oxide-isolated, silicon-gate, CMOS process. The improved latch-up resistant design eliminates the need for external protective Schottky diodes .

Maxwell Technologies' patented RAD-PAK® packaging technology incorporates radiation shielding in the microcircuit package. It eliminates the need for box shielding while providing the required radiation shielding for a lifetime in orbit or space mission. In a GEO orbit, RAD-PAK® provides greater than 100 krad (Si) radiation dose tolerance. This product is available with screening up to Class S.


RAD-PAK® patented shielding against natural space radiation
Total dose hardness: Equal to 100 krad (Si), depending upon orbit and space mission
Package: 28 pin RAD-PAK® Flat Pack
Single Supply Operation (+5V)
Four 8 Bit DACs in one 28 Pin Package
D/As Matched to within 1%
TTL/CMOS Compatible
Four-Quadrant Multiplication