89C1632 16 Megabit (512K x 32-Bit) MCM SRAM

Discontinued Product. Please contact the factory for the latest replacement.


Part Number(s):89C1632

DDC’s 89C1632 high-performance 16 Megabit Multi-Chip Module (MCM) Static Random Access Memory features a greater than 100 krad (Si) total dose tolerance, depending upon space mission. The four 4-Megabit SRAM die and bypass capacitors are incorporated into a high-reliable hermetic quad flat-pack ceramic package. With high-performance silicon-gate CMOS technology, the 89C1632 reduces power consumption and eliminates the need for external clocks or timing strobes. It is equipped with output enable (OE) and four byte enable (CS1 - CS4) inputs to allow greater system flexibility. When OE input is high, the output is forced to high impedance.

DDC’s patented RAD-PAK® packaging technology incorporates radiation shielding in the microcircuit package. In a GEO orbit, RAD-PAK provides true greater than 100 krad (Si) total radiation dose tolerance, dependent upon space mission. It eliminates the need for box shielding while providing the required radiation shielding for a lifetime in orbit or a space mission. This product is available with screening up to DDC’s self-defined Class K.


  • Four 512k x 8 SRAM architecture
  • RAD-PAK® technology hardens against natural space radiation technology
  • Total dose hardness:
    • >100 krad (Si), depending upon space mission
  • Excellent Single Event Effects:
    • SEL > 101MeV-cm2/mg
    • SEU threshold = 3 MeV-cm2/mg
    • SEU saturated cross section: 6E-9 cm2/bit
  • Package: 68-pin quad flat package
  • Fast access time: 20, 25 and 30 ns
  • Completely static memory - no clock or timing strobe required
  • Internal bypass capacitor
  • High-speed silicon-gate CMOS technology
  • 5V or 3V ± 10% power supply
  • Equal address and chip enable access times
  • Three-state outputs
  • All inputs and outputs are TTL compatible




89C1632 16 Megabit (512K x 32-Bit) MCM SRAM Data Sheet

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