Description
The CDP1822C/3 is a 256 word by 4-bit random access memory designed for use in memory systems where high speed, low operating current, and simplicity in use are desirable. The CDP1822 features high speed and excellent noise immunity. It has separate data inputs and outputs and utilizes a single power supply of 4V to 6.5V.

FEATUREs
• For Applications in Aerospace, Military, and Critical Industrial Equipment
• Interfaces Directly with CDP1802 Microprocessor
• Very Low Operating Current
    - At VDD = 5V and Cycle Time = 1µs . . . . . . 4mA (Typ)
• Static CMOS Silicon-On-Sapphire Circuitry
    - CD4000 Series Compatible
• Industry Standard Pinout
• Two Chip Select Inputs - Simple Memory Expansion
• Memory Retention for Standby. . . . . . . . . . . . . 2V (Min) Battery Voltage
• Single Power Supply Operation . . . . . . . . . . 4V to 6.5V
• High Noise Immunity 30% of VDD. . . . . . . . . 4V to 6.5V
• Output Disable for Common I/O Systems
• Three-State Data Output for Bus Oriented Systems
• Separate Data Inputs and Outputs
• Latch-Up-Free Transient Radiation Tolerance