DESCRIPTION:
The IDT54/74FCT800 series is built using an advanced dual metal CMOS technology.
The IDT54/74FCT820 series bus interface registers are designed to eliminate the extra packages required to buffer existing registers and provide extra data width for wider address/data paths or buses carrying parity.
   
FEATURES:
• Equivalent to AMD’s Am29821-25 bipolar registers in
    pinout/function, speed and output drive over full
    temperature and voltage supply extremes
• IDT54/74FCT821A/823A/824A/825A equivalent to
    FAST™ speed
• IDT54/74FCT821B/823B/824B/825B 25% faster than
    FAST
• IDT54/74FCT821C/823C/824C/825C 40% faster than
    FAST
• Buffered common Clock Enable (EN) and asynchronous
    Clear input (CLR)
• IOL = 48mA (commercial) and 32mA (military)
• Clamp diodes on all inputs for ringing suppression
• CMOS power levels (1mW typ. static)
• TTL input and output compatibility
• CMOS output level compatible
• Substantially lower input current levels than AMD’s
    bipolar Am29800 series (5µA max.)
• Product available in Radiation Tolerant and Radiation
    Enhanced versions
• Military product compliant to MIL-STD-883, Class B