IDT74FCT138

• IDT54/74FCT138 equivalent to FAST^TM speed
• IDT54/74FCT138A 35% faster than FAST
• IDT54/74FCT138C 40% faster than FAST
• Equivalent to FAST speeds output drive over full temperature and voltage supply extremes
• IOL = 48mA (commercial) and 32mA (military)
• CMOS power levels (1mW typ. static)
• TTL input and output level compatible
• CMOS output level compatible
• Substantially lower input current levels than FAST (5A max.)
• JEDEC standard pinout for DIP and LCC
• Product available in Radiation Tolerant and Radiation Enhanced versions
• Military product compliant to MIL-STD-883, Class B
• Standard Military Drawing # 5962-87654 is listed on this function. Refer to section 2.

The IDT54/74FCT138/A/C are 1-of-8 decoders built using an advanced dual metal CMOS technology. The IDT54/74FCT138/A/C accept three binary weighted inputs (A₀, A₁,A₂) and, when enabled, provide eight mutually exclusive active LOW outputs (O₀ - O₇). The IDT54/74FCT138/A/C feature three enable inputs, two active LOW (E₁, E₂) and one active HIGH (E₃). All outputs will be HIGH unless E₁ and E₂ are LOW and E₃ is HIGH. This multiple enable function allows easy parallel expansion of the device to a 1-of-32 (5 lines to 32 lines) decoder with just four IDT54/74FCT138/A/C devices and one inverter.