When configured as NOR gate, it will reduce the boolean expression A + B + C + D + E + F + G + H + EXPAND, which is a 9-input NOR gate when EXPAND is used as a 9th input. When configured as AND-OR (AO) gate, it will reduce the boolean expression ABCD + EFGH + EXPAND. When configured as AND-OR-INVERT (AOI) gate, it will reduce the boolean expression ABCD + EFGH + EXPAND. 4048 = Single expandable 8-input 8-function with three-state output, 8 choices for gate type: 8 NOR / 8 OR / 8 NAND / 8 AND / 4-4 AND-OR-Invert / 4-4 AND-OR / 4-4 OR-AND-Invert / 4-4 OR-AND.This single expandable 2-2-2-2 AOI gate will reduce the boolean expression AB + CD + EF + GH + EXPAND, where EXPAND is the output from another AOI gate. 4086 = Single expandable 4-wide 2-input AND-OR-Invert (AOI).This dual 2-2 AOI gate will reduce the boolean expression AB + CD to 1st output and EF + GH to 2nd output. 4085 = Dual 2-wide 2-input AND-OR-Invert (AOI).The 4572 has a NOR gate and NAND gate (see above). The 4048 is an 8-input gate too (see below). Note: The 4068 & 4078 has two outputs Q and Q. 40107 = Dual 2-Input NAND (136 mA open drain outputs) ( DIP-8 package).4093 = Quad 2-Input NAND ( schmitt trigger inputs) (pinout compatible with 4011).
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Due to the popularity of these parts, other manufacturers released pin-to-pin compatible logic devices and kept the 4000 sequence number as an aid to identification of compatible parts. The earlier datasheets included the internal schematics of the gate architectures and a number of novel designs are able to 'mis-use' this additional information to provide semi-analog functions for timing skew and linear signal amplification.
Although more recent parts are considerably faster, the 4000 devices operate over a wide power supply range (generally 3V to 15V, some devices higher ) and are well suited to unregulated battery powered applications and interfacing with sensitive analogue electronics, where the slower operation may be an EMC advantage. In 1968, the original 4000-series was introduced by RCA. The following is a list of CMOS 4000-series digital logic integrated circuits.