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The 7400 series is a popular logic family of transistor–transistor logic (TTL) integrated circuits (ICs). [ 3 ] In 1964, Texas Instruments introduced the SN5400 series of logic chips, in a ceramic semiconductor package .
In the mid-1960s, the original 7400-series integrated circuits were introduced by Texas Instruments with the prefix "SN" to create the name SN74xx. Due to the popularity of these parts, other manufacturers released pin-to-pin compatible logic devices and kept the 7400 sequence number as an aid to identification of compatible parts. However ...
File:7400 vs 4011.png Composed by Audrius Meskauskas. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License , Version 1.2 or any later version published by the Free Software Foundation ; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
The 74181 is a 4-bit slice arithmetic logic unit (ALU), implemented as a 7400 series TTL integrated circuit. Introduced by Texas Instruments in February 1970, [1] it was the first complete ALU on a single chip. [2] It was used as the arithmetic/logic core in the CPUs of many historically significant minicomputers and other devices.
HCMOS ("high-speed CMOS") is the set of specifications for electrical ratings and characteristics, forming the 74HC00 family, a part of the 7400 series of integrated circuits. [ 1 ] The 74HC00 family followed, and improved upon, the 74C00 series (which provided an alternative CMOS logic family to the 4000 series but retained the part number ...
Several members of the 7400 series of integrated circuits can be used as address decoders. For example, when used as an address decoder, the 74154 [ 3 ] provides four address inputs and sixteen (i.e., 2 4 ) device selector outputs.
TTL 7400-series logic family: (in past decades, a number of AOI parts were available in the 7400 family, but currently most are obsolete (no longer manufactured)) SN5450 = dual 2-2 AOI gate, one is expandable [6] (SN54 is military version of SN74) SN74LS51 = 2-2 AOI gate and 3-3 AOI gate [4] SN54LS54 = single 2-3-3-2 AOI gate [9]
The text below is intended to explain the use of the 76477 in the demo circuit shown at the right. SW1 is a five position rotary switch that selects which capacitor controls the one-shot circuit that sets the envelope timing. SW24 (toggle or momentary) is the one-shot trigger switch, closed position is active.