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Since there are numerous 7400-series parts, the following groups related parts to make it easier to pick a useful part number. This section only includes combinational logic gates. For part numbers in this section, "x" is the 7400-series logic family, such as LS, ALS, HCT, AHCT, HC, AHC, LVC, ... Normal inputs / push–pull outputs
The second line of numbers (7645) is a date code; this chip was manufactured in the 45th week of 1976. [2] 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.
Unfortunately the serial number does not specify the same type of gate in each family, e.g. while an FJH131 is a quadruple 2-input NAND gate (like the 7400), an FCH131 is a dual 4-input NAND gate, [8] and an FLH131 is an 8-input NAND gate (equivalent to 7430). [10]
7400 US, UK, Australia: Unmanned aerial vehicle lost link. [15] [16] [17] 7500: ICAO: Aircraft hijacking. [3] [7] 7501–7577 US: Reserved for use by Continental NORAD Region (CONR). [3] 7600: ICAO: Radio failure (lost communications). [3] [7] 7601–7607 US: Reserved for special use by FAA. [3] 7610–7676 US: External ARTCC subset (block of ...
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Model 7400 Carbine Manufactured from 1988 to 2004, the carbine version featured a shortened 18 in (46 cm) barrel. [3] [1] Model 7400 Special Purpose Introduced in 1993, the special purpose model featured a non-reflective finish and sling swivels. The SP model was discontinued a year later in December of 1994. [3] Model 7400 Synthetic
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