SN54LS381A, SN54S381, SN74LS381A, SN54LS382A, SN74LS382A,SN74S381 ARITHMETIC LOGIC UNITS/FUNCTION GENERATORS

SDLS168 - JANUARY 1981 - REVISED MARCH 1988

PRODUCTION DATA documents contain information current as of publicationdate. Products conform to specifications per the terms of Texas Instrumentsstandard warranty. Production processing does not necessarily include testingof all parameters.

features

Fully Parallel 4-Bit ALUs in 20-Pin Package for 0.300-Inch Row Spacing
Ideally Suited for High-Density Economical Processors
'LS381A and 'S381 Feature G\ and P\ Outputs for Look-AheadCarry Cascading
'LS382A Features Ripple Carry (C_n+4) and Overflow (OVR) Outputs
Arithmetic and Logic Operations Selected Specifically to Simplify SystemImplementation:
- A Minus B
- B Minus A
- A Plus B
- and Five Other Functions

description

The 'LS381A, 'S381 and 'LS382A are low-power Schottky and Schottky TTLarithmetic logic units (ALUs)/function generators that perform eight binaryarithmetic/logic operations on two 4-bit words as shown in the function table.The exclusive-OR, AND, or OR function of the two Boolean variables is providedwithout the use of external circuitry. Also, the outputs can be cleared (low)or preset (high) as desired. The 'LS381A and 'S381 provide two cascade outputs(P\ and G\ for expansion utilizing SN54S182/SN74S182 look-aheadcarry generators. The 'LS382 provides a C_n+4) output to ripplethe carry to the C_n input of the next stage. The 'LS382A detectsand indicates two's complement overflow condition via the OVR output. Theoverflow output is logically equivalent to C_n+3 ⌖ C_n+4. When the 'LS382A is cascaded to handle word lengths longer thanfour bits in length, only the most significant overflow (OVR) output is used.

The SN54' family is characterized for operation over the full militarytemperature range of -55°C to 125°C. The SN74' family is characterizedfor operation from 0°C to 70°C.

Title: ARITHMETIC LOGIC UNITS/FUNCTION GENERATORS
Product Family: ALU
Device Functionality: ARITHMETIC LOGIC UNIT
Orderable Devices: SN54S381J, SNJ54S381FK, SNJ54S381J, SNJ54S381W, SN74LS381AN, SN74LS382AN, SN74LS382AN3, SN74S381N

View the complete PDF datasheet: sdls168.pdf (201 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SN54S381, SN74LS381A, SN74LS382A, SN74S381

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