CD40181BMS Datasheet, PDF (1/10 Pages) Intersil Corporation – CMOS 4 Bit Arithmetic Logic Unit

CD40181BMS
December 1992
CMOS 4 Bit Arithmetic Logic Unit
Features
Description
• High Voltage Type (20V Rating)
• Full Look Ahead Carry for Speed Operations on Long
Words
• Generates 16 Logic Functions of Two Boolean Variables
• Generates 16 Arithmetic Functions of Two 4 Bit Binary
Words
• A = B comparator Output Available
• Ripple Carry Input and Output Available
• Typical Addition Time 200ns at VDD = 10V
• 100% Tested for Quiescent Current at 20V
• 5V, 10V and 15V Parametric Ratings
• Maximum Input Current of 1µA at 18V Over Full Pack-
age Temperature Range; 100nA at 18V and +25^oC
• Noise Margin (Over Full Package/Temperature Range)
- 1V at VDD = 5V
- 2V at VDD = 10V
- 2.5V at VDD = 15V
• Standardized Symmetrical Output Characteristics
• Meets All Requirements of JEDEC Tentative Standard
No. 13B, “Standard Specifications for Description of
‘B’ Series CMOS Devices”
Applications
• Parallel Arithmetic Units
• Process Controllers
• Low Power Minicomputers
The CD40181BMS is a low power four bit parallel arithmetic
logic unit (ALU) capable of providing 16 binary arithmetic
operations on two four-bit words and 16 logical functions of
two Boolean variables. The mode control input M selects
logical (M = High) or arithmetic (M = Low) operation. The
four select inputs (S0, S1, S2, and S3) select the desired
logical or arithmetic functions, which include AND, OR,
NAND, NOR and exclusive-OR and-NOR in the logic mode,
and addition, subtraction, decrement, left-shift and straight
transfer in the arithmetic mode, according to the truth table.
The CD40181BMS operation may be interpreted with either
active-low or active-high data at the A and B word inputs and
the function outputs F, by using the appropriate truth table.
The CD40181BMS contains logic for full look ahead carry
operation for fast carry generation using the carry-generate
and carry-propagate outputs G and P for the four bits of the
CD40181BMS. Use of the CD40182BMS look-ahead carry
generator in conjunction with multiple CD40181BMS’s
permits high speed arithmetic operations on long words. A
ripple carry output Cn+4 is available for use in systems
where speed is not of primary importance.
Also included in the CD40181BMS is a comparator output
A = B, which assumes a high level whenever the two four-bit
input words A and B are equal and the device is in the
subtract mode. In addition, relative magnitude information
may be derived from the carry-in input Cn and ripple carry-
out output Cn+4 by placing the unit in the subtract mode and
externally decoding using the information in Table B.
Pinout
CD40181BMS ACTIVE-LOW DATA
TOP VIEW
The CD40181BMS is similar to industry types MC14581 and
74181.
The CD40181BMS is supplied in these 24-lead outline
packages:
B0 1
A0 2
S3 3
S2 4
S1 5
S0 6
Cn 7
M8
F0 9
F1 10
F2 11
VSS 12
24 _VDD
23 A1
22 B1
21 A2
20 B2
19 A3
18 B3
17 G
16 Cn+4
15 P
14 A = B
13 F3
Braze Seal DIP
HNZ
Ceramic Flatpack H4P
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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