
7-1410
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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CD40182BMS
CMOS Look-Ahead Carry Generator
Description
The CD40182BMS is a high-speed look-ahead carry gener-
ator capable of anticipating a carry across four binary adders
or groups of adders. The CD40182BMS is cascadable to
perform full look-ahead across n-bit adders. Carry, propa-
gate-carry, and generate-carry functions are provided as
enumerated in the terminal designation below.
The CD40182BMS, when used in conjuction with the
CD40181BMS arithmetic logic unit (ALU), provides full high-
speed look-ahead carry capability for up to n-bit words. Each
CD40182BMS generates the look-ahead (anticipated carry)
across a group of four ALU’s. In addition, other
CD40182BMS’s may be employed to anticipate the carry
across sections of four look-ahead blocks up to n-bits. Carry
inputs and outputs of the CD40181BMS are active-high
logic, and carry-generate (G) and carry-propagate (P) out-
puts are active-low. Therefore the inputs and outputs of the
CD40182BMS are compatible.
The CD40182BMS is supplied in these 16-lead outline
packages:
The CD40182BMS is similar to industry type MC14582.
Braze Seal DIP
Frit Seal DIP
Ceramic Flatpack
H4V
H1E
H6P
Features
High Voltage Type (20V Rating)
Generates High-Speed Carry Across Four Adders or
Adder Groups
High-Speed Operation
- tPHL, tPLH =100 ns (typ) at VDD = 10V
Cascadable for Fast Carries Over N Bits
Designed for Use with CD40181BMS ALU
100% Tested for Quiescent Current at 20V
5V, 10V and 15V Parametric Ratings
Standardized Symmetrical Output Characteristics
Maximum Input Current of 1
μ
A at 18V Over Full Pack-
age Temperature Range; 100nA at 18V and +25
o
C
Noise Margin (Over Full Package/Temperature Range)
- 1V at VDD = 5V
- 2V at VDD = 10V
- 2.5V at VDD = 15V
Meets All Requirements of JEDEC Tentative Standard
No. 13B, “Standard Specifications for Description of
‘B’ Series CMOS Devices”
Applications
High-Speed Parallel Arithmetric Units
Multi-Level Look-Ahead Carry Generation for Long
Word Lengths
December 1992
File Number
3362
Pinout
CD40182BMS
TOP VIEW
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
G1
P1
G0
P0
G3
P3
VSS
P
VDD
G2
Cn
Cn + x
Cn + y
G
Cn + z
P2
Functional Diagram
G0
G1
G2
G3
Cn
3
1
14
5
13
P0
P1
P2
P3
4
2
15
6
G
P
12
11
9
7
10
P
G
Cn + x
Cn + y
Cn + z
VDD = 16
VSS = 8