http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf



National Semiconductor Electronic Components Datasheet


74F182

Carry Lookahead Generator



No Preview Available !

74F182 pdf
December 1994
54F 74F182
Carry Lookahead Generator
General Description
The ’F182 is a high-speed carry lookahead generator It is
generally used with the ’F181 or ’F381 4-bit arithmetic logic
units to provide high-speed lookahead over word lengths of
more than four bits
Features
Y Provides lookahead carries across a group of four
ALUs
Y Multi-level lookahead high-speed arithmetic operation
over long word lengths
Y Guaranteed 4000V minimum ESD protection
Commercial
74F182PC
74F182SJ (Note 1)
Military
54F182DM (Note 2)
54F182FM (Note 2)
54F182LM (Note 2)
Package
Number
N16E
J16A
M16D
W16A
E20A
Package Description
16-Lead (0 300 Wide) Molded Dual-In-Line
16-Lead Ceramic Dual-In-Line
16-Lead (0 300 Wide) Molded Small Outline EIAJ
16-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier Type C
Note 1 Devices also available in 13 reel Use suffix e SCX and SJX
Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB
Logic Symbols
Connection Diagrams
IEEE IEC
Pin Assignment for
DIP SOIC and Flatpak
Pin Assignment
for LCC
TL F 9492–6
TL F 9492 – 1
TL F 9492 – 2
TL F 9492–3
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 9492
RRD-B30M105 Printed in U S A



No Preview Available !

74F182 pdf
Unit Loading Fan Out
Pin Names
Description
Cn
G0 G2
G1
G3
P0 P1
P2
P3
CnaxbCnaz
G
P
Carry Input
Carry Generate Inputs (Active LOW)
Carry Generate Input (Active LOW)
Carry Generate Input (Active LOW)
Carry Propagate Inputs (Active LOW)
Carry Propagate Input (Active LOW)
Carry Propagate Input (Active LOW)
Carry Outputs
Carry Generate Output (Active LOW)
Carry Propagate Output (Active LOW)
54F 74F
UL
HIGH LOW
10 20
1 0 14 0
1 0 16 0
10 80
10 80
10 60
10 40
50 33 3
50 33 3
50 33 3
Input IIH IIL
Output IOH IOL
20 mA b1 2 mA
20 mA b8 4 mA
20 mA b9 6 mA
20 mA b4 8 mA
20 mA b4 8 mA
20 mA b3 6 mA
20 mA b2 4 mA
b1 mA 20 mA
b1 mA 20 mA
b1 mA 20 mA
Functional Description
The ’F182 carry lookahead generator accepts up to four
pairs of Active LOW Carry Propagate (P0 – P3) and Carry
Generate (G0 – G3) signals and an Active HIGH Carry input
(Cn) and provides anticipated Active HIGH carries (Cn a x
Cnay Cnaz) across four groups of binary adders The
’F182 also has Active LOW Carry Propagate (P) and Carry
Generate (G) outputs which may be used for further levels
of lookahead The logic equations provided at the outputs
are
Cnax
Cnay
Cnaz
e G0 a P0Cn
e G1 a P1G0 a P1P0Cn
e G2 a P2G1 a P2P1G0 a P2P1P0Cn
G e G3 a P3G2 a P3P2G1 a P3P2P1G0
P e P2P2P1P0
Also the ’F182 can be used with binary ALUs in an active
LOW or active HIGH input operand mode The connections
(Figure 1) to and from the ALU to the carry lookahead gen-
erator are identical in both cases Carries are rippled be-
tween lookahead blocks The critical speed path follows the
circled numbers There are several possible arrangements
for the carry interconnects but all achieve about the same
speed A 28-bit ALU is formed by dropping the last ’F181 or
’F381
FIGURE 1 32-Bit ALU with Rippled Carry between 16-Bit Lookahead ALUs
ALUs may be either ’F181 or ’F381
TL F 9492 – 5
2



Part Number 74F182
Description Carry Lookahead Generator
Maker National - National
Total Page 8 Pages
PDF Download
74F182 pdf
Download PDF File
74F182 pdf
View for Mobile




Featured Datasheets

Part Number Description Manufacturers PDF
74F10 54F10 Triple 3-Input NAND Gate (Rev. A) 74F10
Texas Instruments
PDF
74F10 Triple 3-input NAND gate 74F10
NXP
PDF
74F10 Triple 3-Input NAND Gate 74F10
Fairchild Semiconductor
PDF
74F10 Triple 3-Input NAND Gate 74F10
National Semiconductor
PDF
74F1056 8-Bit Schottky Barrier Diode Array 74F1056
Fairchild Semiconductor
PDF
74F1056SC 8-Bit Schottky Barrier Diode Array 74F1056SC
Fairchild Semiconductor
PDF


Part Number Start With

0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

site map

webmaste! click here

contact us

Buy Components