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參數(shù)資料
| 型號： | M74HC182M1R |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 10-Bit, 3 us Quad DAC, Serial Input, Simultaneous Update, Programmable Settling Time, PowerDown 16-TSSOP 0 to 70 |
| 中文描述： | 功能向前看攜帶發(fā)電機(jī) |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 260K |
| 代理商： | M74HC182M1R |
M54HC182
M74HC182
March 1993
FUNCTION LOOK AHEAD CARRY GENERATOR
.
LOWPOWER DISSIPATION
I
CC
= 4
μ
A(MAX.) at T
A
= 25
°
C
.
HIGH NOISE IMMUNITY
V
NIH
= V
NIL
= 28 % V
CC
(MIN.)
.
OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
.
SYMMETRICAL OUTPUT IMPEDANCE
IOH
= I
OL
= 4 mA(MIN.)
.
BALANCEDPROPAGATION DELAYS
t
PLH
= t
PHL
.
WIDE OPERATING VOLTAGE RANGE
V
CC
(OPR) = 2 V to 6 V
.
PIN ANDFUNCTION COMPATIBLE
WITH 54/74LS182
B1R
(Plastic Package)
ORDER CODES :
M54HC182F1R
M74HC182B1R
M74HC182M1R
M74HC182C1R
F1R
(CeramicPackage)
M1R
(MicroPackage)
C1R
(Chip Carrier)
PIN CONNECTIONS
(top view)
NC =
No Internal
Connection
DESCRIPTION
The M54/74HC182 is a high speed CMOS FUNC-
TION
LOOK AHEAD
fabricated insilicon gate C
2
MOS technology. It has
the same high speed performance of LSTTL com-
bined with true CMOS low power consumption.
These circuit are capable of anticipating a carry
acrossfour binary adders or group of adders. They
are cascadable to perform full look-ahead across n-
bit
adders.
Carry,
propagate-carry functions are providedas shown in
the pin connection table. When used in conjunction
with the HC181 arithmetic logic unit, these gener-
ators
provide
high-speed
capability for any word length. Each HC182 gener-
ates the look-ahead (anticipated carry) across a
groupoffourALU’sand,inaddition,other carrylook-
ahead circuits may be employed to anticipate carry
across sections of four look-ahead packages up to
n-bits. Themethod of cascading circuits to perform
multi-level look-ahead isillustrated undertypical ap-
plication data.
Carry input and output of theALUs are in their true
form, and the carry propagate (P) and carry gener-
ate (G) are in negated form ; therefore, the carry
functions(inputs,outputs, generate, andpropagate)
of the look-ahead generators are implemented in
the compatible forms for direct connection to the
ALU. Reinterpretation of carry functions as ex-
plained ontheHC181datasheetare alsoapplicable
toandcompatible withthe look-ahead generator. All
inputs are equipped with protection circuits against
staticdischarge and transient excess voltage.
.
HIGH SPEED
t
PD
= 14 ns(TYP.) at V
CC
= 5 V
CARRY
GENERATOR
generate-carry,
and
carry
look-ahead
1/12
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