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M74HC182 Schematic ( PDF Datasheet ) - ST Microelectronics

Teilenummer M74HC182
Beschreibung FUNCTION LOOK AHEAD CARRY GENERATOR
Hersteller ST Microelectronics
Logo ST Microelectronics Logo 




Gesamt 12 Seiten
M74HC182 Datasheet, Funktion
M54HC182
M74HC182
FUNCTION LOOK AHEAD CARRY GENERATOR
. HIGH SPEED
tPD = 14 ns (TYP.) at VCC = 5 V
. LOW POWER DISSIPATION
ICC = 4 µA (MAX.) at TA = 25 °C
. HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
. OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
IOH= IOL = 4 mA (MIN.)
. BALANCED PROPAGATION DELAYS
tPLH = tPHL
. WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V to 6 V
. PIN AND FUNCTION COMPATIBLE
WITH 54/74LS182
DESCRIPTION
The M54/74HC182 is a high speed CMOS FUNC-
TION LOOK AHEAD CARRY GENERATOR
fabricated in silicon gate C2MOS 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
across four binary adders or group of adders. They
are cascadable to perform full look-ahead across n-
bit adders. Carry, generate-carry, and
propagate-carry functions are provided as shown in
the pin connection table. When used in conjunction
with the HC181 arithmetic logic unit, these gener-
ators provide high-speed carry look-ahead
capability for any word length. Each HC182 gener-
ates the look-ahead (anticipated carry) across a
group of four ALU’s and, in addition, other carry look-
ahead circuits may be employed to anticipate carry
across sections of four look-ahead packages up to
n-bits. The method of cascading circuits to perform
multi-level look-ahead is illustrated under typical ap-
plication data.
Carry input and output of the ALUs 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, and propagate)
of the look-ahead generators are implemented in
the compatible forms for direct connection to the
ALU. Reinterpretation of carry functions as ex-
plained on the HC181 data sheet are also applicable
to and compatible with the look-ahead generator. All
inputs are equipped with protection circuits against
static discharge and transient excess voltage.
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M 54HC 18 2F 1R
M 74H C1 82 M1 R
M 74HC 18 2B 1R
M 74H C1 82 C1 R
PIN CONNECTIONS (top view)
NC =
No Internal
Connection
March 1993
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M74HC182 Datasheet, Funktion
M54/M74HC182
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Symbol
Parameter
Test Conditions
VCC
(V)
TA = 25 oC
54HC and 74HC
Min. Typ. Max.
Value
-40 to 85 oC
74HC
Min. Max.
-55 to 125 oC
54HC
Min. Max.
Unit
tTLH Output Transition 2.0
tTHL Time
4.5
30 75
8 15
95 110
19 22 ns
6.0 7 13 16 19
tPLH Propagation
2.0
tPHL Delay Time
4.5
(Gn, Pn - Cn+xyz) 6.0
62 135 170 205
17 27 34 41 ns
13 23 29 35
tPLH Propagation
tPHL Delay Time
(Gn, Pn - G)
2.0
4.5
6.0
72 150 190 225
19 30 38 45 ns
14 26 32 38
tPLH Propagation
tPHL Delay Time
(Pn - P)
2.0
4.5
6.0
62 135 170 205
17 27 34 41 ns
13 23 29 35
tPLH Propagation
tPHL Delay Time
(Cn - Cn+xyz)
2.0
4.5
6.0
62 135 170 205
17 27 34 41 ns
13 23 29 35
CIN Input Capacitance
5 10 10 10 pF
CPD (*) Power Dissipation
Capacitance
61
pF
(*) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the following equation. ICC(opr) = CPD VCC fIN + ICC/2 (per FLIP/FLOP)
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M74HC182 pdf, datenblatt
M54/M74HC182
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
© 1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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Besondere Datenblatt

TeilenummerBeschreibungHersteller
M74HC181ARITHMETIC LOGIC UNIT/FUNCTION GENERATORST Microelectronics
ST Microelectronics
M74HC182FUNCTION LOOK AHEAD CARRY GENERATORST Microelectronics
ST Microelectronics

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