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PDF M74HC4028 Data sheet ( Hoja de datos )
| Número de pieza | M74HC4028 | |
| Descripción | BCD TO DECIMAL DECODER | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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. HIGH SPEED
tPD = 18 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 4028B
M54HC4028
M74HC4028
BCD TO DECIMAL DECODER
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HC4028F1R M74HC4028M1R
M74HC4028B1R M74HC4028C1R
PIN CONNECTIONS (top view)
DESCRIPTION
The M54/74HC4028 is a high speed CMOS BCD-
TO-DECIMAL DECODER fabricated in silicon gate
C2MOS technology. It has the same high speed per-
formance of LSTTL combined with true CMOS low
power consumption. A BCD code applied to the four
inputs (A to D) provides a high level at the selected
one of the decimal decoded outputs. An illegal BCD
code such as eleven to fifteen gives a low level at
all outputs. The device also can be used as 3-TO-
8-LINE DECODER, when D input is assigned as a
disable input. The device is useful for code conver-
sion, address decoding, memory selection, demulti-
plexing, or read out decoding.
All inputs are equipped with protection circuits
against static discharge and transient excess volt-
age.
October 1992
NC =
No Internal
Connection
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1 page  
M 54/ M74H C4028
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
tPHL Delay Time
2.0
4.5
96 185 230 280
24 37 46 56 ns
6.0 20 31 39 48
CIN Input Capacitance
5 10 10 10 pF
CPD (*) Power Dissipation
Capacitance
39
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
SWITCHING CHARACTERISTICS TEST
WAVEFORM
TEST CIRCUIT ICC (Opr.)
INPUT TRANSITION TIME IS THE SAME AS THAT IN CASE OF
SWITCHING CHARACTERISTICSTEST.
5/10
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet M74HC4028.PDF ] | |
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