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PDF M74HC42 Data sheet ( Hoja de datos )
| Número de pieza | M74HC42 | |
| Descripción | BCD TO DECIMAL DECODER | |
| Fabricantes | ST Microelectronics | |
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M74HC42
BCD TO DECIMAL DECODER
s HIGH SPEED :
tPD = 14ns (TYP.) at VCC = 6V
s LOW POWER DISSIPATION:
ICC =4µA(MAX.) at TA=25°C
s HIGH NOISE IMMUNITY:
VNIH = VNIL = 28 % VCC (MIN.)
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 4mA (MIN)
s BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
s WIDE OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 6V
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 42
DESCRIPTION
The M74HC42 is an high speed CMOS BCD TO
DECIMAL DECODER fabricated with silicon gate
C2MOS technology.
A BCD code applied to the four inputs A-D selects
one of ten decimal outputs Y0 - Y9, which goes
low to fifteen gives a high level at all outputs. This
device also can be used as a 3 to LINE
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
DIP
SOP
TSSOP
M74HC42B1R
M74HC42M1R
T&R
M74HC42RM13TR
M74HC42TTR
DECODER, when the D input is assigned as a
disable input. This device is useful for code
conversion, address decoding, memory selection,
demultiplexing, or readout decoding.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
July 2001
1/9
1 page  
M74HC42
CAPACITIVE CHARACTERISTICS
Test Condition
Value
Symbol
Parameter
VCC
(V)
TA = 25°C
-40 to 85°C -55 to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
CIN Input Capacitance 5.0
CPD Power Dissipation
Capacitance (note 5.0
1)
5 10 10 10 pF
60 pF
1) 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 operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC
TEST CIRCUIT
CL = 50pF or equivalent (includes jig and probe capacitance)
RT = ZOUT of pulse generator (typically 50Ω)
WAVEFORM : PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)
5/9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet M74HC42.PDF ] | |
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