|
|
PDF M74HC390 Data sheet ( Hoja de datos )
| Número de pieza | M74HC390 | |
| Descripción | DUAL DECADE COUNTER | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de M74HC390 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
|
No Preview Available !
M74HC390
Dual decade counter
Features
■ HIgh Speed:
fMAX = 79MHz (Typ.) at VCC = 6V
■ Low power dissipation:
)ICC = 4µA (Max.) at TA = 25°C
t(s■ High noise immunity:
cVNIH = VNIL = 28 % VCC (Min.)
du■ Balanced propagation delays:
rotPLH ≅ tPHL
P■ Wide operating voltage range:
teVCC (Opr) = 2V to 6V
le■ Pin and function compatible with 74 series 390
soDescription
ObThe M74HC390 is an high speed CMOS dual
-decade counter fabricated with silicon gate
)C2MOS technology.
t(sThis dual decade counter contains two
ucindependent ripple carry counters. Each counter
dis composed of a divide by two and divide by five
rocounter. The divide by two and divide by five
Pcounters can be cascaded to form dual decade,
dual biquinary, or various combination up to a
Obsoletesingle divide by 100 counter.
DIP-16
SO-16
Each 4-bit counter is increased on the high to low
transition (negative edge) of the clock input, and
each has an independent clear input. When clear
is set low all four bits of each counter are set to
low. This enables count truncation and allows the
implementation of divide by N counter
configuration.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
Order codes
Part number
Package
Packaging
M74HC390B1R
M74HC390RM13TR
DIP-14
SO-14
Tube
Tape and reel
July 2006
Rev 2
1/17
www.st.com
17
1 page  
M74HC390
3 Truth table
Truth table
Table 2. Truth table
Outputs
COUNT
BCD COUNT (1)
BI-QUINARY (2)
QD QC QB QA QA QD QC QB
0 LLLLLLLL
1 LLLHLLLH
2 LLHL
t(s)3 L L H H
4 LHLL
uc5 L H L H
rod6 L H H L
P7 L H H H
te8 H L L L
le9 H L L H
so1. Output QA is connected to input CLOCK B for BCD count.
b2. Output QD is connected to input CLOCK A for bi-quinary count.
- OTable 3. Truth table
t(s)Inputs
CLOCK A
CLOCK B
CLEAR
ucX X H
rod X L
Obsolete PX L
L LHL
L LHH
LHL L
HHL L
HL LH
HLHL
H L HH
HHL L
Outputs
QA QB QC QD
LLLL
BINARY COUNT UP
QUINARY COUNT UP
5/17
5 Page 
M74HC390
Electrical characteristics
Table 8. 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 10
10
10 pF
Power
CPD
dissipation
capacitance
84
pF
(1)
)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
Obsolete Product(s) - Obsolete Product(sobtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC
11/17
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet M74HC390.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| M74HC390 | DUAL DECADE COUNTER | ST Microelectronics |
| M74HC393 | DUAL BINARY COUNTER | ST Microelectronics |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |