|
|
PDF HD74HC688 Data sheet ( Hoja de datos )
| Número de pieza | HD74HC688 | |
| Descripción | 8-bit Magnitude Comparator | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de HD74HC688 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
|
No Preview Available !
HD74HC688
8-bit Magnitude Comparator
Description
The HD74HC688 compares bit for bit two 8-bit words and indicates whether or not they are equal. The
P=Q output indicates equality when it is low.
A single active low enable is provided to facilitate cascading of several packages and enable comparison of
words greater than 8-bits.
This device is useful in memory block decoding applications, where memory block enable signals must be
generated from computer address information.
Features
• High Speed Operation: tpd (P or Q to Output) = 17 ns typ (CL = 50 pF
• High Output Current: Fanout of 10 LSTTL Loads
• Wide Operating Voltage: VCC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
Input
Data P, Q
P=Q
P>Q
P<Q
X
Enable G
L
L
L
H
P=Q
L
H
H
H
1 page  
HD74HC688
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C
Ta = –40 to
+85°C
Item
Symbol
Propagation delay tPLH
time
t PHL
VCC (V)
2.0
4.5
6.0
Min Typ Max Min
— — 210 —
— 17 42 —
— — 36 —
Max Unit
265 ns
53
45
tPLH 2.0 — — 120 — 150 ns
tPHL 4.5 — 9 24 — 30
6.0 — — 20 — 26
Output rise/fall
time
t TLH
t THL
2.0 — — 75 — 95 ns
4.5 — 5 15 — 19
6.0 — — 13 — 16
Input capacitance Cin — — 5 10 — 10 pF
Test Conditions
P or Q to output
Enable to P=Q
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet HD74HC688.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| HD74HC680 | 12-bit Address Comparator | Hitachi Semiconductor |
| HD74HC682 | 8-bit Magnitude Comparator | Hitachi Semiconductor |
| HD74HC684 | 8-bit Magnitude Comparator | Hitachi Semiconductor |
| HD74HC688 | 8-bit Magnitude Comparator | Hitachi Semiconductor |
| 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 |