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PDF HD74HC682 Data sheet ( Hoja de datos )
| Número de pieza | HD74HC682 | |
| Descripción | 8-bit Magnitude Comparator | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD74HC682/HD74HC684
8-bit Magnitude Comparator
Description
These magnitude comparators perform comparisons of two eight-bit binary or BCD words. All types
provide P=Q outputs and provide P>Q outputs. The HD74HC682 features 20 k pullup termination
resistors on the Q inputs for analog or switch data.
Type
HD74HC682
HD74HC684
P=Q
Yes
Yes
P>Q
Yes
Yes
Output Enable
No
No
20 kΩ Pullup
Yes
No
Features
• High Speed Operation
• 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
Outputs
P, Q
P=Q
P>Q
P=Q
L
H
P>Q
H
L
P<Q
Note:
HH
1. The P<Q function can be generated by applying the P=Q and P>Q Outputs to a 2-input NAND
gate.
1 page  
HD74HC682/HD74HC684
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
— — 175 —
— — 35 —
— — 30 —
Max Unit
220 ns
44
37
tPLH 2.0 — — 200 — 250 ns
tPHL 4.5 — — 40 — 50
6.0 — — 34 — 43
Output rise/fall
time
t TLH
t THL
2.0 — — 60 — 75 ns
4.5 — — 12 — 15
6.0 — — 10 — 13
Input capacitance Cin — — 5 10 — 10 pF
Test Conditions
P or Q to P=Q
P or Q to P>Q
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet HD74HC682.PDF ] | |
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