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PDF HD74HC258 Data sheet ( Hoja de datos )
| Número de pieza | HD74HC258 | |
| Descripción | Quad. 2-to-1-line Data Selectors/Multiplexers(with 3-state outputs) | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD74HC258
Quad. 2-to-1-line Data Selectors/Multiplexers
(with 3-state outputs)
Description
The large output drive capability coupled with the 3-state feature make this device ideal for interfacing with
bus lines in a bus organized system. When the output control input line is taken high, the outputs of all four
multiplexers are sent into a high impedance state. When the output control line is low, the select input
chooses whether the A or B input is used.
Features
• High Speed Operation: tpd (Data to Y) = 11 ns typ (CL = 50 pF)
• High Output Current: Fanout of 15 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
Inputs
Output Control Select
A
HX
X
LL
L
LL
H
LH
X
LH
X
Notes H: high level
L : low level
X: irrelevant
Z: off (high-impedance) state of a 3-state output
B
X
X
X
L
H
Outputs
Y
Z
H
L
H
L
1 page  
HD74HC258
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
— — 115 —
— 11 23 —
— — 20 —
Max Unit
145 ns
29
25
2.0 — — 115 — 145
4.5 — 13 23 — 29
6.0 — — 20 — 25
Output enable
time
t ZL
2.0 — — 150 — 190 ns
4.5 — 11 30 — 38
6.0 — — 26 — 33
tZH 2.0 — — 150 — 190 ns
4.5 — 13 30 — 38
6.0 — — 26 — 33
Output disable
time
t LZ
2.0 — — 150 — 190 ns
4.5 — 13 30 — 38
6.0 — — 26 — 33
tHZ 2.0 — — 150 — 190 ns
4.5 — 18 30 — 38
6.0 — — 26 — 33
Output rise/fall
time
t TLH
t THL
2.0 — — 60 — 75 ns
4.5 — 4 12 — 15
6.0 — — 10 — 13
Input capacitance Cin — — 5 10 — 10 pF
Test Conditions
Data to Y
Select to Y
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet HD74HC258.PDF ] | |
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