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PDF MC74AC257 Data sheet ( Hoja de datos )
| Número de pieza | MC74AC257 | |
| Descripción | QUAD 2-INPUT MULTIPLEXER | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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MC74AC257, MC74ACT257
Quad 2-Input Multiplexer
with 3-State Outputs
The MC74AC257/74ACT257 is a quad 2−input multiplexer with
3−state outputs. Four bits of data from two sources can be selected
using a Common Data Select input. The four outputs present the
selected data in true (noninverted) form. The outputs may be switched
to a high impedance state by placing a logic HIGH on the common
Output Enable (OE) input, allowing the outputs to interface directly
with bus−oriented systems.
• Multiplexer Expansion by Tying Outputs Together
• Noninverting 3−State Outputs
• Outputs Source/Sink 24 mA
• ′ACT257 Has TTL Compatible Inputs
• These are Pb−Free Devices
VCC OE I0c I1c Zc I0d I1d Zd
16 15 14 13 12 11 10 9
12345678
S I0a I1a Za I0b I1b Zb GND
Figure 1. Pinout: 16−Lead Packages Conductors
(Top View)
www.onsemi.com
16
1
16
1
MARKING
DIAGRAMS
16
SOIC−16
D SUFFIX
CASE 751B
1
xxx257G
AWLYWW
TSSOP−16
DT SUFFIX
CASE 948F
16
xxx
257
ALYWG
G
1
xxx = AC or ACT
A = Assembly Location
WL or L = Wafer Lot
Y = Year
WW or W = Work Week
G or G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
© Semiconductor Components Industries, LLC, 2015
March, 2015 − Rev. 8
1
Publication Order Number:
MC74AC257/D
1 page  
MC74AC257, MC74ACT257
AC CHARACTERISTICS (For Figures and Waveforms − See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)
74AC
74AC
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
Min Typ Max
TA = −40°C
to +85°C
CL = 50 pF
Min Max
Unit
Fig.
No.
tPLH
tPHL
tPLH
tPHL
tPZH
Propagation Delay
In to Zn
Propagation Delay
In to Zn
Propagation Delay
S to Zn
Propagation Delay
S to Zn
Output Enable Time
3.3 1.5 5.0 8.5 1.0 9.0
5.0 1.5 4.0 6.0 1.0 7.0
3.3 1.5 6.0 8.5 1.0 9.0
5.0 1.5 4.5 6.0 1.0 7.0
3.3 1.5 7.0 10.5 1.5 11.5
5.0 1.5 5.0 7.5 1.0 8.5
3.3 1.5 7.5 10.5 1.5 11.5
5.0 1.5 5.5 7.5 1.0 8.5
3.3 1.5 6.5 9.5 1.0 10.5
5.0 1.5 5.0 7.5 1.0 8.5
ns
ns
ns
ns
ns
3−5
3−5
3−6
3−6
3−7
tPZL Output Enable Time
3.3 1.5 5.5 9.0 1.0 10.0
5.0 1.5 5.0 8.5 1.0 9.5
ns
3−8
tPHZ
Output Disable Time
3.3 1.5 5.5 10.0 1.0 11.0
5.0 1.5 5.0 9.0 1.0 10.0
ns
3−7
tPLZ Output Disable Time
3.3 1.5 5.5 9.0 1.0 10.0
5.0 1.5 5.0 8.0 1.0 9.0
ns
3−8
*Voltage Range 3.3 V is 3.3 V ±0.3 V.
*Voltage Range 5.0 V is 5.0 V ±0.5 V.
www.onsemi.com
5
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| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet MC74AC257.PDF ] | |
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