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PDF 74ACT257PC Data sheet ( Hoja de datos )
| Número de pieza | 74ACT257PC | |
| Descripción | Quad 2-Input Multiplexer with 3-STATE Outputs | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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November 1988
Revised November 1999
74AC257 • 74ACT257
Quad 2-Input Multiplexer with 3-STATE Outputs
General Description
The AC/ACT257 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 out-
puts 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-ori-
ented systems.
Features
s ICC and IOZ reduced by 50%
s Multiplexer expansion by tying outputs together
s Noninverting 3-STATE outputs
s Outputs source/sink 24 mA
s ACT257 has TTL-compatible inputs
Ordering Code:
Order Number Package Number
Package Description
74AC257SC
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body
74AC257SJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74AC257MTC
MTC16
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74AC257PC
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
74ACT257SC
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body
74ACT257SJ
74ACT257MTC
M16D
MTC16
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
www.DataSheet4U.com
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74ACT257PC
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
S
OE
I0a–I0d
I1a–I1d
Za–Zd
Description
Common Data Select Input
3-STATE Output Enable Input
Data Inputs from Source 0
Data Inputs from Source 1
3-STATE Multiplexer Outputs
FACT is a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation DS009949
www.fairchildsemi.com
1 page  
AC Electrical Characteristics for ACT
Symbol
Parameter
tPLH Propagation Delay
In to Zn
tPHL Propagation Delay
In to Zn
tPLH Propagation Delay
S to Zn
tPHL Propagation Delay
S to Zn
tPZH Output Enable Time
tPZL Output Enable Time
tPHZ Output Disable Time
tPLZ Output Disable Time
Note 8: Voltage Range 5.0 is 5.0V ± 0.5V
VCC
(V)
(Note 8)
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
Min
1.5
2.0
2.0
2.5
2.0
2.0
2.5
2.0
Capacitance
Symbol
CIN
CPD
Parameter
Input Capacitance
Power Dissipation Capacitance
Typ
4.5
50.0
TA = +25°C
CL = 50 pF
Typ
5.0
Max
7.0
6.0 7.5
7.0 9.5
7.0 10.5
6.0 8.0
6.0 8.0
6.5 9.0
6.0 7.5
TA = −40°C to +85°C
CL = 50 pF
Min Max
1.0 7.5
1.5 8.5
1.5 10.5
2.0 11.5
1.5 9.0
1.5 9.0
1.5 10.0
1.5 8.5
Units
pF
pF
VCC = OPEN
VCC = 5.0V
Conditions
Units
ns
ns
ns
ns
ns
ns
ns
ns
5 www.fairchildsemi.com
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet 74ACT257PC.PDF ] | |
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