74AHC257 Philips Semiconductors, 74AHC257 Datasheet - Page 9

• Manufacturer Part Number: 74AHC257
• Description: Quad 2-input multiplexer; 3-state
• Manufacturer: Philips Semiconductors

Philips Semiconductors
AC CHARACTERISTICS
Type 74AHC257
GND = 0 V; t
Notes
1. Typical values at V
2. Typical values at V
2000 Apr 03
SYMBOL
V
t
t
t
t
t
t
V
t
t
t
t
t
t
PHL
PZH
PHZ
PHL
PZH
PHZ
PHL
PZH
PHZ
PHL
PZH
PHZ
CC
CC
Quad 2-input multiplexer; 3-state
/t
/t
/t
/t
/t
/t
/t
/t
/t
/t
/t
/t
= 3.0 to 3.6 V; note 1
= 4.5 to 5.5 V; note 2
PLH
PLH
PLH
PLH
PZL
PLZ
PZL
PLZ
PZL
PLZ
PZL
PLZ
propagation delay
nI
propagation delay
S to nY
3-state output enable
time OE to nY
3-state output disable
time OE to nY
propagation delay
nI
propagation delay
S to nY
3-state output enable
time OE to nY
3-state output disable
time OE to nY
propagation delay
nI
propagation delay
S to nY
3-state output enable
time OE to nY
3-state output disable
time OE to nY
propagation delay
nI
propagation delay
S to nY
3-state output enable
time OE to nY
3-state output disable
time OE to nY
r
= t
0
0
0
0
to nY; nI
to nY; nI
to nY; nI
to nY; nI
PARAMETER
f
3.0 ns.
CC
CC
1
1
1
1
to nY
to nY
to nY
to nY
= 3.3 V.
= 5.0 V.
see Figs 6
and 8
see Figs 7
and 8
see Figs 6
and 8
see Figs 7
and 8
see Figs 6
and 8
see Figs 7
and 8
see Figs 6
and 8
see Figs 7
and 8
WAVEFORMS
TEST CONDITIONS
15 pF
50 pF
15 pF
50 pF
C
L
9
MIN.
4.2
5.2
4.5
5.1
6.0
7.4
6.4
7.2
2.9
3.5
3.2
3.4
4.2
5.0
4.5
4.9
TYP.
25
9.3
11.0
10.5
9.5
12.8
14.5
14.0
12.0
5.9
6.8
6.8
6.5
7.9
8.8
8.8
7.9
MAX. MIN. MAX.
T
amb
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
40 to +85
( C)
11.0
13.0
12.5
11.0
14.5
16.5
16.0
13.5
7.0
8.0
8.0
7.0
9.0
10.0
10.0
9.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
74AHCT257
MIN.
Product specification
74AHC257;
40 to +125
12.0
14.0
13.5
11.5
16.0
18.5
17.5
14.5
7.5
8.5
8.5
8.5
11.5
12.5
12.5
9.5
MAX.
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns