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PDF 74AHCT259 Data sheet ( Hoja de datos )
| Número de pieza | 74AHCT259 | |
| Descripción | 8-bit addressable latch | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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INTEGRATED CIRCUITS
DATA SHEET
74AHC259; 74AHCT259
8-bit addressable latch
Product specification
File under Integrated Circuits, IC06
2000 Mar 14
1 page  
Philips Semiconductors
8-bit addressable latch
PINNING
PIN
1, 2 and 3
4, 5, 6, 7, 9, 10, 11 and 12
8
13
14
15
16
SYMBOL
A0, A1 and A2
Q0 to Q7
GND
D
LE
MR
VCC
Product specification
74AHC259;
74AHCT259
DESCRIPTION
address input
latch outputs
ground (0 V)
data input
latch enable input (active LOW)
conditional reset input (active LOW)
DC supply voltage
handbook, halfpage
A0 1
A1 2
A2 3
Q0 4
Q1 5
Q2 6
Q3 7
GND 8
16 VCC
15 MR
14 LE
13 D
259
12 Q7
11 Q6
10 Q5
9 Q4
MNA574
Fig.1 Pin configuration.
handbook, halfpage
14
LE
Q0
4
13 D
Q1 5
Q2 6
Q3 7
1 A0
9
Q4
2
A1
10
Q5
3
A2
11
Q6
12
Q7
MR
15 MNA573
Fig.2 Logic symbol.
2000 Mar 14
5
5 Page 
Philips Semiconductors
8-bit addressable latch
Product specification
74AHC259;
74AHCT259
SYMBOL PARAMETER
TEST CONDITIONS
WAVEFORMS CL
Tamb (°C)
25 −40 to +85 −40 to +125 UNIT
MIN. TYP. MAX. MIN. MAX. MIN. MAX.
VCC = 4.5 to 5.5 V; note 2
tPHL/tPLH propagation delay see Figs 5 and 11 15 pF −
D to Qn
propagation delay see Figs 6 and 11
An to Qn
−
propagation delay see Figs 7 and 11
LE to Qn
−
tPHL propagation delay see Figs 8 and 11
MR to Qn
−
tPHL/tPLH propagation delay see Figs 5 and 11 50 pF −
D to Qn
propagation delay see Figs 6 and 11
An to Qn
−
propagation delay see Figs 7 and 11
LE to Qn
−
tPHL propagation delay see Figs 8 and 11
MR to Qn
−
tW LE pulse width see Figs 7 and 11 5.0
HIGH or LOW
MR pulse width
LOW
see Figs 8 and 11
5.0
tsu set-up time see Figs 9,
D to LE, An to LE 10 and 11
4.0
th hold time D to LE, see Figs 9 and 11 1.0
An to LE
4.1
5.3
4.3
3.9
5.3
6.5
5.5
5.1
−
−
−
−
7.5 1.0 9.0 1.0
9.5 1.0 11.5 1.0
8.0 1.0 9.5 1.0
7.0 1.0 8.5 1.0
9.5 1.0 11.0 1.0
11.5 1.0 13.5 1.0
10.0 1.0 11.5 1.0
9.0 1.0 10.5 1.0
− 5.0 − 5.0
− 5.0 − 5.0
− 4.0 − 4.0
− 1.0 − 1.0
10.0 ns
12.5 ns
10.5 ns
9.5 ns
12.0 ns
15.0 ns
12.5 ns
11.5 ns
− ns
− ns
− ns
− ns
Notes
1. Typical values at VCC = 3.3 V.
2. Typical values at VCC = 5.0 V.
2000 Mar 14
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet 74AHCT259.PDF ] | |
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