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PDF HD74AC538 Data sheet ( Hoja de datos )
| Número de pieza | HD74AC538 | |
| Descripción | 1-of-8 Decoder with 3-State Output | |
| Fabricantes | Hitachi Semiconductor | |
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HD74AC538
1-of-8 Decoder with 3-State Output
Description
The HD74AC538 decoder/demultiplexer accepts three Address (A0 to A2) input signal and decodes them
to select one of eight mutually exclusive outputs. A polarity control input (P) determines whether the
outputs are active LOW or active HIGH. A HIGH signal on either of the active LOW output Enable (OE)
inputs forces all outputs to the high impedance state. Two active HIGH and two active LOW input enables
are available for easy expansion to 1-of-32 decoding with four packages, or for data demultiplexing to 1-of-
8 or 1-of-16 destinations.
Features
• Output Polarity Control
• Data Demultiplexing Capability
• Multiple Enables for Expansion
• Outputs Source/Sink 24 mA
1 page  
HD74AC538
AC Characteristics: HD74AC538
Item
Symbol VCC (V)*1
Propagation delay
t PLH
3.3
An to On
5.0
Propagation delay
t PHL
3.3
An to On
5.0
Propagation delay
t PLH
3.3
E1, or E2 to On
5.0
Propagation delay
t PHL
3.3
E1, or E2 to On
5.0
Propagation delay
t PLH
3.3
E3, or E4 to On
5.0
Propagation delay
t PHL
3.3
E3, or E4 to On
5.0
Propagation delay
t PLH
3.3
P to On
5.0
Propagation delay
t PHL
3.3
P to On
5.0
Propagation delay tPZH 3.3
OEn to On
5.0
Propagation delay
t PZL
3.3
OEn to On
5.0
Propagation delay tPHZ 3.3
OEn to On
5.0
Propagation delay
t PLZ
3.3
OEn to On
5.0
Note: 1. Voltage Range 3.3 is 3.3 V ± 0.3 V
Voltage Range 5.0 is 5.0 V ± 0.5 V
Ta = +25°C
CL = 50 pF
Min Typ
1.0 10.5
1.0 8.0
1.0 9.5
1.0 7.0
1.0 11.0
1.0 8.0
1.0 10.0
1.0 8.0
1.0 11.0
1.0 8.5
1.0 10.5
1.0 8.0
1.0 10.5
1.0 9.0
1.0 9.0
1.0 7.5
1.0 7.0
1.0 5.0
1.0 8.5
1.0 5.5
1.0 7.0
1.0 6.0
1.0 9.0
1.0 7.0
Max
17.5
12.5
17.5
12.0
19.5
14.5
19.5
14.0
19.5
14.5
20.0
15.0
15.5
11.0
15.0
10.5
14.0
8.5
16.5
9.5
14.0
10.5
14.5
10.5
Ta = –40°C to +85°C
CL = 50 pF
Min Max
1.0 20.0
1.0 14.0
1.0 20.0
1.0 14.0
1.0 23.0
1.0 16.5
1.0 23.0
1.0 16.5
1.0 23.0
1.0 17.0
1.0 23.5
1.0 18.0
1.0 17.5
1.0 12.5
1.0 17.0
1.0 11.5
1.0 15.5
1.0 9.5
1.0 19.0
1.0 11.5
1.0 15.5
1.0 11.5
1.0 17.0
1.0 12.0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Capacitance
Item
Input capacitance
Power dissipation capacitance
Symbol
CIN
CPD
Typ
4.5
100
Unit
pF
pF
Condition
VCC = 5.5 V
VCC = 5.0 V
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet HD74AC538.PDF ] | |
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