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PDF HD74ACT298 Data sheet ( Hoja de datos )
| Número de pieza | HD74ACT298 | |
| Descripción | Quad 2-Input Multiplexer with Storage | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD74AC298/HD74ACT298
Quad 2-Input Multiplexer with Storage
Description
This device is a high-speed multiplexer with storage. It selects four bits of data from two sources (Ports)
under the control of a common Select input (S). The selected data is transferred to the 4-bit output register
synchronous with the HIGH-to-LOW transition of the Clock input (CP). The 4-bit register is fully edge
triggered. The Data inputs (I0 and I1) and Select input (S) must be stable only one setup time prior to the
HIGH-to-LOW transition of the clock for predictable operation.
Features
• Outputs Source/Sink 24 mA
• HD74ACT298 has TTL-Compatible Inputs
Pin Arrangement
I1b 1
I1a 2
I0a 3
I0b 4
I1c 5
I1d 6
I0d 7
GND 8
(Top view)
16 VCC
15 Qa
14 Qb
13 Qc
12 Qd
11 CP
10 S
9 I0c
1 page  
HD74AC298/HD74ACT298
AC Operating Requirements: HD74ACT298
Item
Setup time, HIGH or LOW
Dn or S to CP
Hold time, HIGH or LOW
Dn to CP
Hold time, HIGH or LOW
S to CP
Symbol
t su
Ta = +25°C
CL = 50 pF
VCC (V)*1 Typ
5.0 3.5
th 5.0 –5.0
th 5.0 –0.5
Pulse with
tw 5.0
Note: 1. Voltage Range 5.0 is 5.0 V ± 0.5 V
3.0
Ta = –40°C
to +85°C
CL = 50 pF
Guaranteed Minimum
5.5 6.5
1.0 1.0
1.0 1.0
7.0 8.0
Unit
ns
ns
ns
ns
Capacitance
Item
Input capacitance
Power dissipation capacitance
Symbol
CIN
CPD
Typ
4.5
30
Unit
pF
pF
Condition
VCC = 5.5 V
VCC = 5.0 V
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet HD74ACT298.PDF ] | |
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