PI74FCT2821T Ver la hoja de datos (PDF) - Pericom Semiconductor
Número de pieza
componentes Descripción
Lista de partido
PI74FCT2821T Datasheet PDF : 7 Pages
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PI74FCT821T/823T/825T
(25Ω Series) P174FCT2821T/2823T
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PI74FCT821/2821T Product Pin Configuration
OE 1
24 Vcc
D0 2
23 Y0
D1 3
22 Y1
D2 4 24-PIN 21 Y2
D3 5 P24 20 Y3
D4 6 Q24 19 Y4
D5 7
D6 8
R24
S24
18 Y5
17 Y6
D7 9
16 Y7
D8 10
15 Y8
D9 11
14 Y9
GND 12
13 CP
Product Pin Description
Pin Name
OE
CP
DN
YN
CLR
EN
GND
VCC
Description
Output Enable Input (Active LOW)
Clock Pulse for the register. Enters data on
LOW-to-HIGH transition
Data Inputs
3-State Outputs
Clear Input (Active LOW)
(823/825/2823 Only)
Clock Enable Input (Active LOW)
Ground
Power
PI74FCT823/2823T Product Pin Configuration
OE1 1
24 Vcc
D0 2
23 Y0
D1 3
22 Y1
D2 4 24-PIN 21 Y2
D3 5
P24 20 Y3
D4 6
D5 7
D6 8
Q24
R24
S24
19 Y4
18 Y5
17 Y6
D7 9
16 Y7
D8 10
15 Y8
CLR 11
14 EN
GND 12
13 CP
PI74FCT825T Product Pin Configuration
OE1 1
24 Vcc
OE2 2
23 OE3
D0 3
22 Y0
D1 4 24-PIN 21 Y1
D2 5
P24 20 Y2
D3 6
D4 7
D5 8
Q24
R24
S24
19 Y3
18 Y4
17 Y5
D6 9
16 Y6
D7 10
15 Y7
CLR 11
14 EN
GND 12
13 CP
PI74FCT821/823/825/2821/2823T Truth Table(1)
Inputs
Outputs Internal
Function CLR EN OE CP DN YN
QN
High-Z H L H ↑ L Z
L
HLH↑H Z
H
Clear
LXHXX Z
L
LXLXX L
L
Hold
HHHXX Z
NC
H H L X X NC NC
Load
HLH↑L Z
L
HLH↑H Z
H
HLL↑L L
L
HLL↑H H
H
1. H = High Voltage Level
L = Low Voltage Level
X = Don't Care
Z = High Impedance
NC = No Change
↑ = LOW-to-HIGH transition
2
PS2023A 03/11/96
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