74LVC821ADB データシートの表示（PDF） - Philips Electronics
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74LVC821ADB
Philips Electronics
74LVC821ADB Datasheet PDF : 12 Pages
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Philips Semiconductors
10-bit D-type flip-flop with 5-volt tolerant
inputs/outputs; positive-edge trigger (3-State)
Product specification
74LVC821A
PIN DESCRIPTION
PIN NUMBER SYMBOL
1
OE
2, 3, 4, 5, 6,
7, 8, 9, 10, 11
23, 22, 21, 20,
19, 18, 17, 16,
15, 14
12
D0 to D9
Q0 to Q9
GND
13
CP
24
VCC
NAME AND FUNCTION
Output enable input
(active LOW)
Data inputs
3-State flip-flop outputs
Ground (0 V)
Clock input (LOW-to-HIGH,
edge-triggered)
Positive supply voltage
FUNCTION TABLE
OPERATING MODES
Load and read register
INPUTS
OE
CP
Dn
L
↑
l
L
↑
h
Load register and disable outputs
H
↑
l
H
↑
h
Hold
L
H or L
X
H = HIGH voltage level
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH
CP transition
L = LOW voltage level
l = LOW voltage level one set-up time prior to the LOW-to-HIGH
CP transition
Z = high impedance OFF-state
↑ = LOW–to–HIGH clock transition
NC= no change
INTERNAL FLIP-FLOPS
L
H
L
H
NC
PIN CONFIGURATION
LOGIC SYMBOL
OE 1
D0 2
D1 3
D2 4
D3 5
D4 6
D5 7
D6 8
D7 9
D8 10
D9 11
GND 12
24 VCC
23 Q0
22 Q1
21 Q2
20 Q3
19 Q4
18 Q5
17 Q6
16 Q7
15 Q8
14 Q9
13 CP
SA00413
13
CP
2
D0
Q0
23
3
D1
Q1
22
4
D2
Q2
21
5
D3
Q3
20
6
D4
Q4
19
7
D5
Q5
18
8
D6
Q6
17
9
D7
Q7
16
10
D8
Q8
15
11
D9
Q9
14
OE
1
SA00414
OUTPUTS
Q0 to Q9
L
H
Z
Z
NC
1998 Sep 25
3
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