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Part Name
Description
74F821 View Datasheet(PDF) - Philips Electronics
Part Name
Description
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74F821
Bus interface registers
Philips Electronics
74F821 Datasheet PDF : 18 Pages
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Philips Semiconductors
Bus interface registers
Product specification
74F821/822/823/824/825/826
AC ELECTRICAL CHARACTERISTICS FOR 74F823
LIMITS
SYMBOL
PARAMETER
TEST
CONDITION
T
amb
= +25
°
C
V
CC
= +5.0V
C
L
= 50pF
R
L
= 500
Ω
MIN TYP MAX
T
amb
= 0
°
C to +70
°
C
V
CC
= +5.0V
±
10%
C
L
= 50pF
R
L
= 500
Ω
MIN
MAX
T
amb
= –40
°
C to +85
°
C
V
CC
= +5.0V
±
10%
C
L
= 50pF
R
L
= 500
Ω
MIN
MAX
f
max
Maximum clock frequency Waveform 1 150 180
140
130
t
PLH
Propagation delay
t
PHL
CP to Qn or Qn
Waveform 1
4.0 6.5 8.5
4.0 6.0 8.5
4.0
3.5
9.5
9.0
4.0
3.5
10.0
9.0
t
PHL
Propagation delay
MR to Qn or Qn
Waveform 2 3.0 5.0 8.0
3.0
8.0
3.0
8.5
t
PZH
t
PZL
t
PHZ
t
PLZ
Output enable time
OEn to Qn or Qn
Output disable time
OEn to Qn or Qn
Waveform 4 2.0 4.5 8.0
2.0
9.0
2.0
11.0
Waveform 5 3.0 5.0 8.0
2.5
9.0
2.5
9.0
Waveform 4 1.5 3.5 6.5
1.5
7.5
1.5
8.5
Waveform 5 1.5 3.5 6.5
1.5
7.5
1.5
8.5
UNIT
ns
ns
ns
ns
ns
AC SETUP REQUIREMENTS FOR 74F823
SYMBOL
PARAMETER
TEST
CONDITION
t
su
(H)
t
su
(L)
t
h
(H
)
t
h
(
L
)
t
w
(H)
t
w
(L)
t
su
(H)
t
su
(L)
t
h
(H
)
t
h
(
L
)
t
w
(L)
t
rec
Setup time, high or low
Dn to CP
Hold time, high or low
Dn to CP
CP Pulse width,
high or low
Setup time, high or low,
CE to CP
Hold time, high or low
CE to CP
MR Pulse width,
low
Recovery time,
MR to CP
Waveform 3
Waveform 3
Waveform 1
Waveform 3
Waveform 3
Waveform 2
Waveform 2
T
amb
= +25
°
C
V
CC
= +5.0V
C
L
= 50pF
R
L
= 500
Ω
MIN TYP MAX
1.0
1.0
2.0
2.0
3.5
3.5
0.0
2.0
0.0
3.0
LIMITS
T
amb
= 0
°
C to +70
°
C
V
CC
= +5.0V
±
10%
C
L
= 50pF
R
L
= 500
Ω
MIN
MAX
1.0
1.0
2.0
2.0
4.0
4.0
0.0
2.0
0.0
3.5
T
amb
= –40
°
C to +85
°
C
V
CC
= +5.0V
±
10%
C
L
= 50pF
R
L
= 500
Ω
MIN
MAX
2.0
1.5
2.5
2.0
4.0
4.0
0.0
2.0
1.5
4.0
UNIT
ns
ns
ns
ns
ns
4.5
4.5
4.5
ns
2.5
2.5
2.5
ns
1996 Jan 05
12
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