54AC821.pdf
(
163 KB
)
Pobierz
August 1998
54AC821
•
54ACT821
10-Bit D Flip-Flop with TRI-STATE
®
Outputs
General Description
The ’AC/’ACT821 is a 10-bit D flip-flop with TRI-STATE out-
puts arranged in a broadside pinout.
The ’AC/’ACT821 is functionally identical to the AM29821.
n
Noninverting outputs
n
Outputs source/sink 24 mA
n
’ACT821 has TTL-compatible inputs
n
Standard Microcircuit Drawing (SMD)
— ’ACT821: 5962-88705
— ’AC821: 5962-91606
Features
n
TRI-STATE outputs for bus interfacing
Logic Symbols
Connection Diagrams
Pin Assignment
for DIP and Flatpak
DS100355-1
IEEE/IEC
DS100355-3
Pin Assignment for LCC
DS100355-2
Pin Names
Description
D
0
–D
9
Data Inputs
O
0
–
O
9
Data Outputs
OE
Output Enable Input
CP
Clock Input
DS100355-4
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
FACT
®
is a registered trademark of Fairchild Semiconductor Corporation.
www.national.com
© 1998 National Semiconductor Corporation
DS100355
Functional Description
The ’AC/’ACT821 consists of ten D-type edge-triggered
flip-flo
ps.
The buffered Clock (CP) and buffered Output En-
able (OE) are common to all flip-flops. The flip-flops will store
the state of their individual D inputs that meet the setup and
hold t
ime
requirements on the LOW-to-HIGH CP transition.
With OE LOW the contents of the flip-flops are available at
the outputs. When OE is HIGH t
he o
utputs go to the high im-
pedance state. Operation of the OE input does not affect the
state of the flip-flops.
The ’AC/’ACT821 is functionally and pin compatible with the
AM29821.
Function Table
Inputs
Internal
Outputs
Function
OE
CP
D
Q
O
H
N
L
L
Z
High Z
H
N
H
H
Z
High Z
L
N
L
L
L
Load
L
N
H
H
H
Load
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
Z
=
HIGH Impedance
N
=
LOW-to-HIGH Clock Transition
Logic Diagram
DS100355-5
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
www.national.com
2
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC
)
Recommended Operating
Conditions
Supply Voltage (V
CC
)
’AC
2.0V to 6.0V
−0.5V to +7.0V
’ACT
4.5V to 5.5V
DC Input Diode Current (I
IK
)
V
I
=
−0.5V
Input Voltage (V
I
)
0VtoV
CC
−20 mA
Output Voltage (V
O
)
0VtoV
CC
V
I
=
V
CC
+ 0.5V
+20 mA
Operating Temperature (T
A
)
54AC/ACT
DC Input Voltage (V
I
)
−0.5V to V
CC
+ 0.5V
−55˚C to +125˚C
DC Output Diode Current (I
OK
)
V
O
=
−0.5V
Minimum Input Edge Rate (
D
V/
D
t)
−20 mA
’AC Devices
V
IN
from 30% to 70% of V
CC
V
CC
@
3.3V, 4.5V, 5.5V
V
O
=
V
CC
+ 0.5V
+20 mA
DC Output Voltage (V
O
)
−0.5V to V
CC
+ 0.5V
125 mV/ns
DC Output Source
or Sink Current (I
O
)
Minimum Input Edge Rate (
D
V/
D
t)
±
50 mA
’ACT Devices
V
IN
from 0.8V to 2.0V
V
CC
@
4.5V, 5.5V 125 mV/ns
Note 1:
Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, without
exception, to ensure that the system design is reliable over its power supply,
temperature, and output/input loading variables. National does not recom-
mend operation of FACT
®
circuits outside databook specifications.
DC Characteristics for ’AC Family Devices
54AC
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
±
50 mA
Storage Temperature (T
STG
)
−65˚C to +150˚C
Junction Temperature (T
J
)
CDIP
175˚C
T
A
=
−55˚C to +125˚C
Symbol
Parameter
V
CC
(V)
Units
Conditions
Guaranteed Limits
V
OUT
=
0.1V
V
IH
Minimum High Level
3.0
2.1
Input Voltage
4.5
3.15
V
or V
CC
− 0.1V
5.5
3.85
V
OUT
=
0.1V
V
IL
Maximum Low Level
3.0
0.9
Input Voltage
4.5
1.35
V
or V
CC
− 0.1V
5.5
1.65
I
OUT
=
−50 µA
V
OH
Minimum High Level
3.0
2.9
Output Voltage
4.5
4.4
V
5.5
5.4
(Note 2)
V
IN
=
V
IL
or V
IH
I
OH
=
−12 mA
3.0
2.4
I
OH
=
−24 mA
4.5
3.7
V
I
OH
=
−24 mA
5.5
4.7
I
OUT
=
50 µA
V
OL
Maximum Low Level
3.0
0.1
Output Voltage
4.5
0.1
V
5.5
0.1
(Note 2)
V
IN
= V
IL
or V
IH
3.0
0.50
I
OL
= 12 mA
4.5
0.50
V
I
OL
= 24 mA
5.5
0.50
I
OL
= 24 mA
±
1.0
I
IN
Maximum Input
5.5
µA
V
I
= V
CC
, GND
Leakage Current
I
OZ
Maximum TRI-STATE
V
I
(OE) = V
IL
,V
IH
±
10.0
Current
5.5
µA
V
I
= V
CC
, GND
V
O
= V
CC
, GND
3
www.national.com
DC Characteristics for ’AC Family Devices
(Continued)
54AC
T
A
=
−55˚C to +125˚C
Symbol
Parameter
V
CC
(V)
Units
Conditions
Guaranteed Limits
V
OLD
=
1.65V Max
I
OLD
(Note 3)
5.5
50
mA
Minimum Dynamic
V
OHD
=
3.85V Min
I
OHD
Output Current
5.5
−50
mA
V
IN
=
V
CC
I
CC
Maximum Quiescent
5.5
160.0
µA
Supply Current
or GND
Note 2:
All outputs loaded; thresholds on input associated with output under test.
Note 3:
Maximum test duration 2.0 ms, one output loaded at a time.
Note 4:
I
IN
and I
CC
@
3.0V are guaranteed to be less than or equal to the respective limit
@
5.5V V
CC
.
I
CC
for 54AC
@
25˚C is identical to 74AC
@
25˚C.
DC Characteristics for ’ACT Family Devices
54ACT
T
A
=
−55˚C to +125˚C
Symbol
Parameter
V
CC
Units
Conditions
(V)
Guaranteed Limits
V
IH
Minimum High Level
4.5
2.0
V
V
OUT
= 0.1V
Input Voltage
5.5
2.0
or V
CC
− 0.1V
V
IL
Maximum Low Level
4.5
0.8
V
V
OUT
= 0.1V
Input Voltage
5.5
0.8
or V
CC
− 0.1V
V
OH
Minimum High Level
4.5
4.4
V
I
OUT
= −50 µA
Output Voltage
5.5
5.4
(Note 5)
V
IN
= V
IL
or V
IH
4.5
3.70
V
I
OH
= −24 mA
5.5
4.70
I
OH
= −24 mA
V
OL
Maximum Low Level
4.5
0.1
V
I
OUT
= 50 µA
Output Voltage
5.5
0.1
(Note 5)
V
IN
=
V
IL
or V
IH
I
OL
=
24 mA
4.5
0.50
V
I
OL
=
24 mA
5.5
0.50
±
1.0
V
I
=
V
CC
, GND
I
IN
Maximum Input
5.5
µA
Leakage Current
±
10.0
V
I
=
V
IL
,V
IH
I
OZ
Maximum TRI-STATE
5.5
µA
V
O
=
V
CC
, GND
Current
V
I
=
V
CC
− 2.1V
I
CCT
Maximum
5.5
1.6
mA
I
CC
/Input
V
OLD
=
1.65V Max
I
OLD
(Note 6)
5.5
50
mA
Minimum Dynamic
V
OHD
=
3.85V Min
I
OHD
Output Current
5.5
−50
mA
V
IN
=
V
CC
I
CC
Maximum Quiescent
5.5
160.0
µA
Supply Current
or GND
Note 5:
All outputs loaded; thresholds on input associated with output under test.
Note 6:
Maximum test duration 2.0 ms, one output loaded at a time.
Note 7:
I
CC
for 54ACT
@
25˚C is identical to 74ACT
@
25˚C.
www.national.com
4
AC Electrical Characteristics
54AC
T
A
=
−55˚C to +125˚C
Symbol
Parameter
V
CC
Units
Fig.
C
L
=
50 pF
(V)
No.
(Note 8)
Min
Max
f
max
Maximum Clock
3.3
95
MHz
Frequency
5.0
100
t
PLH
Propagation Delay
3.3
1.0
13.0
ns
CP to O
n
5.0
1.5
9.5
t
PHL
Propagation Delay
3.3
1.0
13.0
ns
CP to O
n
5.0
1.5
9.5
t
PZH
Ou
tput Enable Time
3.3
1.0
13.0
ns
OE to O
n
5.0
1.5
9.5
t
PZL
Ou
tput Enable Time
3.3
1.0
13.0
ns
OE to O
n
5.0
1.5
9.5
t
PHZ
Ou
tput Disable Time
3.3
1.0
12.0
ns
OE to O
n
5.0
1.5
10.0
t
PLZ
Ou
tput Disable Time
3.3
1.0
12.0
ns
OE to O
n
5.0
1.5
10.0
Note 8:
Voltage Range 3.3 is 3.3V
±
0.3V
Note 9:
Voltage Range 5.0 is 5.0V
±
0.5V
AC Operating Requirements
54AC
V
CC
T
A
= −55˚C to +125˚C
Fig.
Symbol
Parameter
Units
(V)
C
L
= 50 pF
No.
(Note 10)
Guaranteed Minimum
t
s
Setup Time, HIGH or LOW
3.3
3.0
ns
D
n
to CP
5.0
3.0
t
h
Hold Time, HIGH or LOW
3.3
3.0
ns
D
n
to CP
5.0
3.0
t
w
CP Pulse Width
3.3
6.0
ns
HIGH or LOW
5.0
5.0
Note 10:
Voltage Range 3.3 is 3.3V
±
0.3V
Note 11:
Voltage Range 5.0 is 5.0V
±
0.5V
AC Electrical Characteristics
54ACT
T
A
=
−55˚C
V
CC
Fig.
Symbol
Parameter
(V)
to +125˚C
Units
No.
C
L
=
50 pF
(Note 12)
Min
Max
f
max
Maximum Clock
5.0
85
MHz
Frequency
t
PLH
Propagation Delay
5.0
1.5
11.5
ns
CP to O
n
t
PHL
Propagation Delay
5.0
1.5
11.5
ns
CP to O
n
t
PZH
Ou
tput Enable Time
5.0
1.5
12.5
ns
OE to O
n
5
www.national.com
Plik z chomika:
kojczuch
Inne pliki z tego folderu:
ADC10461.pdf
(333 KB)
ADC10462.pdf
(333 KB)
100301.pdf
(105 KB)
100302.pdf
(106 KB)
100304.pdf
(109 KB)
Inne foldery tego chomika:
ADC
ANALOG
AUDIO
Bt
CCD
Zgłoś jeśli
naruszono regulamin