54ACTQ543
Quiet Series Octal Registered Transceiver with
TRI-STATE
Outputs
General Description
The ACTQ543 is a non-inverting octal transceiver containing
two sets of D-type registers for temporary storage of data
flowing in either direction. Separate Latch Enable and Out-
put Enable inputs are provided for each register to permit in-
dependent input and output control in either direction of data
flow.
The ACTQ utilizes NSC Quiet Series technology to guaran-
tee quiet output switching and improved dynamic threshold
performance. FACT Quiet Series
TM
features GTO
TM
output
control and undershoot corrector in addition to a split ground
bus for superior performance.
Features
n
Guaranteed simultaneous switching noise level and
dynamic threshold performance
n
8-bit octal latched transceiver
n
Separate controls for data flow in each direction
n
Back-to-back registers for storage
n
Outputs source/sink 24 mA
n
4 kV minimum ESD immunity
Ordering Code
Military
Package
Number
Package Description
54ACTQ543DMQB
J24A
24-Lead Ceramic Dual-In-Line
54ACTQ543FMQB
W24C
24-Lead Cerpack
54ACTQ543LMQB
E28A
24-Lead Ceramic Leadless
Chip Carrier, Type C
Logic Symbols
GTO
TM
is a trademark of National Semiconductor Corporation.
TRI-STATE
is a registered trademark of National Semiconductor Corporation.
FACT
is a registered trademark of Fairchild Semiconductor Corporation.
FACT Quiet Series
TM
is a trademark of Fairchild Semiconductor Corporation.
DS100233-1
IEEE/IEC
DS100233-4
August 1998
54ACTQ543
Quiet
Series
Octal
Registered
T
ransceiver
with
TRI-ST
A
T
E
Outputs
1998 National Semiconductor Corporation
DS100233
www.national.com
Connection Diagrams
Pin Names
Description
OEAB
A-to-B Output Enable Input (Active LOW)
OEBA
B-to-A Output Enable Input (Active LOW)
CEAB
A-to-B Enable Input (Active LOW)
CEBA
B-to-A Enable Input (Active LOW)
LEAB
A-to-B Latch Enable Input (Active LOW)
LEBA
B-to-A Latch Enable Input (Active LOW)
A
0
A
7
A-to-B Data Inputs or
B-to-A TRI-STATE Outputs
B
0
B
7
B-to-A Data Inputs or
A-to-B TRI-STATE Outputs
Functional Description
The ACTQ543 contains two sets of eight D-type latches, with
separate input and output controls for each set. For data flow
from A to B, for example, the A-to-B Enable (CEAB) input
must be LOW in order to enter data from A
0
A
7
or take data
from B
0
B
7
, as indicated in the Data I/O Control Table. With
CEAB LOW, a LOW signal on the A-to-B Latch Enable
(LEAB) input makes the A-to-B latches transparent; a subse-
quent LOW-to-HIGH transition of the LEAB signal puts the A
latches in the storage mode and their outputs no longer
change with the A inputs. With CEAB and OEAB both LOW,
the TRI-STATE B output buffers are active and reflect the
data present at the output of the A latches. Control of data
flow from B to A is similar, but using the CEBA, LEBA and
OEBA inputs.
Data I/O Control Table
Inputs
Latch Status
Output Buffers
CEAB LEAB OEAB
H
X
X
Latched
High Z
X
H
X
Latched
--
L
L
X
Transparent
--
X
X
H
--
High Z
L
X
L
--
Driving
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
A-to-B data flow shown; B-to-A flow control is the same, except using CEBA,
LEBA and OEBA
Pin Assignment for
DIP and Flatpak
DS100233-2
Pin Assignment
for LCC
DS100233-3
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2
Logic Diagram
DS100233-8
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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3
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
)
-0.5V to +7.0V
DC Input Diode Current (I
IK
)
V
I
= -0.5V
-20 mA
V
I
= V
CC
+ 0.5V
+20 mA
DC Input Voltage (V
I
)
-0.5V to V
CC
+ 0.5V
DC Output Diode Current (I
OK
)
V
O
= -0.5V
-20 mA
V
O
= V
CC
+ 0.5V
+20 mA
DC Output Voltage (V
O
)
-0.5V to V
CC
+ 0.5V
DC Output Source
or Sink Current (I
O
)
50 mA
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
50 mA
Storage Temperature (T
STG
)
-65C to +150C
DC Latch-up Source or
Sink Current
300 mA
Junction Temperature (T
J
)
CDIP
175C
Recommended Operating
Conditions
Supply Voltage V
CC
'ACTQ
4.5V to 5.5V
Input Voltage (V
I
)
0V to V
CC
Output Voltage (V
O
)
0V to V
CC
Operating Temperature (T
A
) (Note 2)
54ACTQ
-55C to +125C
Minimum Input Edge Rate
V/
t
'ACTQ 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.
Note 2: All commercial packaging is not recommended for applications re-
quiring greater than 2000 temperature cycles from -40C to +125C.
DC Characteristics for 'ACTQ Family Devices
54ACTQ
Symbol
Parameter
V
CC
T
A
=
Units
Conditions
(V)
-55C to +125C
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 A
Output Voltage
5.5
5.4
(Note 3)
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 A
Output Voltage
5.5
0.1
(Note 3)
V
IN
= V
IL
or V
IH
4.5
0.50
V
I
OL
= 24 mA
5.5
0.50
I
OL
= 24 mA
I
IN
Maximum Input
5.5
1.0
A
V
I
= V
CC
, GND
Leakage Current
I
OZT
Maximum I/O
5.5
10
A
V
(OE) =
V
IL
, V
IH
Leakage Current
V
O
= V
CC
, GND
I
CCT
Maximum I
CC
/Input
5.5
1.6
mA
V
I
= V
CC
- 2.1V
I
OLD
Minimum Dynamic
Output Current
(Note 4)
5.5
mA
V
OLD
= 1.65V Max
I
OHD
5.5
-50
mA
V
OHD
= 3.85V Min
I
CC
Maximum Quiescent
5.5
160.0
A
V
IN
= V
CC
Supply Current
or GND (Note 5)
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4
DC Characteristics for 'ACTQ Family Devices
(Continued)
54ACTQ
Symbol
Parameter
V
CC
T
A
=
Units
Conditions
(V)
-55C to +125C
Guaranteed Limits
V
OLP
Quiet Output
5.0
1.5
V
(Notes 6, 7)
Maximum Dynamic V
OL
V
OLV
Quiet Output
5.0
-1.2
V
(Notes 6, 7)
Minimum Dynamic V
OL
Note 3: Maximum of 8 outputs loaded; thresholds on input associated with output under test.
Note 4: Maximum test duration 2.0 ms, one output loaded at a time.
Note 5: I
CC
for 54ACTQ
@
25C is identical to 74ACTQ
@
25C.
Note 6: Plastic DIP package.
Note 7: Max number of outputs defined as (n). (n-1) Data Inputs are driven 0V to 3V, one output
@
GND.
Note 8: Max number of Data Inputs (n) switching. (n1) Inputs switching 0V to 3V ('ACTQ). Input-under-test switching: 3V to threshold (V
ILD
), 0V to threshold (V
IHD
),
f = 1 MHz.
AC Electrical Characteristics
54ACTQ
Fig.
No.
V
CC
(V)
(Note 9)
T
A
= -55C
Symbol
Parameter
to +125C
Units
C
L
= 50 pF
Min
Max
t
PLH
Propagation Delay
t
PHL
Transparent Mode
5.0
2.0
9.5
ns
Figure 4
A
n
to B
n
or B
n
to A
n
t
PLH
Propagation Delay
Figure 4
t
PHL
LEBA, LEAB
5.0
2.0
11.0
ns
to A
n
, B
n
t
PZH
Output Enable Time
Figure 6
t
PZL
OEBA or OEAB to A
n
or B
n
5.0
1.5
13.0
ns
CEBA or CEAB to A
n
or B
n
t
PHZ
Output Disable Time
Figure 6
t
PLZ
OEBA or OEAB to A
n
or B
n
5.0
1.5
9.0
ns
CEBA or CEAB to A
n
or B
n
Note 9: Voltage Range 5.0 is 5.0V
0.5V
AC Operating Requirements
54ACTQ
Fig.
No.
V
CC
(V)
(Note 10)
T
A
= -55C
Symbol
Parameter
to +125C
Units
C
L
= 50 pF
Guaranteed
Minimum
t
s
Setup Time, HIGH or LOW
5.0
3.0
ns
Figure 7
A
n
or B
n
to LEBA or LEAB
t
h
Hold Time, HIGH or LOW
5.0
1.5
ns
Figure 7
A
n
or B
n
to LEBA or LEAB
t
w
Latch Enable
5.0
4.0
ns
Figure 5
Pulse Width, LOW
Note 10: Voltage Range 5.0 is 5.0V
0.5V
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