74ACQ544 • 74ACTQ544 Quiet Series Octal Registered Transceiver with 3-STATE Outputs
March 1990
Revised September 2000
74ACQ544 • 74ACTQ544
Quiet Series
Octal Registered Transceiver
with 3-STATE Outputs
General Description
The ACQ/ACTQ544 is an inverting octal transceiver con-
taining two sets of D-type registers for temporary storage of
data flowing in either direction. Separate Latch Enable and
Output Enable inputs are provided for each register to per-
mit independent input and output control in either direction
of data flow. The 544 inverts data in both directions.
The ACQ/ACTQ utilizes Fairchild FACT Quiet Series
technology to guarantee quiet output switching and
improved dynamic threshold performance. FACT Quiet
Series features GTO
output control and undershoot cor-
rector in addition to a split ground bus for superior perfor-
mance.
Features
s
Guaranteed simultaneous switching noise level and
dynamic threshold performance
s
Guaranteed pin-to-pin skew AC performance
s
8-bit inverting octal latched transceiver
s
Separate controls for data flow in each direction
s
Back-to-back registers for storage
s
Outputs source/sink 24 mA
Ordering Code:
Order Number
74ACQ544SC
74ACQ544SPC
74ACTQ544SC
74ACTQ544SPC
Package Number
M24B
N24C
M24B
N24C
Package Description
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
Pin Names
OEAB
OEBA
CEAB
CEBA
LEAB
LEBA
A
0
–A
7
Description
A-to-B Output Enable Input (Active LOW)
B-to-A Output Enable Input (Active LOW)
A-to-B Enable Input (Active LOW)
B-to-A Enable Input (Active LOW)
A-to-B Latch Enable Input (Active LOW)
B-to-A Latch Enable Input (Active LOW)
A-to-B Data Inputs or
B-to-A 3-STATE Outputs
B
0
–B
7
B-to-A Data Inputs or
A-to-B 3-STATE Outputs
FACT, Quiet Series, FACT Quiet Series and GTO are trademarks of Fairchild Semiconductor Corporation.
© 2000 Fairchild Semiconductor Corporation
DS010685
www.fairchildsemi.com
74ACQ544 • 74ACTQ544
Logic Symbols
Functional Description
The ACQ/ACTQ544 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 subsequent 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 3-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.
IEEE/IEC
Data I/O Control Table
Inputs
CEAB
H
X
L
X
L
LEAB
X
H
L
X
X
OEAB
X
X
X
H
L
Latch
Status
Latched
Latched
Transparent
—
—
Output
Buffers
High Z
—
—
High Z
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
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
www.fairchildsemi.com
2
74ACQ544 • 74ACTQ544
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
CC
)
DC Input Diode Current (I
IK
)
V
I
= −
0.5V
V
I
=
V
CC
+
0.5V
DC Input Voltage (V
I
)
DC Output Diode Current (I
OK
)
V
O
= −
0.5V
V
O
=
V
CC
+
0.5V
DC Output Voltage (V
O
)
DC Output Source
or Sink Current (I
O
)
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
Storage Temperature (T
STG
)
DC Latch-up Source or
Sink Current
Junction Temperature (T
J
)
PDIP
140
°
C
−
0.5V to
+
7.0V
−
20 mA
+
20 mA
−
0.5V to V
CC
+
0.5V
−
20 mA
+
20 mA
−
0.5V to V
CC
+
0.5V
±
50 mA
±
50 mA
−
65
°
C to
+
150
°
C
±
300 mA
Recommended Operating
Conditions
Supply Voltage V
CC
ACQ
ACTQ
Input Voltage (V
I
)
Output Voltage (V
O
)
Operating Temperature (T
A
)
Minimum Input Edge Rate
∆
V/
∆
t
ACQ Devices
V
IN
from 30% to 70% of V
CC
V
CC
@3.0V, 4.5V, 5.5V
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, with-
out exception, to ensure that the system design is reliable over its power
supply, temperature, and output/input loading variables. Fairchild does not
recommend operation of FACT circuits outside databook specifications.
2.0V to 6.0V
4.5V to 5.5V
0V to V
CC
0V to V
CC
−
40
°
C to
+
85
°
C
125 mV/ns
DC Electrical Characteristics for ACQ
Symbol
V
IH
Parameter
Minimum HIGH Level
Input Voltage
V
IL
Maximum LOW Level
Input Voltage
V
OH
Minimum HIGH Level
Output Voltage
V
CC
(V)
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
V
OL
Maximum LOW Level
Output Voltage
3.0
4.5
5.5
3.0
4.5
5.5
I
IN
(Note 4)
I
OLD
I
OHD
I
OZT
Maximum Input
Leakage Current
Minimum Dynamic
Output Current (Note 3)
Maximum I/O
Leakage Current
V
OLP
Quiet Output
Maximum Dynamic V
OL
5.5
±0.6
±6.0
µA
5.5
5.5
5.5
8.0
75
−75
80.0
mA
mA
µA
V
OLD
=
1.65V Max
V
OHD
=
3.85V Min
V
IN
=
V
CC
or GND
V
I
(OE)
=
V
IL
, V
IH
V
I
=
V
CC
, GND
V
O
=
V
CC
, GND
5.0
1.1
1.5
V
Figures 1, 2
(Note 5)(Note 6)
5.5
0.002
0.001
0.001
T
A
= +
25°C
Typ
1.5
2.25
2.75
1.5
2.25
2.75
2.99
4.49
5.49
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.56
3.86
4.86
0.1
0.1
0.1
0.36
0.36
0.36
±
0.1
T
A
= −
40°C to
+
85°C
Guaranteed Limits
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
V
IN
=
V
IL
or V
IH
2.46
3.76
4.76
0.1
0.1
0.1
V
IN
=
V
IL
or V
IH
0.44
0.44
0.44
±
1.0
µA
V
I
OL
=
12 mA
I
OL
=
24 mA
I
OL
=
24 mA (Note 2)
V
I
=
V
CC
, GND
V
I
OUT
=
50
µA
V
I
OH
= −
12 mA
I
OH
= −
24 mA
I
OH
= −
24 mA (Note 2)
V
I
OUT
= −
50
µA
V
V
OUT
=
0.1V
or V
CC
−
0.1V
V
Units
Conditions
V
OUT
=
0.1V
or V
CC
−
0.1V
I
CC
(Note 4) Maximum Quiescent Supply Current
3
www.fairchildsemi.com
74ACQ544 • 74ACTQ544
DC Electrical Characteristics for ACQ
Symbol
V
OLV
V
IHD
V
ILD
Parameter
Quiet Output
Minimum Dynamic V
OL
Minimum HIGH Level
Dynamic Input Voltage
Maximum LOW Level
Dynamic Input Voltage
V
CC
(V)
5.0
5.0
5.0
Typ
−0.6
3.1
1.9
(Continued)
T
A
= −
40°C to
+
85°C
Guaranteed Limits
−1.2
3.5
1.5
V
V
V
Figures 1, 2
(Note 5)(Note 6)
(Note 5)(Note 7)
(Note 5)(Note 7)
T
A
= +
25°C
Units
Conditions
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
.
Note 5:
DIP package.
Note 6:
Max number of outputs defined as (n). Data Inputs are driven 0V to 5V. One output @ GND.
Note 7:
Max number of Data Inputs (n) switching. (n-1) inputs switching 0V to 5V (ACQ). Input-under-test switching: 5V to threshold (V
ILD
),
0V to threshold (V
IHD
). f
=
1 MHz.
DC Electrical Characteristics for ACTQ
Symbol
V
IH
V
IL
V
OH
Parameter
Minimum HIGH Level
Input Voltage
Maximum LOW Level
Input Voltage
Minimum HIGH Level
Output Voltage
V
CC
(V)
4.5
5.5
4.5
5.5
4.5
5.5
4.5
5.5
V
OL
Maximum LOW Level
Output Voltage
4.5
5.5
4.5
5.5
I
IN
I
OZT
I
CCT
I
OLD
I
OHD
I
CC
V
OLP
V
OLV
V
IHD
V
ILD
Maximum Input Leakage Current
Maximum I/O
Leakage Current
Maximum I
CC
/Input
Minimum Dynamic
Output Current (Note 9)
Maximum Quiescent or GND
Quiet Output
Maximum Dynamic V
OL
Quiet Output
Minimum Dynamic V
OL
Maximum HIGH Level
Dynamic Input Voltage
Maximum LOW Level
Dynamic Input Voltage
5.5
5.5
5.5
5.5
5.5
5.5
5.0
5.0
5.0
5.0
1.1
−0.6
1.9
1.2
8.0
1.5
−1.2
2.2
0.8
0.6
0.001
0.001
T
A
= +25°C
Typ
1.5
1.5
1.5
1.5
4.49
5.49
2.0
2.0
0.8
0.8
4.4
5.4
3.86
4.86
0.1
0.1
0.36
0.36
±
0.1
±0.6
T
A
= −40°C
to
+85°C
Guaranteed Limits
2.0
2.0
0.8
0.8
4.4
5.4
3.76
4.76
0.1
0.1
0.44
0.44
±
1.0
±6.0
1.5
75
−75
80.0
µA
µA
mA
mA
mA
µA
V
V
V
V
V
Units
V
V
V
Conditions
V
OUT
=
0.1V
or V
CC
−
0.1V
V
OUT
=
0.1V
or V
CC
−
0.1V
I
OUT
= −
50
µA
V
IN
=
V
IL
or V
IH
V
I
OH
= −
24 mA
I
OH
= −
24 mA (Note 8)
I
OUT
=
50
µA
V
IN
=
V
IL
or V
IH
V
I
OL
=
24 mA
I
OL
=
24 mA (Note 8)
V
I
=
V
CC
, GND
V
I
, (OE)
=
V
IL
, V
IH
V
O
=
V
CC
, GND
V
I
=
V
CC
−
2.1V
V
OLD
=
1.65V Max
V
OHD
=
3.85V Min
V
IN
=
V
CC
Figure 1, Figure 2
(Note 10)(Note 11)
Figure 1, Figure 2
(Note 10)(Note 11)
(Note 10)(Note 12)
(Note 10)(Note 12)
Note 8:
All outputs loaded; thresholds on input associated with output under test.
Note 9:
Maximum test duration 2.0 ms, one output loaded at a time.
Note 10:
DIP package.
Note 11:
Max number of outputs defined as (n-1). Data Inputs are driven 0V to 3V, one output @ GND.
Note 12:
Max number of Data Inputs (n) switching (n-1) inputs switching 0V to 3V (ACTQ). Input-under-test switching:
3V to threshold (V
ILD
), 0V to threshold (V
IHD
), f
=
1 MHz.
www.fairchildsemi.com
4
74ACQ544 • 74ACTQ544
AC Electrical Characteristics for ACQ
V
CC
Symbol
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
OSHL
t
OSLH
Parameter
Propagation Delay
Transparent Mode
A
n
to B
n
or B
n
to A
n
Propagation Delay
LEBA, LEAB to A
n
, B
n
Output Enable Time
OEBA or OEAB to A
n
or B
n
CEBA or CEAB to A
n
or B
n
Output Disable Time
OEBA or OEAB to A
n
or B
n
CEBA or CEAB to A
n
or B
n
Output to Output
Skew (Note 14)
3.3
5.0
1.0
0.5
1.5
1.0
1.5
1.0
ns
3.3
5.0
1.0
1.0
7.5
5.0
10.5
7.0
1.0
1.0
11.0
7.5
ns
3.3
5.0
3.3
5.0
1.5
1.5
1.5
1.5
8.5
6.0
10.0
7.0
12.0
8.0
14.0
9.5
1.5
1.5
1.5
1.5
12.5
8.5
15.0
10.0
ns
ns
(V)
(Note 13)
3.3
5.0
Min
1.5
1.5
T
A
= +25°C
C
L
=
50 pF
Typ
8.0
5.0
Max
11.0
7.5
T
A
= −
40°C to
+
85°C
C
L
=
50 pF
Min
1.5
1.5
Max
12.0
8.0
ns
Units
Note 13:
Voltage Range 5.0 is 5.0V
±
0.5V
Voltage Range 3.3 is 3.3V
±
0.3V
Note 14:
Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs within the same packaged device.
The specification applies to any outputs switching in the same direction, either HIGH-to-LOW (t
OSHL
) or LOW-to-HIGH (t
OSLH
). Parameter guaranteed by
design. Not tested.
AC Operating Requirements for ACQ
V
CC
Symbol
t
S
t
H
t
W
Parameter
Setup Time, HIGH or LOW
A
n
or B
n
to LEBA or LEAB
Hold Time, HIGH or LOW
A
n
or B
n
to LEBA or LEAB
Latch Enable, B to A
Pulse Width, LOW
Note 15:
Voltage Range 5.0 is 5.0V
±
0.5V
Voltage Range 3.3 is 3.0V
±
0.3V
T
A
= +25°C
C
L
=
50 pF
Typ
3.0
1.5
4.0
T
A
= −
40°C to
+
85°C
C
L
=
50 pF
Guaranteed Minimum
3.0
1.5
4.0
ns
ns
ns
Units
(V)
(Note 15)
3.3
5.0
3.3
5.0
3.3
5.0
5
www.fairchildsemi.com
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
