© 1999 Fairchild Semiconductor Corporation
DS010234
www.fairchildsemi.com
July 1989
Revised November 1999
7
4
AC
Q240 • 74AC
T
Q
2
4
0
Qui
e
t Seri
es
O
c
ta
l
Buff
er/
L
in
e Dr
iver
w
ith
3-ST
A
T
E O
u
tputs
74ACQ240 • 74ACTQ240
Quiet Series
Octal Buffer/Line Driver
with 3-STATE Outputs
General Description
The ACQ/ACTQ240 is an inverting octal buffer and line
driver designed to be employed as a memory address
driver, clock driver and bus oriented transmitter or receiver
which provides improved PC board density. The ACQ/
ACTQ utilizes Fairchild’s Quiet Series
technology to
guarantee quiet output switching and improve dynamic
threshold performance. FACT Quiet Series
features
GTO
output control and undershoot corrector in addition
to a split ground bus for superior performance.
Features
s
I
CC
and I
OZ
reduced by 50%
s
Guaranteed simultaneous switching noise level and
dynamic threshold performance
s
Guaranteed pin-to-pin skew AC performance
s
Improved latch-up immunity
s
Inverting 3-STATE outputs drive bus lines or buffer
memory address registers
s
Outputs source/sink 24 mA
s
Faster prop delays than the standard ACT240
Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
FACT
, Quiet Series
, FACT Quiet Series
, and GTO
are trademarks of Fairchild Semiconductor Corporation.
Order Number
Package Number
Package Description
74ACQ240SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC)JEDEC MS-013, 0.300” Wide Body
74ACQ240SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ACQ240PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
74ACTQ240SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC)JEDEC MS-013, 0.300” Wide Body
74ACTQ240SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ACTQ240QSC
MQA20
20-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150” Wide
Pin Names
Description
OE
1
, OE
2
3-STATE Output Enable Inputs
I
0
–I
7
Inputs
O
0
–O
7
Outputs
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2
74
A
C
Q240
• 7
4
AC
T
Q
240
Logic Symbol
IEEE/IEC
Truth Tables
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Z
=
High Impedance
Inputs
Outputs
OE
1
I
n
(Pins 12, 14, 16, 18)
L
L
H
L
H
L
H
X
Z
Inputs
Outputs
OE
2
I
n
(Pins 3, 5, 7, 9)
L
L
H
L
H
L
H
X
Z
3
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7
4
AC
Q240
• 74AC
T
Q
2
4
0
Absolute Maximum Ratings
(Note 1)
Recommended Operating
Conditions
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.
DC Electrical Characteristics for ACQ
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
)
−
65
°
C to
+
150
°
C
DC Latch-Up Source or
Sink Current
±
300 mA
Junction Temperature (T
J
)
PDIP
140
°
C
Supply Voltage (V
CC
)
ACQ
2.0V to 6.0V
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
)
−
40
°
C to
+
85
°
C
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
125 mV/ns
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
Symbol
Parameter
V
CC
T
A
=
+
25
°
C T
A
=
−
40
°
C to
+
85
°
C
Units
Conditions
(V)
Typ
Guaranteed Limits
V
IH
Minimum HIGH Level
3.0
1.5
2.1
2.1
V
OUT
=
0.1V
Input Voltage
4.5
2.25
3.15
3.15
V
or V
CC
−
0.1V
5.5
2.75
3.85
3.85
V
IL
Maximum LOW Level
3.0
1.5
0.9
0.9
V
OUT
=
0.1V
Input Voltage
4.5
2.25
1.35
1.35
V
or V
CC
−
0.1V
5.5
2.75
1.65
1.65
V
OH
Minimum HIGH Level
3.0
2.99
2.9
2.9
Output Voltage
4.5
4.49
4.4
4.4
V
I
OUT
=
−
50
µ
A
5.5
5.49
5.4
5.4
V
IN
=
V
IL
or V
IH
3.0
2.56
2.46
I
OH
=
−
12 mA
4.5
3.86
3.76
V
I
OH
=
−
24 mA
5.5
4.86
4.76
I
OH
=
−
24 mA (Note 2)
V
OL
Maximum LOW Level
3.0
0.002
0.1
0.1
Output Voltage
4.5
0.001
0.1
0.1
V
I
OUT
=
50
µ
A
5.5
0.001
0.1
0.1
V
IN
=
V
IL
or V
IH
3.0
0.36
0.44
I
OL
=
12 mA
4.5
0.36
0.44
V
I
OL
=
24 mA
5.5
0.36
0.44
I
OL
=
24 mA (Note 2)
I
IN
Maximum Input
5.5
±
0.1
±
1.0
µ
A
V
I
=
V
CC
, GND
(Note 4)
Leakage Current
I
OLD
Minimum Dynamic
5.5
75
mA
V
OLD
=
1.65V Max
I
OHD
Output Current (Note 3)
5.5
−
75
mA
V
OHD
=
3.85V Min
I
CC
Maximum Quiescent
5.5
4.0
40.0
µ
A
V
IN
=
V
CC
or GND
(Note 4)
Supply Current
I
OZ
Maximum 3-STATE
5.5
±
0.25
±
2.5
µ
A
V
I
(OE)
=
V
IL
, V
IH
Leakage Current
V
I
=
V
CC
, GND
V
O
=
V
CC
, GND
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4
74
A
C
Q240
• 7
4
AC
T
Q
240
DC Electrical Characteristics for ACQ
(Continued)
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: Plastic 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
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: Plastic DIP package.
Note 11: Max number of Data Inputs defined as (n). n
−
1 Data Inputs are driven 0V to 3V. One Data Input @ V
IN
=
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.
Symbol
Parameter
V
CC
T
A
=
+
25
°
C T
A
=
−
40
°
C to
+
85
°
C
Units
Conditions
(V)
Typ
Guaranteed Limits
V
OLP
Quiet Output
5.0
1.1
1.5
V
Figure 1, Figure 2
Maximum Dynamic V
OL
(Note 5)(Note 6)
V
OLV
Quiet Output
5.0
−
0.6
−
1.2
V
Figure 1, Figure 2
Minimum Dynamic V
OL
(Note 5)(Note 6)
V
IHD
Minimum HIGH Level Dynamic Input Voltage
5.0
3.1
3.5
V
(Note 5)(Note 7)
V
ILD
Maximum LOW Level Dynamic Input Voltage
5.0
1.9
1.5
V
(Note 5)(Note 7)
Symbol
Parameter
V
CC
T
A
=
+
25
°
C T
A
=
−
40
°
C to
+
85
°
C
Units
Conditions
(V)
Typ
Guaranteed Limits
V
IH
Minimum HIGH Level
4.5
1.5
2.0
2.0
V
V
OUT
=
0.1V
Input Voltage
5.5
1.5
2.0
2.0
or V
CC
−
0.1V
V
IL
Maximum LOW Level
4.5
1.5
0.8
0.8
V
V
OUT
=
0.1V
Input Voltage
5.5
1.5
0.8
0.8
or V
CC
−
0.1V
V
OH
Minimum HIGH Level
4.5
4.49
4.4
4.4
V
I
OUT
=
−
50
µ
A
Output Voltage
5.5
5.49
5.4
5.4
V
IN
=
V
IL
or V
IH
4.5
3.86
3.76
V
I
OH
=
−
24 mA
5.5
4.86
4.76
I
OH
=
−
24 mA (Note 8)
V
OL
Maximum LOW Level
4.5
0.001
0.1
0.1
V
I
OUT
=
50
µ
A
Output Voltage
5.5
0.001
0.1
0.1
V
IN
=
V
IL
or V
IH
4.5
0.36
0.44
V
I
OL
=
24 mA
5.5
0.36
0.44
I
OL
=
24 mA (Note 8)
I
IN
Maximum Input Leakage Current
5.5
±
0.1
±
1.0
µ
A
V
I
=
V
CC
, GND
I
OZ
Maximum 3-STATE
5.5
±
0.25
±
2.5
µ
A
V
I
=
V
IL
, V
IH
Leakage Current
V
O
=
V
CC
, GND
I
CCT
Maximum I
CC
/Input
5.5
0.6
1.5
mA
V
I
=
V
CC
−
2.1V
I
OLD
Minimum Dynamic
5.5
75
mA
V
OLD
=
1.65V Max
I
OHD
Output Current (Note 9)
5.5
−
75
mA
V
OHD
=
3.85V Min
I
CC
Maximum Quiescent Supply Current
5.5
4.0
40.0
µ
A
V
IN
=
V
CC
or GND
V
OLP
Quiet Output Maximum
5.0
1.1
1.5
V
Figure 1, Figure 2
Dynamic V
OL
(Note 10)(Note 11)
V
OLV
Quiet Output Minimum
5.0
−
0.6
−
1.2
V
Figure 1, Figure 2
Dynamic V
OL
(Note 10)(Note 11)
V
IHD
Minimum HIGH Level Dynamic Input Voltage
5.0
1.9
2.2
V
(Note 10)(Note 12)
V
ILD
Maximum LOW Level Dynamic Input Voltage
5.0
1.2
0.8
V
(Note 10)(Note 12)
5
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7
4
AC
Q240
• 74AC
T
Q
2
4
0
AC Electrical Characteristics for ACQ
Note 13: Voltage Range 5.0 is 5.0V
±
0.5V
Voltage Range 3.3 is 3.3
±
0.3V.
Note 14: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same 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.
AC Electrical Characteristics for ACTQ
Note 15: Voltage Range 5.0 is 5.0V
±
0.5V
Note 16: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same 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.
Capacitance
V
CC
T
A
=
+
25
°
C
T
A
=
−
40
°
C to
+
85
°
C
Symbol
Parameter
(V)
C
L
=
50 pF
C
L
=
50 pF
Units
(Note 13)
Min
Typ
Max
Min
Max
t
PHL
Propagation Delay
3.3
2.0
7.0
10.0
2.0
10.5
ns
t
PLH
Data to Output
5.0
1.5
5.0
6.5
1.5
7.0
t
PZL
Output Enable Time
3.3
2.5
8.0
12.0
2.5
12.5
ns
t
PZH
5.0
1.5
5.5
8.0
1.5
8.5
t
PHZ
Output Disable Time
3.3
1.0
8.5
13.5
1.0
14.0
ns
t
PLZ
5.0
1.0
6.0
9.0
1.0
9.5
t
OSHL