74ACQ241 Octal Buffer/Line Driver with 3-STATE Outputs
March 2007
74ACQ241
Octal Buffer/Line Driver with 3-STATE Outputs
Features
■
I
CC
and I
OZ
reduced by 50%
■
Guaranteed simultaneous switching noise level and
■
■
■
■
■
tm
General Description
The ACQ241 is an 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 utilizes Fairchild
FACT Quiet Series™ technology to guarantee quiet out-
put switching and improved dynamic threshold perfor-
mance. FACT Quiet Series features GTO™ output
control and undershoot corrector in addition to a split
ground bus for superior performance.
dynamic threshold performance
Guaranteed pin-to-pin skew AC performance
Improved latch-up immunity
3-STATE outputs drive bus lines or buffer memory
address registers
Outputs source/sink 24mA
Faster prop delays than the standard AC
Ordering Information
Order Number
74ACQ241SC
Package
Number
M20B
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.
Connection Diagram
Pin Descriptions
Pin Names
OE
1
, OE
2
I
0
–I
7
O
0
–O
7
Inputs
Outputs
Description
3-STATE Output Enable Inputs
FACT™, FACT Quiet Series™, and GTO™ are trademarks of Fairchild Semiconductor Corporation.
©1990 Fairchild Semiconductor Corporation
74ACQ241 Rev. 1.3
www.fairchildsemi.com
74ACQ241 Octal Buffer/Line Driver with 3-STATE Outputs
Logic Symbol
IEEE/IEC
Truth Table
Inputs
OE
1
L
L
H
I
n
L
H
X
Outputs
(Pins 12, 14, 16, 18)
L
H
Z
Inputs
OE
2
H
H
H
I
n
L
H
X
Outputs
(Pins 3, 5, 7, 9)
L
H
Z
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Z
=
High Impedance
©1990 Fairchild Semiconductor Corporation
74ACQ241 Rev. 1.3
www.fairchildsemi.com
2
74ACQ241 Octal Buffer/Line Driver with 3-STATE Outputs
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
V
CC
I
IK
Supply Voltage
DC Input Diode Current
V
I
=
–0.5V
V
I
=
V
CC
+ 0.5V
V
I
I
OK
DC Input Voltage
DC Output Diode Current
V
O
=
–0.5V
V
O
=
V
CC
+ 0.5V
V
O
I
O
DC Output Voltage
Parameter
Rating
–0.5V to +7.0V
–20mA
+20mA
–0.5V to V
CC
+ 0.5V
–20mA
+20mA
–0.5V to V
CC
+ 0.5V
±50mA
±50mA
–65°C to +150°C
±300mA
140°C
DC Output Source or Sink Current
I
CC
or I
GND
DC V
CC
or Ground Current per Output Pin
T
STG
Storage Temperature
DC Latch-Up Source or Sink Current
T
J
Junction Temperature
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to absolute maximum ratings.
Symbol
V
CC
V
I
V
O
T
A
∆
V /
∆
t
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature
Minimum Input Edge Rate
Parameter
Rating
2.0V to 6.0V
0V to V
CC
0V to V
CC
–40°C to +85°C
125mV/ns
V
IN
from 30% to 70% of V
CC
, V
CC
@ 3.0V, 4.5V, 5.5V
©1990 Fairchild Semiconductor Corporation
74ACQ241 Rev. 1.3
www.fairchildsemi.com
3
74ACQ241 Octal Buffer/Line Driver with 3-STATE Outputs
DC Electrical Characteristics
T
A
=
+25°C
Symbol
V
IH
T
A
=
–40°C to +85°C
Units
V
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
V
2.46
3.76
4.76
0.1
0.1
0.1
V
0.44
0.44
0.44
± 1.0
75
–75
µA
mA
mA
µA
µA
V
V
V
Parameter
Minimum High Level
Input Voltage
V
CC
(V)
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
Conditions
V
OUT
=
0.1V
or V
CC
– 0.1V
V
OUT
=
0.1V or
V
CC
– 0.1V
I
OUT
=
–50µA
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
0.002
0.001
0.001
0.1
0.1
0.1
0.36
0.36
0.36
Guaranteed Limits
V
IL
Maximum Low Level
Input Voltage
V
OH
Minimum High Level
Output Voltage
V
IN
=
V
IL
or V
IH
:
3.0
4.5
5.5
V
OL
Maximum Low Level
Output Voltage
3.0
4.5
5.5
V
IN
=
V
IL
or V
IH
:
3.0
4.5
5.5
I
IN(3)
I
OLD
I
OHD
I
CC
(3)
I
OH
=
–12mA
I
OH
=
–24mA
I
OH
=
–24mA
(1)
I
OUT
=
50µA
I
OL
=
12mA
I
OL
= 24mA
I
OL
=
24mA
(1)
V
I
=
V
CC
, GND
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
Figures 1 & 2
(4)
Figures 1 & 2
(4)
(5)
Maximum Input
Leakage Current
Minimum Dynamic
Output Current
(2)
Maximum Quiescent
Supply Current
Maximum 3-STATE
Leakage Current
Quiet Output Maximum
Dynamic V
OL
Quiet Output Minimum
Dynamic V
OL
Minimum High Level
Dynamic Input Voltage
Maximum Low Level
Dynamic Input Voltage
5.5
5.5
5.5
5.5
5.5
± 0.1
4.0
± 0.25
40.0
± 2.5
I
OZ
V
OLP
V
OLV
V
IHD
V
ILD
5.0
5.0
5.0
5.0
1.1
–0.6
3.1
1.9
1.5
–1.2
3.5
1.5
V
V
V
V
(5)
Notes:
1. All outputs loaded; thresholds on input associated with output under test.
2. Maximum test duration 2.0ms, one output loaded at a time.
3. I
IN
and I
CC
@ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V V
CC
.
4. Max number of outputs defined as (n). Data Inputs are driven 0V to 5V. One output @ GND.
5. Max number of Data Inputs (n) switching. n–1 Inputs switching 0V to 5V. Input-under-test switching: 5V to threshold
(V
ILD
), 0V to threshold (V
IHD
), f
=
1 MHz.
©1990 Fairchild Semiconductor Corporation
74ACQ241 Rev. 1.3
www.fairchildsemi.com
4
74ACQ241 Octal Buffer/Line Driver with 3-STATE Outputs
AC Electrical Characteristics
T
A
=
+25°C,
C
L
=
50pF
Symbol
t
PHL
, t
PLH
t
PZL
, t
PZH
t
PHZ
, t
PLZ
t
OSHL
, t
OSLH
T
A
=
–40°C to +85°C,
C
L
=
50pF
Min.
2.0
1.5
2.5
1.5
1.0
1.0
Parameter
Propagation Delay,
Data to Output
Output Enable Time
Output Disable Time
Output to Output Skew
Data to Output
(7)
V
CC
(V)
(6)
3.3
5.0
3.3
5.0
3.3
5.0
3.3
Min.
2.0
1.5
2.5
1.5
1.0
1.0
Typ.
6.5
4.5
8.0
5.5
8.5
5.5
1.0
Max.
9.0
6.0
13.0
8.5
14.5
9.5
1.5
Max.
9.5
6.5
13.5
9.0
15.0
10.0
1.5
Units
ns
ns
ns
ns
Notes:
6. Voltage range 5.0 is 5.0V ± 0.5V. Voltage range 3.3 is 3.3V ± 0.3V.
7. 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
Symbol
C
IN
C
PD
Parameter
Input Capacitance
Power Dissipation Capacitance
Conditions
V
CC
=
OPEN
V
CC
=
5.0V
Typ.
4.5
70
Units
pF
pF
©1990 Fairchild Semiconductor Corporation
74ACQ241 Rev. 1.3
www.fairchildsemi.com
5
