74ACQ244, 74ACTQ244 Quiet Series™ Octal Buffer/Line Driver with 3-STATE Outputs
March 2007
74ACQ244, 74ACTQ244
Quiet Series™ 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 ACQ/ACTQ244 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/
ACTQ utilizes Fairchild Quiet Series™ technology to
guarantee quiet output switching and improved dynamic
threshold performance. FACT Quiet Series™ features
GTO™ output control and undershoot corrector in addi-
tion 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/ACT244
Ordering Information
Order Number
74ACQ244SC
74ACQ244SJ
74ACTQ244SC
74ACTQ244SJ
74ACTQ244QSC
74ACTQ244MSA
Package
Number
M20B
M20D
M20B
M20D
MQA20
MSA20
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
Body
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
Body
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150” Wide
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.
Connection Diagram
Pin Description
Pin Names
OE
1
, OE
2
I
0
–I
7
O
0
–O
7
Inputs
Outputs
Description
3-STATE Output Enable Inputs
FACT™, Quiet Series™, FACT Quiet Series™, and GTO™ are trademarks of Fairchild Semiconductor Corporation.
©1989 Fairchild Semiconductor Corporation
74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com
74ACQ244, 74ACTQ244 Quiet Series™ Octal Buffer/Line Driver with 3-STATE Outputs
Logic Symbol
IEE/IEC
Truth Tables
Inputs
OE
1
L
L
H
Outputs
I
n
L
H
X
Pins 12, 14, 16, 18
L
H
Z
Inputs
OE
2
L
L
H
Outputs
I
n
L
H
X
Pins 3, 5, 7, 9
L
H
Z
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Z
=
High Impedance
©1989 Fairchild Semiconductor Corporation
74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com
2
74ACQ244, 74ACTQ244 Quiet Series™ 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
Supply Voltage
ACQ
ACTQ
V
I
V
O
T
A
∆
V /
∆
t
∆
V /
∆
t
Input Voltage
Output Voltage
Operating Temperature
Parameter
Rating
2.0V to 6.0V
4.5V to 5.5V
0V to V
CC
0V to V
CC
–40°C to +85°C
125mV/ns
125mV/ns
Minimum Input Edge Rate, ACQ Devices:
V
IN
from 30% to 70% of V
CC
, V
CC
@ 3.0V, 4.5V, 5.5V
Minimum Input Edge Rate, ACTQ Devices:
V
IN
from 0.8V to 2.0V, V
CC
@ 4.5V, 5.5V
©1989 Fairchild Semiconductor Corporation
74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com
3
74ACQ244, 74ACTQ244 Quiet Series™ Octal Buffer/Line Driver with 3-STATE Outputs
DC Electrical Characteristics for ACQ
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
2.46
3.76
4.76
0.1
0.1
0.1
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
Guaranteed Limits
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.56
3.86
4.86
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
OZ
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
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)
I
OH
= –12mA
I
OH
= –24mA
I
OH
= –24mA
(1)
I
OUT
=
50µA
0.002
0.001
0.001
0.1
0.1
0.1
0.36
0.36
0.36
±0.1
4.0
±0.25
40.0
±2.5
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 (ACQ). Input-under-test switching:
5V to threshold (V
ILD
), 0V to threshold (V
IHD
), f
=
1MHz.
©1989 Fairchild Semiconductor Corporation
74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com
4
74ACQ244, 74ACTQ244 Quiet Series™ Octal Buffer/Line Driver with 3-STATE Outputs
DC Electrical Characteristics for ACTQ
T
A
=
+25°C
Symbol
V
IH
V
IL
V
OH
T
A
=
–40°C to +85°C
Units
V
V
V
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
±2.5
1.5
75
–75
µA
µA
mA
mA
mA
µA
V
V
V
V
V
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
Conditions
V
OUT
=
0.1V or
V
CC
– 0.1V
V
OUT
=
0.1V or
V
CC
– 0.1V
I
OUT
=
–50µA
V
IN
=
V
IL
or V
IH
:
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
Guaranteed Limits
4.5
5.5
V
OL
Maximum LOW Level
Output Voltage
4.5
5.5
I
OH
= –24mA
I
OH
= –24mA
(6)
I
OUT
=
50µA
V
IN
=
V
IL
or V
IH
:
0.001
0.001
I
OL
= 24mA
I
OL
= 24mA
(6)
V
I
=
V
CC
, GND
V
I
=
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
or GND
Figures 1 & 2
(8)
Figures 1 & 2
(8)
(9)
3.86
4.86
0.1
0.1
0.36
0.36
±0.1
±0.25
0.6
4.5
5.5
I
IN(3)
I
OZ
I
CCT
I
OLD
I
OHD
I
CC(3)
V
OLP
V
OLV
V
IHD
V
ILD
Maximum Input
Leakage Current
Maximum 3-STATE
Leakage Current
Maximum I
CC
/Input
Minimum Dynamic
Output Current
(7)
Maximum Quiescent
Supply 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
5.5
5.0
5.0
5.0
5.0
4.0
1.1
–0.6
1.9
1.2
1.5
–1.2
2.2
0.8
40.0
(9)
Notes:
6. All outputs loaded thresholds on input associated with output under test.
7. Maximum test duration 2.0ms, one output loaded at a time.
8. Max number of outputs defined as (n). Data Inputs are driven 0V to 3V. One output @ GND.
9. 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.
©1989 Fairchild Semiconductor Corporation
74ACQ244, 74ACTQ244 Rev. 1.3
www.fairchildsemi.com
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
