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74ACTQ244PC

P1-P3P4-P6P7-P9P10-P10
© 1999 Fairchild Semiconductor Corporation DS010235 www.fairchildsemi.com
July 1989
Revised November 1999
74ACQ244 • 74ACTQ244 Quiet Series Octal Buffer/Line Driver with 3-STATE Outputs
74ACQ244 • 74ACTQ244
Quiet Series Octal Buffer/Line Driver
with 3-STATE Outputs
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 uti-
lizes Fairchild Quiet Series technology to guarantee quiet
output 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.
Features
■ I
CC
and I
OZ
reduced by 50%
■ Guaranteed simultaneous switching noise level and
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 24 mA
■ Faster prop delays than the standard AC/ACT244
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
74ACQ244SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
74ACQ244SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ACQ244PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
74ACTQ244SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
74ACTQ244SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ACTQ244QSC MQA20 20-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150” Wide
74ACTQ244MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74ACTQ244PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Pin Names Description
OE
1
, OE
2
3-STATE Output Enable Inputs
I
0
–I
7
Inputs
O
0
–O
7
Outputs
www.fairchildsemi.com 2
74ACQ244 • 74ACTQ244
Logic Symbol
IEE/IEC
Truth Tables
H = HIGH Voltage Level
L = LOW Voltage Level
X = Inmaterial
Z = HIGH Impedance
Inputs Outputs
OE
1
In (Pins 12, 14, 16, 18)
LL L
LH H
HX Z
Inputs Outputs
OE
2
In (Pins 3, 5, 7, 9)
LL L
LH H
HX Z
3 www.fairchildsemi.com
74ACQ244 • 74ACTQ244
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 µA
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 µA
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 µAV
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 µAV
IN
= V
CC
or GND
(Note 4) Supply Current
I
OZ
Maximum 3-STATE V
I
(OE) = V
IL
, V
IH
Leakage Current 5.5 ±0.25 ±2.5 µAV
I
= V
CC
, GND
V
O
= V
CC
, GND
P1-P3P4-P6P7-P9P10-P10

74ACTQ244PC

Mfr. #:
Buy 74ACTQ244PC
Manufacturer:
ON Semiconductor / Fairchild
Description:
Buffers & Line Drivers Octal Buf/Line Drv
Lifecycle:
New from this manufacturer.
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