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54ACQ240•54ACTQ240
Quiet Series Octal Buffer/Line Driver with TRI-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 NSC Quiet Series technology to guaranteequiet 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
n ICCand IOZreduced by 50
%
n Guaranteed simultaneous switching noise level and
dynamic threshold performance
n Improved latch-up immunity
n Inverting TRI-STATE outputs drive bus lines or buffer
memory address registers
n Outputs source/sink 24 mA
n Faster prop delays than the standard ’ACT240
n 4 kV minimum ESD immunity
n Standard Microcircuit Drawing (SMD)
’ACTQ240: 5962-92184
Logic Symbol
Pin Names Description
OE
1
,OE
2
TRI-STATE Output Enable Inputs
I
0–I7
Inputs
O
0–O7
Outputs
Connection Diagrams
GTO™is a trademark of National Semiconductor Corporation.
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
FACT
®
is a registered trademark of Fairchild Semiconductor Corporation.
FACT Quiet Series
™
is a trademark of Fairchild Semiconductor Corporation.
IEEE/IEC
DS100235-1
Pin Assignment
for DIP and Flatpak
DS100235-2
Pin Assignment
for LCC
DS100235-3
February 1999
54ACQ240
•
54ACTQ240 Quiet Series Octal Buffer/Line Driver with TRI-STATE Outputs
© 1999 National Semiconductor Corporation DS100235 www.national.com
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Truth Tables
Inputs Outputs
OE
1
I
n
(Pins 12, 14, 16, 18)
LL H
LH L
HX Z
Inputs Outputs
OE
2
I
n
(Pins 3, 5, 7, 9)
LL H
LH L
HX Z
H
=
HIGH Voltage Level
L=LOW Voltage Level
X=Immaterial
Z=High Impedance
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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
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 VCC+ 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 VCC+ 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
)
CDIP 175˚C
Recommended Operating
Conditions
Supply Voltage (VCC)
’ACQ 2.0V to 6.0V
’ACTQ 4.5V to 5.5V
Input Voltage (V
I
) 0VtoV
CC
Output Voltage (VO) 0VtoV
CC
Operating Temperature (TA)
54ACQ/ACTQ −55˚C to +125˚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
Note 1: Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, without
exception, to ensure that the system design is reliable over its power supply,
temperature, and output/input loading variables. National does not recommend operation of FACT
®
circuits outside databook specifications.
Note 2: All commercial packaging is not recommended for applications requiring greater than 2000 temperature cycles from −40˚C to +125˚C.
DC Characteristics for ’ACQ Family Devices
54ACQ
Symbol Parameter V
CC
T
A
=
Units Conditions
(V) −55˚C to +125˚C
Guaranteed Limits
V
IH
Minimum High Level 3.0 2.1 V
OUT
=
0.1V
Input Voltage 4.5 3.15 V or V
CC
− 0.1V
5.5 3.85
V
IL
Maximum Low Level 3.0 0.9 V
OUT
=
0.1V
Input Voltage 4.5 1.35 V or V
CC
− 0.1V
5.5 1.65
V
OH
Minimum High Level 3.0 2.9 I
OUT
=
−50 µA
Output Voltage 4.5 4.4 V
5.5 5.4
(Note 3)
V
IN
=
V
IL
or V
IH
3.0 2.4 IOH= −12 mA
4.5 3.7 V I
OH
= −24 mA
5.5 4.7 I
OH
= −24 mA
V
OL
Maximum Low Level 3.0 0.1 I
OUT
=
50 µA
Output Voltage 4.5 0.1 V
5.5 0.1
(Note 3)
V
IN
=
V
IL
or V
IH
3.0 0.50 IOL=12mA
4.5 0.50 V I
OL
=24mA
5.5 0.50 I
OL
=24mA
I
IN
Maximum Input 5.5
±
1.0 µA V
I
=
V
CC
, GND
Leakage Current (Note 5)
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DC Characteristics for ’ACQ Family Devices (Continued)
54ACQ
Symbol Parameter V
CC
T
A
=
Units Conditions
(V) −55˚C to +125˚C
Guaranteed Limits
I
OLD
Minimum Dynamic
(Note 4)
5.5 50 mA V
OLD
=
1.65V Max
I
OHD
Output Current 5.5 −50 mA V
OHD
=
3.85V Min
I
CC
Maximum Quiescent 5.5 80.0 µA V
IN
=
V
CC
Supply Current or GND (Note 5)
I
OZ
Maximum TRI-STATE VI(OE)=VIL,V
IH
Leakage Current 5.5
±
5.0 µA V
I
=
V
CC
, GND
V
O
=
V
CC
, GND
V
OLP
Quiet Output
Maximum Dynamic V
OL
5.0
1.5V
V
(Notes 6, 7)
V
OLV
Quiet Output
Minimum Dynamic V
OL
5.0
−1.2V
V
(Notes 6, 7)
Note 3: All outputs loaded; thresholds on input associated with output under test.
Note 4: Maximum test duration 2.0 ms, one output loaded at a time.
Note 5: I
IN
and I
CC
@
3.0V are guaranteed to be less than or equal to the respective limit@5.5V VCC.
I
CC
for 54ACQ@25˚C is identical to 74ACQ@25˚C.
Note 6: Plastic DIP package.
Note 7: Max number of outputs defined as (n). Data inputs are driven 0V to 5V. One output
@
GND.
Note 8: 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 Characteristics for ’ACTQ Family Devices
54ACTQ
Symbol Parameter V
CC
T
A
=
Units Conditions
(V) −55˚C to +125˚C
Guaranteed
Limits
V
IH
Minimum High Level 4.5 2.0 V V
OUT
=
0.1V
Input Voltage 5.5 2.0 or V
CC
− 0.1V
V
IL
Maximum Low Level 4.5 0.8 V V
OUT
=
0.1V
Input Voltage 5.5 0.8 or V
CC
− 0.1V
V
OH
Minimum High Level 4.5 4.4 V I
OUT
=
−50 µA
Output Voltage 5.5 5.4
(Note 9)
V
IN
=
V
IL
or V
IH
4.5 3.70 V IOH= −24 mA
5.5 4.70 I
OH
= −24 mA
V
OL
Maximum Low Level 4.5 0.1 V I
OUT
=
50 µA
Output Voltage 5.5 0.1
(Note 9)
V
IN
=
V
IL
or V
IH
4.5 0.50 V IOL=24mA
5.5 0.50 I
OL
=24mA
I
IN
Maximum Input 5.5
±
1.0 µA V
I
=
V
CC
, GND
Leakage Current
I
OZ
Maximum TRI-STATE 5.5
±
5.0 µA V
I
=
V
IL,VIH
Leakage Current V
O
=
V
CC
, GND
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DC Characteristics for ’ACTQ Family Devices (Continued)
54ACTQ
Symbol Parameter V
CC
T
A
=
Units Conditions
(V) −55˚C to +125˚C
Guaranteed
Limits
I
CCT
Maximum 5.5 1.6 mA V
I
=
V
CC
− 2.1V
I
CC
/Input
I
OLD
Minimum Dynamic
(Note 10)
5.5 50 mA V
OLD
=
1.65V Max
I
OHD
Output Current 5.5 −50 mA V
OHD
=
3.85V Min
I
CC
Maximum Quiescent 5.5 80.0 µA V
IN
=
V
CC
Supply Current or GND (Note 11)
V
OLP
Quiet Output Maximum
Dynamic V
OL
5.0
1.5V
V
(Notes 12, 13)
V
OLV
Quiet Output Minimum
Dynamic V
OL
5.0
−1.2V
V
(Notes 12, 13)
Note 9: All outputs loaded; thresholds on input associated with output under test.
Note 10: Maximum test duration 2.0 ms, one output loaded at a time.
Note 11: I
CC
for 54ACTQ@25˚C is identical to 74ACTQ@25˚C.
Note 12: Plastic DIP package.
Note 13: Max number of Data Inputs defined as (n). n−1 Data Inputs are driven 0V to 3V. One Data Input
@
V
IN
=
GND.
Note 14: 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.
AC Electrical Characteristics
54ACQ
V
CC
T
A
=
−55˚C Fig.
Symbol Parameter (V) to +125˚C Units No.
(Note 15) C
L
=
50 pF
Min Max
t
PHL,tPLH
Propagation Delay 3.3 1.0 12.5 ns
Data to Output 5.0 1.0 9.0
t
PZL,tPZH
Output Enable Time 3.3 1.0 13.5 ns
5.0 1.0 10.0
t
PHZ,tPLZ
Output Disable Time 3.3 1.0 11.0 ns
5.0 1.0 9.0
Note 15: Voltage Range 5.0 is 5.0V±0.5V
Voltage Range 3.3 is 3.3
±
0.3V.
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.
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AC Electrical Characteristics
54ACTQ
V
CC
T
A
=
−55˚C Fig.
Symbol Parameter (V) to +125˚C Units No.
(Note 17) C
L
=
50 pF
Min Max
t
PHL,tPLH
Propagation Delay 5.0 1.5 9.0 ns
Data to Output
t
PZL,tPZH
Output Enable Time 5.0 1.5 11.0 ns
t
PHZ,tPLZ
Output Disable Time 5.0 1.5 10.0 ns
Note 17: Voltage Range 5.0 is 5.0V±0.5V
Note 18: 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 speci-
fication 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 Parameter Typ Units Conditions
C
IN
Input Capacitance 4.5 pF V
CC
=
OPEN
C
PD
Power Dissipation 70 pF V
CC
=
5.0V
Capacitance
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Physical Dimensions inches (millimeters) unless otherwise noted
20-Terminal Ceramic Leadless Chip Carrier (L)
NS Package Number E20A
20-Lead Ceramic Dual-In-Line Package (D)
NS Package Number J20A
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into
the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance
with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury
to the user.
2. A critical component is any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failureof the lifesupport
device or system, or to affect its safety or effectiveness.
National Semiconductor
Corporation
Americas
Tel: 1-800-272-9959
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Email: support@nsc.com
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Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
20-Lead Ceramic Flatpak (F)
NS Package Number W20A
54ACQ240
•
54ACTQ240 Quiet Series Octal Buffer/Line Driver with TRI-STATE Outputs
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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