NSC 5962R9218701VSA, 5962R9218701VRA, 5962R9218701V2A, 5962R9218701MSA, 5962R9218701MRA Datasheet
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54ACQ245•54ACTQ245
Quiet Series Octal Bidirectional Transceiver with
TRI-STATE
®
Inputs/Outputs
General Description
The ’ACQ/’ACTQ245 contains eight non-inverting bidirectional buffers with TRI-STATE outputs and is intended for
bus-oriented applications. Current sinking capability is
24 mAatboth the Aand B ports. The Transmit/Receive(T/R)
input determines the direction of data flow through the bidirectional transceiver. Transmit (active-HIGH) enables data
from A ports to B ports; Receive (active-LOW) enables data
from B ports to A ports. The Output Enable input, when
HIGH, disables bothA and B ports by placing them in a HIGH
Z condition.
The ’ACQ/’ACTQ utilizes NSC 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
n ICCand IOZreduced by 50
%
n Guaranteed simultaneous switching noise level and
dynamic threshold performance
n Improved latch-up immunity
n TRI-STATE outputs drive bus lines or buffer memory
address registers
n Outputs source/sink 24 mA
n Faster prop delays than the standard ’ACT245
n 4 kV minimum ESD immunity (’ACQ)
n Standard Military Drawing (SMD)
— ’ACTQ245: 5962-92187
— ’ACQ245: 5962-92177
Logic Symbols
Pin Description
Names
OE
Output Enable Input
T/R
Transmit/Receive Input
A
0–A7
Side A TRI-STATE Inputs or TRI-STATE Outputs
B
0–B7
Side B TRI-STATE Inputs or TRI-STATE Outputs
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.
DS100237-1
IEEE/IEC
DS100237-2
September 1998
54ACQ245
•
54ACTQ245 Quiet Series Octal Bidirectional Transceiver with TRI-STATE
Inputs/Outputs
© 1998 National Semiconductor Corporation DS100237 www.national.com
Connection Diagrams
Truth Table
Inputs Outputs
OE
T/R
L L Bus B Data to Bus A
L H Bus A Data to Bus B
H X HIGH-Z State
H=HIGH Voltage Level
L=LOW Voltage Level
X=Immaterial
Pin Assignment for
DIP and Flatpak
DS100237-3
Pin Assignment
for LCC
DS100237-4
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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.
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 3.0 2.1 V
OUT
=
0.1V
Level Input 4.5 3.15 V or V
CC
− 0.1V
Voltage 5.5 3.85
V
IL
Maximum Low 3.0 0.9 V
OUT
=
0.1V
Level Input 4.5 1.35 V or V
CC
− 0.1V
Voltage 5.5 1.65
V
OH
Minimum High 3.0 2.9 I
OUT
=
−50 µA
Level Output 4.5 4.4 V
Voltage 5.5 5.4
(Note 2)
V
IN
=
V
IL
or V
IH
3.0 2.4 −12 mA
4.5 3.7 V I
OH
−24 mA
5.5 4.7 −24 mA
V
OL
Maximum Low 3.0 0.1 I
OUT
=
50 µA
Level Output 4.5 0.1 V
Voltage 5.5 0.1
(Note 2)
V
IN
=
V
IL
or V
IH
3.0 0.50 12 mA
4.5 0.50 V I
OL
24 mA
5.5 0.50 24 mA
I
IN
Maximum Input 5.5
±
1.0 µA V
I
=
V
CC
, GND
Leakage Current (Note 4)
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