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74AC16244SSC

P1-P3P4-P6P7-P7
© 2005 Fairchild Semiconductor Corporation DS500295 www.fairchildsemi.com
August 1999
Revised May 2005
74AC16244 • 74ACT16244 16-Bit Buffer/Line Driver with 3-STATE Outputs
74AC16244 • 74ACT16244
16-Bit Buffer/Line Driver with 3-STATE Outputs
General Description
The AC16244 and ACT16244 contain sixteen non-inverting
buffers with 3-STATE outputs designed to be employed as
a memory and address driver, clock driver, or bus oriented
transmitter/receiver. The device is nibble controlled. Each
nibble has separate 3-STATE control inputs which can be
shorted together for full 16-bit operation.
Features
■ Separate control logic for each byte and nibble
■ 16-bit version of the AC244/ACT244
■ Outputs source/sink 24 mA
■ ACT16244 has TTL-compatible inputs
Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
Pin Descriptions
Connection Diagram
FACT is a trademark of Fairchild Semiconductor Corporation.
Order Number Package Number Package Description
74AC16244SSC MS48A 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300" Wide
74ACT16244SSC MS48A 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300" Wide
74ACT16244MTD MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Pin Names Description
OE
n
Output Enable Input (Active LOW)
I
0
- I
15
Inputs
O
0
- 0
15
Outputs
www.fairchildsemi.com 2
74AC16244 • 74ACT16244
Functional Description
The AC16244 and ACT16244 contain sixteen non-inverting
buffers with 3-STATE standard outputs. The device is nib-
ble (4 bits) controlled with each nibble functioning identi-
cally, but independent of the other. The control pins can be
shorted together to obtain full 16-bit operation. The
3-STATE outputs are controlled by an Output Enable (OE
n
)
input for each nibble. When OE
n
is LOW, the outputs are in
2-state mode. When OE
n
is HIGH, the outputs are in the
high impedance mode, but this does not interfere with
entering new data into the inputs.
Truth Tables
L LOW Voltage Level
H
HIGH Voltage Level
X
Immaterial
Z
High Impedance
Logic Diagram
Inputs Outputs
OE
1
I
0
–I
3
O
0
–O
3
LL L
LH H
HX Z
Inputs Outputs
OE
2
I
4
–I
7
O
4
–O
7
LL L
LH H
HX Z
Inputs Outputs
OE
3
I
8
–I
11
O
8
–O
11
LL L
LH H
HX Z
Inputs Outputs
OE
4
I
12
–I
15
O
12
–O
15
LL L
LH H
HX Z
3 www.fairchildsemi.com
74AC16244 • 74ACT16244
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 AC
Note 2: All outputs loaded; thresholds associated with output under test.
Note 3: I
IN
and I
CC
@ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V V
CC
.
Note 4: Maximum test duration 2.0 millisecond; one output loaded at a time.
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 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/Sink Current (I
O
) 50 mA
DC V
CC
or Ground Current
per Output Pin
50 mA
Junction Temperature
140 C
Storage Temperature
65 C to 150 C
Supply Voltage (V
CC
)
AC 2.0V to 6.0V
ACT 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)
AC Devices
V
IN
from 30% to 70%
V
CC
@ 3.3V, 4.5V, 5.5V 125 mV/ns
Minimum Input Edge Rate (
V/ t)
ACT 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 CT
A
40 C to 85 C
Units Conditions
(V) Typ Guaranteed Limits
V
IH
Minimum HIGH Input Voltage 3.0 1.5 2.1 2.1
V
V
OUT
0.1V
4.5 2.25 3.15 3.15 or V
CC
0.1V
5.5 2.75 3.85 3.85
V
IL
Maximum LOW Input Voltage 3.0 1.5 0.9 0.9
V
V
OUT
0.1V
4.5 2.25 1.35 1.35 or V
CC
0.1V
5.5 2.75 1.65 1.65
V
OH
Minimum HIGH Output Voltage 3.0 2.99 2.9 2.9
VI
OUT
50 A4.5 4.49 4.4 4.4
5.5 5.49 5.4 5.4
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 Output Voltage 3.0 0.002 0.1 0.1
VI
OUT
50 A4.5 0.001 0.1 0.1
5.5 0.001 0.1 0.1
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
OZ
Maximum 3-STATE Leakage Current 5.5 0.50 5.0 AV
I
(OE) V
IL
, V
IH
V
I
V
CC
, GND
V
O
V
CC
, GND
I
IN
Maximum Input Leakage Current (Note 3) 5.5 0.1 1.0 AV
I
V
CC
, GND
I
CC
Max Quiescent Supply Current (Note 3) 5.5 8.0 80.0 AV
IN
V
CC
or GND
I
OLD
Minimum Dynamic 5.5 75 mA V
OLD
1.65V Max
I
OHD
Output Current (Note 4) 5.5 75 mA V
OHD
3.85V Min
P1-P3P4-P6P7-P7

74AC16244SSC

Mfr. #:
Buy 74AC16244SSC
Manufacturer:
ON Semiconductor / Fairchild
Description:
Buffers & Line Drivers Buffer/Line Driver 16 Bit
Lifecycle:
New from this manufacturer.
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