Fairchild Semiconductor 74ACTQ16244SSCX, 74ACTQ16244SSC, 74ACTQ16244MTDX, 74ACTQ16244MTD, 74ACTQ16244CW Datasheet
May 1991
Revised November 1999
74ACTQ16244
16-Bit Buffer/Line Driver with 3-STATE Outputs
General Description
The ACTQ16244 contains 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.
The ACTQ16244 utilizes Fairchild’s Quiet Series technology to guarantee quiet output switching and improved dynamic threshold performance. FACT Quiet Series features GTO output control for superior performance.
Features
■Utilizes Fairchild’s FACT Quiet Series technology
■Guaranteed simultaneous switching noise level and dynamic threshold performance
■Guaranteed pin-to-pin output skew
■Separate control logic for each byte and nibble
■16-bit version of the ACTQ244
■Outputs source/sink 24 mA
■Additional specs for multiple output switching
■Output loading specs for both 50 pF and 250 pF loads
Ordering Code:
Order Number |
Package Number |
Package Description |
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74ACTQ16244SSC |
MS48A |
48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300” Wide |
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74ACTQ16244MTD |
MTD48 |
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide |
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Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
Pin Description
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Pin Names |
Description |
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n |
Output Enable Input (Active LOW) |
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OE |
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I0–I15 |
Inputs |
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O0–O15 |
Outputs |
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FACT , FACT Quiet Series , and GTO are trademarks of Fairchild Semiconductor Corporation.
Outputs STATE-3 with Driver Buffer/Line Bit-16 74ACTQ16244
© 1999 Fairchild Semiconductor Corporation |
DS010925 |
www.fairchildsemi.com |
74ACTQ16244
Connection Diagram
Logic Diagram
Functional Description
The ACTQ16244 contains sixteen non-inverting buffers with 3-STATE standard outputs. The device is nibble (4 bits) controlled with each nibble functioning identically, 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 (OEn)
input for each nibble. When OEn is LOW, the outputs are in
2-state mode. When OEn is HIGH, the outputs are in the high impedance mode, but this does not interfere with entering new data into the inputs.
Truth Tables
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Inputs |
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Outputs |
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OE1 |
I0–I3 |
O0–O3 |
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L |
L |
L |
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L |
H |
H |
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H |
X |
Z |
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Inputs |
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Outputs |
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OE2 |
I4–I7 |
O4–O7 |
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L |
L |
L |
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L |
H |
H |
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H |
X |
Z |
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Inputs |
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Outputs |
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OE3 |
I8–I11 |
O8–O11 |
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L |
L |
L |
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L |
H |
H |
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H |
X |
Z |
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Inputs |
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Outputs |
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OE4 |
I12–I15 |
O12–O15 |
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L |
L |
L |
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L |
H |
H |
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H |
X |
Z |
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H = HIGH Voltage Level |
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L = LOW Voltage Level |
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X = Immaterial |
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Z = High Impedance |
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www.fairchildsemi.com |
2 |
Absolute Maximum Ratings(Note 1)
Supply Voltage (VCC) |
− 0.5V to + 7.0V |
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DC Input Diode Current (IIK) |
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VI = |
− 0.5V |
− 20 mA |
VI = |
VCC + 0.5V |
+ 20 mA |
DC Output Diode Current (IOK) |
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VO = |
− 0.5V |
− 20 mA |
VO = |
VCC + 0.5V |
+ 20 mA |
DC Output Voltage (VO) |
− 0.5V to VCC + 0.5V |
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DC Output Source/Sink Current (IO) |
± 50 mA |
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DC VCC or Ground Current |
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per Output Pin |
± 50 mA |
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Junction Temperature |
+ 140° C |
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Storage Temperature |
− 65° C to + 150° C |
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Recommended Operating
Conditions
Supply Voltage (VCC) |
4.5V to 5.5V |
Input Voltage (VI) |
0V to VCC |
Output Voltage (VO) |
0V to VCC |
Operating Temperature (TA) |
− 40° C to + 85° C |
Minimum Input Edge Rate (∆ V/∆ t) |
125 mV/ns |
VIN from 0.8V to 2.0V |
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VCC @ 4.5V, 5.5V |
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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. Fairchild does not recommend operation of FACT circuits outside databook specifications.
DC Electrical Characteristics
Symbol |
Parameter |
VCC |
TA = + 25° C |
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TA = − 40° C to + 85° C |
Units |
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Conditions |
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(V) |
Typ |
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Guaranteed Limits |
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VIH |
Minimum HIGH |
4.5 |
1.5 |
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2.0 |
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2.0 |
V |
VOUT = |
0.1V |
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Input Voltage |
5.5 |
1.5 |
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2.0 |
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2.0 |
or VCC − |
0.1V |
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VIL |
Maximum LOW |
4.5 |
1.5 |
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0.8 |
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0.8 |
V |
VOUT = |
0.1V |
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Input Voltage |
5.5 |
1.5 |
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0.8 |
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0.8 |
or VCC − |
0.1V |
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VOH |
Minimum HIGH |
4.5 |
4.49 |
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4.4 |
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4.4 |
V |
IOUT = |
− |
50 µ A |
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Output Voltage |
5.5 |
5.49 |
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5.4 |
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5.4 |
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VIN = |
VIL or VIH |
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4.5 |
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3.86 |
3.76 |
V |
IOH = |
− |
24 mA |
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5.5 |
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4.86 |
4.76 |
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IOH = |
− 24 mA (Note 2) |
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VOL |
Maximum LOW |
4.5 |
0.001 |
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0.1 |
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0.1 |
V |
IOUT = |
50 µ A |
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Output Voltage |
5.5 |
0.001 |
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0.1 |
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0.1 |
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VIN = |
VIL or VIH |
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4.5 |
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0.36 |
0.44 |
V |
IOH = |
24 mA |
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5.5 |
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0.36 |
0.44 |
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IOH = |
24 mA (Note 2) |
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IOZ |
Maximum 3-STATE |
5.5 |
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± |
0.5 |
± |
5.0 |
µ A |
VI = |
VIL, VIH |
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Leakage Current |
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VO = |
VCC, GND |
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IIN |
Maximum Input Leakage Current |
5.5 |
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± |
0.1 |
± |
1.0 |
µ A |
VI = |
VCC, GND |
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ICCT |
Maximum ICC/Input |
5.5 |
0.6 |
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1.5 |
mA |
VI = |
VCC − 2.1V |
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ICC |
Max Quiescent Supply Current |
5.5 |
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8.0 |
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80.0 |
µ A |
VIN = |
VCC or GND (Note 6) |
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IOLD |
Minimum Dynamic |
5.5 |
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75 |
mA |
VOLD = |
1.65V Max |
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IOHD |
Output Current (Note 3) |
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− 75 |
mA |
VOHD = |
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3.85V Min |
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VOLP |
Quiet Output Maximum Dynamic VOL |
5.0 |
0.5 |
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0.8 |
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V |
Figure 1, Figure 2 |
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(Note 5)(Note 6) |
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VOLV |
Quiet Output Minimum Dynamic VOL |
5.0 |
− 0.5 |
− 1.0 |
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V |
Figure 1, Figure 2 |
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(Note 5)(Note 6) |
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VOHP |
Maximum Overshoot |
5.0 |
VOH + |
1.0 |
VOH + |
1.5 |
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V |
(Note 4)(Note 6) |
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VOHV |
Minimum VCC Droop |
5.0 |
VOH − |
1.0 |
VOH − |
1.8 |
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V |
(Note 4)(Note 6) |
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VIHD |
Minimum HIGH Dynamic Input Voltage Level |
5.0 |
1.7 |
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2.0 |
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V |
(Note 4)(Note 7) |
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VILD |
Maximum LOW Dynamic Input Voltage Level |
5.0 |
1.2 |
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0.8 |
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V |
(Note 4)(Note 7) |
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Note 2: All outputs loaded; thresholds associated with output under test.
Note 3: Maximum test duration 2.0 ms; one output loaded at a time.
Note 4: Worst case package.
Note 5: Maximum number of outputs that can switch simultaneously is n. (n − 1) outputs are switched LOW and one output held LOW.
Note 6: Maximum number of outputs that can switch simultaneously is n. (n − 1) outputs are switched HIGH and one output held HIGH.
Note 7: Max number of data inputs (n) switching. (n − 1) input switching 0V to 3V input under test switching 3V to threshold (VILD)
74ACTQ16244
3 |
www.fairchildsemi.com |
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