Motorola MC74ACT540DW, MC74ACT541N, MC74ACT541DW, MC74ACT540N, MC74AC540DW Datasheet
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Octal Buffer/Line Driver with 3!State Outputs
The MC74AC540/74ACT540 and MC74AC541/74ACT541 are octal buffer/line drivers designed to be employed as memory and address drivers, clock drivers and bus oriented transmitter/receivers. The MC74AC541/74ACT541 is a noninverting option of the MC74AC540/74ACT540.
These devices are similar in function to the MC74AC240/74ACT240 and MC74AC244/74ACT244 while providing flow-through architecture (inputs on opposite side from outputs). This pinout arrangement makes these devices especially useful as output ports for microprocessors, allowing ease of layout and greater PC board density.
•3-State Outputs
•Inputs and Outputs Opposite Side of Package, Allowing Easier Interface to Microprocessors
•Outputs Source/Sink 24 mA
•MC74AC540/74ACT540 Provides Inverted Outputs
•MC74AC541/74ACT541 Provides Noninverted Outputs
•′ACT540 and ′ACT541 Have TTL Compatible Inputs
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MC74AC540/74ACT540 |
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OE1 |
1 |
20 |
VCC |
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2 |
19 |
OE2 |
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3 |
18 |
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4 |
17 |
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5 |
16 |
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6 |
15 |
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7 |
14 |
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8 |
13 |
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9 |
12 |
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GND |
10 |
11 |
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MC74AC541/74ACT541 |
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OE1 |
1 |
20 |
VCC |
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2 |
19 |
OE2 |
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3 |
18 |
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4 |
17 |
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5 |
16 |
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6 |
15 |
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7 |
14 |
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8 |
13 |
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9 |
12 |
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GND |
10 |
11 |
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MC74AC540
MC74ACT540
MC74AC541
MC74ACT541
OCTAL
BUFFER/LINE DRIVER
WITH 3-STATE
OUTPUTS
N SUFFIX
CASE 738-03
PLASTIC
DW SUFFIX
CASE 751D-04
PLASTIC
TRUTH TABLE
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Inputs |
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Outputs |
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OE1 |
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OE2 |
D |
′540 |
′541 |
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L |
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L |
H |
L |
H |
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H |
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X |
X |
Z |
Z |
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X |
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H |
X |
Z |
Z |
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L |
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L |
L |
H |
L |
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H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
FACT DATA
5-1
MC74AC540 MC74ACT540 MC74AC541 MC74ACT541
MAXIMUM RATINGS*
Symbol |
Parameter |
Value |
Unit |
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VCC |
DC Supply Voltage (Referenced to GND) |
±0.5 to +7.0 |
V |
Vin |
DC Input Voltage (Referenced to GND) |
±0.5 to VCC +0.5 |
V |
Vout |
DC Output Voltage (Referenced to GND) |
±0.5 to VCC +0.5 |
V |
Iin |
DC Input Current, per Pin |
±20 |
mA |
Iout |
DC Output Sink/Source Current, per Pin |
±50 |
mA |
ICC |
DC VCC or GND Current per Output Pin |
±50 |
mA |
Tstg |
Storage Temperature |
±65 to +150 |
°C |
*Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol |
Parameter |
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Min |
Typ |
Max |
Unit |
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VCC |
Supply Voltage |
′AC |
2.0 |
5.0 |
6.0 |
V |
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′ACT |
4.5 |
5.0 |
5.5 |
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Vin, Vout |
DC Input Voltage, Output Voltage (Ref. to GND) |
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0 |
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VCC |
V |
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Input Rise and Fall Time (Note 1) |
VCC @ 3.0 V |
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150 |
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tr, tf |
VCC @ 4.5 V |
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40 |
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ns/V |
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′AC Devices except Schmitt Inputs |
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VCC @ 5.5 V |
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25 |
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tr, tf |
Input Rise and Fall Time (Note 2) |
VCC @ 4.5 V |
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10 |
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ns/V |
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′ACT Devices except Schmitt Inputs |
VCC @ 5.5 V |
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8.0 |
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TJ |
Junction Temperature (PDIP) |
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140 |
°C |
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TA |
Operating Ambient Temperature Range |
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±40 |
25 |
85 |
°C |
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IOH |
Output Current Ð High |
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±24 |
mA |
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IOL |
Output Current Ð Low |
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24 |
mA |
1.Vin from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times.
2.Vin from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.
FACT DATA
5-2
MC74AC540 MC74ACT540 MC74AC541 MC74ACT541
DC CHARACTERISTICS
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74AC |
74AC |
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Symbol |
Parameter |
VCC |
TA = +25°C |
TA = |
Unit |
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Conditions |
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(V) |
±40°C to +85°C |
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Typ |
Guaranteed Limits |
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VIH |
Minimum High Level |
3.0 |
1.5 |
2.1 |
2.1 |
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VOUT = 0.1 V |
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Input Voltage |
4.5 |
2.25 |
3.15 |
3.15 |
V |
or VCC ± 0.1 V |
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5.5 |
2.75 |
3.85 |
3.85 |
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VIL |
Maximum Low Level |
3.0 |
1.5 |
0.9 |
0.9 |
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VOUT = 0.1 V |
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Input Voltage |
4.5 |
2.25 |
1.35 |
1.35 |
V |
or VCC ± 0.1 V |
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5.5 |
2.75 |
1.65 |
1.65 |
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VOH |
Minimum High Level |
3.0 |
2.99 |
2.9 |
2.9 |
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IOUT = ±50 μA |
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Output Voltage |
4.5 |
4.49 |
4.4 |
4.4 |
V |
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5.5 |
5.49 |
5.4 |
5.4 |
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*VIN = VIL or VIH |
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3.0 |
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2.56 |
2.46 |
V |
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±12 mA |
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4.5 |
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3.86 |
3.76 |
IOH |
±24 mA |
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5.5 |
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4.86 |
4.76 |
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±24 mA |
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VOL |
Maximum Low Level |
3.0 |
0.002 |
0.1 |
0.1 |
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IOUT = 50 μA |
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Output Voltage |
4.5 |
0.001 |
0.1 |
0.1 |
V |
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5.5 |
0.001 |
0.1 |
0.1 |
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*VIN = VIL or VIH |
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3.0 |
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0.36 |
0.44 |
V |
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12 mA |
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4.5 |
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0.36 |
0.44 |
IOL |
24 mA |
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5.5 |
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0.36 |
0.44 |
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24 mA |
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IIN |
Maximum Input |
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± |
± |
μ |
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Leakage Current |
5.5 |
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0.1 |
1.0 |
A |
VI = VCC, GND |
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IOZ |
Maximum |
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VI (OE) = VIL, VIH |
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3-State |
5.5 |
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±0.5 |
±5.0 |
μA |
VI = VCC, GND |
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Current |
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VO = VCC, GND |
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IOLD |
²Minimum Dynamic |
5.5 |
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75 |
mA |
VOLD = 1.65 V Max |
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Output Current |
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IOHD |
5.5 |
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±75 |
mA |
VOHD = 3.85 V Min |
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ICC |
Maximum Quiescent |
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μ |
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Supply Current |
5.5 |
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8.0 |
80 |
A |
VIN = VCC or GND |
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* All outputs loaded; thresholds on input associated with output under test. ² Maximum test duration 2.0 ms, one output loaded at a time.
Note: IIN and ICC @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V VCC.
FACT DATA
5-3
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