Motorola MC74ACT540DW, MC74ACT541N, MC74ACT541DW, MC74ACT540N, MC74AC540DW Datasheet

5-1

FACT DATA

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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

TRUTH TABLE

Inputs Outputs

OE1OE

2

D ′540 ′541

L L H L H
H X X Z Z
X H X Z Z

L L L H L

H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance

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OCTAL

BUFFER/LINE DRIVER

WITH 3-STATE

OUTPUTS

N SUFFIX

CASE 738-03

PLASTIC

DW SUFFIX

CASE 751D-04

PLASTIC

1

OE

1

2

3

4

5

6

7

8

9

10

GND

20

19

18

17

16

15

14

13

12

11

V

CC

OE

2

MC74AC540/74ACT540

1

OE

1

2

3

4

5

6

7

8

9

10

GND

20

19

18

17

16

15

14

13

12

11

V

CC

OE

2

MC74AC541/74ACT541

MC74AC540 MC74ACT540 MC74AC541 MC74ACT541

5-2

FACT DATA

MAXIMUM RATINGS*

Symbol Parameter Value Unit

V

CC

DC Supply Voltage (Referenced to GND) –0.5 to +7.0 V

V

in

DC Input Voltage (Referenced to GND) –0.5 to VCC +0.5 V

V

out

DC Output Voltage (Referenced to GND) –0.5 to VCC +0.5 V

I

in

DC Input Current, per Pin ±20 mA

I

out

DC Output Sink/Source Current, per Pin ±50 mA

I

CC

DC VCC or GND Current per Output Pin ±50 mA

T

stg

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 Min Typ Max Unit

′AC 2.0 5.0 6.0

VCCSupply Voltage

′ACT 4.5 5.0 5.5

V

Vin, V

out

DC Input Voltage, Output Voltage (Ref. to GND) 0 V

CC

V

VCC @ 3.0 V 150

Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs

VCC @ 4.5 V 40 ns/V

r

, t

f

′AC Devices except Schmitt Inputs

VCC @ 5.5 V 25
VCC @ 4.5 V 10

tr, t

f

Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs

VCC @ 5.5 V 8.0

ns/V

T

J

Junction Temperature (PDIP) 140 °C

T

A

Operating Ambient Temperature Range –40 25 85 °C

I

OH

Output Current — High –24 mA

I

OL

Output Current — Low 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.

tr, t

f

Input Rise and Fall Time (Note 2)

MC74AC540 MC74ACT540 MC74AC541 MC74ACT541

5-3

FACT DATA

DC CHARACTERISTICS

74AC 74AC

Symbol

Parameter

V

CC

(V)

TA = +25°C

TA =

–40°C to +85°C

Unit

Conditions

Typ Guaranteed Limits

V

IH

3.0 1.5 2.1 2.1 V

OUT

= 0.1 V

4.5 2.25 3.15 3.15 V or VCC – 0.1 V

5.5 2.75 3.85 3.85

V

IL

3.0 1.5 0.9 0.9 V

OUT

= 0.1 V

4.5 2.25 1.35 1.35 V or VCC – 0.1 V

5.5 2.75 1.65 1.65

V

OH

3.0 2.99 2.9 2.9 I

OUT

= –50 µA

4.5 4.49 4.4 4.4 V

5.5 5.49 5.4 5.4
*VIN = VIL or V

IH

3.0 2.56 2.46

–12 mA

4.5 3.86 3.76

V

I

OH

–24 mA

5.5 4.86 4.76 –24 mA

V

OL

3.0 0.002 0.1 0.1 I

OUT

= 50 µA

4.5 0.001 0.1 0.1 V

5.5 0.001 0.1 0.1
*VIN = VIL or V

IH

3.0 0.36 0.44

12 mA

4.5 0.36 0.44

V

I

OL

24 mA

5.5 0.36 0.44 24 mA

I

IN

5.5

±0.1

±1.0

µA

VI = VCC, GND

I

OZ

VI (OE) = VIL, V

IH

5.5 ±0.5 ±5.0 µA VI = VCC, GND
VO = VCC, GND

I

OLD

5.5 75 mA V

OLD

= 1.65 V Max

I

OHD

Output Current

5.5 –75 mA V

OHD

= 3.85 V Min

I

CC

5.5

8.080µA

VIN = VCC or GND

* All outputs loaded; thresholds on input associated with output under test.
†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.

Minimum High Level
Input Voltage

Maximum Low Level
Input Voltage

Minimum High Level
Output Voltage

Maximum Low Level
Output Voltage

Maximum Input
Leakage Current

Maximum
3-State
Current

†Minimum Dynamic

Maximum Quiescent
Supply Current