Philips Semiconductors

Product specification

74F540, 74F541

Buffers

74F540 Octal Inverter Buffer (3-State)

74F541 Octal Buffer (3-State)

2

1990 Jan 08

853–0068 98494

FEATURES

(20

µA in High and Low states)

microprocessors

DESCRIPTION

The 74F540 and 74F541 are octal buffers that are ideal for driving

bus lines or buffer memory address registers. The outputs are

capable of sinking 64mA and sourcing up to 15mA, producing very

good capacitive drive characteristics. The devices feature input and

outputs on opposite sides of the package to facilitate printed circuit

board layout.

TYPE

TYPICAL

PROPAGATION DELAY

TYPICAL SUPPLY

CURRENT

(TOTAL)

74F540

3.5ns

58mA

74F541

5.5ns

55mA

ORDERING INFORMATION

DESCRIPTION

COMMERCIAL RANGE

PKG DWG #

20-Pin Plastic DIP

N74F540, N74F541N

SOT146-1

20-Pin Plastic SOL

N74F540D, N74F541D

SOT163-1

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS

DESCRIPTION

74F(U.L.)

HIGH/LOW

LOAD VALUE

HIGH/LOW

I0–I7

Data inputs

1.0/0.033

20

µA/20µA

OE0, OE1

3-State output enable inputs (active Low)

1.0/0.033

20

µA/20µA

Y0 - Y7

Data outputs (74F541)

750/106.7

15mA/64mA

Y0 - Y7

Data outputs (74F540)

750/106.7

15mA/64mA

NOTE: One (1.0) FAST Unit Load is defined as: 20

µA in the High state and 0.6mA in the Low state.

PIN CONFIGURATION – 74F540

20

19

18

17

16

15

14

13

12

10

11

9

8

7

6

5

4

3

2

1

OE1

Y0

Y1

Y4

Y5

Y6

Y7

OE0

I0

I1

I4

I5

I6

I7

GND

Y2

Y3

I3

I2

SF01060

PIN CONFIGURATION – 74F541

20

19

18

17

16

15

14

13

12

10

11

9

8

7

6

5

4

3

2

1

OE1

Y0

Y1

Y4

Y5

Y6

Y7

OE0

I0

I1

I4

I5

I6

I7

GND

Y2

Y3

I3

I2

SF01021