74F541 datasheet(2/10 Pages) PHILIPS

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Philips Semiconductors

Product specification

74F540, 74F541

Buffers

74F540 Octal Inverter Buffer (3-State)

74F541 Octal Buffer (3-State)

1990 Jan 08

853–0068 98494

FEATURES

• High impedance NPN base inputs for reduced loading

(20

µA in High and Low states)

• Low power, light bus loading

• Functionally similar to the 74F240 and 74F241

• Provides ideal interface and increases fan-out of MOS

microprocessors

• Efficient pinout to facilitate PC board layout

• Octal bus interface

• 3-State buffer outputs sink 64mA

• 15mA source current

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

VCC = 5V ±10%,

Tamb = 0°C to +70°C

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

µA/20µA

OE0, OE1

3-State output enable inputs (active Low)

1.0/0.033

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

VCC

OE1

OE0

GND

SF01060

PIN CONFIGURATION – 74F541

VCC

OE1

OE0

GND

SF01021

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