Logic Gates | MM74HC540

Inverting Octal 3-STATE Buffers

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CAD Model

Overview

The MM74HC540 and MM74HC541 3-STATE buffers utilize advanced silicon-gate CMOS technology. They possess high drive current outputs which enable high speed operation even when driving large bus capacitances. These circuits achieve speeds comparable to low power Schottky devices, while retaining the advantage of CMOS circuitry, i.e., high noise immunity, and low power consumption. Both devices have a fanout of 15 LS-TTL equivalent inputs. The MM74HC540 is an inverting buffer and the MM74HC541 is a non-inverting buffer. The 3-STATE control gate operates as a two-input NOR such that if either G1# or G2# are HIGH, all eight outputs are in the high-impedance state. In order to enhance PC board layout, the MM74HC540 and MM74HC541 offers a pinout having inputs and outputs on opposite sides of the package. All inputs are protected from damage due to static discharge by diodes to VCC and ground.

  • This product is general usage and suitable for many different applications.
  • Typical propagation delay: 12 ns
  • 3-STATE outputs for connection to system buses
  • Wide power supply range: 2-6V
  • Low quiescent current: 80 µA maximum (74HC Series)
  • Output current: 6 mA

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CAD Models

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Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

Type

Channels

VCC Min (V)

VCC Max (V)

tpd Max (ns)

IO Max (mA)

Pricing ($/Unit)

MM74HC540MTCX

Active

CAD Model

Pb

A

H

P

TSSOP-20

9.48

1

260

REEL

2500

N

Buffer

8

2

6

12

7.8

$0.3196

More Details

MM74HC540WM

Active

CAD Model

Pb

A

H

P

SOIC-20W

751D-05

3

260

TUBE

38

N

Buffer

8

2

6

12

7.8

$0.4652

More Details

MM74HC540WMX

Active

CAD Model

Pb

A

H

P

SOIC-20W

751D-05

3

260

REEL

1000

N

Buffer

8

2

6

12

7.8

$0.4517

More Details

MM74HC540MTC

Lifetime

CAD Model

Pb

A

H

P

TSSOP-20

9.48

1

260

TUBE

75

N

Buffer

8

2

6

12

7.8

$0.3013

More Details

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