74HC540; 74HCT540

Octal buffer/line driver; 3-state; inverting

Rev. 6 — 19 October 2021

Product data sheet

1. General description

The 74HC540; 74HCT540 is an 8-bit inverting buffer/line driver with 3-state outputs. The device

features two output enables (OE1 and OE2). A HIGH on OEn causes the outputs to assume a

high-impedance OFF-state. Inputs include clamp diodes. This enables the use of current limiting

resistors to interface inputs to voltages in excess of VCC.

2. Features and benefits

• Wide supply voltage range from 2.0 V to 6.0 V

• CMOS low power dissipation

• High noise immunity

• Latch-up performance exceeds 100 mA per JESD 78 Class II Level B

• Inverting outputs

• Input levels:

• For 74HC540: CMOS level

• For 74HCT540: TTL level

• Complies with JEDEC standards

• JESD8C (2.7 V to 3.6 V)

• JESD7A (2.0 V to 6.0 V)

• ESD protection:

• HBM JESD22-A114F exceeds 2000 V

• MM JESD22-A115-A exceeds 200 V

• Multiple package options

• Specified from -40 °C to +85 °C and from -40 °C to +125 °C

3. Ordering information

Table 1. Ordering information

Package

Type number

Temperature range Name

Description

Version

74HC540D

74HCT540D

-40 °C to +125 °C

SO20

plastic small outline package; 20 leads;

body width 7.5 mm

SOT163-1

74HC540DB

74HCT540DB

-40 °C to +125 °C

SSOP20

plastic shrink small outline package; 20 leads;

body width 5.3 mm

SOT339-1

74HC540PW

74HCT540PW

-40 °C to +125 °C

TSSOP20

plastic thin shrink small outline package; 20 leads;

body width 4.4 mm

SOT360-1