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