1. General description
The 74HC7540; 74HCT7540 is an 8-bit inverting buffer/line driver with Schmitt-trigger inputs and
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. Schmitt trigger
inputs transform slowly changing input signals into sharply defined jitter-free output signals.
2. Features and benefits
• Wide supply voltage range from 2.0 to 6.0 V
• CMOS low power dissipation
• High noise immunity
• Unlimited input rise and fall times
• Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
• Inverting outputs
• Input levels:
• For 74HC7540: CMOS level
• For 74HCT7540: 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