1. General description
The 74HC1G66; 74HCT1G66 is a single-pole, single-throw analog switch with two input/output
terminals (nY and nZ) and a digital enable input (nE). When nE is LOW, the analog switch is turned
off. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs
to voltages in excess of VCC.
The HCT device features control inputs with reduced input threshold levels to allow interfacing to
TTL logic levels.
2. Features and benefits
• Wide supply voltage range from 2.0 V to 10.0 V
• Very low ON resistance:
• 45 Ω (typ.) at VCC = 4.5 V
• 30 Ω (typ.) at VCC = 6.0 V
• 25 Ω (typ.) at VCC = 9.0 V
• High noise immunity
• CMOS low power dissipation
• Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
• Complies with JEDEC standards:
• JESD8C (2.7 V to 3.6 V)
• JESD7A (2.0 V to 6.0)
• ESD protection:
• HBM JESD22-A114E exceeds 2000 V
• MM JESD22-A115-A exceeds 200 V
• Specified from -40 °C to +85 °C and -40 °C to +125 °C