1. General description

The 74HC4051; 74HCT4051 is a single-pole octal-throw analog switch (SP8T) suitable for use in

analog or digital 8:1 multiplexer/demultiplexer applications. The switch features three digital select

inputs (S0, S1 and S2), eight independent inputs/outputs (Yn), a common input/output (Z) and a

digital enable input (E). When E is HIGH, the switches are turned off. 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 analog input voltage range from -5 V to +5 V

• CMOS low power dissipation

• High noise immunity

• Complies with JEDEC standards

• JESD8C (2.7 V to 3.6 V)

• JESD7A (2.0 V to 6.0 V)

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

• Low ON resistance:

• 80 Ω (typical) at VCC - VEE = 4.5 V

• 70 Ω (typical) at VCC - VEE = 6.0 V

• 60 Ω (typical) at VCC - VEE = 9.0 V

• Logic level translation: to enable 5 V logic to communicate with ±5 V analog signals

• Typical ‘break before make’ built-in

• ESD protection:

• HBM: ANSI/ESDA/Jedec JS-001 Class 2 exceeds 2000 V

• CDM: ANSI/ESDA/Jedec JS-002 Class C3 exceeds 1000 V

• Multiple package options

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

3. Applications

• Analog multiplexing and demultiplexing

• Digital multiplexing and demultiplexing

• Signal gating