CD4051BM96

Overview
The Texas Instruments CD4051BM96 is a monolithic CMOS analog multiplexer/demultiplexer designed to handle both analog and digital signals. It integrates eight separate analog channels and features a single-pole, eight-throw (SP8T) switch configuration. The IC is ideal for applications that require channel selection in data acquisition systems, signal routing, and audio systems. It allows bidirectional signal flow, enabling seamless switching between input and output channels.

Key Features

* 8-channel multiplexer/demultiplexer (SP8T configuration)
* Bidirectional signal flow on all channels
* CMOS logic inputs for efficient digital control
* Wide supply voltage range: 3V to 20V
* Low ON resistance for minimal signal degradation
* High channel-to-channel isolation
* Low power consumption
* Rail-to-rail analog signal handling
* Supports TTL and CMOS control signals
* Inhibit input for disabling all channels

Applications

* Signal multiplexing in data acquisition systems
* Audio signal routing in sound systems
* Analog-to-digital and digital-to-analog conversion input/output
* Channel switching in medical instrumentation
* Low-frequency analog signal multiplexing
* Test and measurement equipment
* Programmable sensor selection systems
* Microcontroller-based analog signal routing

Pin Configuration

* S1–S8 (Pins 1–5, 12–14): Analog signal input/output channels
* Z (Pin 3): Common I/O terminal
* A, B, C (Pins 9, 10, 11): Binary address inputs for selecting the active channel
* INH (Pin 6): Inhibit input that disables all switches when set HIGH
* VDD (Pin 16): Positive supply voltage
* VSS (Pin 8): Ground reference voltage
* VEE (Pin 7): Negative supply voltage (optional for full rail-to-rail analog signals)

Electrical Specifications

*Supply Parameters*

* Supply Voltage (VDD – VSS): 3 V to 20 V
* VEE Supply: Optional, for bipolar analog signals
* Input Voltage Range (Logic Inputs): 0 V to VDD
* Analog Input/Output Voltage Range: VEE to VDD (if VEE is used)

*Switch Characteristics*

* Typical ON Resistance (Ron):

* 125 Ω at VDD = 5 V
* 75 Ω at VDD = 10 V
* 50 Ω at VDD = 15 V
* Maximum ON Resistance Deviation (ΔRon): ±5 Ω (typical)
* Leakage Current (OFF state): ±0.1 µA at 25°C
* Channel-to-Channel Crosstalk: –50 dB typical at 1 MHz
* Capacitance (ON state): 15 pF typical

*Switching Characteristics (at VDD = 10 V, CL = 50 pF, TA = 25°C)*

* tON (Select to Channel ON Time): 200 ns typical
* tOFF (Inhibit to OFF Time): 100 ns typical
* Propagation Delay (tPLH/tPHL): ~150 ns typical

*Logic Input Parameters*

* Input Logic HIGH (VIH):

* ≥ 3.5 V at VDD = 5 V
* ≥ 7 V at VDD = 10 V
* Input Logic LOW (VIL):

* ≤ 1.5 V at VDD = 5 V
* ≤ 3 V at VDD = 10 V
* Input Current (IIN): ±0.1 µA max

*Power Consumption*

* Quiescent Current (IDD):

* Typically < 1 µA at VDD = 5 V
* Max 10 µA at full temperature range
* Dynamic Power Dissipation: Negligible due to CMOS construction

Operating Conditions

* Operating Temperature Range: –55°C to +125°C
* Storage Temperature Range: –65°C to +150°C
* Junction-to-Ambient Thermal Resistance (θJA): ~73 °C/W for SOIC-16 package
* Moisture Sensitivity Level (MSL): Level 1 – no special storage precautions necessary

Advantages

* Low ON resistance ensures minimal signal loss when the switch is active
* Low power consumption, making it ideal for battery-powered systems
* Can handle both analog and digital signals
* Supports bidirectional switching with high isolation between channels
* Versatile control with TTL/CMOS compatible inputs
* Compact and easy to integrate into a variety of designs
* Can be used for both unipolar and bipolar analog signals when VEE is connected

Conclusion
The CD4051BM96 from Texas Instruments is a highly versatile and reliable analog multiplexer with a broad range of applications. Whether used for analog signal routing in sensor systems, audio signal switching, or data acquisition, its high performance, low power consumption, and flexibility make it a popular choice for designers needing efficient and cost-effective signal management. With its low ON resistance, high isolation, and robust design, the CD4051BM96 is a powerful solution for handling multiple analog signals in a variety of applications.