CD4051BCM Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
CD4051BCM is an 8-channel single-ended analog multiplexer/demultiplexer IC with 40 dB off-state isolation, 400 Ω maximum on-resistance, and a 16-pin SOIC package from Texas Instruments. Available from stock worldwide.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD4051BCM Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-channel single-pole analog switch supporting both multiplexer and demultiplexer operation from a single IC
- 40 dB off-state channel isolation and 10 Ω typical on-resistance match enabling low-distortion analog signal routing
- Wide supply voltage range from 3 V to 15 V compatible with CMOS, TTL, and analog signal levels on the same board
- 16-pin SOIC package (R-PDSO-G16) enabling compact PCB layout for multi-channel data acquisition front-ends
Applications
The CD4051BCM is widely used in data acquisition systems, audio signal routing, and analog instrumentation where multiple sensor or signal sources must be time-multiplexed to a single ADC or signal chain. It is a natural fit for 8-channel thermocouple scanners, pH/conductivity measurement instruments, and automated test equipment switching networks requiring low-leakage analog channel selection. The wide 3 V to 15 V supply range also suits battery-powered handheld testers and mixed-signal prototyping platforms.
Specifications
| YTEOL | 0 |
| Additional Feature | LG-MAX |
| Analog IC - Other Type | SINGLE-ENDED MULTIPLEXER |
| JESD-30 Code | R-PDSO-G16 |
| Normal Position | NO |
| Number of Channels | 8 |
| Number of Functions | 1 |
| Off-state Isolation-Nom | 40dB |
| On-state Resistance Match-Nom | 10Ω |
| On-state Resistance-Max (Ron) | 400Ω |
| Output | COMMON OUTPUT |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 15V |
| Supply Voltage-Min (Vsup) | 5V |
| Supply Voltage-Nom (Vsup) | 10V |
| Surface Mount | YES |
| Switch-off Time-Max | 420ns |
| Switch-on Time-Max | 1200ns |
| Switching | BREAK-BEFORE-MAKE |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for CD4051BCM:
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Frequently Asked Questions
How many analog channels does CD4051BCM select and what control logic does it use to address each channel?
The CD4051BCM routes 1-of-8 analog channels using a 3-bit binary address on pins A, B, and C, plus an active-low enable (INH) pin. All 8 channels are bidirectional, so the same 3-bit select code works for both multiplexing 8 inputs to 1 output and demultiplexing 1 input to 8 outputs, making it flexible for both ADC scanning and DAC distribution applications.
What on-resistance and isolation specs does CD4051BCM offer, and are they adequate for audio signal switching?
The CD4051BCM specifies a maximum on-resistance of 400 Ω and typical channel-to-channel isolation of 40 dB at 1 kHz. For line-level audio switching at signal levels above 100 mV into load impedances above 10 kΩ, the 400 Ω on-resistance introduces less than 4% voltage error, making it acceptable in non-precision audio routing where low insertion loss and THD are not critical.
Which supply voltage range does CD4051BCM support for mixed 5 V digital and higher-voltage analog applications?
The CD4051BCM operates from a single supply of 3 V to 15 V or with split supplies up to +/- 7.5 V, allowing analog signals that swing both above and below ground to be switched. This makes it directly usable in 5 V CMOS digital systems as well as 12 V analog instrumentation, with the control inputs remaining TTL/CMOS compatible across the full supply range.
For an 8-channel temperature scanner design, what sample rate limitation does CD4051BCM introduce at the ADC input?
The CD4051BCM has a typical channel switching time of around 300 ns at 5 V supply, so it can support ADC sampling rates up to approximately 1 Msps per channel when all 8 channels are scanned in sequence. For slower 12-bit to 16-bit ADCs operating at 100 ksps, the switch settling time is negligible, making the CD4051BCM well suited for 8-channel thermocouple or RTD scanning with 16-pin SOIC area efficiency.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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