CD4051BE - 8:1 Analog Multiplexer, 240 Ohm, 16-PDIP | Texas Instruments
Teilenummer: CD4051BE ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $0.78 | $0,78 |
| 10 | $0.65 | $6,50 |
| 100 | $0.49 | $49,00 |
| 500 | $0.42 | $210,00 |
| 1.000 | $0.36 | $360,00 |
| 2.500 | $0.31 | $775,00 |
CD4051BE Übersicht
A CMOS analog multiplexer is an analog switch that selects one of N analog input channels and routes it to a single common output line, under control of digital select inputs. Multiplexers belong to the broader category of analog switches and multiplexers, which in turn sit within interface ICs and signal-conditioning components. The CD405xB family from Texas Instruments (originally designed by RCA) provides low-leakage, low-crosstalk switching for precision analog and audio signal paths, with logic-level translation between 3 V digital control and ±10 V analog rails.
Key features of the CD4051BE include matched switch characteristics with RON = 5 Ohm typical delta between channels at VDD-VEE = 15V, channel OFF leakage of ±100 pA typical at VDD-VEE = 18V, and very low quiescent power dissipation under all digital control input conditions. The device also offers low ON resistance of 125 Ohm typical, high OFF resistance, and logic-level translation enabling digital control from 3V CMOS logic while switching ±10V analog signals. The 16-pin PDIP through-hole package provides easy insertion into legacy breadboards and through-hole PCB designs.
The CD4051BE uses a CMOS architecture with break-before-make switching action, preventing momentary shorting between adjacent channels during channel transitions. The three binary select inputs (A, B, C) along with an active-low inhibit input provide 8 -to-1 multiplexing, while the bidirectional common pin (COM) allows the same device to operate as a 1-to-8 demultiplexer by reversing the role of input and output. This architecture is well suited to low-frequency precision analog signal routing where switch capacitance and leakage, not bandwidth, dominate the error budget.
Typical applications include analog signal routing in data acquisition systems, audio signal multiplexing in mixing consoles, sensor signal multiplexing in industrial instrumentation, automatic test equipment channel selection, and telecommunications line selection. The wide supply range allows direct interfacing to both 5V legacy analog systems and modern 3.3V digital controllers without level shifters.
When designing with this device, ensure that VEE is connected to ground or negative supply for unipolar operation, and provide adequate decoupling close to VDD and VEE pins. The inhibit pin (INH) should be tied to ground when not used, and select inputs (A, B, C) should not float - tie them to VDD or VSS through a defined logic level to prevent shoot-through current.
This page synthesizes distributor pricing, drop-in alternatives in the same 16-PDIP footprint, application-specific guidance for audio and sensor multiplexing, and design considerations not found in the manufacturer datasheet alone.
Drop-in-Alternativen für CD4051BE – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
CD4051BEG4
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
CD4051BE-EL
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
HCF4051BE
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
HEF4051BP
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC14051BCP
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MAX4617CPE
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
CD4051BE Technische Daten
| Funktion | 8:1 Analog Multiplexer / Demultiplexer |
| Configuration | 1 Circuit, 8:1 (Single Pole 8 Throw) |
| On-State Resistance (Ron) | 240 Ohm max |
| On-State Resistance (Ron) Typ | 125 Ohm at VDD-VEE = 15V |
| Channel-to-Channel RON Match (ΔRon) | 5 Ohm typ at VDD-VEE = 15V |
| Off-State Leakage | ±100 pA typ at VDD-VEE = 18V |
| Signal Input Range | 15 Vp-p min at VDD-VEE = 18V |
| Supply Voltage Range (Single) | 3 V to 20 V |
| Supply Voltage Range (Dual) | ±2.5 V to ±10 V |
| Betriebstemperatur | -55C to +125C |
| Gehäuse | 16-Pin PDIP (N) |
| Anzahl der Pins | 16 |
| Montageart | Through-Hole |
| Select Inputs | 3 (A, B, C) binary with INH inhibit |
| Switching Action | Break-before-make |
| Technology | CMOS |
| Quiescent Power Dissipation | Very low (under all digital control states) |
| RoHS-Status | Compliant |
| MSL-Level | 1 (unlimited) |
CD4051BE Pin-Konfiguration
| Pin 1 | INH — Inhibit input (active-low, ties to VSS to enable) |
| Pin 2 | Y0 — Analog I/O channel 0 |
| Pin 3 | A — Select input (LSB) |
| Pin 4 | Y1 — Analog I/O channel 1 |
| Pin 5 | Y2 — Analog I/O channel 2 |
| Pin 6 | B — Select input |
| Pin 7 | C — Select input (MSB) |
| Pin 8 | VSS — Digital logic ground |
| Pin 9 | VEE — Analog negative supply (or ground for unipolar) |
| Pin 10 | COM — Common analog I/O (bidirectional) |
| Pin 11 | Y3 — Analog I/O channel 3 |
| Pin 12 | Y4 — Analog I/O channel 4 |
| Pin 13 | Y5 — Analog I/O channel 5 |
| Pin 14 | Y6 — Analog I/O channel 6 |
| Pin 15 | Y7 — Analog I/O channel 7 |
| Pin 16 | VDD — Positive supply voltage |
Typische Anwendungen
CD4051BE ist geeignet für 6 Anwendungs: Data Acquisition Systems, Audio Signal Multiplexing, Industrial Sensor Multiplexing, Automatic Test Equipment (ATE), Telecommunications Line Selection, Battery Monitoring Systems.
Data Acquisition Systems
The CD4051BE fits 8-channel data acquisition front-ends because its 240 Ohm maximum on-resistance and 100 pA typical off-leakage produce <0.01% gain error when paired with 16-bit ADCs at source impedances below 5 kOhm. The bidirectional COM pin routes any of 8 analog inputs to a single sigma-delta or SAR ADC, dramatically reducing board area versus 8 individual ADCs. Operated from ±10V dual supplies, the multiplexer handles industrial sensor signals from thermocouples (10 mV full-scale) to strain-gauge bridges (1 V full-scale) without saturating, while 3.3V digital select inputs interface directly to modern microcontrollers without level shifters, lowering BOM cost.
Empfohlen
Audio Signal Multiplexing
In audio mixing consoles and home theater receivers, the CD4051BE routes 8 line-level audio sources to a single DAC or codec channel at one-per-bit-channel-error of <0.04 dB. The 125 Ohm typical on-resistance contributes negligible insertion loss to 10 kΩ-output audio sources, while the -55C to +125C operating range supports both consumer and automotive audio head units. Compared to electromechanical relays, the CD4051BE eliminates click-pop transients and offers 10000x faster switching (sub-microsecond versus millisecond relay engage), critical for click-free source changes. Its 3V to 20V supply range enables single 5V operation while passing ±5V bipolar audio waveforms.
Empfohlen
Industrial Sensor Multiplexing
For factory automation and process control, the CD4051BE switches among 8 thermocouple, RTD, or pressure-sensor inputs in programmable logic controllers (PLCs) at industrial -40C to +85C ambient with full -55C to +125C spec headroom. The 240 Ohm on-resistance is acceptable for sensor impedances below 1 kΩ, and the 100 pA leakage introduces less than 1 LSB error at 16-bit resolution with 250 mV full-scale signals. The wide 3V to 20V supply range enables operation from 24V industrial rails with simple linear regulation, while the 16-PDIP through-hole package simplifies hand-repair and field service of legacy PLC I/O modules still in production 20+ years after release.
Empfohlen
Automatic Test Equipment (ATE)
In bench-top and production ATE, the CD4051BE serves as a low-cost pin-switching matrix to route test signals to DUT pins under MCU control, replacing expensive electromechanical relays and saving 5-10x BOM cost per channel. The 125 Ohm typical on-resistance contributes predictable error that can be calibrated out in software, while the ±100 pA off-leakage ensures leakage tests see only the device-under-test contribution, not the multiplexer. The 16-PDIP package provides easy socket-replacement during test fixtures, and the 3V to 20V supply range allows direct interfacing to TTL, CMOS, and bipolar analog test sources from a single board revision.
Empfohlen
Telecommunications Line Selection
In PBX systems, telephone line cards, and older DSLAM designs, the CD4051BE selects among 8 subscriber lines for codec routing, ring detection, or test access switching with 240 Ohm on-resistance acceptable for 600-ohm audio interfaces. The break-before-make switching prevents momentary shorts during channel transitions that would otherwise cause cross-talk bursts in adjacent channels, while the 100 pA leakage is far below the off-hook line current specifications. The 3V to 20V supply range matches both legacy 48V battery-feed systems and modern 3.3V codec logic, enabling one PCB design across product generations.
Empfohlen
Battery Monitoring Systems
For multi-cell battery packs in UPS systems, e-bikes, and 48V telecom battery banks, the CD4051BE selects among 8 battery cell voltages for monitoring with 100 pA off-leakage critical to preserving battery standby life. The 240 Ohm on-resistance produces only 0.01% voltage drop at 1 mA monitoring current, while the bidirectional COM pin enables either cell-to-ADC routing or cell-balancing current injection. The wide 3V to 20V supply range accommodates 4S to 16S lithium battery packs without additional power conversion. Compared to dedicated battery monitor ICs, the CD4051BE provides a 10x cost reduction at the expense of needing an external ADC, but is acceptable for non-automotive battery packs where cost dominates precision.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für CD4051BE – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | CD4051BEG4 | HCF4051BE | HEF4051BP | MC14051BCP |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | STMicroelectronics | NXP Semiconductors | onsemi |
| Package | 16-PDIP (N) | 16-PDIP (N) - same | 16-PDIP (N) - same | 16-PDIP (N) - same | 16-PDIP (N) - same |
| Configuration | 8:1 (Single Pole 8 Throw) | 8:1 | 8:1 | 8:1 | 8:1 |
| On-State Resistance (Ron) Max | 240 Ohm | 240 Ohm | 240 Ohm | 240 Ohm | 280 Ohm |
| On-State Resistance (Ron) Typ at VDD-VEE=15V | 125 Ohm | 125 Ohm | 125 Ohm | 125 Ohm | 175 Ohm |
| Supply Voltage Range | 3V to 20V single / ±2.5V to ±10V dual | 3V to 20V / ±2.5V to ±10V | 3V to 20V / ±2.5V to ±10V | 3V to 20V / ±2.5V to ±10V | 3V to 18V / ±3V to ±9V |
| Operating Temperature | -55C to +125C | -55C to +125C | -55C to +125C | -40C to +85C | -55C to +125C |
Wichtigste Unterscheidungsmerkmale
- Widest supply voltage range in its class (vs. CD74HC4051)
- Multi-source availability across 4 major manufacturers (vs. Single-source newer muxes like TMUX4051)
- Through-hole package for legacy and field-serviceable designs (vs. TMUX4051 (QFN/TSSOP only))
- Bidirectional COM pin enables demultiplexer mode (vs. Unidirectional switches)
Designhinweise
Decouple VDD and VEE pins with 100 nF ceramic capacitors placed within 5 mm of the device pins. For dual-supply operation (analog signals crossing zero), connect VEE to a clean negative rail; for unipolar operation with signals above ground, tie VEE to VSS (digital ground). If using only +5V single supply, the analog signal range is restricted to 0V to 5V; connect VSS and VEE both to system ground to enable this configuration. Adding a 10 uF tantalum bulk capacitor near VDD improves transient response during simultaneous channel switching of multiple loads.
Keep analog signal traces short and away from digital select lines (A, B, C, INH) to minimize capacitive coupling. Route the COM pin directly to the destination amplifier or ADC input, using a guard trace tied to VSS to reduce leakage on high-impedance sources. Place the device away from switching power converters and high-frequency digital clocks; if placed on a mixed-signal PCB, use a ground split between VSS (digital ground) and VEE (analog ground or negative supply) with a single-point connection at the power supply to prevent ground-loop noise injection into analog channels.
The CD4051BE is NOT a rail-to-rail analog switch - at VDD = 5V, analog signals are typically limited to within 1.5V of each rail to maintain low Ron. For signals near the rails, increase VDD to 10V or 15V to extend linear range. Off-state channel isolation typically exceeds 50 dB at 1 kHz but degrades above 100 kHz; for RF multiplexing above 1 MHz, consider the TI TS3A4751 or Maxim MAX4634 instead. The 240 Ohm Ron introduces a gain error that scales with source impedance - buffer high-impedance sources (>10 kΩ) with an op-amp follower to prevent signal-dependent distortion.
Never leave select inputs (A, B, C) floating - they will drift to intermediate voltages and cause shoot-through current through both logic and switch stages. Tie unused select inputs directly to VDD or VSS through a 100 kΩ resistor. The INH pin MUST be tied to VSS (ground) for normal operation; floating INH enables the device randomly. Do not exceed the absolute maximum ratings of 20V on VDD or 0V on VEE; applying signals beyond VDD/VEE causes latch-up. Verify the analog signal range never exceeds VDD or drops below VEE - clamping diodes are minimal.
Compliance-Informationen
CD4051BE is RoHS-compliant per TI product page. For AEC-Q100 automotive qualified version, consider CD4051BQPWRQ1 (TSSOP-16 surface mount). All CD4000-series second sources (HCF4051BE, HEF4051BP, MC14051BCP) carry equivalent lead-free and RoHS compliance.
