CD4051BM - 8:1 CMOS Analog Multiplexer | Texas Instruments
MPN: CD4051BM ✓ Hoạt độngCD4051BM Tóm tắt
An analog multiplexer is a switch matrix that connects multiple inputs to a shared output, or conversely distributes one source across selected destinations. The demultiplexer function is selected electrically by connecting the appropriate terminals. In the broader semiconductor hierarchy, the CD4051BM belongs to CMOS logic ICs, analog switch ICs, multiplexers, and power-management-independent signal-routing components. Unlike a mechanical relay, it provides compact, logic-controlled channel selection, although its on-resistance and capacitance can affect signal fidelity.
The CD4051BM includes logic-level conversion, allowing the select inputs to be driven by compatible CMOS logic while the analog signal terminals operate within the device's specified supply and signal limits. Verified distributor data specifically lists the MPN as a 240 ohm, 8:1, single-circuit analog switch in a 16-SOIC package. Exact voltage, current, leakage, propagation-delay, bandwidth, and temperature values were not supplied in the verified dataset and are therefore marked as data needed rather than inferred.
The device is useful when a microcontroller must inspect several sensors, select one measurement path, route a reference signal, or connect an external test point to a shared converter. Selection logic determines the active channel, while the common terminal carries the selected signal. Engineers should account for on-resistance, off leakage, charge injection, supply decoupling, input voltage limits, and the package pinout before using it in precision or high-speed systems.
Typical uses include 8-channel sensor scanning, laboratory and industrial data acquisition, programmable instrumentation, audio or communications routing, and embedded measurement systems. The SOIC-16 footprint is convenient for conventional PCB assembly, but the exact pin names and electrical ratings must be confirmed from the manufacturer datasheet before layout or replacement work. This page combines verified manufacturer and distributor references with practical selection and sourcing guidance rather than assuming unprovided electrical values.
The primary design consideration is signal integrity: the selected channel's on-resistance and parasitic capacitance can form an RC network with the driven source and receiving circuit. Keep routing short, provide the required bypass capacitance, respect the logic levels, and verify analog input limits. For a replacement, use the same-package pinout and compare supply voltage, channel count, logic compatibility, on-resistance, leakage, and signal range before substitution.
This data page consolidates the verified CD4051BM identity, package, distributor classification, manufacturer datasheet link, sourcing context, and engineering guidance. It does not infer unavailable ratings or claim that a component is available unless the supplied distributor data explicitly indicates purchase or inventory status.
Bộ thay thế dễ dàng lắp đặt cho CD4051BM — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với CD4051BM (cùng hình factor và footprint) — khác nhau ở Mounting Type, Package, RoHS Status.
CD4051BE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →CD4051BM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →CD4051BE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →HCF4051BE
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
74HC4051
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
CD4051BM Tỷ lệ tối đa & tính chất điện
| Product Type | Single 8-channel CMOS analog multiplexer/demultiplexer |
| Multiplexer Configuration | 8:1 |
| Circuit Count | 1 circuit IC switch |
| On-State Resistance | 240 ohm |
| Logic-Level Conversion | Logic-level conversion |
| Hộp | 16-pin SOIC |
| Kiểu lắp đặt | Surface mount |
| Channel Count | 8 channels |
| Manufacturer | Texas Instruments |
| Trạng thái RoHS | unknown |
| REACH Status | unknown |
Hướng dẫn cấu hình chân CD4051BM 16-pin soic
Cấu hình chân cho CD4051BM (16-pin soic gói). IC số này bao gồm chân GPIO, giao diện truyền thông (UART, SPI, I2C) và chân nguồn. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết các chức năng chân thay thế và tùy chọn cấu hình. Cực kỳ quan trọng cho thiết kế hệ thống tích hợp và lập trình PCB.
Không có dữ liệu chân cụ thể sẵn có cho CD4051BM.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
CD4051BM phù hợp cho 6 Áp dụngs: 8-Channel Sensor Scanning, Programmable Test and Measurement, Industrial Data Acquisition, Laboratory Instrumentation, Analog Signal Routing, Embedded Control Systems.
8-Channel Sensor Scanning
The CD4051BM fits a microcontroller measurement front end that must scan several analog sensors through one shared ADC input. Its 8:1 topology reduces the number of analog connections, while the verified 240 ohm on-state resistance should be included in the source impedance calculation. Keep the sensor path short, use a high-impedance ADC input where appropriate, and verify the datasheet's leakage, bandwidth, and supply limits.
Được đề xuất
Programmable Test and Measurement
Use the CD4051BM to route selected test inputs, reference levels, or outputs into a common measurement channel in automated test equipment. The multiplexer reduces fixture wiring and lets a controller present different signals without a mechanical relay bank. Its 240 ohm resistance can create a divider with low-impedance sources, so calibrate the measurement path and use high-impedance buffering when attenuation would affect accuracy.
Được đề xuất
Industrial Data Acquisition
The CD4051BM can connect multiple field inputs to a shared signal-conditioning chain when the system uses compatible CMOS supply and logic levels. The 8-channel arrangement simplifies wiring and reduces analog fanout. Designers should protect inputs against transients, observe the manufacturer absolute maximum ratings, provide supply bypassing, and account for the 240 ohm channel resistance in sensor excitation and return-path calculations.
Được đề xuất
Laboratory Instrumentation
A laboratory instrument can use the CD4051BM to select among multiple sources, reference nodes, or monitored circuits without changing the front-end wiring. The compact 16-pin SOIC helps keep the routing network close to the measurement circuitry. For precision work, verify input bias current, leakage, charge injection, and on-resistance conditions in the manufacturer datasheet, because those values were not included in the supplied verified snippets.
Được đề xuất
Analog Signal Routing
The CD4051BM can route one selected low-frequency analog path among multiple destinations, such as filter inputs, amplifier stages, or output connectors. Its logic-level conversion supports controller-driven channel selection, while the 8:1 organization keeps the routing architecture simple. Check the package pinout, signal voltage range, and switching specifications before using it for high-frequency, precision, or isolation-sensitive applications.
Được đề xuất
Embedded Control Systems
The CD4051BM is useful in embedded systems where a controller must select one of eight external analog inputs, such as in a configurable control panel or automated equipment interface. Its CMOS implementation and logic-level conversion suit digital control systems, but the exact supply voltage and input thresholds must be confirmed. Use the three select lines from the manufacturer truth table and add pull resistors only when required by the selected interface.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho CD4051BM — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | CD4051BE | CD4051B | HCF4051BE | 74HC4051 |
|---|---|---|---|---|---|
| Package | 16-SOIC | 16-SOIC - verify exact suffix outline | 16-SOIC - verify exact package | 16-SOIC - verify exact suffix outline | 16-SOIC - verify exact suffix outline |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics | Texas Instruments |
| Multiplexer Configuration | 8:1 | 8:1 family function | 8:1 family function | 8:1 family function | 8:1 family function |
| Circuit Count | 1 circuit | 1 circuit | 1 circuit | 1 circuit | 1 circuit |
| Logic-Level Conversion | Yes | Verify exact datasheet | Verify exact datasheet | Verify exact datasheet | Verify exact datasheet |
| Channel Count | 8 channels | 8 channels | 8 channels | 8 channels | 8 channels |
Bảo phân biệt quan trọng
- Verified 240 ohm on-state resistance (vs74HC4051)
- Single 8-channel architecture (vsHCF4051BE)
- Logic-level conversion support (vsCD4051B)
- 16-SOIC integration (vsCD4051BE)
Ghi chú thiết kế
Treat the selected channel as a resistive RC network. Estimated only: with 240 ohm on resistance, a 1 kohm source and a 10 kohm load produce an idealized divider of 1 kohm / (1 kohm + 240 ohm + 10 kohm), but the real result also depends on capacitance and frequency. Keep traces short, use a high-impedance receiver when attenuation matters, and verify the manufacturer's switching and capacitance data.
Place the device near the analog source and destination so the selected path is not surrounded by long traces or switching-control nets. Maintain a continuous ground plane, decouple the supply close to the device, and route the three select signals away from sensitive analog inputs. The verified package is 16-SOIC, but the exact pin arrangement must be checked from the manufacturer datasheet before layout.
Do not assume that every 8:1 multiplexer is a drop-in replacement. First verify the 16-pin SOIC footprint and pin names, then compare supply voltage, logic thresholds, analog input limits, on resistance, leakage, bandwidth, and temperature range. The 240 ohm rating is verified for CD4051BM, but the alternatives' corresponding values are not supplied and must not be inferred.
Use the manufacturer-recommended supply bypassing and observe the exact supply and logic-input limits. The supplied data confirms logic-level conversion but does not state the valid supply range, so do not select bypass values or level-shifters from assumptions. Check startup behavior, unused-channel connections, and control states during reset to prevent unintended analog paths.
Thông tin tuân thủ
The supplied verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is marked not_applicable because the device is not identified as an automotive-qualified part in the supplied data.
