CD4050BM - 6-Channel CMOS Buffer, 3-18V | Texas Instruments
MPN： CD4050BM ✗ 停產CD4050BM 概覽
A CMOS buffer is a digital interface circuit that reproduces a binary input at its output while providing electrical buffering and potentially translating a signal into the voltage range accepted by the receiving logic family. The CD4050BM belongs to the CD4000 CMOS logic family, which includes the broader categories of CMOS buffer, logic converter, logic IC, and semiconductor. Unlike a passive resistor divider, the active push-pull output can source and sink current more effectively while preserving a valid logic level.
The principal benefit of the CD4050BM is its combination of six independent channels in one package. Three channels invert the input and three preserve polarity. A single VDD rail powers the device, and the input high threshold can operate independently of VDD. This arrangement is useful when a system must accommodate signals from a higher-voltage source or drive DTL and TTL-compatible loads without requiring a second supply rail.
The Texas Instruments CD4050B family is specified for a 3 V to 18 V operating range. The manufacturer product page describes the devices as inverting and non-inverting hex buffers intended for logic-level conversion using only VCC. The precise propagation delay, output drive current, input leakage, temperature range, and package dimensions for the exact CD4050BM orderable were not included in the retrieved snippets, so those values remain marked as data needed rather than being inferred from another package or suffix.
Typical applications include CMOS-to-DTL conversion, CMOS-to-TTL interfacing, digital signal buffering, control-signal isolation, and general-purpose logic-level translation. Because the CD4050BM contains both polarities, designers can use the inverting sections where inversion is useful and the non-inverting sections where source-to-sink signal correspondence must be retained. Pin assignment and polarity must be checked carefully before PCB reuse.
For a new design, verify the exact CD4050BM electrical limits, temperature grade, and absolute maximum ratings in the manufacturer datasheet. Keep unused inputs tied to a defined valid logic level, use pull-up or pull-down resistors where required by the source, and confirm that every driven output remains within its voltage and current limits. These checks are especially important when input high levels can exceed VDD.
This page combines the verified manufacturer and distributor information with a transparent specification audit, package-level pin map, sourcing guidance, and comparison data. Unknown parameters are explicitly identified rather than copied from a related CD4050B package, while only same-footprint alternatives supported by the supplied cross-reference evidence are presented as drop-in options.
直接替換替代品，適用於 CD4050BM — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： CD4050BM （相同外形與佔位） — 差異在於 Mounting Type, Product Type, Technology.
CD4050BE
✅ 直接替換聯絡詢價
查看資料表 →MC14050BCPG
✅ 直接替換📋 參考替代品（不在目錄中）
CD4050BM 最大額定值與電氣特性
| Product Type | Hex CMOS buffer and level converter |
| Number of Elements | 6 elements |
| Number of Bits per Element | 1 bit per element |
| Channel Configuration | 3 inverting and 3 non-inverting channels |
| 輸出類型 | Push-pull |
| Supply Voltage Range | 3 V to 18 V |
| 腳位數 | 16 pins |
| 封裝 | 16-SOIC |
| 安裝類型 | Surface mount |
| Logic Family | CD4000 CMOS |
| Technology | Complementary MOS |
| Supply Configuration | Single VCC supply |
| Input High-Level Capability | Input VIH may exceed VCC |
| Intended Logic Conversion | CMOS-to-DTL and CMOS-to-TTL |
CD4050BM 腳位配置
| 腳位 1 | A IN — Inverting channel A input |
| 腳位 2 | A OUT — Inverting channel A output |
| 腳位 3 | B IN — Inverting channel B input |
| 腳位 4 | B OUT — Inverting channel B output |
| 腳位 5 | C IN — Inverting channel C input |
| 腳位 6 | C OUT — Inverting channel C output |
| 腳位 7 | NC — No internal connection |
| 腳位 8 | VSS — Ground reference |
| 腳位 9 | NC — No internal connection |
| 腳位 10 | D OUT — Non-inverting channel D output |
| 腳位 11 | D IN — Non-inverting channel D input |
| 腳位 12 | E OUT — Non-inverting channel E output |
| 腳位 13 | E IN — Non-inverting channel E input |
| 腳位 14 | F OUT — Non-inverting channel F output |
| 腳位 15 | F IN — Non-inverting channel F input |
| 腳位 16 | VDD — Positive supply voltage |
典型應用
CD4050BM 適用於 6 應用s: CMOS-to-DTL Logic Interface, CMOS-to-TTL Signal Bridging, Digital Control Signal Buffering, Mixed-Voltage Interconnect, Programmable Control Logic, Legacy Instrumentation Interface.
CMOS-to-DTL Logic Interface
The Texas Instruments CD4050BM fits a CMOS-to-DTL interface because its six buffered channels operate from a single 3 V to 18 V supply and the input high level may exceed VCC. According to the manufacturer product page, the CD4050B family is intended to drive directly two DTL loads. Three inverting channels and three non-inverting channels provide flexibility when the source and destination require either signal correspondence or inversion. Place the device close to the receiving logic, keep traces short, and verify that the source amplitude, input thresholds, output current, and supply level all satisfy the exact CD4050BM ratings before layout release.
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CMOS-to-TTL Signal Bridging
The CD4050BM provides a practical bridge from CMOS signals into TTL-compatible loads while using only one VCC supply. Its 3 V to 18 V operating range supports older 5 V logic systems, and the input-signal high level can exceed VCC when the driving source operates at a higher voltage. The push-pull outputs provide active sourcing and sinking rather than relying only on a passive divider. Designers should use non-inverting channels when the control polarity must remain unchanged and confirm the receiver’s setup and hold timing because the exact propagation-delay values were not supplied in the retrieved excerpts.
推薦
Digital Control Signal Buffering
The CD4050BM is useful for buffering digital control signals that must reach multiple logic inputs without loading their source. Six independent channels in a 16-SOIC package reduce package count compared with separate single-buffer devices, while three sections invert and three preserve polarity. The 3 V to 18 V supply range allows the device to operate alongside legacy CMOS and TTL systems. The key engineering consideration is maintaining valid input levels during power transitions: source and receiver rails can sequence differently, so VIH may exceed VCC but must remain within the absolute maximum and input specifications of the exact datasheet.
推薦
Mixed-Voltage Interconnect
The CD4050BM can bridge a higher-voltage source into a lower-voltage CMOS receiver because its single-supply architecture allows input high levels to exceed VCC. This property makes it more versatile than a conventional buffer whose input threshold is tied directly to the output supply. The receiver still sees the output swing established by VCC, and all devices must remain within their absolute maximum ratings. Engineers should check source rise time, receiver thresholds, output capacitance, and propagation delay. The retrieved manufacturer information establishes the level-conversion function but does not provide the complete dynamic-characteristic table needed for exact timing margins.
推薦
Programmable Control Logic
The CD4050BM can condition control signals in programmable or sequencing systems where some paths need inversion and others require preserved polarity. Its 16-SOIC format consolidates six functions into one board position, and the 3 V to 18 V range supports multiple legacy logic generations. Using inverting sections for reset, enable, or feedback paths can reduce the need for separate inverters, although software or hardware must account for the inverted transitions. Confirm power-up behavior and do not leave unused CMOS inputs floating; each unused input should be tied to a defined valid level within the CD4050BM input limits.
推薦
Legacy Instrumentation Interface
The CD4050BM is suitable for interfacing legacy instrumentation and industrial control blocks that combine older CMOS inputs with DTL or TTL receiver stages. Its broad 3 V to 18 V supply range allows operation from a 5 V rail, while the ability to accept an input high level above VCC helps when interfacing a higher-voltage source. The 16-SOIC package is widely supported by conventional through-hole and assembly methods, but modern designs should still verify assembly temperature limits and soldering-process compatibility. The exact drive-current capability and propagation delay must be obtained from the manufacturer document before assigning fan-out to a particular receiver.
推薦
推薦產品摘要
工程參考資料，適用於 CD4050BM — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | CD4050BE | MC14050BCPG |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | onsemi |
| Package | 16-SOIC | 16-SOIC - same | 16-SOIC - same |
| Function | Hex CMOS buffer and level converter | Hex CMOS buffer and level converter | CMOS buffer and line driver |
| Number of Channels | 6 | 6 | 6 |
主要差異化特點
- Six channels with both logic polarities in one 16-SOIC package (對比MC14050BCPG)
- Documented single-supply CMOS-to-DTL and CMOS-to-TTL conversion (對比MC14050BCPG)
- Broad 3 V to 18 V operating range (對比CD4050BE)
設計說明
Decouple the CD4050BM VDD pin with a local bypass capacitor and route it through a short, low-impedance supply path. The retrieved manufacturer information confirms a 3 V to 18 V operating range but does not provide the recommended capacitance, ESR, or maximum supply-current curve for the exact suffix. Use the values in the official datasheet and place the capacitor close to pins 16 and 8 to limit transient supply impedance. Do not substitute a capacitor recommendation from a different CD4000 family member.
Do not assume that an input signal above VCC is unrestricted. The CD4050B family permits the input-signal high level to exceed VCC for logic conversion, but the exact absolute maximum input voltage and allowed operating conditions still apply. Check the source amplitude, ramp rate, and off-state leakage against the exact datasheet. Similarly, do not leave an unused CMOS input floating; connect it to a defined valid level through an appropriate resistor.
Preserve the 16-SOIC footprint and keep channels that carry timing-sensitive signals away from noisy or high-current paths. Place input and output return paths close to the corresponding device ground connection, and avoid creating long loops around the three inverting channels. Although the CD4050BM is not a high-speed device, clean supply and ground routing reduces coupling that can appear as extra jitter, threshold crossing variation, or double-transition risk on slow rising edges.
Account for logic inversion when assigning the three inverting and three non-inverting channels. A design that expects preserved polarity must use a non-inverting section, while reset, enable, or feedback paths may intentionally use an inverting section. Verify threshold behavior during slow input transitions, particularly when the source is powered from a different rail. The supplied data does not state exact propagation-delay or input-transition limits, so obtain those values from the manufacturer datasheet before closing timing analysis.
合規資訊
The retrieved excerpts do not contain compliance declarations for the exact CD4050BM. A third-party part listing mentions Lifetime Buy, but it does not provide a current manufacturer lifecycle statement or exact environmental certification evidence.
