CD4050BM - 6-Channel CMOS Buffer, 3-18V | Texas Instruments
料号： CD4050BM ✗ 停产CD4050BM 概述
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.
直接替换替代料： CD4050BM ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： CD4050BM （相同外形与封装尺寸） ——差异在于 Mounting Type, Product Type, Technology.
CD4050BE
✅ 直接替换联系询价
查看数据手册 →MC14050BCPG
✅ 直接替换📋 参考替代料（不在目录中）
CD4050BM 最大额定值与电气特性
| 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 |
| 输出类型 | Push-pull |
| Supply Voltage Range | 3 V to 18 V |
| 引脚数 | 16 pins |
| 封装 | 16-SOIC |
| 安装类型 | 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 引脚配置
| 引脚 1 | A IN — Inverting channel A input |
| 引脚 2 | A OUT — Inverting channel A output |
| 引脚 3 | B IN — Inverting channel B input |
| 引脚 4 | B OUT — Inverting channel B output |
| 引脚 5 | C IN — Inverting channel C input |
| 引脚 6 | C OUT — Inverting channel C output |
| 引脚 7 | NC — No internal connection |
| 引脚 8 | VSS — Ground reference |
| 引脚 9 | NC — No internal connection |
| 引脚 10 | D OUT — Non-inverting channel D output |
| 引脚 11 | D IN — Non-inverting channel D input |
| 引脚 12 | E OUT — Non-inverting channel E output |
| 引脚 13 | E IN — Non-inverting channel E input |
| 引脚 14 | F OUT — Non-inverting channel F output |
| 引脚 15 | F IN — Non-inverting channel F input |
| 引脚 16 | VDD — Positive supply voltage |
典型应用
CD4050BM 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： CD4050BM ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Six channels with both logic polarities in one 16-SOIC package （对比 MC14050BCPG)
- Documented single-supply CMOS-to-DTL and CMOS-to-TTL conversion （对比 MC14050BCPG)
- Broad 3 V to 18 V operating range （对比 CD4050BE)
设计说明
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.
合规信息
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.
