MC34119P - 2-16V Mono Class AB Audio Amp | NXP
料号： MC34119P ✗ 停产MC34119P 概述
An audio amplifier IC is a semiconductor that accepts a small audio signal and delivers enough voltage and current to drive a loudspeaker or other audio transducer. A Class AB amplifier combines the low crossover distortion of class-A operation with improved efficiency compared with a continuously biased class-A stage. In the MC34119P, differential speaker outputs are intended to maximize output swing at low supply voltages, making the device especially relevant to compact telephone and communications equipment.
The MC34119P operates from 2.0 V to 16 V, as documented in the retrieved manufacturer and distributor information. Its typical quiescent supply current is 2.7 mA for battery-powered designs, while shutdown reduces the typical quiescent current to 65 µA. A chip-disable input provides a direct means of placing the amplifier in its low-power state. These features allow the amplifier to remain useful when system power is constrained by a telephone line or battery source.
Its architecture uses one Class AB output channel and differential speaker outputs rather than a conventional single-ended output arrangement. Differential drive can provide greater useful voltage swing into the speaker for a given supply, which is important at the 2 V minimum supply. This is a system-level advantage in speakerphone products where loudness and battery efficiency must coexist. Exact continuous output power, output impedance, gain settings, and distortion limits were not included in the retrieved source snippets and must be confirmed in the full manufacturer datasheet before final design sign-off.
Typical uses include telephone speakerphones, telephone-line powered communications products, small intercom stations, compact voice monitors, and portable low-voltage audio equipment. The device is also suitable where standby consumption matters, because the shutdown function can isolate the amplifier from the active signal path. For these applications, the 2 V minimum operating voltage and differential output capability align particularly well with low-power, single-speaker systems.
The primary design consideration is output-device and load compatibility. Engineers should verify speaker impedance, output power at the available supply voltage, thermal conditions, gain configuration, bypass capacitors, and shutdown logic against the complete MC34119 datasheet. Because the supplied text identifies an 8-DIP footprint but does not enumerate individual terminal functions, the pin assignment and exposed circuit details should not be inferred solely from this page.
This product page consolidates the verified MC34119P package, voltage, topology, shutdown, and low-power information with practical application guidance, sourcing considerations, and honest drop-in replacement analysis. Its key value is separating confirmed MC34119P characteristics from unverified specifications and avoiding unsupported claims about substitutes that may require different EMI performance or pin behavior.
直接替换替代料： MC34119P ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MC34119P 最大额定值与电气特性
| Product Type | Low Power Audio Amplifier IC |
| Amplifier Class | Class AB |
| Number of Channels | 1 channel (mono) |
| Supply Voltage Range | 2 V to 16 V |
| 输出配置 | Differential speaker outputs |
| Typical Quiescent Supply Current | 2.7 mA |
| Typical Power-Down Quiescent Current | 65 µA |
| Shutdown Control | Chip-disable input |
| 封装 | 8-DIP (0.300 inch, 7.62 mm) |
| Package Type | Through-hole DIP |
| 安装类型 | Through-hole |
| Packaging | Tube |
MC34119P through-hole dip 引脚配置指南
MC34119P（through-hole dip 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： MC34119P.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC34119P 适用于 6 应用s: Telephone Speakerphone, Battery-Powered Voice Monitor, Telephone-Line Powered Intercom, Portable Audio Notification Device, Industrial Call-Box Speaker, Small Communication Speaker Node.
Telephone Speakerphone
The MC34119P fits telephone speakerphones because its differential speaker outputs are intended to maximize output swing at the 2 V minimum supply voltage. The device can be placed between the voice-path signal and a telephone-line-powered or battery-backed speaker stage without requiring a high-voltage rail. Its 2.7 mA typical quiescent current supports continuous operation, while the 65 µA shutdown state can reduce consumption when the line is idle. Designers should still verify speaker impedance, allowed output power, and the complete signal-path gain against the manufacturer datasheet before production release.
推荐
Battery-Powered Voice Monitor
The MC34119P is appropriate for a compact battery-powered voice monitor where a mono Class AB stage must operate from a low supply. Its operating range of 2 V to 16 V allows integration with low-voltage analog and telephone circuits, and the 2.7 mA typical quiescent current limits the penalty of keeping the amplifier active. Designers can use the chip-disable input during idle periods, reaching the documented 65 µA typical power-down current. Battery-life calculations should use the worst-case load, supply, and temperature conditions from the complete datasheet rather than typical values alone.
推荐
Telephone-Line Powered Intercom
The MC34119P is suited to telephone-line powered intercoms because the amplifier starts operating at only 2.0 V and is designed around differential speaker outputs for low-voltage swing improvement. This topology can provide a more useful speaker drive than a single-ended arrangement at the same available supply. Its shutdown input allows the output stage to remain disabled during line inactivity, reducing the typical quiescent demand to 65 µA. The final design must confirm line transient protection, speaker impedance, and ringing-interface isolation because those requirements are outside the verified MC34119P excerpts.
推荐
Portable Audio Notification Device
The MC34119P can serve as the mono speaker driver in a portable notification device that emphasizes low-voltage operation and low standby demand. Its Class AB architecture, 2 V to 16 V supply capability, and differential outputs are compatible with compact single-speaker products such as paging units, portable call indicators, or compact status annunciators. The 2.7 mA typical active quiescent current is useful for battery planning, while shutdown provides a lower-power state when no announcement is active. Audio quality and maximum volume must be checked against the supported speaker load and available supply.
推荐
Industrial Call-Box Speaker
The MC34119P is suitable for a low-voltage industrial call-box speaker where a single audible voice channel and efficient standby operation are more important than stereo output. Its 2 V minimum operating voltage supports compact telephone-derived power systems, and the differential speaker outputs can improve usable swing under low-supply conditions. The chip-disable input permits shutdown during unattended periods, reducing the typical quiescent current to 65 µA. For industrial deployment, engineers should verify ingress protection, temperature range, transient immunity, and the output stage's behavior with long speaker wiring.
推荐
Small Communication Speaker Node
The MC34119P can be used in a compact communication speaker node that carries a mono voice signal from a telephone or communications link. Its low-power Class AB topology and 2 V to 16 V supply range support space-constrained boards, while differential outputs are tailored to low-voltage speaker operation. The documented shutdown feature allows the amplifier to be disabled when the communications path is inactive, improving system-level power management. Before layout release, confirm the exact 8-DIP pin functions, required input and output bypass components, speaker impedance, and maximum distortion at the intended output level.
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推荐产品汇总
工程参考数据： MC34119P ——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 | MC34119D |
|---|---|---|
| Package | 8-DIP (0.300 inch, 7.62 mm) | 8-DIP (0.300 inch, 7.62 mm) |
| Brand | NXP Semiconductors | NXP Semiconductors |
| Amplifier Class | Class AB | Class AB |
| Number of Channels | 1 channel (mono) | 1 channel (mono) |
| Supply Voltage Range | 2 V to 16 V | 2 V to 16 V |
| Output Configuration | Differential speaker outputs | Differential speaker outputs |
| Typical Quiescent Supply Current | 2.7 mA | 2.7 mA |
| Typical Power-Down Quiescent Current | 65 µA | 65 µA |
| Shutdown Control | Chip-disable input | Chip-disable input |
关键差异点
- Differential output supports higher low-voltage swing （对比 NJM2113)
- Lower-voltage operating capability （对比 NJM2113)
- Documented low-power shutdown state （对比 NJM2113)
设计说明
Calculate the speaker-stage dissipation from the actual supply voltage, quiescent current, and load rather than relying only on the 2.7 mA typical quiescent specification. The MC34119P is differential-output and begins operating at 2.0 V, so the usable speaker swing depends strongly on supply tolerance, output load, and the output-device configuration. Confirm worst-case supply, speaker impedance, and thermal conditions in the complete manufacturer data sheet before selecting the external speaker network.
Use a compact, quiet layout around the 8-DIP device, with input and output return paths kept short and away from switching nodes or telephone transient sources. Because the retrieved community discussion specifically reports EMI-immunity concerns for an alternative part, PCB cleanliness and grounding should be evaluated as part of the MC34119P design rather than assumed from nominal operation. Verify the package drawing and every pin function from the complete data sheet before fabrication.
Do not treat any unidentified 8-pin amplifier as a substitute for the MC34119P. Differential output polarity, gain-setting components, shutdown polarity, stability with the selected speaker, and EMI behavior must all be checked. The NJM2113 was mentioned in the retrieved NXP discussion but also reported as lacking differential outputs and equivalent EMI immunity, so it requires board-level and schematic validation rather than a simple order substitution.
Use the chip-disable function to reduce standby consumption when voice activity is infrequent, and account for its logic levels in the system controller. The documented typical power-down quiescent current is 65 µA, versus 2.7 mA during normal operation. Confirm whether shutdown affects only biasing or also isolates part of the output path by consulting the full data sheet, and provide a defined logic state during power-up to avoid audible transients.
合规信息
The retrieved MC34119P snippets do not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status. AEC-Q100 is marked not_applicable because the product is a legacy telephone audio amplifier rather than an identified automotive-qualified variant.
