MC34119D - Low-Power Class AB Audio Amplifier | NXP
MPN： MC34119D ✓ 啟用中MC34119D 概覽
An audio amplifier is an integrated circuit that accepts a low-level analog audio signal and delivers enough current and voltage to drive a speaker or another acoustic transducer. The MC34119 belongs to the Class AB amplifier category, where the output transistors conduct during the signal cycle for improved efficiency than a continuously biased Class A design. Its telephone-oriented architecture supports portable and line-powered equipment where low supply voltage and compact implementation are important.
The verified feature set includes a shutdown function, a single mono output channel, and differential speaker outputs. Differential outputs are particularly useful in telephone and speakerphone designs because they increase output swing into a differentially connected transducer. The manufacturer datasheet also identifies a 2.0 V minimum supply, allowing operation from low-energy source rails. The Class AB output stage is intended to balance output capability against power consumption in compact audio systems.
MC34119D applications include telephone speakerphones, compact voice terminals, intercom equipment, and other low-voltage audio products. In these systems, the amplifier converts a microphone or line-level signal into a differential drive capable of energizing a small speaker. Designers should account for the external output-coupling capacitors shown in the manufacturer application circuit when connecting a speaker, and should verify the shutdown-control polarity and timing before sequencing the device.
The most important design consideration is ensuring that the supply, input signal, output network, and speaker load remain within the limits defined by the manufacturer datasheet. Because the target is a legacy low-power audio amplifier, purchasing decisions should also account for lifecycle status, stock, and long-term sourcing rather than assuming availability from an active-production family.
This page consolidates the verified package, supply-voltage, amplifier-class, shutdown, and differential-output information with practical selection guidance. It also distinguishes confirmed facts from parameters that require confirmation in the original MC34119 manufacturer datasheet, helping engineers evaluate MC34119D without relying on incomplete distributor summaries.
直接替換替代品，適用於 MC34119D — 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。
此產品無可直接替換的替代品。
申請替代品MC34119D 最大額定值與電氣特性
| Product Type | Low-power audio amplifier integrated circuit |
| Amplifier Class | Class AB |
| 輸出類型 | 1-channel mono |
| 輸出配置 | Differential speaker outputs |
| Minimum Supply Voltage | 2.0 V |
| Supply Voltage Range | 2 V to 16 V |
| Bipolar Supply Voltage Range | +/-1 V to +/-8 V |
| Shutdown Function | Yes |
| Intended Application | Telephone equipment and speakerphones |
| 封裝 | 8-SOIC, 0.154 in (3.90 mm) body width |
| Alternate Package Listing | 8-TSSOP, 0.173 in (4.40 mm) body width |
| 安裝類型 | Surface mount |
| Manufacturer | NXP Semiconductors |
| Product Category | Audio amplifier IC |
MC34119D 8-tssop, 0.173 in (4.40 mm) body width 腳位配置指南
MC34119D（8-tssop, 0.173 in (4.40 mm) body width 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： MC34119D.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC34119D 適用於 6 應用s: Telephone Speakerphone, Compact Voice Terminal, Intercom Station, Low-Voltage Communication Handset, Portable Voice Monitor, Voice-Enabled Control Panel.
Telephone Speakerphone
The MC34119D is well suited to a telephone speakerphone because it is a mono Class AB amplifier specified for operation from a 2.0 V minimum supply and provides differential speaker outputs. According to the MC34119 manufacturer datasheet, the differential configuration maximizes output swing at low supply voltages. The IC can drive the telephone audio path after the receive signal has been conditioned by the rest of the voice circuit. Its shutdown function can disable the amplifier during inactive intervals. The designer should reproduce the manufacturer output network, select the correct external coupling capacitors, and verify speaker loading and thermal behavior on the final PCB.
推薦
Compact Voice Terminal
MC34119D can serve as the speaker amplifier in a compact voice terminal where the available supply is limited and a mono Class AB output stage is sufficient. Its verified 2.0 V minimum operating supply supports low-energy operation, while the listed 2 V to 16 V range covers conventional low-voltage systems. The shutdown function helps avoid wasting power when the enclosure is not actively carrying a call. Because maximum output power and output-current limits were not present in the verified excerpts, the speaker impedance and continuous drive level must be checked against the manufacturer electrical characteristics before production.
推薦
Intercom Station
The MC34119D is applicable to an intercom station requiring one-way, mono speech reproduction from a low-voltage supply. Its differential speaker outputs can improve usable swing in a compact implementation, which is particularly valuable when the system operates near the 2.0 V minimum specified by the manufacturer. Shutdown support can be coordinated with the conversation-control logic so that the amplifier does not consume power while the station is idle. The design should follow the manufacturer application schematic, retain the external speaker-coupling capacitors, and verify EMI behavior around the speaker leads.
推薦
Low-Voltage Communication Handset
MC34119D is suited to the receive-audio section of a low-voltage communication handset because it combines Class AB mono amplification, differential speaker drive, and shutdown control in an 8-pin surface-mount package. According to the manufacturer datasheet, the part was intended primarily for telephone equipment, so its application circuit is aligned with voice-band communication products. The 2.0 V minimum supply can simplify integration with low-voltage system rails. Before layout release, engineers should confirm the exact package outline and pin assignment because the verified distributor results contain conflicting 8-SOIC and 8-TSSOP descriptions.
推薦
Portable Voice Monitor
MC34119D can amplify a local voice-monitoring signal in a portable device operated from a low-energy source. Its one-channel Class AB topology is appropriate when only mono monitoring audio is required, and the verified shutdown function permits the amplifier to be disabled when monitoring is inactive. Differential speaker outputs maximize swing at the low supply voltages emphasized in the manufacturer datasheet. Designers should compare the verified supply range with the battery rail, account for the external output capacitors, and validate that the selected speaker impedance remains within the device's unsupplied maximum-output-power and output-current limits.
推薦
Voice-Enabled Control Panel
The MC34119D is useful in a voice-enabled control panel that converts a mono audio signal into differential speaker drive. Its verified Class AB output stage, shutdown capability, and low 2.0 V minimum supply fit compact embedded audio systems where power efficiency and component count matter. Differential outputs can improve signal swing, but the application still requires the external coupling capacitors shown in the manufacturer circuit. Before selecting a board footprint, resolve the package discrepancy in the verified listings by checking the exact NXP outline drawing and comparing lead pitch, body dimensions, and pin numbering.
推薦
推薦產品摘要
工程參考資料，適用於 MC34119D — 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 |
|---|---|
| Package | 8-SOIC according to DigiKey; 8-TSSOP appears in another verified listing |
| Brand | NXP Semiconductors |
| Amplifier Class | Class AB |
| Channel Configuration | 1-channel mono |
| Minimum Supply Voltage | 2.0 V |
| Supply Voltage Range | 2 V to 16 V |
| Bipolar Supply Range | +/-1 V to +/-8 V |
| Output Configuration | Differential speaker outputs |
| Shutdown | Yes |
| Primary Application | Telephone equipment and speakerphones |
主要差異化特點
- Telephone-specific low-voltage operation (對比MC34119P)
- Differential output swing (對比NJM2113)
- Integrated power management (對比MC34119P)
設計說明
Resolve the package discrepancy before PCB layout. The verified DigiKey record identifies an 8-SOIC with a 3.90 mm body width, while another result identifies an 8-TSSOP with a 4.40 mm body width. Confirm the ordering suffix, lead pitch, body dimensions, and pin numbering against the NXP manufacturer drawing. Do not combine an SOIC footprint with a TSSOP land pattern merely because both have eight terminals.
The verified manufacturer information establishes a 2.0 V minimum supply and a 2 V to 16 V listed range. Keep the supply within the manufacturer's absolute-maximum and operating limits, and account for the voltage drop across supply decoupling components. If the circuit uses bipolar rails, verify the ±1 V to ±8 V operating range. Numerical power dissipation cannot be calculated until output power, quiescent current, and voltage-drop specifications are confirmed from the datasheet.
Do not assume that the similar MC34119P is a drop-in replacement. The supplied cross-reference results do not establish an identical package, pinout, or electrical configuration. Likewise, NJM2113 is only mentioned in an NXP community discussion and is not proven pin-compatible. A valid substitution requires the manufacturer package drawing, pin table, supply limits, shutdown logic, gain, output drive, and application circuit to be compared explicitly.
Route the input and supply connections away from the speaker outputs and keep the output-coupling capacitors close to the amplifier pins. The differential speaker architecture can reduce radiated signal if the complete output network and speaker connection are implemented as intended. Validate EMI immunity with the final enclosure, speaker cable, grounding arrangement, and telephone interface because the verified search data does not provide detailed PCB-layout or EMC test results.
合規資訊
The supplied verified excerpts do not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status. AEC-Q100 is marked not applicable because MC34119D is a telephone audio amplifier rather than an automotive-qualified device in the provided data.
