MC14407L - Full-Duplex 8-Bit PCM Codec | Motorola
부품 번호: MC14407L ✗ 단종MC14407L 개요
A PCM codec is a semiconductor interface IC that performs the digital conversion required by pulse-code-modulation communication systems. In the hierarchy of electronic components, a codec belongs to the interface IC and telecom-interface categories, between general-purpose integrated circuits and complete voice-processing subsystems. Companded PCM reduces the number of bits required to represent selected voice-amplitude ranges while retaining a representation suitable for transmission over digital communication links.
The MC14407L supports both A-law and mu-law operation, allowing it to match common digital telephony signaling conventions. Its full-duplex architecture supports simultaneous transmit and receive signal paths, making it suitable for channel interfaces, terminal adapters, and telecommunications equipment that exchange PCM data with a line interface or digital switching system. The 24-pin CDIP package also provides a through-hole construction for systems assembled with conventional axial or DIP-compatible processes.
Operation across -40°C to +85°C supports industrial-temperature telecommunications equipment, although the available evidence does not specify a modern automotive qualification. The MC14407L is a legacy Motorola Semiconductor device rather than a contemporary lead-free-focused component. Consequently, engineers should confirm current availability, original construction details, obsolete-material conditions, and revision-specific timing or electrical limits against the manufacturer datasheet and the authorized distributor documentation before committing a new design.
Typical uses include PCM switching interfaces, digital telephone terminal equipment, voice-channel converters, telecommunications multiplexers, and embedded systems that need an A-law or mu-law PCM codec. System-level implementation also depends on the connected line-interface or DSP device, clocking arrangement, signal framing, and board-level decoupling specified in the original design documentation.
The principal design consideration is that MC14407L is a legacy through-hole codec, so a modern replacement cannot be selected from package size alone. The replacement should be verified for pin-to-pin behavior, clock mode, companding law, power requirements, timing margins, and channel direction. This page synthesizes the verified distributor and datasheet references, sourcing information, and cautious replacement guidance that are not consolidated in a single manufacturer product page.
드롭인 대체품: MC14407L — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 제품에는 사용 가능한 드롭인 대체품이 없습니다.
대체품 요청MC14407L 사양
| Device Type | Full-duplex PCM codec |
| 분해능 | 8 bit |
| Companding | A-law and mu-law |
| Duplex Mode | Full duplex |
| Signal Type | Companded PCM |
| 패키지 | 24-pin CDIP |
| Package Type | Ceramic DIP |
| 실장 유형 | Through-hole |
| 핀 수 | 24 pins |
| 동작 온도 범위 | -40°C to +85°C |
| Application Category | Telecommunication interface IC |
| Manufacturer | Motorola Semiconductor |
| RoHS 상태 | unknown |
| REACH Status | unknown |
MC14407L ceramic dip 핀 구성 가이드
MC14407L(ceramic dip 패키지)의 핀 구성입니다. 핀 번호, 기능, 연결 다이어그램은 제조사 데이터시트에 정의되어 있습니다. 정확한 풋프린트와 솔더링 지침은 해당 문서를 참조하십시오.
다음에 대한 상세 핀아웃 데이터 없음: MC14407L.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
MC14407L 적합 용도: 6 애플리케이션s: Digital Telephony Terminal Interfaces, Telecommunications Channel Converters, PCM Switching Interface Equipment, Voice Multiplexer Backplanes, Legacy Voice Processing Systems, Digital Voice Test Equipment.
Digital Telephony Terminal Interfaces
The MC14407L fits digital telephone terminal equipment that must exchange 8-bit companded PCM voice samples. Its verified support for A-law and mu-law provides compatibility with common digital telephony signaling conventions, while the full-duplex architecture supports separate transmit and receive paths. The 24-pin CDIP package supports through-hole assembly in established equipment. Exact clock, framing, and control details must be taken from the original datasheet, and original-stock traceability is essential because the available data does not establish ongoing production status.
Telecommunications Channel Converters
MC14407L is suitable for a channel-converter subsystem that translates between an external PCM stream and the voice-processing section of a telecommunications system. The device provides the core 8-bit companded PCM conversion function identified in the manufacturer documentation, with A-law and mu-law support allowing deployment in systems using either convention. Full-duplex operation reduces the need for separate unidirectional codec paths. Board-level implementation must preserve the original timing, clocking, grounding, and decoupling arrangement because those details are not included in the supplied search records.
PCM Switching Interface Equipment
The MC14407L can be used in legacy PCM switching and multiplexing equipment where a channel needs an 8-bit companded PCM interface. Its full-duplex PCM codec function supports bidirectional traffic through one codec position, while A-law and mu-law operation increases compatibility with different digital telephony systems. The -40°C to +85°C operating range is suitable for many industrial environments. However, the ceramic DIP package is physically large compared with modern surface-mount codecs, and a new design should weigh redesign cost against device availability and lifecycle uncertainty.
Voice Multiplexer Backplanes
In a voice multiplexer backplane, MC14407L can provide the PCM-side conversion required between voice channels and a digital transport or switching path. The verified 8-bit resolution and support for A-law and mu-law align with legacy digital voice-processing architectures, and full-duplex operation suits bidirectional channel traffic. Because the device is a through-hole CDIP-24 part, designers must account for connector density and board insertion requirements. Signal-integrity decisions, including clock routing and return paths, should follow the original reference design rather than assumptions based on modern codec layouts.
Legacy Voice Processing Systems
MC14407L is appropriate for maintenance and expansion of legacy voice-processing systems that already standardize on an 8-bit A-law or mu-law PCM codec. Using the documented device can preserve the established interface behavior while avoiding a high-risk board-level conversion. Its industrial temperature range of -40°C to +85°C supports controlled indoor equipment, but it does not by itself establish compliance with automotive, medical, or safety-critical requirements. Procurement teams should request original manufacturer stock, change-history evidence, and inspection records before using it in long-lived systems.
Digital Voice Test Equipment
MC14407L can be incorporated into specialized digital voice test equipment that needs a standardized companded PCM endpoint. Its 8-bit A-law and mu-law support allows the test system to exercise equipment connected through legacy PCM interfaces, while full-duplex behavior supports loopback and bidirectional test arrangements. The through-hole CDIP-24 package simplifies retrofitting into older instrument chassis. Designers must still validate signal timing, clock relationships, framing, and logic levels against the manufacturer datasheet and should avoid treating the codec as a complete line-interface solution by itself.
엔지니어링 참조 데이터: MC14407L — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
주요 차별점
- Combined A-law and mu-law support (vs Generic 8-bit PCM codec)
- Full-duplex signal handling (vs Simplex PCM interface device)
- Established 24-pin CDIP construction (vs Modern surface-mount codec)
설계 노트
Do not approve a substitute from package appearance alone. The verified MC14407L record establishes a 24-pin CDIP package, 8-bit resolution, A-law and mu-law support, and full-duplex operation, but it does not provide a complete pinout or electrical table. Before replacing the device, compare power pins, clock inputs, frame timing, control inputs, PCM data buses, analog-side connections, logic thresholds, absolute maximum ratings, and package pin numbering against the manufacturer datasheet.
Confirm the original supply-voltage range and pin sequence before board rework because those values are not included in the verified records. Use the manufacturer datasheet for decoupling and power-up requirements rather than copying values from a modern codec. For a legacy through-hole repair, inspect the socket and board for oxidation, cracked joints, and electrostatic-damage risk; a newly soldered MC14407L can still fail if the original system rail sequence or grounding practice was abnormal.
Clock and PCM data routing should follow the original reference layout as closely as possible. Keep clock and data paths short, maintain a continuous return path, and avoid routing sensitive voice-side connections beside high-energy switching nodes. Because the supplied data does not specify operating frequency, logic levels, or timing margins, do not derive new timing limits or rise-time requirements from general PCM assumptions; extract them from the applicable Motorola datasheet.
Procurement requires special attention because MC14407L is a legacy Motorola Semiconductor product and the verified results mix distributor inventory, archived stock figures, and general search snippets. Request the manufacturer part marking, date code, packaging condition, and traceability documentation. Confirm electrical performance after installation, especially if the offered unit is recovered stock. Treat a marketplace listing as an acquisition lead rather than proof of lifecycle status or future production availability.
규정 준수 정보
The supplied search records do not provide authoritative RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 qualification is not stated and is therefore recorded as not_qualified.
