MC145506P 22-DIP PCM Codec-Filter Mono-Circuit | Motorola
부품 번호: MC145506P ✗ 단종MC145506P 개요
A PCM codec-filter is a specialized interface IC that belongs to the broader class of audio codecs and PCM interface devices. In a telephone or telecommunications system, a PCM interface converts between analog voice signals and digital pulse-code-modulated streams. Codec-filter circuits also perform the band-limiting and smoothing needed to prepare signals for transmission or reconstruction at the receiving end.
The MC145506 family combines voice digitization and reconstruction with integrated filtering functions. According to the manufacturer datasheet, the MC145506, MC145507, and MC145508 are per-channel codec-filter PCM mono-circuits. This family positioning makes the MC145506P useful in designs that require a dedicated mono PCM channel rather than a multichannel audio codec with a substantially different control and data interface.
The MC145506P exposes a 13-bit PCM data path, making bit allocation an important system-level consideration. Designers should determine whether the host channel expects 13-bit linear PCM, determine the required clock and framing arrangement from the datasheet, and account for any sign-extension or scaling performed elsewhere in the system. These interface details are more important than simply matching a generic codec description because incompatible framing or timing can prevent correct operation despite similar audio functionality.
Typical applications include mono voice transmit and receive paths in telecommunications equipment, digital telephone interfaces, speech-processing systems, and PCM-based audio links. In each case, the device can combine conversion and filtering functions while reducing the number of external signal-conditioning blocks. Its mono-circuit architecture is particularly appropriate when each conversation channel is handled independently.
The primary design consideration is PCB footprint compatibility. The MC145506P uses a 22-pin DIP rather than a modern surface-mount package, so it requires through-hole routing and is generally less compact than newer PCM codec implementations. Confirm pin assignments, supply requirements, clocking, analog interfaces, and timing values against the manufacturer datasheet before laying out a new board or adapting an existing design.
This product record combines the manufacturer datasheet identity, distributor catalog details, package information, application guidance, and an explicit comparison of what is known about this legacy PCM interface with what requires circuit-level verification. It is intended to help engineers identify the correct function, package, and application before requesting sourcing information for an assembled board.
드롭인 대체품: MC145506P — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 제품에는 사용 가능한 드롭인 대체품이 없습니다.
대체품 요청MC145506P 최대 정격 & 전기적 특성
| Product Type | PCM codec-filter mono-circuit |
| PCM Resolution | 13 bit |
| Channel Architecture | Mono |
| Primary Functions | Voice digitization, reconstruction, band limiting, and smoothing |
| Device Family | MC145506, MC145507, and MC145508 |
| Package Type | 22-pin DIP |
| Package Pitch | 0.400 in |
| 실장 유형 | Through-hole |
| IC Classification | PCM codec-filter interface IC |
| Primary Application | PCM voice communication |
MC145506P 0.400 in 핀 구성 가이드
MC145506P(0.400 in 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: MC145506P.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
MC145506P 적합 용도: 6 애플리케이션s: Mono PCM Voice Transmit Path, PCM Voice Receive Path, Digital Telephone Interface, Speech Processing Terminal, Telecommunications Voice Card, PCM Audio Test Equipment.
Mono PCM Voice Transmit Path
The MC145506P can form the conversion and filtering section of a mono PCM voice transmit channel. Its documented functions include voice digitization, band limiting, and smoothing, while its 13-bit PCM interface provides the digital representation used by the next processing stage. This arrangement is useful in legacy telephone and speech-interface equipment where one circuit handles a single analog voice path. The host or transmission system must supply compatible clocking and framing, and the PCB must provide the device's 22-pin through-hole footprint. Because the device is a dedicated mono codec-filter rather than a general-purpose multichannel converter, designers should evaluate it when the architecture already reflects the MC145506 family and its PCM timing requirements.
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PCM Voice Receive Path
The MC145506P is applicable to a mono PCM receive path where a digital voice stream must be reconstructed into a smoothed analog signal. Its codec-filter functions combine reconstruction with the band-limiting and smoothing normally required before the recovered audio reaches a receive amplifier. This makes the IC relevant to legacy digital telephone and communications equipment using a compatible 13-bit PCM format. Correct operation depends on matching the source clock, data framing, and expected sample timing. Designers should also validate the analog output path against the manufacturer's typical application information. For new compact products, a surface-mount codec may reduce board area, but the MC145506P remains relevant when retaining a proven 22-DIP implementation or repairing an existing assembly.
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Digital Telephone Interface
The MC145506P can support a dedicated mono voice channel in digital telephone interface equipment. The manufacturer describes it as a per-channel codec-filter PCM mono-circuit, which aligns with systems that process one direction or one conversation channel per device. Its integrated digitization, reconstruction, band limiting, and smoothing functions reduce the number of separate blocks around the PCM interface. The implementation should preserve the original system's clock and channel format rather than assuming every 13-bit PCM codec is interchangeable. Line-interface amplifiers, protection, microphone or speaker coupling, and system timing remain external design responsibilities. The 22-pin DIP package makes the MC145506P most attractive for legacy telephone hardware, industrial communication terminals, and maintenance platforms that already use its footprint.
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Speech Processing Terminal
A mono speech-processing terminal can use the MC145506P where voice is captured, digitally filtered, transferred, and reconstructed through a conventional PCM channel. The codec-filter architecture directly supports the analog-to-digital and digital-to-analog portions of that path. Because the MC145506P handles one channel, a full-duplex or multi-channel terminal may require multiple devices or a different multichannel codec. Designers should evaluate the device against the original speech processor's expected 13-bit data format, clock frequency, and framing. It is particularly useful for industrial speech terminals, legacy answering machines, and test equipment built around Motorola PCM interfaces. A modern redesign should still compare conversion performance, supply architecture, board area, and software-support requirements against current interface ICs.
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Telecommunications Voice Card
The MC145506P is suitable for a plug-in or legacy telecommunications voice card that requires a self-contained mono PCM conversion section. Its integration of digitization, reconstruction, filtering, and smoothing supports a compact analog front end around a digital channel. The card designer must provide the correct supply arrangement, clock source, PCM data interface, and analog signal conditioning described by the manufacturer. Pin-compatible substitutions should not be assumed merely because related devices share a die; package and electrical differences remain decisive. MC145506P is therefore a useful component for preserving proven telecom architectures, extending the service life of installed equipment, or repairing cards whose original MCU no longer supports the required PCM timing. For new high-density line cards, current surface-mount codecs generally offer a smaller footprint.
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PCM Audio Test Equipment
The MC145506P can serve as the PCM voice codec-filter element in test equipment that generates, receives, or validates mono voice channels. Combining conversion and filtering in one device reduces the number of analog support blocks required around a test channel and preserves the behavior of circuits designed for the MC145506 family. Laboratory designers should control the PCM clock and framing independently so that data errors can be distinguished from analog-path faults. They must also account for the through-hole package when arranging connectors, shielding, and removable instrumentation. The device is especially relevant to repair and characterization fixtures for telecom equipment. New automated test platforms may prefer a surface-mount codec with selectable clocking or test features, but the MC145506P remains appropriate when reproducing a legacy channel exactly.
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추천 제품 요약
엔지니어링 참조 데이터: MC145506P — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 |
|---|---|
| Product Type | PCM codec-filter mono-circuit |
| Brand | Motorola |
| Package | 22-pin DIP, 0.400-inch pitch |
| PCM Resolution | 13 bit |
| Channel Architecture | Mono |
| Voice Digitization | — |
| Voice Reconstruction | Supported |
| Filtering and Smoothing | Band limiting and smoothing |
| Mounting Type | Through-hole |
주요 차별점
- Integrated mono voice conversion and filtering in one circuit (vs MC145505P)
- Direct 13-bit PCM voice-channel implementation (vs PCM1808PW)
- Established legacy telecom integration (vs PCM1725DR)
설계 노트
Treat the MC145506P as a legacy through-hole component and preserve its 22-pin DIP footprint when updating a PCB. Maintain adequate spacing around the package for analog routing, connector access, and manual inspection. Do not substitute a similarly named codec or a related die variant without checking every pin assignment, power connection, clock input, PCM signal, and analog interface in the manufacturer datasheet.
Route PCM clock and data traces away from analog voice and power connections to reduce coupling into the 13-bit conversion path. Use a controlled ground return for digital signals, keep analog and digital return currents separated where possible, and avoid long parallel runs between opposing signal directions. Validate timing against the manufacturer's clock and data specifications rather than assuming compatibility with another 13-bit PCM interface.
Do not infer drop-in compatibility from the shared silicon die associated with MC145505P and MC14551BD, because the identified listing states that different packages are used. A valid replacement must also match the 22-DIP footprint, pin functions, supply arrangement, PCM resolution, clock timing, and analog performance. Complete a board-level comparison and obtain manufacturer confirmation before changing the approved component.
규정 준수 정보
This legacy Motorola codec-filter is not presented as an AEC-Q100-qualified automotive device. RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations require a current manufacturer or distributor declaration.
