MC145026P - 9-Line CMOS Encoder | NXP | Remote Control
MPN： MC145026P ✗ 停產MC145026P 概覽
A remote-control encoder is a logic IC that converts a group of physical control inputs into a serial data stream suitable for transmission over a wired or wireless communications link. In the broader product hierarchy, it is a CMOS encoder within the interface-IC and logic-IC categories, connecting human-operated controls to an embedded control, communication, or automation system. The MC145026P forms the transmitting side of the encoder and decoder family described by NXP.
The principal features are nine independently encoded lines, three valid logic states per line, support for trinary encoding, and duplicate-word transmission. The active-low transmit-enable input provides a defined event for starting a serial sequence. Because an open state is distinct from low and high, the device can represent more commands with fewer physical input lines than a conventional binary-only encoder.
The encoder converts each input combination into a serial codeword and drives its serial output when transmit enable is asserted. During an encoding sequence, the word is transmitted twice, allowing the receiving decoder to reject many transmission errors and recognize repeated valid data. The NXP datasheet identifies the nine inputs as A1 through A5 and A6/D6 through A9/D9, reflecting the family’s support for paired encoder and decoder functions.
Typical uses include television remote controls, audio-system command links, industrial pendant controllers, garage-door and access-control transmitters, and low-cost consumer control panels. The device is particularly useful when a design needs a compact command interface with more valid states than a conventional nine-bit binary input would provide, without requiring a separate microcontroller to serialize every button event.
When laying out a transmitter, treat the nine command inputs as digital signal lines and keep their traces away from noisy switching nodes. Confirm the electrical levels of the receiver interface and provide suitable pull components for open-state operation. Firmware or hardware should also distinguish a valid repeated word from an incomplete or corrupted transmission before acting on a remote command.
This product page combines the NXP manufacturer datasheet, distributor identification, package information, and technical search results with practical guidance for PCB implementation, system pairing, sourcing, and design verification. It also distinguishes the MC145026 encoder from its decoder counterpart and records the absence of a manufacturer-supported pin-compatible substitute.
直接替換替代品，適用於 MC145026P — 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MC145026P 規格
| Product Type | CMOS remote-control encoder IC |
| Encoded Input Lines | 9 lines |
| Input Logic States | 3 states per line: low, high, or open |
| Maximum Encoded Codes | 19,683 codes |
| Transmission Repetition | 2 word transmissions per encoding sequence |
| Transmit Enable | Active-low TE input |
| Output Format | Serial encoded data |
| Input Designations | A1-A5 and A6/D6-A9/D9 |
| Process Technology | CMOS |
| Package Type | 16-pin PDIP |
| 腳位數 | 16 pins |
| 安裝類型 | Through-hole |
| Temperature Grade | Industrial |
MC145026P 16-pin pdip 腳位配置指南
MC145026P（16-pin pdip 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： MC145026P.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC145026P 適用於 6 應用s: Television Remote Controls, Audio System Remote Controls, Industrial Pendant Controllers, Garage Door and Access Control Transmitters, Consumer Appliance Remote Interfaces, Legacy Equipment Remote Controls.
Television Remote Controls
The MC145026P fits a compact television transmitter because its nine trinary command inputs provide up to 19,683 combinations while requiring relatively few external control lines. Each input can represent low, high, or open, allowing a keypad matrix or multi-state switch bank to encode user commands without a dedicated microcontroller. When transmit enable is asserted low, the encoder sends the selected word twice, allowing the matching receiver decoder to reject many invalid or corrupted sequences. The 16-pin PDIP package favors legacy through-hole transmitter boards rather than compact surface-mount consumer products.
推薦
Audio System Remote Controls
The MC145026P can translate front-panel and handheld audio commands into a compact serial transmission for a matching decoder. Its nine inputs and three-state encoding scheme support dense command sets without assigning a separate wire to every button. Duplicate transmission of each encoded word provides a basic integrity mechanism for the receiving system. The design remains best suited to legacy audio products that already use the MC145026 timing, interface, and 16-pin PDIP footprint rather than new designs requiring software-configurable protocols.
推薦
Industrial Pendant Controllers
The MC145026P is applicable to an industrial pendant or station controller where multiple commands must travel over a limited wiring interface. Nine trinary inputs can encode a large command space, and the active-low transmit-enable event allows the transmitter to send only when the operator changes a control. Repeated encoded words add a degree of message recognition at the decoder. Industrial adoption should be checked against the manufacturer’s operating-temperature and electrical limits, and an isolation strategy may be needed for long external wiring.
推薦
Garage Door and Access Control Transmitters
The MC145026P can serve as the command encoder in a compact garage-door, gate, or access-control transmitter because it combines nine command inputs with serial output and repeated word transmission. A receiver using the complementary decoder can validate the repeated command before activating a relay or changing lock state. The trinary inputs also support functions beyond a simple on/off button, such as multiple user levels or operating modes. The receiver must include appropriate command authorization because the encoder protocol alone does not provide cryptographic authentication.
推薦
Consumer Appliance Remote Interfaces
The MC145026P is suitable for a dedicated appliance-control transmitter when the product architecture already relies on the MC145026 family. Nine input lines can carry a broad command map, while the serial interface reduces the number of interconnections between the control panel and receiver. Sending every encoded word twice helps the decoder identify stable valid data. Because the device is a legacy 16-pin PDIP part, new compact appliances generally favor a software encoder or a smaller surface-mount interface unless compatibility with an existing receiver is mandatory.
推薦
Legacy Equipment Remote Controls
The MC145026P is most practical in a legacy equipment refurbishment where an existing transmitter board requires the same pin arrangement, trinary input behavior, and serial timing. The nine input lines can preserve the original control map, while the transmit-enable input supports event-driven transmission. A matching MC145027P receiver can decode the repeated word without changing the external command set. Engineers should treat this as a compatibility-driven implementation and verify timing, supply requirements, and signal levels against the manufacturer document before releasing a replacement.
推薦
推薦產品摘要
工程參考資料，適用於 MC145026P — 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 |
|---|---|
| Function | Remote-control encoder |
| Brand | NXP Semiconductors |
| Package | 16-pin PDIP |
| Encoded Input Lines | 9 lines |
| Logic States per Input | 3 states: low, high, or open |
| Maximum Codes | 19,683 codes |
| Transmission Repetition | 2 word transmissions per sequence |
| Transmit Enable | Active-low |
| Process Technology | CMOS |
| Mounting Type | Through-hole |
主要差異化特點
- Nine trinary command inputs provide a dense encoding space (對比MC145027P)
- Repeated encoded words improve basic message recognition (對比MC145028P)
- Explicit event-driven transmission control (對比MC145027P)
設計說明
Keep the nine command-input traces short and away from switching regulators, relay contacts, and high-current motor wiring. Assign the open, low, and high states consistently in the hardware and verify each state at the receiver. The active-low transmit-enable trace should not be allowed to float; use the interface arrangement specified by the manufacturer application circuit so that noise or supply disturbance does not create unintended transmission events.
Do not treat MC145026P as a generic nine-bit serializer. Its valid inputs are trinary, and an open state is functionally different from both low and high. Also do not substitute MC145027P or MC145028P for the encoder: those devices serve complementary roles in the family. Preserve the original command timing, transmit-enable polarity, and decoder acceptance rules so that the PCB remains electrically and functionally compatible.
Design the receiving path to recognize the repeated encoded word rather than acting on the first serial event. This improves rejection of incomplete or corrupted messages, but it is not a substitute for cryptographic authentication in security-sensitive access equipment. Check the decoder’s reset behavior, power-up sequence, and minimum command repetition strategy before defining the transmitter’s enable timing and input-change policy.
Use the manufacturer pin-description table to assign the 16 PDIP connections and preserve the original component orientation. Because the MC145026P is a legacy through-hole encoder, replacement work commonly involves soldering rather than a surface-mount footprint conversion. Inspect the board for electrolytic leakage, broken traces, and connector contamination because those faults can imitate invalid trinary input states or corrupt the repeated serial transmission.
合規資訊
The component is a legacy CMOS logic IC. No specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration appears in the cited product records.