PCA9554D - 8-Bit I2C/SMBus GPIO Expander | NXP
部品番号: PCA9554D ✗ 生産終了PCA9554D 概要
ドロップイン代替品: PCA9554D — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: PCA9554D （同一形状・フットプリント） — 相違点: Package.
PCA9554ABS3,118
✅ ドロップイン価格はお問い合わせください
データシートを見る →PCA9554D,118
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PCA9554D
✅ ドロップイン価格はお問い合わせください
データシートを見る →PCA9554ABS3,118
✅ ドロップイン価格はお問い合わせください
データシートを見る →PCA9516AD,112
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PCA9541AD/03,118
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PCA9554D 仕様
| Device Type | 8-bit I2C-bus/SMBus I/O expander with interrupt |
| Number of I/O Lines | 8 bits |
| Bus Interface | I2C and SMBus |
| I2C Maximum Frequency | 400 kHz |
| パッケージ | SO16, 16 pins |
| Device Technology | CMOS |
| Host Bus Connections | Serial I2C/SMBus interface for host communication |
| Parallel Port Connections | 8 configurable general-purpose I/O lines |
| Interrupt Function | Yes; interrupt output available |
| ライフサイクル状態 | End of Life, according to the NXP product information search result |
PCA9554D so16, 16 pins ピン配置ガイド
PCA9554D (so16, 16 pins パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: PCA9554D.
詳細は データシート をご参照ください。
主な用途
PCA9554D の用途: 7 件s: Microcontroller GPIO Expansion, Industrial Control Signal Interface, LED and Indicator Control, Remote Input Monitoring, Embedded Control Panel, Instrumentation and Test Equipment, Battery-Powered Portable System.
Microcontroller GPIO Expansion
The PCA9554D is useful when a microcontroller needs additional control or monitoring points without consuming native GPIO pins. Its eight I/O lines are connected over I2C/SMBus, while the interrupt line can notify the host when a monitored input changes. The verified source data confirms 8-bit expansion, interrupt support, and 400 kHz I2C operation, but the engineer should verify output-drive limits and exact pin behavior in the NXP datasheet before driving loads.
おすすめ
Industrial Control Signal Interface
PCA9554D can act as a compact serial-to-parallel interface between a controller and industrial equipment requiring several discrete control points. The eight GPIO lines can represent enables, status inputs, or relay-driver commands, while the interrupt output reduces unnecessary polling. Because the verified data does not state the output current, input voltage range, or temperature limits, the final design must use the manufacturer datasheet and add suitable driver circuitry for inductive or high-current loads.
おすすめ
LED and Indicator Control
The PCA9554D can provide configurable output states for LEDs, indicators, or digital control signals when the current and voltage requirements are within the device's verified electrical limits. Since those output limits are not included in the supplied data, designers should not connect loads directly without checking the datasheet. A low-current indicator arrangement may use the GPIO outputs with suitable series resistance, while larger LED banks should use transistor driver stages and separate supply rails.
おすすめ
Remote Input Monitoring
The PCA9554D is well suited to monitoring multiple external status signals over a short I2C bus. The host can read port state through the serial interface and use the interrupt output to avoid repeated polling when a monitored line changes. This is useful in equipment with limit switches, interlocks, or sensor-enable signals, provided the input voltage, pull-up configuration, and logic thresholds are confirmed from the NXP documentation.
おすすめ
Embedded Control Panel
A PCA9554D can expand a compact controller into a configurable control-panel interface by connecting buttons, selectors, indicators, and output-enable signals. The eight GPIO lines provide parallel access while I2C carries configuration from the host, and the interrupt feature supports prompt notification of input events. Product planning must account for the NXP End of Life status and confirm the exact package, address, and pinout with current manufacturer documentation.
おすすめ
Instrumentation and Test Equipment
In instrumentation, the PCA9554D can centralize front-panel status and control lines while reducing the number of pins required from the main controller. Its interrupt capability supports event-driven handling of switches or external conditions, and the confirmed 400 kHz I2C rating fits many embedded control systems. The device should be used only after verifying noise, supply-voltage, timing, and logic-level requirements in the relevant application and datasheet.
おすすめ
Battery-Powered Portable System
PCA9554D can reduce host GPIO usage in a portable or battery-powered embedded system where connector and status lines are more numerous than available controller pins. The I2C interface keeps wiring and pin count manageable, while the interrupt line allows event-driven operation instead of continuous polling. The supplied data does not provide standby current, active current, or supply-voltage specifications, so battery-life and power-budget calculations require the official NXP datasheet.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PCA9554D — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | PCA9554A | PCA9554D,118 | PCA9554 |
|---|---|---|---|---|
| Device Type | 8-bit I2C/SMBus I/O expander with interrupt | 8-bit I2C/SMBus I/O expander; address differs from PCA9554D | PCA9554D orderable suffix | 8-bit I2C/SMBus I/O expander with interrupt |
| GPIO Count | 8 bits | 8 bits | 8 bits | 8 bits |
| I2C/SMBus Support | I2C and SMBus | I2C and SMBus | I2C and SMBus | I2C and SMBus |
| Interrupt | Yes | Yes | Yes | Yes |
| Package | SO16 | SO16 | SO16 | SO16 |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments |
主な差別化要因
- Directly identified 8-bit I2C/SMBus expansion with interrupt （vs PCA9554)
- Known address distinction from PCA9554A （vs PCA9554A)
- SO16 package alignment （vs PCA9554D,118)
設計ノート
Do not substitute PCA9554A without checking the I2C address and firmware configuration. NXP's verified product information explicitly notes that PCA9554D has a different address from PCA9554A. Even when the package and family function appear similar, an address change can prevent the host from detecting the device, cause bus conflicts, or require source-code changes. Compare the address pins, power-up defaults, register map, and interrupt polarity against the current datasheet.
Keep the PCA9554D's I2C traces short and route them away from noisy switching nodes and high-current relay or motor paths. Confirm the required pull-up voltage and resistor values from the complete electrical specification, because the supplied data does not include them. Place the device close to the controlled connector or sensor group when possible, and provide a common ground reference between the expander and the host controller.
Treat the eight GPIO lines as logic signals unless the manufacturer datasheet proves otherwise. The supplied sources do not specify output current, output voltage, or absolute maximum ratings, so LEDs, relays, solenoids, and other high-energy loads should use suitable driver circuits. Estimated design rule: size any driver stage from the load's worst-case voltage and current rather than from the nominal 5 V control rail, and account for inductive flyback protection.
Because NXP labels PCA9554D End of Life, purchasing decisions should include lifecycle risk, lot traceability, and authorized sourcing. A distributor page may show stock without proving the package suffix, date code, or condition. Do not treat a generic cross-reference result as proof of equivalence; inspect the official NXP product-change and replacement information and perform a hardware review against the original schematic and firmware.
コンプライアンス情報
The supplied verified data does not include specific RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 declarations. NXP identifies the product as End of Life; compliance must be confirmed from current manufacturer documentation and the applicable supply-chain records.
