PCA9554A 具有中断输出和配置寄存器的远程 8 位 I2C 和 SMBus I/O 扩展器
This 8-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.3-V to 5.5-V VCC operation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)].
The PCA9554A consists of one 8-bit Configuration (input or output selection), Input, Output, and Polarity Inversion (active high or active low) registers. At power on, the I/Os are configured as inputs with a weak pullup to VCC. However, the system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master.
The system master can reset the PCA9554A in the event of a timeout or other improper operation by utilizing the power-on reset feature, which puts the registers in their default state and initializes the I2C/SMBus state machine.
The PCA9554A open-drain interrupt (INT) output is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master that an input state has changed.
INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C bus. Thus, the PCA9554A can remain a simple slave device.
The device's outputs (latched) have high-current drive capability for directly driving LEDs and low current consumption.
Three hardware pins (A0, A1, and A2) are used to program and vary the fixed I2C address and allow up to eight devices to share the same I2C bus or SMBus.
The PCA9554A is pin-to-pin and I2C address compatible with the PCF8574A. However, software changes are required, due to the enhancements in the PCA9554A over the PCF8574A.
The PCA9554A and PCA9554 are identical except for their fixed I2C address. This allows for up to 16 of these devices (8 of each) on the same I2C/SMBus
| PCA9554A | |
| No. of Outputs | 8 |
| Interrupt Output | Yes |
| Technology Family | 0.1,0.4 |
| fSCLK(Max)(MHz) | 2.3 |
| VCC(Min)(V) | 5.5 |
| VCC(Max)(V) | 16QFN, 16SOIC, 16SSOP, 16TSSOP, 16TVSOP, 16VQFN |
| Pin/Package | -40 to 85 |
| Operating Temperature Range(°C) | 400 |
| I2C Address | 0111 xxx |
| # of I/Os | 8 |
| Vcc range(V) | 2.3 to 5.5 |
| Configuration Registers | Yes |
| 5V Tolerant I/O | Yes |
| Push–Pull I/O Type | Yes |
PCA9554A 特性
- I2C to Parallel Port Expander
- Open-Drain Active-Low Interrupt Output
- Operating Power-Supply Voltage Range of 2.3 V to 5.5 V
- 5-V Tolerant I/Os
- 400-kHz Fast I2C Bus
- Three Hardware Address Pins Allow up to Eight Devices on the I2C/SMBus
- Input/Output Configuration Register
- Polarity Inversion Register
- Internal Power-On Reset
- Power-Up With All Channels Configured as Inputs
- No Glitch on Power Up
- Latched Outputs With High-Current Drive Maximum Capability for Directly Driving LEDs
- Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
- ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)
PCA9554A 芯片订购指南
| 器件 | 状态 | 温度 | 价格 | 封装 | 引脚 | 封装数量 | 封装载体 | 丝印标记 |
| PCA9554ADB | ACTIVE | -40 to 85 | 1.05 | 1ku | SSOP (DB) | 16 | 80 | TUBE | |
| PCA9554ADBG4 | ACTIVE | -40 to 85 | 1.05 | 1ku | SSOP (DB) | 16 | 80 | TUBE | |
| PCA9554ADBR | ACTIVE | -40 to 85 | 0.85 | 1ku | SSOP (DB) | 16 | 2000 | LARGE T&R | |
| PCA9554ADBRG4 | ACTIVE | -40 to 85 | 0.85 | 1ku | SSOP (DB) | 16 | 2000 | LARGE T&R | |
| PCA9554ADGVR | ACTIVE | -40 to 85 | 0.85 | 1ku | TVSOP (DGV) | 16 | 2000 | LARGE T&R | |
| PCA9554ADGVRG4 | ACTIVE | -40 to 85 | 0.85 | 1ku | TVSOP (DGV) | 16 | 2000 | LARGE T&R | |
| PCA9554ADW | ACTIVE | -40 to 85 | 1.05 | 1ku | SOIC (DW) | 16 | 40 | TUBE | |
| PCA9554ADWG4 | ACTIVE | -40 to 85 | 1.05 | 1ku | SOIC (DW) | 16 | 40 | TUBE | |
| PCA9554ADWR | ACTIVE | -40 to 85 | 0.85 | 1ku | SOIC (DW) | 16 | 2000 | LARGE T&R | |
| PCA9554ADWRG4 | ACTIVE | -40 to 85 | 0.85 | 1ku | SOIC (DW) | 16 | 2000 | LARGE T&R | |
| PCA9554APW | ACTIVE | -40 to 85 | 1.05 | 1ku | TSSOP (PW) | 16 | 90 | TUBE | |
| PCA9554APWG4 | ACTIVE | -40 to 85 | 1.05 | 1ku | TSSOP (PW) | 16 | 90 | TUBE | |
| PCA9554APWR | ACTIVE | -40 to 85 | 0.85 | 1ku | TSSOP (PW) | 16 | 2000 | LARGE T&R | |
| PCA9554APWRG4 | ACTIVE | -40 to 85 | 0.85 | 1ku | TSSOP (PW) | 16 | 2000 | LARGE T&R |
PCA9554A 质量与无铅数据
| 器件 | 环保计划* | 铅/焊球涂层 | MSL 等级/回流焊峰 | 环保信息与无铅 (Pb-free) | DPPM / MTBF / FIT 率 |
| PCA9554ADB | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9554ADB | PCA9554ADB |
| PCA9554ADBG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9554ADBG4 | PCA9554ADBG4 |
| PCA9554ADBR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9554ADBR | PCA9554ADBR |
| PCA9554ADBRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9554ADBRG4 | PCA9554ADBRG4 |
| PCA9554ADGVR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9554ADGVR | PCA9554ADGVR |
| PCA9554ADGVRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9554ADGVRG4 | PCA9554ADGVRG4 |
| PCA9554ADW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9554ADW | PCA9554ADW |
| PCA9554ADWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9554ADWG4 | PCA9554ADWG4 |
| PCA9554ADWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9554ADWR | PCA9554ADWR |
| PCA9554ADWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9554ADWRG4 | PCA9554ADWRG4 |
| PCA9554APW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9554APW | PCA9554APW |
| PCA9554APWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9554APWG4 | PCA9554APWG4 |
| PCA9554APWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9554APWR | PCA9554APWR |
| PCA9554APWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | PCA9554APWRG4 | PCA9554APWRG4 |
PCA9554A 应用技术支持与电子电路设计开发资源下载
- PCA9554A 数据资料 dataSheet 下载.PDF
- TI 德州仪器I2C 逻辑器件产品选型与价格 . xls
- Logic Guide 2009 (PDF 4263 KB)
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
- Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
- TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
- Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
- CMOS Power Consumption and CPD Calculation (PDF 89 KB)
- Designing With Logic (PDF 186 KB)
- Live Insertion (PDF 150 KB)
- Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
- Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- LOGIC Pocket Data Book (PDF 6001 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- Logic Cross-Reference (PDF 2938 KB)
