参数资料
| 型号： | PCA9554ATS,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 1/35页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 20SSOP |
| 标准包装： | 1 |
| 接口： | I²C，SM 总线 |
| 输入/输出数： | 8 |
| 中断输出： | 是 |
| 频率 - 时钟： | 400kHz |
| 电源电压： | 2.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-LSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 标准包装 |
| 包括： | POR |
| 产品目录页面： | 826 (CN2011-ZH PDF) |
| 配用： | 568-4002-ND - DEMO BOARD I2C |
| 其它名称： | 568-2024-6 |
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1.
General description
The PCA9554 and PCA9554A are 16-pin CMOS devices that provide 8 bits of General
Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications and
were developed to enhance the NXP Semiconductors family of I2C-bus I/O expanders.
The improvements include higher drive capability, 5 V I/O tolerance, lower supply current,
individual I/O configuration, 400 kHz clock frequency, and smaller packaging. I/O
expanders provide a simple solution when additional I/O is needed for ACPI power
switches, sensors, push buttons, LEDs, fans, and so on.
The PCA9554/PCA9554A consist of an 8-bit Configuration register (Input or Output
selection); 8-bit Input Port register, 8-bit Output Port register and an 8-bit Polarity
Inversion register (active HIGH or active LOW operation). 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 Port or Output Port register. The
polarity of the read register can be inverted with the Polarity Inversion register. All
registers can be read by the system master. Although pin-to-pin and I2C-bus address
compatible with the PCF8574 series, software changes are required due to the
enhancements and are discussed in Application Note AN469.
The PCA9554/PCA9554A open-drain interrupt 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. The power-on reset sets the registers to
their default values and initializes the device state machine.
Three hardware pins (A0, A1, A2) vary the fixed I2C-bus address and allow up to eight
devices to share the same I2C-bus/SMBus. The PCA9554A is identical to the PCA9554
except that the fixed I2C-bus address is different allowing up to sixteen of these devices
(eight of each) on the same I2C-bus/SMBus.
2.
Features and benefits
Operating power supply voltage range of 2.3 V to 5.5 V
5 V tolerant I/Os
Polarity Inversion register
Active LOW interrupt output
Low standby current
Noise filter on SCL/SDA inputs
No glitch on power-up
Internal power-on reset
8 I/O pins which default to 8 inputs
0 Hz to 400 kHz clock frequency
PCA9554; PCA9554A
8-bit I2C-bus and SMBus I/O port with interrupt
Rev. 9 — 19 March 2013
Product data sheet
相关PDF资料 |
PDF描述 |
|---|---|
| PCA9507D,112 | IC I/O EXPANDER I2C 24B 8SOIC |
| PCA9554ABS3,118 | IC I/O EXPANDER I2C 8B 16HVQFN |
| PCA9554BS3,118 | IC I/O EXPANDER I2C 8B 16HVQFN |
| PCA9557D,118 | IC I/O EXPANDER I2C 8B 16SOIC |
| PCA9557PW,112 | IC I/O EXPANDER I2C 8B 16TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PCA9554ATS-T | 功能描述:I2C 接口集成电路 I2C I/O EXPANDER GP RoHS:否 制造商:NXP Semiconductors 电源电压-最大:5.5 V 电源电压-最小:2.3 V 最大工作频率:400 KHz 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-16 |
| PCA9554B | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low-voltage 8-bit I2C-bus and SMBus low power I/O port with interrupt, weak pull-up |
| PCA9554BBS | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low-voltage 8-bit I2C-bus and SMBus low power I/O port with interrupt, weak pull-up |
| PCA9554BBSHP | 功能描述:接口-I/O扩展器 8b I2C/SMBus IO Port I2C Fixed Address RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| PCA9554BPW | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low-voltage 8-bit I2C-bus and SMBus low power I/O port with interrupt, weak pull-up |
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