方案
设计
I/O Expanders | PCA9655E
概览
PCA9535E 通过 I2C 总线和 SMBus 提供 16 位通用并行输入/输出 (GPIO) 扩展。 PCA9535E 包括两个 8 位配置输入或输出选项；输入、输出和极性反向（有效高电平或有效低电平运行）寄存器。通电时，所有 I/O 均默认为输入。每个 I/O 均可通过写入相应的 I/O 配置位配置为输入或输出。每个输入或输出的数据均保留在其相应输入或输出寄存器中。极性反向寄存器可用于在读取寄存器时对极性进行反向。所有寄存器均可由主系统读取。 PCA9655E 提供开漏中断输出，当任何输入状态与其相应的输入端口寄存器状态不同时则会激活。该中断输出用于向主系统指示输出状态已发生改变。电源接通重置会将寄存器设置为其默认值，并启动器件状态机。 三个硬件引脚（AD0、AD1、AD2）用于配置该器件的 I2C 总线从地址。允许最多 64 个器件共享相同的 I2C 总线和 SMBus。
应用
- Input/output Port Expansion for Extended Addressing Capability
终端产品
- Keyboards
特性
- VCC Operating Range: 1.65 V to 5.5 V
- SDA Sink Capability: 30 mA
- 5.5 V Tolerant I/Os
- Polarity Inversion Register
- Active LOW Interrupt Output
- Low Standby Current
- Noise Filter on SCL/SDA Inputs
- No Glitch on Powerup
- Internal Poweron Reset
- 64 Programmable Slave Addresses Using Three Address Pins
- 16 I/O Pins Which Default to 16 Inputs
- I2C SCL Clock Frequencies Supported:Standard Mode: 100 kHz/Fast Mode: 400 kHz/Fast Mode +: 1 MHz
- ESD Performance: 2000 V Human Body Model,200 V Machine Model
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产品
PCA9655EDWR2G
Active
Pb
A
H
P
SOIC−24 WB
3
260
REEL
1000
Y
16
8 Slave ID Addresses
1.65
5.5
Yes
Yes
No
25
$1.4209
More Details
PCA9655EDTR2G
Active
Pb
A
H
P
TSSOP-24
1
260
REEL
2500
Y
16
8 Slave ID Addresses
1.65
5.5
Yes
Yes
No
25
$1.3123
More Details
PCA9655EMTTXG
Active
Pb
A
H
P
QFN-24
1
260
REEL
3000
Y
16
8 Slave ID Addresses
1.65
5.5
Yes
Yes
No
25
$1.2599
More Details
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