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參數(shù)資料
| 型號(hào)： | 935262899118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8 I/O, PIA-GENERAL PURPOSE, PDSO16 |
| 封裝： | PLASTIC, TSSOP-16 |
| 文件頁(yè)數(shù)： | 5/14頁(yè) |
| 文件大?。?/td> | 144K |
| 代理商： | 935262899118 |
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PCA9556
PCA9556; Octal SMBus Registered Interface
The PCA9556 is a silicon CMOS circuit which provides parallel input/output expansion for SMBus
applications. The PCA9556 consists of an 8-bit input port register, 8-bit output port register, and an SMBus
interface. It has low current consumption and a high impedance open drain output pin, I/O0.
The SMBus system master can reset the PCA9556 in the event of a timeout by asserting a LOW on the
reset input. The SMBus system master can also invert the PCA9556 inputs by writing to their active HIGH
polarity inversion bits. Finally, the SMBus system master can enable the PCA9556’
outputs by writing to their I/O configuration bits.
The power-on reset sets the registers to their default values and initializes the SMBus state machine. The
RESET pin causes the same reset/initialization to occur without depowering the part.
l
SMBus compliance with fixed 3.3V voltage levels
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Operating power supply voltage range of 3.0V - 3.6V
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Active high polarity inverter register
l
Write protect register
l
Active low reset pin
l
Low leakage current on power-down
l
Noise filter on SCL/SDA inputs
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No glitch on power-up
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Internal power-on reset
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8 I/O pins which default to 8 inputs
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High impedance open drain on I/O
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