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| 型號： | PCA9674ABS |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | I2C/I2S |
| 英文描述： | Remote 8-bit I-O expander for Fm+ I2C-bus with interrupt |
| 封裝： | PCA9674ABS<SOT758-1 (HVQFN16)|<<http://www.nxp.com/packages/SOT758-1.html<1<Always Pb-free,;PCA9674AD<SOT162-1 (SO16)|<<http://www.nxp.com/packages/SOT162-1.html<1< |
| 文件頁數(shù)： | 18/32頁 |
| 文件大?。?/td> | 299K |
| 代理商： | PCA9674ABS |
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PCA9674_PCA9674A
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 29 September 2011
18 of 32
NXP Semiconductors
PCA9674; PCA9674A
Remote 8-bit I/O expander for Fm+ I
2
C-bus with interrupt
10. Application design-in information
10.1 Bidirectional I/O expander applications
In the 8-bit I/O expander application shown in
Figure 19
, P0 and P1 are inputs, and P2 to
P7 are outputs. When used in this configuration, during a write, the input (P0 and P1)
must be written as HIGH so the external devices fully control the input ports. The desired
HIGH or LOW logic levels may be written to the I/Os used as outputs (P2 to P7). During a
read, the logic levels of the external devices driving the input ports (P0 and P1) and the
previous written logic level to the output ports (P2 to P7) will be read.
The GPIO also has an interrupt line (INT) that can be connected to the interrupt logic of
the microprocessor. By sending an interrupt signal on this line, the remote I/O informs the
microprocessor that there is incoming data or a change of data on its ports without having
to communicate via the I
2
C-bus.
10.2 High current-drive load applications
The GPIO has a maximum sinking current of 25 mA per bit. In applications requiring
additional drive, two port pins in the same octal may be connected together to sink up to
50 mA current. Both bits must then always be turned on or off together. Up to 8 pins (one
octal) can be connected together to drive 200 mA.
Fig 19. Bidirectional I/O expander application
002aac123
V
DD
temperature sensor
battery status
control for latch
control for switch
control for audio
control for camera
control for MP3
P0
P1
P2
P3
P4
P5
P6
P7
V
DD
SDA
SCL
INT
AD0
AD1
AD2
CORE
PROCESSOR
V
DD
Fig 20. High current-drive load application
002aac124
V
DD
P0
P1
P2
P3
P4
P5
P6
P7
V
DD
SDA
SCL
INT
AD0
AD1
AD2
CORE
PROCESSOR
V
DD
LOAD
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9674ABS,118 | 功能描述:接口-I/O擴展器 8-BIT I2C FM+ QB RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| PCA9674ABS,118-CUT TAPE | 制造商:NXP 功能描述:PCA9674 Series 1 MHz 8 bit I/O Expander Fm + I2C Bus with Interrupt - HVQFN-16 |
| PCA9674ABS-T | 功能描述:接口-I/O擴展器 8-BIT I2C FM+ QB GPIO RST PU RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| PCA9674AD | 功能描述:接口-I/O擴展器 8-BIT I2C FM+ QB GPIO INT PU RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| PCA9674AD,512 | 功能描述:接口-I/O擴展器 8-BIT I2C FM+ QB RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
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