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參數資料
| 型號： | PCA9554A |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 8-bit I2C and SMBus I/O port with interrupt |
| 中文描述： | 8位I2C和SMBus I / O端口的中斷 |
| 文件頁數： | 6/20頁 |
| 文件大小： | 183K |
| 代理商： | PCA9554A |
Philips Semiconductors
Product data sheet
PCA9554/PCA9554A
8-bit I
2
C and SMBus I/O port with interrupt
2004 Sep 30
6
SIMPLIFIED SCHEMATIC OF I/O0 TO I/O7
WRITE PULSE
DATA FROM
SHIFT REGISTER
V
DD
I/O0 TO I/O7
V
SS
WRITE
CONFIGURATION
PULSE
D
C
K
FF
Q
D
C
K
Q
FF
D
C
K
Q
FF
D
C
K
Q
FF
INPUT PORT
REGISTER
POLARITY
INVERSION
REGISTER
OUTPUT
PORT
REGISTER
DATA FROM
SHIFT REGISTER
DATA FROM
SHIFT REGISTER
WRITE
POLARITY
PULSE
CONFIGURATION
REGISTER
OUTPUT PORT
REGISTER DATA
INPUT PORT
REGISTER DATA
POLARITY
REGISTER DATA
READ PULSE
SU01472
Q
Q
Q
Q
TO INT
100 k
Q1
Q2
NOTE:
At Power-on Reset, all registers return to default values.
Figure 4. Simplified schematic of I/O0 to I/O7
I/O port
When an I/O is configured as an input, FETs Q1 and Q2 are off,
creating a high-impedance input with a weak pull-up (100 k
typ.) to
V
DD
. The input voltage may be raised above V
DD
to a maximum of
5.5 V.
If the I/O is configured as an output, then either Q1 or Q2 is enabled,
depending on the state of the output port register. Care should be
exercised if an external voltage is applied to an I/O configured as an
output because of the low impedance paths that exist between the
pin and either V
DD
or V
SS
.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| PCA9554ABS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit I2C and SMBus I/O port with interrupt |
| PCA9554ABS,115 | 制造商:NXP Semiconductors 功能描述: |
| PCA9554ABS,118 | 功能描述:接口-I/O擴展器 I2C I/O EXPANDER GP RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數量: 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 |
| PCA9554ABS118 | 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
| PCA9554ABS3 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit I2C-bus and SMBus I/O port with interrupt |
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