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參數(shù)資料
| 型號： | PCA9538 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 8-bit I2C and SMBus low power I/O port with interrupt and reset |
| 中文描述： | 8位I2C和SMBus低功率的I / O端口中斷和復(fù)位 |
| 文件頁數(shù)： | 5/18頁 |
| 文件大?。?/td> | 197K |
| 代理商： | PCA9538 |
Philips Semiconductors
8-bit I
2
C and SMBus low power I/O port
with interrupt and reset
Product data sheet
PCA9538
2004 Oct 05
5
SIMPLIFIED SCHEMATIC OF I/O0 TO I/O7
WRITE PULSE
DATA FROM
SHIFT REGISTER
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
SU01784
Q
Q
Q
Q
TO INT
Q1
Q2
V
DD
ESD PROTECTION DIODE
ESD PROTECTION DIODE
I/O0 TO I/O7
V
SS
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. 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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| PCA9545A | 4-channel I2C switch with interrupt logic and reset |
| PCA9545 | 4-channel I2C switch with interrupt logic and reset |
| PCA9545D | 4-channel I2C switch with interrupt logic and reset |
| PCA9545PW | 4-channel I2C switch with interrupt logic and reset |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9538_1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:REMOTE 8-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS |
| PCA9538A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low-voltage 8-bit I2C-bus I/O port with interrupt and reset |
| PCA9538ABS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low-voltage 8-bit I2C-bus I/O port with interrupt and reset |
| PCA9538ABSHP | 功能描述:接口-I/O擴展器 8bit I2C IO Port 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(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| PCA9538APW | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low-voltage 8-bit I2C-bus I/O port with interrupt and reset |
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