參數(shù)資料
型號(hào): 935270674118
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: 3.90 MM, PLASTIC, MS-012, SOT-109-1, SO-16
文件頁(yè)數(shù): 15/20頁(yè)
文件大?。?/td> 153K
代理商: 935270674118
Philips Semiconductors
Product data
PCA9557
8-bit I2C and SMBus I/0 port with reset
2002 Dec 13
4
BLOCK DIAGRAM
POWER-ON
RESET
INPUT
FILTER
I2C/SMBus
CONTROL
INPUT/
OUTPUT
PORTS
WRITE pulse
READ pulse
A0
A1
A2
SCL
SDA
VDD
VSS
8-BIT
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
SW00827
RESET
PCA9557
Figure 3. Block diagram
SYSTEM DIAGRAM
SW00794
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
6
7
9
10
11
12
13
14
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
Input Port
Polarity Inversion
Configuration
Output Port
RESET
SCL
SDA
A2
A1
A0
15
1
2
5
4
3
VCC= 16
GND = 8
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
I2C/SMBus
Interface
logic
or
1.1 K
1.1 K
1.6 K
1.6 K
1.1 K
1.1 K
1.1 K
Figure 4. System diagram
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