参数资料
型号: PCA9554ADBRG4
厂商: TEXAS INSTRUMENTS INC
元件分类: 微控制器/微处理器
英文描述: 8 I/O, PIA-GENERAL PURPOSE, PDSO16
封装: GREEN, PLASTIC, SSOP-16
文件页数: 15/39页
文件大小: 985K
代理商: PCA9554ADBRG4
APPLICATION INFORMATION
A2
A1
SDA
SCL
INT
GND
P6
P0
P1
P2
P3
P4
P5
P7
INT
GND
VCC
(5 V)
VCC
10 kW
2 kW
Master
Controller
PCA9554A
INT
RESET
Subsystem 2
(e.g., Counter)
Subsystem 3
(e.g., Alarm System)
ALARM
Controlled Device
(e.g., CBT Device)
ENABLE
A
B
VCC
Subsystem 1
(e.g., Temperature Sensor)
SDA
SCL
A0
SCPS127D – SEPTEMBER 2006 – REVISED AUGUST 2008........................................................................................................................................... www.ti.com
Figure 14 shows an application in which the PCA9554A can be used.
A.
Device address is configured as 0111000 for this example.
B.
P0, P2, and P3 are configured as outputs.
C.
P1, P4, and P5 are configured as inputs.
D.
P6 and P7 are not used and have internal 100-k
pullup resistors to protect them from floating.
Figure 14. Typical Application
22
Copyright 2006–2008, Texas Instruments Incorporated
Product Folder Link(s): PCA9554A
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