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PCA9554ADWR

更新时间： 2024-02-05 17:26:47
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德州仪器 - TI 输出元件
页数 文件大小 规格书
33页 650K
描述
REMOTE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

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PCA9554ADWR 数据手册

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PCA9554A  
REMOTE 8-BIT I2C AND SMBus I/O EXPANDER  
WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS  
www.ti.com  
SCPS127A–SEPTEMBER 2006–REVISED FEBRUARY 2007  
FEATURES  
•
•
•
I2C to Parallel Port Expander  
•
Power-Up With All Channels Configured as  
Inputs  
Open-Drain Active-Low Interrupt Output  
•
•
No Glitch on Power-Up  
Operating Power-Supply Voltage Range of  
2.3 V to 5.5 V  
Latched Outputs With High-Current Drive  
Maximum Capability for Directly Driving LEDs  
•
•
•
5-V Tolerant I/Os  
400-kHz Fast I2C Bus  
•
•
Latch-Up Performance Exceeds 100 mA Per  
JESD 78, Class II  
Three Hardware Address Pins Allow up to  
Eight Devices on the I2C/SMBus  
ESD Protection Exceeds JESD 22  
–
–
–
2000-V Human-Body Model (A114-A)  
200-V Machine Model (A115-A)  
•
•
•
Input/Output Configuration Register  
Polarity Inversion Register  
Internal Power-On Reset  
1000-V Charged-Device Model (C101)  
DB, DBQ, DGV, DW,  
OR PW PACKAGE  
(TOP VIEW)  
RGV PACKAGE  
(TOP VIEW)  
RGT PACKAGE  
(TOP VIEW)  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
A0  
A1  
V
CC  
16 15 14 13  
16 15 14 13  
SCL  
SDA  
SCL  
INT  
P7  
P6  
P5  
1
12  
11  
A2  
P0  
P1  
1
2
3
4
12  
A2  
P0  
P1  
P2  
SCL  
INT  
P7  
A2  
P0  
P1  
P2  
2
3
4
INT  
11  
10  
9
10 P7  
P6  
9
P2  
P6  
5
6
7
8
P3  
5
6
7
8
GND  
P4  
DESCRIPTION/ORDERING INFORMATION  
This 8-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.3-V to 5.5-V VCC operation. It  
provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial  
clock (SCL), serial data (SDA)].  
The PCA9554A consists of one 8-bit Configuration (input or output selection), Input, Output, and Polarity  
Inversion (active high or active low) registers. At power-on, the I/Os are configured as inputs with a weak pull up  
to VCC. However, the system master can enable the I/Os as either inputs or outputs by writing to the I/O  
configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The  
polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by  
the system master.  
The system master can reset the PCA9554A in the event of a timeout or other improper operation by utilizing  
the power-on reset feature which puts the registers in their default state and initializes the I2C/SMBus state  
machine.  
The PCA9554A open-drain interrupt (INT) output is activated when any input state differs from its corresponding  
Input Port register state and is used to indicate to the system master that an input state has changed.  
INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the  
remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via  
the I2C bus. Thus, the PCA9554A can remain a simple slave device.  
The device's outputs (latched) have high-current drive capability for directly driving LEDs and low current  
consumption.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
UNLESS OTHERWISE NOTED this document contains  
Copyright © 2006–2007, Texas Instruments Incorporated  
PRODUCTION DATA information current as of publication date.  
Products conform to specifications per the terms of Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
1234567...33

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PCA9554ADWR 替代型号

型号 品牌 替代类型 描述 数据表
PCA9534APW TI

完全替代

 REMOTE 8-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION
TCA9554APWR TI

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