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PCF8574A

更新时间： 2024-09-22 22:44:31
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
16页 436K
描述
REMOTE 8BIT I/O EXPANDER FOR I2C BUS

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中文翻译

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PCF8574A 数据手册

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SCPS068C - JULY 2001 − REVISED JANUARY 2004  
D
D
D
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Low Standby-Current Consumption of  
D
D
Latched Outputs With High-Current Drive  
Capability for Directly Driving LEDs  
10 µA Maximum  
2
I C to Parallel-Port Expander  
Latch-Up Performance Exceeds 100 mA Per  
JESD 78, Class II  
Open-Drain Interrupt Output  
Compatible With Most Microcontrollers  
RGY PACKAGE  
(TOP VIEW)  
DGV OR PW PACKAGE  
(TOP VIEW)  
DW OR N PACKAGE  
(TOP VIEW)  
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10  
V
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
A0  
A1  
A2  
P0  
P1  
P2  
P3  
GND  
1
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3
4
5
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7
8
16  
15  
14  
13  
12  
11  
10  
9
INT  
SCL  
NC  
P7  
P6  
NC  
P5  
P4  
GND  
P3  
NC  
P2  
CC  
1
20  
SDA  
SCL  
INT  
P7  
P6  
P5  
19  
2
3
4
5
6
7
8
9
SCL  
NC  
SDA  
P6  
NC  
P5  
P4  
GND  
P3  
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17  
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15  
14  
13  
12  
SDA  
V
CC  
A0  
V
CC  
A0  
A1  
A1  
NC  
A2  
P4  
NC  
A2  
P0  
NC  
P2  
P1  
10  
11  
NC − No internal connection  
NC − No internal connection  
description/ordering information  
2
This 8-bit input/output (I/O) expander for the two-line bidirectional bus (I C) is designed for 2.5-V to 6-V V  
operation.  
CC  
2
The PCF8574 provides general-purpose remote I/O expansion for most microcontroller families via the I C  
interface [serial clock (SCL), serial data (SDA)].  
The device features an 8-bit quasi-bidirectional I/O port (P0−P7), including latched outputs with high-current  
drive capability for directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without  
the use of a data-direction control signal. At power on, the I/Os are high. In this mode, only a current source to  
V
is active. An additional strong pullup to V  
allows fast rising edges into heavily loaded outputs. This device  
CC  
CC  
turns on when an output is written high and is switched off by the negative edge of SCL. The I/Os should be  
high before being used as inputs.  
ORDERING INFORMATION  
ORDERABLE  
PART NUMBER  
TOP-SIDE  
MARKING  
†
PACKAGE  
T
A
QFN − RGY  
PDIP − N  
Tape and reel  
Tube  
PCF8574RGYR  
PCF8574N  
PF574  
PCF8574N  
Tube  
PCF8574DW  
PCF8574DWR  
PCF8574PWR  
−40°C to 85°C SOIC − DW  
PCF8574  
Tape and reel  
Tape and reel  
TSSOP − PW  
TVSOP − DGV  
PF574  
PF574  
Tape and reel  
PCF8574DGVR  
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design  
guidelines are available at www.ti.com/sc/package.  
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.  
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Copyright 2004, Texas Instruments Incorporated  
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...16

中文翻译

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PCF8574A 替代型号

型号 品牌 替代类型 描述 数据表
PCF8574APWG4 TI

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