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PCA9557 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
封装:
TSSOP-16
描述:
具有复位和配置寄存器的远程 8 位 I2C 和 SMBus 低功率 I/O 扩展器
Pictures:
3D模型
符号图
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引脚图
产品图
页面导航:
引脚图在P3Hot
典型应用电路图在P12P21P22
原理图在P12P13P14
封装尺寸在P24P26P27
标记信息在P24P25
封装信息在P23P24P25P26P27
技术参数、封装参数在P4
应用领域在P39
电气规格在P5P21
导航目录
PCA9557数据手册
Page:
of 39 Go
若手册格式错乱，请下载阅览PDF原文件
RGVPACKAGE
(TOP VIEW)
5
6
7
8
9
10
11
12
13
14
1516
1
2
3
4
A1
A2
P0
A0
P4
P7
SCL
SDA
V
CC
RESET
P6
P1
GND
P3
P2
P5
D,DB,DGV,ORPWPACKAGE
(TOP VIEW)
5
6
7
8 9
10
11
12
13
14
15
16
1
2
3
4
P1
A1
A2
P0
A0
GND
SCL
SDA
V
CC
P4
P7
RESET
P3
P6
P2
P5
RGYPACKAGE
(TOP VIEW)
5
6
7 10
11
12
13
14
15
16
1
2
3
4
SDA
SCL
V
CC
A1
A2
P0
A0
P1
8 9
GND
P2
P4
P7
RESET
P6
P3
P5
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PCA9557
SCPS133J –DECEMBER 2005–REVISED JUNE 2014
PCA9557 Remote 8-Bit I
2
C and SMBus Low-Power I/O Expander With Reset and
Configuration Registers
1 Features 2 Description
This 8-bit I/O expander for the two-line bidirectional
1
• Low Standby Current Consumption of 1 μA Max
bus (I
2
C) is designed for 2.3-V to 5.5-V V
CC
• I
2
C to Parallel Port Expander
operation. The device provides general-purpose
• Operating Power-Supply Voltage Range of 2.3 V
remote I/O expansion for most microcontroller
to 5.5 V
families via the I
2
C interface [serial clock (SCL) and
serial data (SDA)].
• 5-V Tolerant I/O Ports
• 400-kHz Fast I
2
C Bus
The PCA9557 consists of one 8-bit configuration
(input or output selection), input port, output port, and
• Three Hardware Address Pins Allow for Use of up
polarity inversion (active-high) registers. At power on,
to Eight Devices on I
2
C/SMBus
the I/Os are configured as inputs. However, the
• Lower-Voltage Higher-Performance Migration
system master can enable the I/Os as either inputs or
Path for PCA9556
outputs by writing to the I/O configuration bits. The
data for each input or output is kept in the
• Input/Output Configuration Register
corresponding input or output register. The polarity of
• Polarity Inversion Register
the input port register can be inverted with the polarity
• Active-Low Reset Input
inversion register. All registers can be read by the
• Internal Power-On Reset
system master.
• High-Impedance Open Drain on P0
The device outputs (latched) have high-current drive
• Power Up With All Channels Configured as Inputs
capability for directly driving LEDs. The device has
low current consumption.
• No Glitch on Power Up
• Noise Filter on SCL/SDA Inputs
Device Information
(1)
• Latched Outputs With High Current Drive
PART NUMBEr PACKAGE BODY SIZE (NOM)
Maximum Capability for Directly Driving LEDs
SSOP (16) 6.20 mm × 5.30 mm
PCA9557
• Latch-Up Performance Exceeds 100 mA Per
VQFN (16) 4.00 mm × 4.00 mm
JESD 78, Class II
(1) For all available packages, see the orderable addendum at
• ESD Protection Exceeds JESD 22
the end of the datasheet.
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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