参数资料
型号: PCA9670PW,112
厂商: NXP Semiconductors
文件页数: 9/35页
文件大小: 0K
描述: IC I/O EXPANDER I2C 8B 16TSSOP
产品培训模块: LED Controllers
I²C Bus Fundamentals
特色产品: NXP - I2C Interface
标准包装: 96
接口: I²C
输入/输出数: 8
中断输出:
频率 - 时钟: 1MHz
电源电压: 2.3 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 16-TSSOP
包装: 管件
包括: POR
产品目录页面: 826 (CN2011-ZH PDF)
其它名称: 568-4189-5
935282716112
PCA9670PW
PCA9670
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 3 — 30 May 2013
17 of 35
NXP Semiconductors
PCA9670
Remote 8-bit I/O expander for Fm+ I2C-bus with reset
{
<S> <0100 0001> <ACK> <1010 0010> <NACK> <P> //Read PCA9670 data
If (P0 == 0) //Temperature sensor activated
{
// write to PCA9670 with data 0010 1011b to turn on LED (P7), on Switch (P3)
and keep P[1:0] as input ports.
<S> <0100 0000> <ACK> <0010 1011> <ACK> <P> // Write to PCA9670
Exit the loop;
}
10.3 High current-drive load applications
The GPIO has a minimum guaranteed sinking current of 25 mA per bit at 5.5 V. In
applications requiring additional drive, two port pins may be connected together to sink up
to 50 mA current. Both bits must then always be turned on or off together. Up to 8 pins can
be connected together to drive 200 mA, which is the device recommended total limit.
Each pin needs its own limiting resistor as shown in Figure 20 to prevent damage to the
device should all ports not be turned on at the same time.
10.4 Migration path
NXP offers new, more capable drop-in replacements for the PCA9670 in newer
space-saving packages.
PCA9670 replaces the interrupt output of the PCA9674 with hardware reset input to retain
the maximum number of addresses. PCA9672 replaces address A2 of the PCA9674 with
hardware reset input to retain the interrupt, but limit the number of addresses.
Fig 20. High current-drive load application
002aac299
VDD
P0
P1
P2
P3
P4
P5
P6
P7
VDD
SDA
SCL
RESET
AD0
AD1
AD2
CORE
PROCESSOR
VDD
LOAD
Table 5.
PCA9670 migration path
Type number
I2C-bus
frequency
Voltage range
Number of
addresses
per device
Interrupt
Reset
Total package
sink current
PCF8574/74A
100 kHz
2.5 V to 6 V
8
yes
no
80 mA
PCA8574/74A
400 kHz
2.3 V to 5.5 V
8
yes
no
200 mA
PCA9674/74A
1 MHz Fm+
2.3 V to 5.5 V
64
yes
no
200 mA
PCA9670
1 MHz Fm+
2.3 V to 5.5 V
64
no
yes
200 mA
PCA9672
1 MHz Fm+
2.3 V to 5.5 V
16
yes
200 mA
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PCA9671BS,118 功能描述:接口-I/O扩展器 REMOTE 16BIT GPIO RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel
PCA9671BS-T 功能描述:接口-I/O扩展器 REMOTE 16BIT GPIO FM+I2C-RESET RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel