參數(shù)資料
型號: PCA9670PW,118
廠商: NXP Semiconductors
文件頁數(shù): 9/35頁
文件大?。?/td> 0K
描述: IC I/O EXPANDER I2C 8B 16TSSOP
標(biāo)準(zhǔn)包裝: 2,500
接口: I²C
輸入/輸出數(shù): 8
中斷輸出:
頻率 - 時(shí)鐘: 1MHz
電源電壓: 2.3 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 16-TSSOP
包裝: 帶卷 (TR)
包括: POR
其它名稱: 935282716118
PCA9670PW-T
PCA9670PW-T-ND
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
相關(guān)PDF資料
PDF描述
PCA9674TS,118 IC I/O EXPANDER I2C 8B 20SSOP
PCA9674ATS,118 IC I/O EXPANDER I2C 8B 20SSOP
PCA9674PW,112 IC I/O EXPANDER I2C 8B 16TSSOP
PCA9554D,118 IC I/O EXPANDER I2C 8B 16SOIC
PCA9554ATS,112 IC I/O EXPANDER I2C 8B 20SSOP
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