參數(shù)資料
型號(hào): PCA9554TS,112
廠商: NXP Semiconductors
文件頁數(shù): 35/35頁
文件大小: 0K
描述: IC I/O EXPANDER I2C 8B 20SSOP
標(biāo)準(zhǔn)包裝: 75
接口: I²C,SM 總線
輸入/輸出數(shù): 8
中斷輸出:
頻率 - 時(shí)鐘: 400kHz
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: 20-LSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 20-SSOP
包裝: 管件
包括: POR
其它名稱: 935276771112
PCA9554TS
PCA9554TS-ND
PCA9554_9554A
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 9 — 19 March 2013
9 of 35
NXP Semiconductors
PCA9554; PCA9554A
8-bit I2C-bus and SMBus I/O port with interrupt
6.3 Interrupt output
The open-drain interrupt output is activated when one of the port pins change state and
the pin is configured as an input. The interrupt is deactivated when the input returns to its
previous state or the Input Port register is read.
Note that changing an I/O from and output to an input may cause a false interrupt to occur
if the state of the pin does not match the contents of the Input Port register.
6.4 I/O port
When an I/O is configured as an input, FETs Q1 and Q2 are off, creating a
high-impedance input with a weak pull-up (100 k
typ.) to V
DD. The input voltage may be
raised above VDD to a maximum of 5.5 V.
If the I/O is configured as an output, then either Q1 or Q2 is enabled, depending on the
state of the Output Port register. Care should be exercised if an external voltage is applied
to an I/O configured as an output because of the low-impedance paths that exist between
the pin and either VDD or VSS.
Remark: At power-on reset, all registers return to default values.
Fig 8.
Simplified schematic of IO0 to IO7
VDD
IO0 to IO7
output port
register data
configuration
register
DQ
CK
Q
data from
shift register
write configuration
pulse
output port
register
DQ
CK
write pulse
polarity inversion
register
DQ
CK
data from
shift register
write polarity
pulse
input port
register
DQ
CK
read pulse
input port
register data
polarity inversion
register data
002aac493
FF
data from
shift register
FF
Q1
Q2
VSS
to INT
100 k
Ω
相關(guān)PDF資料
PDF描述
PCA9555N,112 IC I/O EXPANDER I2C 16B 24DIP
PCA9556PW,112 IC I/O EXPANDER I2C 8B 16TSSOP
PCA9557D/DG,118 IC I/O PORT I2C/SMBUS 16-SOIC
PCA9574HR,115 IC I/O EXPANDER I2C 8B 16HXQFN
PCA9575PW1,118 IC I/O EXPANDER I2C 16B 24TSSOP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCA9554TS-T 功能描述:I2C 接口集成電路 8-BIT I2C FM TP GPIO INT PU RoHS:否 制造商:NXP Semiconductors 電源電壓-最大:5.5 V 電源電壓-最小:2.3 V 最大工作頻率:400 KHz 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-16
PCA9554TS-T,118 制造商:NXP Semiconductors 功能描述:
PCA9554U 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit I2C-bus and SMBus I/O port with interrupt
PCA9554U,029 功能描述:I2C 接口集成電路 PCA9554U/UNCASED/PUT RoHS:否 制造商:NXP Semiconductors 電源電壓-最大:5.5 V 電源電壓-最小:2.3 V 最大工作頻率:400 KHz 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-16
PCA9555 制造商:TI 制造商全稱:Texas Instruments 功能描述:REMOTE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS