參數(shù)資料
型號: PCA9574HR,115
廠商: NXP Semiconductors
文件頁數(shù): 5/33頁
文件大?。?/td> 0K
描述: IC I/O EXPANDER I2C 8B 16HXQFN
產(chǎn)品培訓(xùn)模塊: I²C Bus Fundamentals
標(biāo)準(zhǔn)包裝: 1
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: 1.1 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-XFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 16-UHXQFN
包裝: 標(biāo)準(zhǔn)包裝
包括: POR
產(chǎn)品目錄頁面: 826 (CN2011-ZH PDF)
其它名稱: 568-4936-6
PCA9574
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 4 — 25 April 2012
13 of 33
NXP Semiconductors
PCA9574
8-bit I2C-bus and SMBus, level translating, low volage GPIO
5. Once the right byte has been sent and correctly acknowledged, the master sends a
STOP command to end the Software Reset sequence: the PCA9574 then resets to
the default value (power-up value) and is ready to be addressed again within the
specified bus free time. If the master sends a Repeated START instead, no reset is
performed. The I2C-bus master must interpret a non-acknowledge from the PCA9574
(at any time) as a ‘Software Reset Abort’. The PCA9574 does not initiate a software
reset.
7.9 Interrupt output (INT)
The open-drain active LOW interrupt is activated when one of the port pins changes state
and the port pin is configured as an input and the interrupt on it is not masked. The
interrupt is deactivated when the port pin input returns to its previous state or the Input
Port register is read. It is highly recommended to program the MSK register, and the CFG
registers during the initialization sequence after power-up, since any change to them
during Normal mode operation may cause undesirable interrupt events to happen.
Remark: Changing an I/O from an 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. Only a read of
the Input port register that contains the bit(s) image of the input(s) that generated the
interrupt clears the interrupt condition.
7.10 Standby
The PCA9574 goes into standby when the I2C-bus is idle. Standby supply current is lower
than 1.0
μA (typical).
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PCA9574PW 功能描述:轉(zhuǎn)換 - 電壓電平 8-BIT I2C-BUS/SMBUS GPIO TRANS RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8
PCA9574PW,112 功能描述:轉(zhuǎn)換 - 電壓電平 8-BIT I2C-BUS/SMBUS RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8
PCA9574PW,118 功能描述:轉(zhuǎn)換 - 電壓電平 8-BIT I2C-BUS/SMBUS RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8
PCA9574PW-T 功能描述:轉(zhuǎn)換 - 電壓電平 8-BIT I2C-BUS/SMBUS GPIO TRANS RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8
PCA9575HF,118 功能描述:I2C 接口集成電路 16-BIT I2C-BUS SMBus LW Voltage GPIO 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