參數(shù)資料
型號(hào)： PCA9554TS,112
廠商： NXP Semiconductors
文件頁(yè)數(shù)： 34/35頁(yè)
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： 是
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
8 of 35
NXP Semiconductors
PCA9554; PCA9554A
8-bit I2C-bus and SMBus I/O port with interrupt
6.1.4 Register 2 - Polarity Inversion register
This register allows the user to invert the polarity of the Input Port register data. If a bit in
this register is set (written with ‘1’), the corresponding Input Port data is inverted. If a bit in
this register is cleared (written with a ‘0’), the Input Port data polarity is retained.
6.1.5 Register 3 - Configuration register
This register configures the directions of the I/O pins. If a bit in this register is set, the
corresponding port pin is enabled as an input with high-impedance output driver. If a bit in
this register is cleared, the corresponding port pin is enabled as an output. At reset, the
I/Os are configured as inputs with a weak pull-up to VDD.
6.2 Power-on reset
When power is applied to VDD, an internal Power-On Reset (POR) holds the
PCA9554/PCA9554A in a reset condition until VDD has reached VPOR. At that point, the
reset condition is released and the PCA9554/PCA9554A registers and state machine will
initialize to their default states. Thereafter, VDD must be lowered below 0.2 V to reset the
device.
For a power reset cycle, VDD must be lowered below 0.2 V and then restored to the
operating voltage.
Table 7.
Register 2 - Polarity Inversion register bit description
Legend: * default value.
Bit
Symbol
Access
Value
Description
7
N7
R/W
0*
inverts polarity of Input Port register data
0 = Input Port register data retained (default value)
1 = Input Port register data inverted
6N6
R/W
0*
5N5
R/W
0*
4N4
R/W
0*
3N3
R/W
0*
2N2
R/W
0*
1N1
R/W
0*
0N0
R/W
0*
Table 8.
Register 3 - Configuration register bit description
Legend: * default value.
Bit
Symbol
Access
Value
Description
7
C7
R/W
1*
configures the directions of the I/O pins
0 = corresponding port pin enabled as an output
1 = corresponding port pin configured as input
(default value)
6C6
R/W
1*
5C5
R/W
1*
4C4
R/W
1*
3C3
R/W
1*
2C2
R/W
1*
1C1
R/W
1*
0C0
R/W
1*
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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
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