PCA9557PW Product Information|NXP

Buy Options

Operating Features

ParameterValue
No of bits
8
VDD [min]
2.3
VDD [max]
5.5
Over volt tolerant
Y
No of supplies
1
Standby current [typ] (µA)
0.25
Max Sink Current per bit (mA)
25
Max Sink Current, per package (mA)
100
Source Current per bit (mA)
20
ParameterValue
Reset input pin
Y
Output mode
Totem Pole/Open Drain
Input mode: invert option
Y
I2C-bus (kHz)
400
Footprint body and leads
33.66
Operating Temperature (°C)
-40~85
No of Addresses
8
Remark
Only bit 0 is open drain

Environmental

Part/12NCPbFreeEU RoHSHalogen FreeRHF IndicatorREACH SVHCWeight (mg)
PCA9557PW,118(935270669118)
Yes
Yes
Certificate Of Analysis (CoA)
Yes
DREACH SVHC
54.0
PCA9557PW/G,118(935276427118)
Yes
Yes
Yes
DREACH SVHC
52.41

Quality

Part/12NCSafe Assure Functional SafetyMoisture Sensitivity Level (MSL)Peak Package Body Temperature (PPT) (C°)FITMTBFIR
Lead SolderingLead Free SolderingLead SolderingLead Free Soldering
PCA9557PW,118
(935270669118)
No
1
1
240
260
2.0
5.0E8
0.0
PCA9557PW/G,118
(935276427118)
No
1
1
240
260
2.0
5.0E8
0.0

Shipping

Part/12NCHarmonized Tariff (US)Disclaimer
PCA9557PW,118
(935270669118)
854239
PCA9557PW/G,118
(935276427118)
854239

Discontinued and Replacement Part Data

Part/12NCDiscontinuance NoticeLast Time Buy DateLast Time Delivery DateReplacement
PCA9557PW/G,118
(935276427118)
-
2001-01-30
2001-01-31
PCA9557PW,118
(935270669118)

More about PCA9557

The PCA9557 is a silicon CMOS circuit which provides parallel input/output expansion for SMBus and I²C-bus applications. The PCA9557 consists of an 8-bit input port register, 8-bit output port register, and an I²C-bus/SMBus interface. It has low current consumption and a high-impedance open-drain output pin, IO0.

The system controller can enable the PCA9557's I/O as either input or output by writing to the configuration register. The system controller can also invert the PCA9557 inputs by writing to the active HIGH polarity inversion register. Finally, the system controller can reset the PCA9557 in the event of a time-out by asserting a LOW in the reset input.

The power-on reset puts the registers in their default state and initializes the I²C-bus/SMBus state machine. The RESET pin causes the same reset/initialization to occur without de-powering the part.

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