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PCA9557

Selection guide

Datasheet

PCA9557
(Product Specification)
11-Jun-08, 26 pages, 154 kB

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PCA9557 - 8-bit I2C-bus and SMBus I/O port with reset

General description
Features
Products/packages
Quality/reliability/chemical content
Pricing/ordering/availability
Samples
Discontinued information
Applications
Block diagrams/pinning
Design support
Parametrics/similar products
Print/email
Disclaimers
All information hereunder is subject to the subsequent disclaimers

General description

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 master can enable the PCA9557's I/O as either input or output by writing to the configuration register. The system master can also invert the PCA9557 inputs by writing to the active HIGH polarity inversion register. Finally, the system master 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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Features

  • Lower voltage, higher performance migration path for the PCA9556
  • 8 general purpose input/output expander/collector
  • Input/output configuration register
  • Active HIGH polarity inversion register
  • I2C-bus and SMBus interface logic
  • Internal power-on reset
  • Noise filter on SCL/SDA inputs
  • Active LOW reset input
  • 3 address pins allowing up to 8 devices on the I2C-bus/SMBus
  • High-impedance open-drain on IO0
  • No glitch on power-up
  • Power-up with all channels configured as inputs
  • Low standby current
  • Operating power supply voltage range of 2.3 V to 5.5 V
  • 5 V tolerant inputs/outputs
  • 0 kHz to 400 kHz clock frequency
  • ESD protection exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
  • Three packages offered: SO16, TSSOP16, HVQFN16

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Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
PCA9557BSPCA9557BS,1189352 727 75118Volume productionSOT629-1
(HVQFN16) 		Reel Pack, SMD, 13"Standard Marking
PCA9557DPCA9557D,1129352 706 74112Volume productionSOT109TubeStandard Marking
PCA9557DPCA9557D,1189352 706 74118Volume productionSOT109Reel Pack, SMD, 13"Standard Marking
PCA9557D/DGPCA9557D/DG,1189352 858 92118Volume productionSOT109Reel Pack, SMD, 13"Standard Marking
PCA9557D/GPCA9557D/G,1189352 785 87118DevelopmentSOT109Reel Pack, SMD, 13"Standard Marking
PCA9557PWPCA9557PW,1129352 706 69112Volume productionSOT403-1
(TSSOP16) 		TubeStandard Marking
PCA9557PWPCA9557PW,1189352 706 69118Volume productionSOT403-1
(TSSOP16) 		Reel Pack, SMD, 13"Standard Marking
PCA9557PW/GPCA9557PW/G,1189352 764 27118Volume productionSOT403-1
(TSSOP16) 		Reel Pack, SMD, 13"Standard Marking

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Quality/reliability/chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree Conversion dateRHFIRF (FIT)MTBF (hours)MSL
PCA9557BSPCA9557BS,118PCA9557BS
Always Pb-free
PCA9557DPCA9557D,112PCA9557D
week 6, 2004
PCA9557DPCA9557D,118PCA9557D
week 6, 2004
PCA9557D/DGPCA9557D/DG,118PCA9557D_DG
Always Pb-free
PCA9557D/GPCA9557D/G,118PCA9557D_G
week 13, 2005
PCA9557PWPCA9557PW,112PCA9557PW
week 48, 2004
PCA9557PWPCA9557PW,118PCA9557PW
week 48, 2004
PCA9557PW/GPCA9557PW/G,118PCA9557PW_G
week 13, 2005

Quality and reliability disclaimer

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Pricing/ordering/availability

Type numberOrdering code(12NC)Orderable part numberIndicative price/unit($)RegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
PCA9557BS9352 727 75118  PCA9557BS,118  0.9400NAMOUSER ELECTRONICS5,322 11/20/2009Buy onlineOrder samples
    NADIGI-KEY CORPORATION21,741 11/20/2009Buy online 
    NAMOUSER ELECTRONICS5,322 11/20/2009Buy online 
PCA9557D9352 706 74112  PCA9557D,112  0.9400NAMOUSER ELECTRONICS514 11/20/2009Buy onlinenot available
    NADIGI-KEY CORPORATION1,215 11/20/2009Buy online 
    NAMOUSER ELECTRONICS514 11/20/2009Buy online 
PCA9557D9352 706 74118  PCA9557D,118  0.9400NAMOUSER ELECTRONICS2,500 11/20/2009Buy onlineOrder samples
    NAMOUSER ELECTRONICS2,500 11/20/2009Buy online 
    NAFUTURE ELECTRONICS2,500 11/19/2009Buy online 
PCA9557D/DG9352 858 92118  PCA9557D/DG,118        not available
PCA9557D/G9352 785 87118  PCA9557D/G,118        not available
PCA9557PW9352 706 69112  PCA9557PW,112  1.1100      not available
PCA9557PW9352 706 69118  PCA9557PW,118  0.9400NADIGI-KEY CORPORATION42 11/20/2009Buy onlineOrder samples
PCA9557PW/G9352 764 27118  PCA9557PW/G,118        not available
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Block diagrams/pinning

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Parametrics/similar products

Type numberPackageOperating
temp.(Cel)		# of BitsSource Current per bit(mA)I²C-bus(kHz)Operating voltage(VDC)Max Sink Current per bit(mA)# of AddressesMax Sink Current
per package(mA)		Reset input pin
PCA9557BSSOT629-1
(HVQFN16)		-40~858104002.3~5.5258100yes
PCA9557DSOT109
-40~858104002.3~5.5258100yes
PCA9557D/DGSOT109
-40~858104002.3~5.5258100yes
PCA9557D/GSOT109
-40~858104002.3~5.5258100yes
PCA9557PWSOT403-1
(TSSOP16)		-40~858104002.3~5.5258100yes
PCA9557PW/GSOT403-1
(TSSOP16)		-40~858104002.3~5.5258100yes


Similar products
PCA9557 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.

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