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PCA9557
Datasheet
(Product Specification)
11-Jun-08, 26 pages, 154 kB
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.
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
Products/packages
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| PCA9557BS | PCA9557BS,118 | 9352 727 75118 | Volume production | SOT629-1
(HVQFN16) | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9557D | PCA9557D,112 | 9352 706 74112 | Volume production | SOT109 | Tube | Standard Marking | |
| PCA9557D | PCA9557D,118 | 9352 706 74118 | Volume production | SOT109 | Reel Pack, SMD, 13" | Standard Marking | |
| PCA9557PW | PCA9557PW,112 | 9352 706 69112 | Volume production | SOT403-1
(TSSOP16) | Tube | Standard Marking | |
| PCA9557PW | PCA9557PW,118 | 9352 706 69118 | Volume production | SOT403-1
(TSSOP16) | Reel Pack, SMD, 13" | Standard Marking |
Quality/reliability/chemical content
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL |
|---|---|---|---|---|---|---|---|---|
| PCA9557BS | PCA9557BS,118 | PCA9557BS |
| Always Pb-free | ||||
| PCA9557D | PCA9557D,112 | PCA9557D |
| week 6, 2004 | ||||
| PCA9557D | PCA9557D,118 | PCA9557D |
| week 6, 2004 | ||||
| PCA9557PW | PCA9557PW,112 | PCA9557PW |
| week 48, 2004 | ||||
| PCA9557PW | PCA9557PW,118 | PCA9557PW |
| week 48, 2004 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Orderable part number | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|---|
| PCA9557BS | 9352 727 75118 | PCA9557BS,118 | 0.9400 | NA | DIGI-KEY CORPORATION | 21,816 | 11/6/2009 | Buy online | Order samples | |
| NA | MOUSER ELECTRONICS | 5,322 | 11/6/2009 | Buy online | ||||||
| PCA9557D | 9352 706 74112 | PCA9557D,112 | 0.9400 | NA | DIGI-KEY CORPORATION | 1,325 | 11/6/2009 | Buy online | not available | |
| NA | MOUSER ELECTRONICS | 514 | 11/6/2009 | Buy online | ||||||
| PCA9557D | 9352 706 74118 | PCA9557D,118 | 0.9400 | NA | MOUSER ELECTRONICS | 2,500 | 11/6/2009 | Buy online | Order samples | |
| NA | FUTURE ELECTRONICS | 2,500 | 11/7/2009 | Buy online | ||||||
| PCA9557PW | 9352 706 69112 | PCA9557PW,112 | 1.1100 | NA | ARROW ELECTRONICS | 5,737 | 11/6/2009 | Buy online | not available | |
| NA | FUTURE ELECTRONICS | 2,121 | 11/7/2009 | Buy online | ||||||
| NA | AVNET ELECTRONICS MARKETING | 2,163 | 11/6/2009 | Buy online | ||||||
| PCA9557PW | 9352 706 69118 | PCA9557PW,118 | 0.9400 | ASIA | WPI | 2,500 | 2500 | 11/06/2009 | Buy online | Order samples |
| NA | DIGI-KEY CORPORATION | 107 | 11/6/2009 | Buy online |
Applications
Related applications
Intelligent washing machine
PCI analog/DVB-T stereo TV receiver
LCD TV - MMS functionality
Set-top box - MMS functionality
Design support
Application Notes
AN10216_1;
I2C manual (2003-03-27)AN10216_1;
I2C manual (2003-03-27)AN10216_1;
I2C manual (2003-03-27)AN469_2;
I2C/SMBus general purpose I/O expanders (2005-01-20)
Support Documents
75016543;
An industry-leading portfolio of cost-effective, power-saving solutions for major home appliances (2008-06-01)39340011_21;
I2C-bus specification (version 2.1) (2000-01-01)UM10204_3;
I2C-bus specification and user manual (2007-06-26)UM10267_1;
PCA9698 demonstration board OM6281 (2008-09-26)Parametrics/similar products
| Type number | Package | Operating temp.(Cel) | # of Bits | Source Current per bit(mA) | I²C-bus(kHz) | Operating voltage(VDC) | Max Sink Current per bit(mA) | # of Addresses | Max Sink Current per package(mA) | Reset input pin |
|---|---|---|---|---|---|---|---|---|---|---|
| PCA9557BS | SOT629-1
(HVQFN16) | -40~85 | 8 | 10 | 400 | 2.3~5.5 | 25 | 8 | 100 | yes |
| PCA9557D | SOT109
| -40~85 | 8 | 10 | 400 | 2.3~5.5 | 25 | 8 | 100 | yes |
| PCA9557PW | SOT403-1
(TSSOP16) | -40~85 | 8 | 10 | 400 | 2.3~5.5 | 25 | 8 | 100 | yes |
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