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PCA9556
Datasheet
General description
The PCA9556 is a silicon CMOS circuit which provides parallel input/output expansion for SMBus applications. The PCA9556 consists of an 8-bit input port register, 8-bit output port register, and an SMBus interface. It has low current consumption and a high impedance open drain output pin, I/O0.
The SMBus system master can reset the PCA9556 in the event of a timeout by asserting a LOW on the reset input. The SMBus system master can also invert the PCA9556 inputs by writing to the active HIGH polarity inversion bits. Finally, the system master can enable the PCA9556?s I/Os as either inputs or outputs by writing to the configuration register.
The power-on reset puts the registers in their default state and initializes the SMBus state machine. The RESET pin causes the same reset/initialization to occur without depowering the part.
The PCA9557 8-bit I²C SMBus I/O port with reset is the higher performance pin-for-pin replacement for the PCA9556.
Features
- SMBus compliance with fixed 3.3V voltage levels
- Operating power supply voltage range of 3.0 V 0 5.5 V
- Active high polarity inverter register
- Each I/O is configurable as an input or output
- Active low reset pin
- Low leakage current on power-down
- Noise filter on SCL/SDA inputs
- No glitch on power-up
- Internal power-on reset
- 8 I/O pins which default to 8 inputs
- High impedance open drain on I/O0
- ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101 - Latch-up testing is done to JESDEC Standard JESD78 which exceeds 100 mA
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| PCA9556PW | PCA9556PW | 9352 628 99112 | Volume production | SOT403-1
(TSSOP16) | Tube | Standard Marking | PCA9556PW
| week 48, 2004 |
| PCA9556PW | PCA9556PW-T | 9352 628 99118 | Volume production | SOT403-1
(TSSOP16) | Reel Pack, SMD, 13" | Standard Marking | PCA9556PW
| week 48, 2004 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online |
|---|---|---|---|---|---|---|---|
| PCA9556PW | 9352 628 99112 | 1.4100 | NA | ARROW ELECTRONICS | 1,578 | 10/8/2008 | Buy online |
| NA | AVNET ELECTRONICS MARKETING | 4,610 | 10/8/2008 | Buy online | |||
| NA | DIGI-KEY CORPORATION | 1,749 | 10/9/2008 | Buy online | |||
| NA | MOUSER ELECTRONICS | 96 | 10/9/2008 | Buy online | |||
| PCA9556PW | 9352 628 99118 | 1.4100 | ASIA | WPI | 2,500 | 10/09/2008 | Buy online |
| NA | FUTURE ELECTRONICS- NORTH AMER | 3,000 | 10/8/2008 | Buy online |
Applications
Related applications
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Set-top box - MMS functionality
Technical documents
Application Notes
Support Documents
75011212;
I2C 2002-1A Evaluation Board Kit (01-Mar-03)
75012744;
I2C Bus Solutions 2004 (2004-02-01)
39340011_21;
I2C-bus specification (version 2.1) (2000-01-01)
UM10204_3;
I2C-bus specification and user manual (26-Jun-07)
Parametrics/similar products
| Type number | Package | Operating temp.(Cel) | # of Bits | Source Current per bit(mA) | Max. output current (A p-p) | I²C-bus(kHz) | Operating voltage(VDC) | Max Sink Current per bit(mA) | # of Addresses | Reset input pin |
|---|---|---|---|---|---|---|---|---|---|---|
| PCA9556PW | SOT403-1
(TSSOP16) | -40~85 | 8 | 10 | 80 | 100 | 3.0~5.5 | 20 | 8 | yes |
Similar products
PCA9556 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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