The PCA8574/74A provide general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional I2C-bus (serial clock (SCL), serial data (SDA)).
The devices consist of an 8-bit quasi-bidirectional port and an I2C-bus interface. The PCA8574/74A have low current consumption and include latched outputs with 25 mA high current drive capability for directly driving LEDs.
The PCA8574/74A also possess an interrupt line (INT) that can be connected to the interrupt logic of the microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C-bus.
The internal Power-On Reset (POR) initializes the I/Os as inputs.
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| PCA8574AD | PCA8574AD,512 | 9352 834 89512 | Volume production | SOT162-1
(SO16) | Tube Dry Pack | Standard Marking | |
| PCA8574AD | PCA8574AD,518 | 9352 834 89518 | Volume production | SOT162-1
(SO16) | Reel Dry Pack, SMD, 13" | Standard Marking | |
| PCA8574AN | PCA8574AN,112 | 9352 834 92112 | Volume production | SOT38-4
(DIP16) | Tube | Standard Marking | |
| PCA8574APW | PCA8574APW,112 | 9352 837 59112 | Volume production | SOT403-1
(TSSOP16) | Tube | Standard Marking | |
| PCA8574APW | PCA8574APW,118 | 9352 837 59118 | Volume production | SOT403-1
(TSSOP16) | Reel Pack, SMD, 13" | Standard Marking | |
| PCA8574ATS | PCA8574ATS,112 | 9352 834 91112 | Volume production | SOT266-1
(SSOP20) | Tube | Standard Marking | |
| PCA8574ATS | PCA8574ATS,118 | 9352 834 91118 | Volume production | SOT266-1
(SSOP20) | Reel Pack, SMD, 13" | Standard Marking | |
| PCA8574D | PCA8574D,512 | 9352 834 85512 | Volume production | SOT162-1
(SO16) | Tube Dry Pack | Standard Marking | |
| PCA8574D | PCA8574D,518 | 9352 834 85518 | Volume production | SOT162-1
(SO16) | Reel Dry Pack, SMD, 13" | Standard Marking | |
| PCA8574N | PCA8574N,112 | 9352 834 86112 | Volume production | SOT38-4
(DIP16) | Tube | Standard Marking | |
| PCA8574PW | PCA8574PW,112 | 9352 837 61112 | Volume production | SOT403-1
(TSSOP16) | Tube | Standard Marking | |
| PCA8574PW | PCA8574PW,118 | 9352 837 61118 | Volume production | SOT403-1
(TSSOP16) | Reel Pack, SMD, 13" | Standard Marking | |
| PCA8574TS | PCA8574TS,112 | 9352 834 87112 | Volume production | SOT266-1
(SSOP20) | Tube | Standard Marking | |
| PCA8574TS | PCA8574TS,118 | 9352 834 87118 | Volume production | SOT266-1
(SSOP20) | Reel Pack, SMD, 13" | Standard Marking |
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL |
|---|---|---|---|---|---|---|---|---|
| PCA8574AD | PCA8574AD,512 | PCA8574AD |
| Always Pb-free | ||||
| PCA8574AD | PCA8574AD,518 | PCA8574AD |
| Always Pb-free | ||||
| PCA8574AN | PCA8574AN,112 | PCA8574AN |
| Always Pb-free | ||||
| PCA8574APW | PCA8574APW,112 | PCA8574APW |
| Always Pb-free | ||||
| PCA8574APW | PCA8574APW,118 | PCA8574APW |
| Always Pb-free | ||||
| PCA8574ATS | PCA8574ATS,112 | PCA8574ATS |
| Always Pb-free | ||||
| PCA8574ATS | PCA8574ATS,118 | PCA8574ATS |
| Always Pb-free | ||||
| PCA8574D | PCA8574D,512 | PCA8574D |
| Always Pb-free | ||||
| PCA8574D | PCA8574D,518 | PCA8574D |
| Always Pb-free | ||||
| PCA8574N | PCA8574N,112 | PCA8574N |
| Always Pb-free | ||||
| PCA8574PW | PCA8574PW,112 | PCA8574PW |
| Always Pb-free | ||||
| PCA8574PW | PCA8574PW,118 | PCA8574PW |
| Always Pb-free | ||||
| PCA8574TS | PCA8574TS,112 | PCA8574TS |
| Always Pb-free | ||||
| PCA8574TS | PCA8574TS,118 | PCA8574TS |
| Always Pb-free |
| Type number | Ordering code(12NC) | Orderable part number | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|---|
| PCA8574AD | 9352 834 89512 | PCA8574AD,512 | 1.0400 | NA | DIGI-KEY CORPORATION | 947 | 11/20/2009 | Buy online | not available | |
| PCA8574AD | 9352 834 89518 | PCA8574AD,518 | 1.0400 | NA | MOUSER ELECTRONICS | 177 | 11/20/2009 | Buy online | Order samples | |
| NA | MOUSER ELECTRONICS | 177 | 11/20/2009 | Buy online | ||||||
| NA | FUTURE ELECTRONICS | 1,000 | 11/19/2009 | Buy online | ||||||
| PCA8574AN | 9352 834 92112 | PCA8574AN,112 | 1.1100 | NA | MOUSER ELECTRONICS | 12 | 11/20/2009 | Buy online | Order samples | |
| NA | DIGI-KEY CORPORATION | 629 | 11/20/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 12 | 11/20/2009 | Buy online | ||||||
| PCA8574APW | 9352 837 59112 | PCA8574APW,112 | 1.0400 | NA | DIGI-KEY CORPORATION | 790 | 11/20/2009 | Buy online | not available | |
| PCA8574APW | 9352 837 59118 | PCA8574APW,118 | 1.0400 | NA | MOUSER ELECTRONICS | 113 | 11/20/2009 | Buy online | Order samples | |
| NA | MOUSER ELECTRONICS | 113 | 11/20/2009 | Buy online | ||||||
| NA | FUTURE ELECTRONICS | 100 | 11/19/2009 | Buy online | ||||||
| PCA8574ATS | 9352 834 91112 | PCA8574ATS,112 | 1.0400 | NA | DIGI-KEY CORPORATION | 744 | 11/20/2009 | Buy online | not available | |
| PCA8574ATS | 9352 834 91118 | PCA8574ATS,118 | 1.0400 | NA | FUTURE ELECTRONICS | 100 | 11/19/2009 | Buy online | not available | |
| PCA8574D | 9352 834 85512 | PCA8574D,512 | 1.0400 | NA | MOUSER ELECTRONICS | 61 | 11/20/2009 | Buy online | not available | |
| NA | DIGI-KEY CORPORATION | 1,118 | 11/20/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 61 | 11/20/2009 | Buy online | ||||||
| NA | FUTURE ELECTRONICS | 95 | 11/19/2009 | Buy online | ||||||
| PCA8574D | 9352 834 85518 | PCA8574D,518 | 1.0400 | not available | ||||||
| PCA8574N | 9352 834 86112 | PCA8574N,112 | 1.1100 | NA | MOUSER ELECTRONICS | 998 | 11/20/2009 | Buy online | Order samples | |
| NA | NEWARK | 393 | 11/20/2009 | Buy online | ||||||
| NA | DIGI-KEY CORPORATION | 747 | 11/20/2009 | Buy online | ||||||
| NA | MOUSER ELECTRONICS | 998 | 11/20/2009 | Buy online | ||||||
| PCA8574PW | 9352 837 61112 | PCA8574PW,112 | 1.0400 | NA | DIGI-KEY CORPORATION | 1,035 | 11/20/2009 | Buy online | not available | |
| PCA8574PW | 9352 837 61118 | PCA8574PW,118 | 1.0400 | NA | MOUSER ELECTRONICS | 49 | 11/20/2009 | Buy online | Order samples | |
| NA | MOUSER ELECTRONICS | 49 | 11/20/2009 | Buy online | ||||||
| PCA8574TS | 9352 834 87112 | PCA8574TS,112 | 1.0400 | NA | NEWARK | 1,276 | 11/20/2009 | Buy online | Order samples | |
| NA | DIGI-KEY CORPORATION | 1,031 | 11/20/2009 | Buy online | ||||||
| PCA8574TS | 9352 834 87118 | PCA8574TS,118 | 1.0400 | NA | NEWARK | 1,276 | 11/20/2009 | Buy online | not available | |
| NA | FUTURE ELECTRONICS | 100 | 11/19/2009 | Buy online |
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Application Notes
Support Documents