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Product InformationFeatures
DESCRIPTION/ORDERING INFORMATIONThis 8-bit input/output (I/O) expander for the two-line bidirectional bus (I2C) is designed for 2.5-V to 6-V VCC operation. The PCF8574A provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)]. The device features an 8-bit quasi-bidirectional I/O port (P0-P7), including latched outputs with high-current drive capability for directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power on, the I/Os are high. In this mode, only a current source to VCC is active. An additional strong pullup to VCC allows fast rising edges into heavily loaded outputs. This device turns on when an output is written high and is switched off by the negative edge of SCL. The I/Os should be high before being used as inputs. The PCF8574A provides an open-drain output (INT) that can be connected to the interrupt input of a microcontroller. An interrupt is generated by any rising or falling edge of the port inputs in the input mode. After time, tiv, INT is valid. Resetting and reactivating the interrupt circuit is achieved when data on the port is changed to the original setting or data is read from, or written to, the port that generated the interrupt. Resetting occurs in the read mode at the acknowledge bit after the rising edge of the SCL signal, or in the write mode at the acknowledge bit after the high-to-low transition of the SCL signal. Interrupts that occur during the acknowledge clock pulse can be lost (or be very short) due to the resetting of the interrupt during this pulse. Each change of the I/Os after resetting is detected and, after the next rising clock edge, is transmitted as INT. Reading from, or writing to, another device does not affect the interrupt circuit. 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. Therefore, the PCF8574A can remain a simple slave device. |
| Price | Packaging | CAD Design Tools | Samples | ||||||
| Device | Status | Temp (oC) | Price | Quantity | Package | Pins | Top Side Marking | Package QTY | Package Carrier | Symbols | Footprints | Samples |
| PCF8574ADGVR | ACTIVE | -40 to 85 | 1.12 | 1ku | TVSOP (DGV) | 20 | 2000 | LARGE T&R | ||||
| PCF8574ADGVRE4 | ACTIVE | -40 to 85 | 1.12 | 1ku | TVSOP (DGV) | 20 | 2000 | LARGE T&R | ||||
| PCF8574ADGVRG4 | ACTIVE | -40 to 85 | 1.12 | 1ku | TVSOP (DGV) | 20 | 2000 | LARGE T&R | ||||
| PCF8574ADW | ACTIVE | -40 to 85 | 1.12 | 1ku | SOIC (DW) | 16 | View | 40 | TUBE | Purchase Samples | ||
| PCF8574ADWE4 | ACTIVE | -40 to 85 | 1.12 | 1ku | SOIC (DW) | 16 | View | 40 | TUBE | Purchase Samples | ||
| PCF8574ADWG4 | ACTIVE | -40 to 85 | 1.12 | 1ku | SOIC (DW) | 16 | View | 40 | TUBE | Purchase Samples | ||
| PCF8574ADWR | ACTIVE | -40 to 85 | 1.12 | 1ku | SOIC (DW) | 16 | View | 2000 | LARGE T&R | |||
| PCF8574ADWRE4 | ACTIVE | -40 to 85 | 1.12 | 1ku | SOIC (DW) | 16 | View | 2000 | LARGE T&R | |||
| PCF8574ADWRG4 | ACTIVE | -40 to 85 | 1.12 | 1ku | SOIC (DW) | 16 | View | 2000 | LARGE T&R | |||
| PCF8574AN | ACTIVE | -40 to 85 | 1.12 | 1ku | PDIP (N) | 16 | View | 25 | TUBE | |||
| PCF8574ANE4 | ACTIVE | -40 to 85 | 1.12 | 1ku | PDIP (N) | 16 | View | 25 | TUBE | |||
| PCF8574APW | ACTIVE | -40 to 85 | 1.12 | 1ku | TSSOP (PW) | 20 | View | 70 | TUBE | Purchase Samples | ||
| PCF8574APWE4 | ACTIVE | -40 to 85 | 1.12 | 1ku | TSSOP (PW) | 20 | View | 70 | TUBE | Purchase Samples | ||
| PCF8574APWG4 | ACTIVE | -40 to 85 | 1.12 | 1ku | TSSOP (PW) | 20 | View | 70 | TUBE | Purchase Samples | ||
| PCF8574APWR | ACTIVE | -40 to 85 | 1.12 | 1ku | TSSOP (PW) | 20 | View | 2000 | LARGE T&R | |||
| PCF8574APWRE4 | ACTIVE | -40 to 85 | 1.12 | 1ku | TSSOP (PW) | 20 | View | 2000 | LARGE T&R | |||
| PCF8574APWRG4 | ACTIVE | -40 to 85 | 1.12 | 1ku | TSSOP (PW) | 20 | View | 2000 | LARGE T&R | |||
| PCF8574ARGYR | ACTIVE | -40 to 85 | 1.12 | 1ku | QFN (RGY) | 20 | 1000 | LARGE T&R | ||||
| PCF8574ARGYRG4 | ACTIVE | -40 to 85 | 1.12 | 1ku | QFN (RGY) | 20 | 1000 | LARGE T&R | ||||
* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.
| TI Inventory Status | Reported Distributor Inventory | |||||||
| PCF8574ADGVR | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| >10k* | >10k | 12 Nov | 9 Weeks | Americas | DigiKey | >1k | |||
| Mouser Electronics | >1k | |||||||
| Rochester Electronics | >1k | |||||||
| Asia | WPI | >1k | ||||||
| PCF8574ADGVRE4 | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| >10k* | >10k | 12 Nov | 9 Weeks | None Reported View Distributors | |||||
| PCF8574ADGVRG4 | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| >10k* | >10k | 12 Nov | 9 Weeks | None Reported View Distributors | |||||
| PCF8574ADW | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | 520 | 27 Oct | 6 Weeks | Americas | Arrow | 451 | |||
| >10k | 10 Nov | Mouser Electronics | 768 | ||||||
| Newark | 292 | |||||||
| Rochester Electronics | >1k | |||||||
| Asia | WPI | 279 | ||||||
| Europe | Abacus Polar | 400 | ||||||
| Arrow Southern Europe | 40 | |||||||
| Avnet-SILICA | >1k | |||||||
| Spoerle | 200 | |||||||
| PCF8574ADWE4 | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | 520 | 27 Oct | 6 Weeks | None Reported View Distributors | |||||
| >10k | 10 Nov | ||||||||
| PCF8574ADWG4 | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | 520 | 27 Oct | 6 Weeks | Americas | Avnet | 400 | |||
| >10k | 10 Nov | Europe | EBV Elektronik | 80 | |||||
| PCF8574ADWR | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | 2000 | 29 Oct | 4 Weeks | Americas | Arrow | >1k | |||
| >10k | 10 Nov | Avnet | >1k | ||||||
| DigiKey | >1k | |||||||
| Mouser Electronics | >1k | |||||||
| Rochester Electronics | >1k | |||||||
| Asia | WPI | >1k | ||||||
| Wintech | >1k | |||||||
| PCF8574ADWRE4 | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | 2000 | 29 Oct | 4 Weeks | None Reported View Distributors | |||||
| >10k | 10 Nov | ||||||||
| PCF8574ADWRG4 | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | 2000 | 29 Oct | 4 Weeks | Americas | Avnet | >1k | |||
| >10k | 10 Nov | ||||||||
| PCF8574AN | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | 275 | 27 Oct | 7 Weeks | Americas | Arrow | 370 | |||
| 3843 | 18 Nov | Avnet | 30 | ||||||
| >10k | 25 Nov | DigiKey | >1k | ||||||
| Mouser Electronics | 143 | |||||||
| Newark | 136 | |||||||
| Rochester Electronics | >1k | |||||||
| Asia | WPI | 72 | ||||||
| Europe | Avnet-SILICA | >1k | ||||||
| EBV Elektronik | 13 | |||||||
| Spoerle | 25 | |||||||
| PCF8574ANE4 | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | 275 | 27 Oct | 7 Weeks | Americas | Mouser Electronics | 358 | |||
| 3843 | 18 Nov | ||||||||
| >10k | 25 Nov | ||||||||
| PCF8574APW | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | >10k | 13 Nov | 9 Weeks | Americas | Mouser Electronics | 489 | |||
| Europe | Avnet-SILICA | 495 | ||||||
| Spoerle | 350 | |||||||
| PCF8574APWE4 | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | >10k | 13 Nov | 9 Weeks | None Reported View Distributors | |||||
| PCF8574APWG4 | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | >10k | 13 Nov | 9 Weeks | None Reported View Distributors | |||||
| PCF8574APWR | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | >10k | 27 Oct | 4 Weeks | Americas | DigiKey | >1k | |||
| Mouser Electronics | 232 | |||||||
| Rochester Electronics | >1k | |||||||
| Asia | WPI | >1k | ||||||
| Europe | Avnet-SILICA | >1k | ||||||
| PCF8574APWRE4 | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | >10k | 27 Oct | 4 Weeks | None Reported View Distributors | |||||
| PCF8574APWRG4 | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | >10k | 27 Oct | 4 Weeks | Americas | Avnet | >1k | |||
| PCF8574ARGYR | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| >10k* | >10k | 29 Dec | 7 Weeks | Americas | Avnet | 1k | |||
| DigiKey | >1k | |||||||
| Mouser Electronics | 600 | |||||||
| Rochester Electronics | >1k | |||||||
| Asia | WPI | >1k | ||||||
| PCF8574ARGYRG4 | As of 8:57 AM GMT, 12 Oct 2008 | As of 8:57 AM GMT, 12 Oct 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| >10k* | >10k | 29 Dec | 7 Weeks | None Reported View Distributors | |||||
* Our information is updated daily, so please check back with us soon if this does not meet your needs. You may also contact your TI Authorized Distributor , including those listed above, for real time stock information.
** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.
| Product Content | DPPM / MTBF / FIT Rate | ||||
| Device | Eco Plan* | Lead / Ball Finish | MSL Rating / Peak Reflow | Details | Details |
| PCF8574ADGVR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| PCF8574ADGVRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| PCF8574ADGVRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| PCF8574ADW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | |