
PCF8574
Remote 8-bit I/O expander for I2C-bus
The PCF8574 is a silicon CMOS circuit. It provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I2C-bus).
The device consists of an 8-bit quasi-bidirectional port and an I2C-bus interface. The PCF8574 has a low current consumption and includes latched outputs with high current drive capability for directly driving LEDs. It also possesses an interrupt line (INT) which 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. This means that the PCF8574 can remain a simple slave device.
The PCF8574 and PCF8574A versions differ only in their slave address as shown in Fig.10.
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| PCF8574AP | PCF8574AP,112 | 9338 516 70112 | Volume production | SOT38-4 (DIP16) | Bulk Pack | Standard Marking | |
| PCF8574AT/3 | PCF8574AT/3,512 | 9352 755 81512 | Volume production | SOT162-1 (SO16) | Tube Dry Pack | Standard Marking | |
| PCF8574AT/3 | PCF8574AT/3,518 | 9352 755 81518 | Volume production | SOT162-1 (SO16) | Reel Dry Pack, SMD, 13" | Standard Marking | |
| PCF8574ATS/3 | PCF8574ATS/3,118 | 9352 765 44118 | Volume production | SOT266-1 (SSOP20) | Reel Pack, SMD, 13" | Standard Marking | |
| PCF8574P | PCF8574P,112 | 9337 060 60112 | Volume production | SOT38-4 (DIP16) | Bulk Pack | Standard Marking | |
| PCF8574T/3 | PCF8574T/3,512 | 9352 756 17512 | Volume production | SOT162-1 (SO16) | Tube Dry Pack | Standard Marking | |
| PCF8574T/3 | PCF8574T/3,518 | 9352 756 17518 | Volume production | SOT162-1 (SO16) | Reel Dry Pack, SMD, 13" | Standard Marking | |
| PCF8574TS/3 | PCF8574TS/3,112 | 9352 756 72112 | Volume production | SOT266-1 (SSOP20) | Tube | Standard Marking | |
| PCF8574TS/3 | PCF8574TS/3,118 | 9352 756 72118 | Volume production | SOT266-1 (SSOP20) | Reel Pack, SMD, 13" | Standard Marking |
The variants in the table below are discontinued. See the table Discontinuation information at the bottom of this page for more information.
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| PCF8574AT | PCF8574AT,112 | 9338 516 60112 | Withdrawn Replacement product | SOT162-1 (SO16) | Bulk Pack | Standard Marking | |
| PCF8574AT | PCF8574AT,118 | 9338 516 60118 | Withdrawn Replacement product | SOT162-1 (SO16) | Reel Pack, SMD, 13" | Standard Marking | |
| PCF8574ATS/F3 | PCF8574ATS/F3,118 | 9352 717 53118 | Withdrawn Replacement product | SOT266-1 (SSOP20) | Reel Pack, SMD, 13" | Standard Marking | |
| PCF8574T | PCF8574T,112 | 9337 280 80112 | Withdrawn Replacement product | SOT162-1 (SO16) | Bulk Pack | Standard Marking | |
| PCF8574T | PCF8574T,118 | 9337 280 80118 | Withdrawn Replacement product | SOT162-1 (SO16) | Reel Pack, SMD, 13" | Standard Marking | |
| PCF8574TS/F3 | - | 9350 847 90512 | Withdrawn Replacement product | SOT266-1 (SSOP20) | Tube Dry Pack | Standard Marking | |
| PCF8574TS/F3 | PCF8574TS/F3,118 | 9350 847 90118 | Withdrawn Replacement product | SOT266-1 (SSOP20) | Reel Pack, SMD, 13" | Standard Marking | |
| PCF8574TS/F3 | PCF8574TS/F3,112 | 9350 847 90112 | Withdrawn Replacement product | SOT266-1 (SSOP20) | Tube | Standard Marking |
| Type number | Ordering code (12NC) | Last-time buy date | Last-time delivery date | Replacement product | DN Notice | Status | Comments |
|---|---|---|---|---|---|---|---|
| PCF8574AT | 933851660112 | 30-Mar-05 | 30-jun-05 | PCF8574AT/3 | DN 53 |
| Standard End of Life. See Replacement Part. |
| PCF8574AT | 933851660118 | 30-Mar-05 | 30-jun-05 | PCF8574AT/3 | DN 53 |
| Standard End of Life. See Replacement Part. |
| PCF8574ATS/F3 | 935271753118 | 31-dec-08 | 30-jun-09 | PCF8574ATS/3 | DN 61 |
| Limited Availability. |
| PCF8574T | 933728080112 | 30-Mar-05 | 30-jun-05 | PCF8574T/3 | DN 53 |
| Limited Supply. See Replacement |
| PCF8574T | 933728080118 | 30-Mar-05 | 30-jun-05 | PCF8574T/3 | DN 53 |
| Limited Supply. See Replacement |
| PCF8574TS/F3 | 935084790512 | 31-03-00 | 30-06-00 | available in non dry package | DN 41 |
| 6TG408415 |
| PCF8574TS/F3 | 935084790118 | 30-Mar-05 | 30-jun-05 | PCF8574TS/3 | DN 53 |
| Limited Supply. See Replacement. Consult Marketing. |
| PCF8574TS/F3 | 935084790112 | 30-Mar-05 | 30-jun-05 | PCF8574TS/3 | DN 53 |
| Limited Supply. See Replacement. Consult Marketing. |
| Type number | Package | # of Bits | INTERRUPT | Source Current per bit(mA) | Weak Pull-Up Current Source | Max Sink Current per bit(mA) | Operating voltage(VDC) | I²C-bus(kHz) | Operating temp.(Cel) | # of Addresses | Max Sink Current per package(mA) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| PCF8574AP | SOT38-4 (DIP16) | 8 | yes | 0.1 | yes | 20 | 2.5~6.0 | 100 | -40~85 | 8 | 100 |
| PCF8574AT | SOT162-1 (SO16) | 8 | yes | 0.1 | yes | 20 | 2.5~6.0 | 100 | -40~85 | 8 | 100 |
| PCF8574ATS/3 | SOT266-1 (SSOP20) | 8 | yes | 0.1 | yes | 20 | 2.5~6.0 | 100 | -40~85 | 8 | 100 |
| PCF8574P | SOT38-4 (DIP16) | 8 | yes | 0.1 | yes | 20 | 2.5~6.0 | 100 | -40~85 | 8 | 100 |
| PCF8574T | SOT162-1 (SO16) | 8 | yes | 0.1 | yes | 20 | 2.5~6.0 | 100 | -40~85 | 8 | 100 |
| PCF8574TS/3 | SOT266-1 (SSOP20) | 8 | yes | 0.1 | yes | 20 | 2.5~6.0 | 100 | -40~85 | 8 | 100 |
| Type number | Orderable part number | Chemical content | RoHS | Leadfree conversion date | RHF | IFR (FIT) | MTBF (hours) | MSL | MSL LF |
|---|---|---|---|---|---|---|---|---|---|
| PCF8574AP | PCF8574AP,112 | PCF8574AP | Always Pb-free | ||||||
| PCF8574AT/3 | PCF8574AT/3,512 | PCF8574AT/3 | week 35, 2004 | e1 | 2 | ||||
| PCF8574AT/3 | PCF8574AT/3,518 | PCF8574AT/3 | week 35, 2004 | e1 | 2 | ||||
| PCF8574ATS/3 | PCF8574ATS/3,118 | PCF8574ATS/3 | Always Pb-free | ||||||
| PCF8574P | PCF8574P,112 | PCF8574P | Always Pb-free | ||||||
| PCF8574T/3 | PCF8574T/3,512 | PCF8574T/3 | Always Pb-free | ||||||
| PCF8574T/3 | PCF8574T/3,518 | PCF8574T/3 | Always Pb-free | ||||||
| PCF8574TS/3 | PCF8574TS/3,112 | PCF8574TS/3 | Always Pb-free | ||||||
| PCF8574TS/3 | PCF8574TS/3,118 | PCF8574TS/3 | Always Pb-free |
The variants in the table below are discontinued. See the table Discontinuation information at the bottom of this page for more information.
Quality and reliability disclaimer| Type number | Ordering code (12NC) | Last-time buy date | Last-time delivery date | Replacement product | DN Notice | Status | Comments |
|---|---|---|---|---|---|---|---|
| PCF8574AT | 933851660112 | 30-Mar-05 | 30-jun-05 | PCF8574AT/3 | DN 53 |
| Standard End of Life. See Replacement Part. |
| PCF8574AT | 933851660118 | 30-Mar-05 | 30-jun-05 | PCF8574AT/3 | DN 53 |
| Standard End of Life. See Replacement Part. |
| PCF8574ATS/F3 | 935271753118 | 31-dec-08 | 30-jun-09 | PCF8574ATS/3 | DN 61 |
| Limited Availability. |
| PCF8574T | 933728080112 | 30-Mar-05 | 30-jun-05 | PCF8574T/3 | DN 53 |
| Limited Supply. See Replacement |
| PCF8574T | 933728080118 | 30-Mar-05 | 30-jun-05 | PCF8574T/3 | DN 53 |
| Limited Supply. See Replacement |
| PCF8574TS/F3 | 935084790512 | 31-03-00 | 30-06-00 | available in non dry package | DN 41 |
| 6TG408415 |
| PCF8574TS/F3 | 935084790118 | 30-Mar-05 | 30-jun-05 | PCF8574TS/3 | DN 53 |
| Limited Supply. See Replacement. Consult Marketing. |
| PCF8574TS/F3 | 935084790112 | 30-Mar-05 | 30-jun-05 | PCF8574TS/3 | DN 53 |
| Limited Supply. See Replacement. Consult Marketing. |
Sample orders normally take 2-4 days for delivery.
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