PCA9554AD
8-bit I2C-bus and SMBus I/O port with interrupt
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The PCA9554 and PCA9554A are 16-pin CMOS devices that provide 8 bits of General Purpose parallel Input/Output (GPIO) expansion for I²C-bus/SMBus applications and were developed to enhance the NXP Semiconductors family of I²C-bus I/O expanders. The improvements include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, 400 kHz clock frequency, and smaller packaging. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.
The PCA9554/PCA9554A consist of an 8-bit Configuration register (Input or Output selection); 8-bit Input Port register, 8-bit Output Port register and an 8-bit Polarity Inversion register (active HIGH or active LOW operation). The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input Port or Output Port register. The polarity of the read register can be inverted with the Polarity Inversion register. All registers can be read by the system master. Although pin-to-pin and I²C-bus address compatible with the PCF8574 series, software changes are required due to the enhancements and are discussed in Application Note AN469.
The PCA9554/PCA9554A open-drain interrupt output is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master that an input state has changed. The power-on reset sets the registers to their default values and initializes the device state machine.
Three hardware pins (A0, A1, A2) vary the fixed I²C-bus address and allow up to eight devices to share the same I²C-bus/SMBus. The PCA9554A is identical to the PCA9554 except that the fixed I²C-bus address is different allowing up to sixteen of these devices (eight of each) on the same I²C-bus/SMBus.
Features and benefits
- Operating power supply voltage range of 2.3 V to 5.5 V
- 5 V tolerant I/Os
- Polarity Inversion register
- Active LOW interrupt output
- Low standby current
- Noise filter on SCL/SDA inputs
- No glitch on power-up
- Internal power-on reset
- 8 I/O pins which default to 8 inputs
- 0 Hz to 400 kHz clock frequency
- 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 JEDEC Standard JESD78 which exceeds 100 mA
- Packages offered: DIP16, SO16, SSOP16, SSOP20, TSSOP16, HVQFN16 (2 versions: 4 x 4 x 0.85 mm and 3 x 3 x 0.85 mm), and bare die
- Series PCA9554/PCA9554A
8-bit I2C-bus and SMBus I/O port with interrupt
- Parametric search all I2C general purpose I/O
All information on this product information page is subject to the subsequent disclaimers:
Parametrics of this product
| Type number | Package | Max Sink Current per package(mA) | # 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| PCA9554AD | SOT162-1 (SO16) | 100 | 8 | yes | 10 | yes | 25 | 2.3~5.5 | 400 | -40~85 | 8 |
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Products / Packages
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking |
|---|---|---|---|---|---|---|
| PCA9554AD | PCA9554AD,112 | 9352 691 95112 | Volume production | SOT162-1 (SO16) | Tube | Standard Marking |
| PCA9554AD | PCA9554AD,118 | 9352 691 95118 | Volume production | SOT162-1 (SO16) | 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 |
|---|---|---|---|---|---|---|
| PCA9554AD/G | PCA9554AD/G,518 | 9352 764 22518 | Withdrawn Replacement product | SOT162-1 (SO16) | Reel Dry Pack, SMD, 13" | Standard Marking |
Discontinuation information
| Type number | Ordering code (12NC) | Last-time buy date | Last-time delivery date | Replacement product | DN Notice | Status | Comments |
|---|---|---|---|---|---|---|---|
| PCA9554AD/G | 935276422518 | 31-Dec-10 | 30-Jun-11 | PCA9554AD | DN 66 |
| Standard End of Life. Discontinued /G version only. |
Quality, reliability & chemical content
| Type number | Orderable part number | Chemical content | RoHS | Leadfree conversion date | RHF | IFR (FIT) | MTBF (hours) | MSL | MSL LF |
|---|---|---|---|---|---|---|---|---|---|
| PCA9554AD | PCA9554AD,112 | PCA9554AD |  | week 45, 2004 |  | 1 | 1 | ||
| PCA9554AD | PCA9554AD,118 | PCA9554AD | | week 45, 2004 | | 1 | 1 |
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 | Chemical content | RoHS | Leadfree conversion date | RHF | IFR (FIT) | MTBF (hours) | MSL | MSL LF |
|---|---|---|---|---|---|---|---|---|---|
| PCA9554AD/G | PCA9554AD/G,518 | Not available | | Always Pb-free | | 1 | 2 |
Discontinuation information
| Type number | Ordering code (12NC) | Last-time buy date | Last-time delivery date | Replacement product | DN Notice | Status | Comments |
|---|---|---|---|---|---|---|---|
| PCA9554AD/G | 935276422518 | 31-Dec-10 | 30-Jun-11 | PCA9554AD | DN 66 |
| Standard End of Life. Discontinued /G version only. |
Documentation for this product
Support links
- IBIS and HSPICE Model (standardics.nxp.com/support/tools/)
Ordering & availability
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