Orderable parts
| Type number | Orderable part number | Ordering code (12NC) | Package | Buy from distributors |
|---|---|---|---|---|
| NCA9555BY | NCA9555BYHP | 935691298128 | SOT8041-1 | Order product |
| NCA9555BY | NCA9555BY/C5HP | 935692169128 | SOT8041-1 | Order product |
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Click here for more informationNCA9555BY
Low-voltage 16-bit I²C and SMBus I/O expander with interrupt output and configuration registers
The NCA9555 provides 16 bits of General Purpose Input/Output (GPIO) expansion for I²C-bus/SMBus applications. It is designed for a wide voltage range of 1.65 V to 5.5 V with interrupt and default pull-up resistors on GPIOs. Nexperia GPIO expanders provide an elegant solution when additional IOs are needed while keeping the interconnections to a minimum, for example, in ACPI power switches, sensors, push buttons, LEDs and fan control. The NCA9555 contains a set of 8 bit input, output, configuration and polarity inversion registers. At power up all IOs default to inputs. Each IO can be configured as either input or output by changing the corresponding bit in the configuration register. The data for each input or output is stored in the corresponding input or output register. The polarity inversion register can be programmed to invert the polarity of the input register. The NCA9555 has an open-drain interrupt output which is activated when any one of the GPIO changes from its corresponding input port register state. The power on reset sets the registers to default values and initializes the device state machine. The NCA9555 has three address pins A0, A1 and A2 which can be used to configure the I²C bus slave address of the device. It allows up-to eight devices to share the same I²C-bus/SMBus.
Features and benefits
I²C-bus to parallel port expander
Operating power supply voltage range of 1.65 V to 5.5 V
Low standby current consumption:
2.5 µA (maximum)
Schmitt-trigger action allows slow input transition and better switching noise immunity at the SCL and SDA inputs
Vhys = 0.10 × VCC (typical)
Noise filter on SCL and SDA inputs
5 V tolerant I/Os
16 I/O pins which power up configured in input state with weak pull-up resistor
Open-drain active LOW interrupt output (INT)
400 kHz Fast-mode I²C-bus
Internal power-on reset
No glitch on power-up
Latched outputs with 25 mA drive maximum capability for directly driving LEDs
Latch-up performance exceeds 100 mA per JESD78, Class II
ESD protection:
HBM ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
CDM ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
Specified from -40 °C to +85 °C
Parametrics
| Type number | VCC (V) | Logic switching levels | Power dissipation considerations | Tamb (°C) | Package name |
|---|---|---|---|---|---|
| NCA9555BY | 1.65 - 5.5 | CMOS | low | -40~85 | HWQFN24 |
Package
| Type number | Orderable part number, (Ordering code (12NC)) | Status | Marking | Package | Package information | Reflow-/Wave soldering | Packing |
|---|---|---|---|---|---|---|---|
| NCA9555BY | NCA9555BYHP (935691298128) |
Active | NCA9555 |
HWQFN24 (SOT8041-1) |
SOT8041-1 | SOT8041-1_128 | |
| NCA9555BY/C5HP (935692169128) |
Active | NCA9555 | SOT8041-1_128 |
Boards
| Part number | Description | Type | Quick links | Shop link |
|---|---|---|---|---|
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Description NEVB – NCA9555, the NCA95xx evaluation board, is an Arduino™ compatible shield form factor PCB designed for the Nexperia I²C controlled GPIO expander family. The board provides convenient test points for GND, I²C-Bus signals SCL and SDA as well as an interrupt open drain output. The EVB can be used for the GPIO expander derivatives NCA9555, NCA9535, NCA9539 and NCA9595.
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Type Evaluation board
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Quick links
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Shop link
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Environmental information
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
|---|---|---|---|---|
| NCA9555BY | NCA9555BYHP | NCA9555BY |
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| NCA9555BY | NCA9555BY/C5HP | NCA9555BY |
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Documentation (12)
| File name | Title | Type | Date |
|---|---|---|---|
| NCA9555 | Low-voltage 16-bit I²C and SMBus I/O expander with interrupt output and configuration registers | Data sheet | 2024-08-05 |
| AN90044 | A study of I2C with examples | Application note | 2023-07-03 |
| nca9555 | NCA9555 IBIS model | IBIS model | 2023-01-09 |
| Nexperia_document_leaflet_I2C_GPIO_expanders | I2C GPIO Expanders 2023 | Leaflet | 2023-04-26 |
| SOT8041-1 | plastic thermal enhanced very very thin Quad Flat packages, no leads;24 terminals; 0.5 mm pitch; 4 x 4 x 0.75 mm body | Package information | 2024-04-23 |
| SOT8041-1_128 | QFN4x4 24L; Reel pack for SMD, 13"; Q2/T3 product orientation | Packing information | 2022-08-01 |
| SOT8041-1_128 | QFN4x4 24L; Reel pack for SMD, 13"; Q2/T3 product orientation | Packing information | 2022-08-01 |
| NCA9555BY_Nexperia_Product_Reliability | NCA9555BY Nexperia Product Reliability | Quality document | 2023-05-29 |
| NCA95XX_Arduino_Sketches | NCA95XX Arduino™ Sketch Examples | Software | 2023-03-12 |
| NCA95XX_EVB_Software | NCA95XX EVB GUI | Software | 2023-03-12 |
| UM90016 | NCA95xx GPIO expander EVB (Arduino™ shield compatible) | User manual | 2024-02-23 |
| UM90017 | NCA95XX Evaluation Board: Quick-Start Guide | User manual | 2023-01-18 |
Support
If you are in need of design/technical support, let us know and fill in the answer form we'll get back to you shortly.
Models
| File name | Title | Type | Date |
|---|---|---|---|
| nca9555 | NCA9555 IBIS model | IBIS model | 2023-01-09 |
Ordering, pricing & availability
| Type number | Orderable part number | Ordering code (12NC) | Status | Packing | Packing Quantity | Buy online |
|---|---|---|---|---|---|---|
| NCA9555BY | NCA9555BYHP | 935691298128 | Active | SOT8041-1_128 | 3,000 | Order product |
| NCA9555BY | NCA9555BY/C5HP | 935692169128 | Active | SOT8041-1_128 | 3,000 | Order product |
Sample
As a Nexperia customer you can order samples via our sales organization.
If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples. Check out the list of official distributors.
How does it work?
The interactive datasheets are based on the Nexperia MOSFET precision electrothermal models. With our interactive datasheets you can simply specify your own conditions interactively. Start by changing the values of the conditions. You can do this by using the sliders in the condition fields. By dragging the sliders you will see how the MOSFET will perform at the new conditions set.
NCA9555BY
Low-voltage 16-bit I²C and SMBus I/O expander with interrupt output and configuration registers
Buy from Nexperia
| SKU | Stock* | MOQ | Price per unit | Quantity |
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Buy from distributors
| Seller | SKU | Stock | MOQ | 1 | 10 | 100 | 1,000 | 10,000 | Purchase |
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| Seller | SKU | Stock | MOQ | 1 | 10 | 100 | 1,000 | 10,000 | Purchase |
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| Seller | SKU | Stock | MOQ | 1 | 10 | 100 | 1,000 | 10,000 | Purchase |
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| Seller | SKU | Stock | MOQ | 1 | 10 | 100 | 1,000 | 10,000 | Purchase |
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| Seller | SKU | Stock | MOQ | 1 | 10 | 100 | 1,000 | 10,000 | Purchase |
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* Stock values are subject to change
** Displayed price per unit is based on small quantity orders
*** Authorized resellers for overstock, mature, and discontinued products which are warranted for reliability by the reseller, no longer by Nexperia>
** Displayed price per unit is based on small quantity orders
*** Authorized resellers for overstock, mature, and discontinued products which are warranted for reliability by the reseller, no longer by Nexperia>
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