Orderable parts
| Type number | Orderable part number | Ordering code (12NC) | Package | Buy from distributors |
|---|---|---|---|---|
| NCA9536AGX | NCA9536AGXX | 935692371115 | SOT1233-2 | Order product |
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Click here for more informationNCA9536AGX
4-bit I²C and SMBus low-power I/O expander with configurable registers and interrupt
The NCA9536 is a 4-bit bidirectional I/O expander compliant with I²C and SMBus protocols, operating over a wide supply range of 1.65 V to 5.5 V. It enables remote GPIO expansion for microcontroller-based systems via a standard two-wire interface (SCL/SDA), supporting clock frequencies up to 1 MHz (Fast-Mode Plus).
Part of Nexperia’s advanced I²C-bus expander portfolio, the device is optimized for space-constrained applications requiring additional I/O such as LED control, button interfacing, sensor integration, status indication, and signal routing. Its compact form factor and low-power operation make it well-suited for consumer, industrial, and IoT designs.
The NCA9536 provides 4 bits in Configuration Register defining each I/O as input or output, 4 bits in Input Port Register capturing the logic state of input pins, 4 bits in Output Port Register controlling the output logic levels and 4 bits in Polarity Inversion Register allowing inversion of input logic (active HIGH or LOW). In addition, 2 bits in special function register are provided to disable the internal pull-up resistors and to configure P3 as an interrupt (INT) output.
The system controller configures the I/Os via the Configuration Register, accesses real-time data through the Input Port Register, and controls the outputs through the Output Port Registers. The Polarity Inversion Register allows flexible logic interpretation. All registers are accessible via the I²C interface.
The NCA9536 supports I²C General Call address (0x00), which upon receiving a specific reset command (0x06), to initiate a software-triggered reset. This is ideal for systems lacking hardware reset or requiring simultaneous reset of multiple devices. Additionally , Pin P3 can be configured as an interrupt output (INT), enabling efficient real-time input monitoring for applications like button interfaces or sensor events. Upon power-on reset, all registers are initialized to default states, and the internal state machine is set. The device features a fixed I²C-bus address, supporting single-device operation per bus.
Features
4-bit I²C-bus GPIO
Operating power supply voltage range of 1.65 V to 5.5 V
5 V tolerant I/Os
Polarity Inversion register
Software reset by General Call
P3 reconfigurable as Interrupt output
Low standby current
Noise filter on SCL/SDA inputs
No glitch on power-up
Internal power-on reset
4 I/O pins which default to 4 inputs with 100 kΩ internal pull-up resistor
0 Hz to 1 MHz clock frequency Fast-mode Plus I²C-bus
ESD protection:
HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
Latch-up performance exceeds 100 mA per JESD 78B Class II
Packages offered: SOT1233-2 (X2SON8), TSSOP8 (SOT505-3)
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
Parametrics
| Type number | VCC (V) | Logic switching levels | Power dissipation considerations | Tamb (°C) | Package name |
|---|---|---|---|---|---|
| NCA9536AGX | 1.65 - 5.5 | CMOS | low | -40~85 | X2SON8 |
Package
| Type number | Orderable part number, (Ordering code (12NC)) | Status | Marking | Package | Package information | Reflow-/Wave soldering | Packing |
|---|---|---|---|---|---|---|---|
| NCA9536AGX | NCA9536AGXX (935692371115) |
Samples available / Development | z6 |
X2SON8 (SOT1233-2) |
SOT1233-2 | SOT1233-2_115 |
Environmental information
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
|---|---|---|---|---|
| NCA9536AGX | NCA9536AGXX | NCA9536AGX |
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Documentation (6)
| File name | Title | Type | Date |
|---|---|---|---|
| NCA9536 | 4-bit I²C and SMBus low-power I/O expander with configurable registers and interrupt | Data sheet | 2026-03-04 |
| AN90063 | Questions about package outline drawings | Application note | 2025-10-22 |
| SOT1233-2 | 3D model for products with SOT1233-2 package | Design support | 2021-01-28 |
| REFLOW_BG-BD-1 | Reflow soldering profile | Other type | 2026-02-10 |
| SOT1233-2 | plastic thermal enhanced extremely thin small outline package; no leads;8 terminals; body 1.35 x 0.8 x 0.32 mm | Package information | 2022-04-21 |
| SOT1233-2_115 | X2SON8; Reel pack for SMD, 7''; Q1/T1 product orientation | Packing information | 2020-05-12 |
Support
Please contact us if you have any questions. If you are in need of design support, please fill in the technical support form, we will get back to you shortly.
Please visit our engineer exchange forum or contact us for further support.
Longevity
The Nexperia Longevity Program is aimed to provide our customers information from time to time about the expected time that our products can be ordered. The NLP is reviewed and updated regularly by our Executive Management Team. View our longevity program here.
Models
| File name | Title | Type | Date |
|---|---|---|---|
| SOT1233-2 | 3D model for products with SOT1233-2 package | Design support | 2021-01-28 |
Ordering, pricing & availability
| Type number | Orderable part number | Ordering code (12NC) | Status | Packing | Packing Quantity | Buy online |
|---|
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.