NCA9555-Q100
Low-voltage 16-bit I²C and SMBus I/O expander with interrupt output and configuration registers
The NCA9555-Q100 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-Q100 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-Q100 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-Q100 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.
This product has been qualified to the Automotive Electronics Council (AEC) standard Q100 (Grade 1) and is suitable for use in automotive applications.
Features and benefits
Automotive product qualification in accordance with AEC-Q100 (Grade 1)
Specified from -40 °C to +125 °C
I²C-bus to parallel port expander
Operating power supply voltage range of 1.65 V to 5.5 V
Low standby current consumption:
4.0 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
Parametrics
| Type number | VCC (V) | Logic switching levels | Power dissipation considerations | Tamb (°C) | Package name |
|---|---|---|---|---|---|
| NCA9555BY-Q100 | 1.65 - 5.5 | CMOS | low | -40~125 | HWQFN24 |
| NCA9555PW-Q100 | 1.65 - 5.5 | CMOS | low | -40~125 | TSSOP24 |
Package
| Type number | Orderable part number, (Ordering code (12NC)) | Status | Marking | Package | Package information | Reflow-/Wave soldering | Packing |
|---|---|---|---|---|---|---|---|
| NCA9555BY-Q100 | NCA9555BY-Q100HP (935691442128) |
Active | NCA9555 |
HWQFN24 (SOT8041-1) |
SOT8041-1 | SOT8041-1_128 | |
| NCA9555PW-Q100 | NCA9555PW-Q100J (935691448118) |
Active | NCA9555PW |
TSSOP24 (SOT355-1) |
SOT355-1 |
SSOP-TSSOP-VSO-WAVE
|
SOT355-1_118 |
Environmental information
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
|---|---|---|---|---|
| NCA9555BY-Q100 | NCA9555BY-Q100HP | NCA9555BY-Q100 |
|
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| NCA9555PW-Q100 | NCA9555PW-Q100J | NCA9555PW-Q100 |
|
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Documentation (12)
| File name | Title | Type | Date |
|---|---|---|---|
| NCA9555_Q100 | Low-voltage 16-bit I²C and SMBus I/O expander with interrupt output and configuration registers | Data sheet | 2024-08-05 |
| AN90063 | Questions about package outline drawings | Application note | 2025-06-13 |
| SOT355-1 | 3D model for products with SOT355-1 package | Design support | 2020-01-22 |
| nca9555 | NCA9555 IBIS model | IBIS model | 2023-01-09 |
| Nexperia_package_poster | Nexperia package poster | Leaflet | 2020-05-15 |
| 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 |
| SOT355-1 | plastic, thin shrink small outline package; 24 leads; 0.65 mm pitch; 7.8 mm x 4.4 mm x 1.2 mm body | Package information | 2024-11-15 |
| 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 |
| SSOP-TSSOP-VSO-WAVE | Footprint for wave soldering | Wave soldering | 2009-10-08 |
Support
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