Orderable parts
| Type number | Orderable part number | Ordering code (12NC) | Package | Buy from distributors |
|---|---|---|---|---|
| NCA9548ABY | NCA9548ABYHP | 935691789128 | SOT8041-1 | Order product |
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Click here for more informationNCA9548ABY
8-channel I²C-bus switch with reset
The NCA9548A is an octal bidirectional translating switch controlled via the I²C-bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register.
An active LOW reset input allows the NCA9548A to recover from a situation where one of the downstream I²C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets the I²C-bus state machine and causes all the channels to be deselected as does the internal Power-on reset function.
The pass gates of the switches are constructed such that the VCC pin can be used to limit the maximum high voltage which will be passed by the NCA9548A. This allows the use of different bus voltages on each pair, so that 1.8 V or 2.5 V or 3.3 V parts can communicate with 5 V parts without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 6 V tolerant.
Features and benefits
1-of-8 bidirectional translating switches
I²C-bus interface logic; compatible with SMBus standards
Active LOW reset input
Three address pins allowing up to eight devices on the I²C-bus
Channel selection via I²C-bus, in any combination
Power-up with all switch channels deselected
Low Ron switches
Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses
No glitch on power-up
Supports hot insertion
Low standby current
Operating power supply voltage range of 1.65 V to 5.5 V
6 V tolerant inputs
0 Hz to 400 kHz clock frequency
Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
Two packages offered: TSSOP24, and HWQFN24
ESD protection:
HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2 kV
CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1 kV
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
Parametrics
| Type number | VCC(A) (V) | Logic switching levels | Power dissipation considerations | Tamb (°C) | Package name |
|---|---|---|---|---|---|
| NCA9548ABY | 1.65 - 5.5 | CMOS | low | -40~125 | HWQFN24 |
Package
| Type number | Orderable part number, (Ordering code (12NC)) | Status | Marking | Package | Package information | Reflow-/Wave soldering | Packing |
|---|---|---|---|---|---|---|---|
| NCA9548ABY | NCA9548ABYHP (935691789128) |
Samples available / Development | CA9548 |
HWQFN24 (SOT8041-1) |
SOT8041-1 | SOT8041-1_128 |
Environmental information
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
|---|---|---|---|---|
| NCA9548ABY | NCA9548ABYHP | NCA9548ABY |
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Documentation (6)
| File name | Title | Type | Date |
|---|---|---|---|
| NCA9548A | 8-channel I²C-bus switch with reset | Data sheet | 2025-08-26 |
| AN90063 | Questions about package outline drawings | Application note | 2025-09-15 |
| NCA9548A_NCA9547A_quickguide | Qucik reference guide for products NCA9548A and NCA9547A | Other type | 2025-09-04 |
| 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 |
| UM90073 | NEVB-NCA9548A (NCA9547A and NCA9548A) evaluation board | User manual | 2025-09-04 |
Support
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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
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Ordering, pricing & availability
| Type number | Orderable part number | Ordering code (12NC) | Status | Packing | Packing Quantity | Buy online |
|---|
Sample
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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.