My Inquiry
My Account
NXP Semiconductors PCA9536TK,118
- Part No.:
- PCA9536TK,118
- Manufacturer:
- NXP Semiconductors
- Category:
- I/O Expanders
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
PCA9536TK,118.pdf
- Description:
- IC XPNDR 400KHZ I2C SMBUS 8HVSON
- Quantity:
- Payment:
- Shipping:
Inventory:125,778
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PCA9536TK,118 from NXP Semiconductors is a 4-bit I²C-bus/SMBus GPIO expander in HVSON8 package, providing configurable parallel input/output expansion for embedded control systems. It operates from 2.3 V to 5.5 V, supports up to 400 kHz clock frequency, features 100 kΩ internal pull-up resistors on all I/Os (defaulting to inputs), and includes polarity inversion and noise-filtered SCL/SDA inputs. It is used in ACPI power switches, LED/fan control, and sensor interface subsystems.
For engineers reviewing the PCA9536TK,118 datasheet, PCA9536TK,118 pinout, PCA9536TK,118 application, or PCA9536TK,118 equivalent, this page delivers verified electrical parameters, validated HVSON8 terminal mapping, confirmed register-level I/O configuration behavior, and real-world use cases in thermal management and peripheral control subsystems.
Technical Context
The PCA9536TK,118 implements a fixed-slave-address I²C interface (0x41) with no auto-increment capability, requiring explicit command-byte addressing for register access. Its internal architecture includes four dedicated 4-bit registers: Configuration (I/O direction), Input Port (read-only pin state), Output Port (writeable output latch), and Polarity Inversion (input data sign flip).
Power-on reset initializes all registers to default states: I/Os as high-impedance inputs with 100 kΩ pull-ups to VDD, polarity inversion bits cleared, and no output drive enabled. The device supports 5 V-tolerant I/Os while operating down to 2.3 V supply, enabling mixed-voltage system interfacing without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.3 V to 5.5 V - enables direct integration into 3.3 V and 5 V logic domains without external regulators. |
| I²C Clock Frequency | 0 Hz to 400 kHz - supports standard-mode and fast-mode I²C buses, compatible with SMBus timing requirements. |
| I/O Count & Type | 4 bidirectional CMOS I/Os - each configurable as input or output via Configuration register; defaults to input with 100 kΩ internal pull-up. |
| ESD Protection | 2000 V HBM, 200 V MM, 1000 V CDM - meets industrial handling requirements without additional protection circuitry. |
| Standby Current | 0.25 µA typical at VDD = 5.5 V, VI = VDD - enables ultra-low-power operation in battery-backed or always-on subsystems. |
| Output Drive Strength | ±10 mA per I/O (VOL = 0.7 V @ VDD = 3.0 V) - sufficient to directly drive LEDs, small relays, or logic inputs without external buffers. |
| Input Voltage Range | VSS −0.5 V to 5.5 V - allows safe interfacing with 5 V signals even when VDD = 2.3 V, eliminating need for external clamping diodes. |
Pinout & Package
HVSON8 package: plastic thermal-enhanced very thin small outline, no leads, 3 mm × 3 mm × 0.85 mm body, 8 terminals, exposed tie bar (4×) for thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IO0) | Configurable I/O port 0 | Bi-directional signal path; direction set by Configuration register bit C0; internal 100 kΩ pull-up active when configured as input. |
| 2 (IO1) | Configurable I/O port 1 | Same functionality as IO0; independent control via Configuration register bit C1; supports polarity inversion via register bit N1. |
| 3 (IO2) | Configurable I/O port 2 | Same functionality as IO0; controlled by Configuration register bit C2 and Polarity Inversion register bit N2. |
| 4 (VSS) | Ground reference | Primary return path for all internal circuitry and I/O current; must be connected to system ground plane with low-inductance routing. |
| 5 (IO3) | Configurable I/O port 3 | Same functionality as IO0; controlled by Configuration register bit C3 and Polarity Inversion register bit N3. |
| 6 (SCL) | I²C serial clock input | Open-drain compatible; requires external pull-up; noise-filtered to suppress spikes ≤50 ns; defines I²C bus timing. |
| 7 (SDA) | I²C serial data bidirectional line | Open-drain compatible; requires external pull-up; noise-filtered; carries address, command, and data during read/write transactions. |
| 8 (VDD) | Positive supply voltage | Power source for internal logic and I/O drivers; range 2.3 V–5.5 V; decoupling capacitor (100 nF) required near terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Polarity Inversion Register | Per-pin inversion of Input Port register data - enables software-defined active-HIGH/active-LOW interpretation without hardware changes. |
| No-Glitch Power-Up | Internal POR holds outputs in high-impedance state until VDD ≥ 1.7 V - prevents spurious I/O transitions during power ramp. |
| 5 V-Tolerant I/Os | All I/O pins accept up to 5.5 V regardless of VDD setting - eliminates level-shifting components in mixed-voltage designs. |
| Low Standby Current | Sub-µA quiescent draw in standby mode - critical for energy-constrained applications like IoT edge nodes and portable devices. |
| Integrated Noise Filtering | SCL/SDA inputs reject transients <50 ns - improves robustness in electrically noisy environments (e.g., motor drives, power supplies). |
Applications
| Thermal Management Subsystem | LED Status Indicator Control |
|---|---|
|
Use Scenario: Monitoring temperature sensor alerts and controlling cooling fan speed in industrial PLCs. IC Role / Device Role / Timing Role: GPIO expander interfaces between microcontroller I²C bus and discrete thermal sensors/fans; provides isolated, software-configurable I/Os. Use Value: Reduces MCU GPIO resource pressure while enabling flexible fan enable/disable and fault signaling via IO0–IO3 without PCB redesign. |
Use Scenario: Driving multi-color status LEDs on network switch front panels. IC Role / Device Role / Timing Role: I²C-controlled output driver for RGB LED anodes/cathodes; uses Output Port register to set LED states synchronously. Use Value: Enables centralized LED control over I²C with minimal firmware overhead; polarity inversion allows common-anode or common-cathode LED wiring. |
| ACPI Power Switch Interface | Push-Button & Sensor Hub |
|
Use Scenario: Implementing OS-directed power sequencing in embedded PCs using ACPI-compliant wake/sleep signals. IC Role / Device Role / Timing Role: Configured as input to detect power button press; outputs drive PMIC enable lines under OS control via I²C. Use Value: Provides standardized ACPI-compatible signaling with debounced inputs and glitch-free outputs, meeting Intel Platform Environment Control Interface (PECI) auxiliary requirements. |
Use Scenario: Aggregating multiple mechanical push buttons and digital sensors (e.g., door open/close, motion detection) in smart building controllers. IC Role / Device Role / Timing Role: Input capture node for asynchronous user events; Input Port register reads debounced button states; interrupts generated via host polling. Use Value: Consolidates 4 discrete input sources onto one I²C address, reducing MCU pin count and simplifying BOM with integrated pull-ups and ESD protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar GPIO expander applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCA6408A | 8-bit I/O, same 2.3–5.5 V range, but lacks polarity inversion register and has higher standby current (1 µA typical). | Supports double the I/O count; suitable where expansion headroom is needed, but less optimal for strict 4-bit, low-quiescent-current use cases. | Select TCA6408A only if 8 I/Os are required and polarity inversion is not critical; PCA9536TK,118 remains preferred for minimal footprint and lowest standby power. |
| PCA9554A | 8-bit I/O, identical register map and feature set, but larger SO8/TSSOP8 packages; no HVSON8 option available. | Same functional compatibility including polarity inversion and noise filtering, but requires more PCB area and offers no thermal advantage. | Choose PCA9554A only if HVSON8 assembly is unavailable; PCA9536TK,118 delivers identical functionality in space- and thermally optimized package. |
Compared with TCA6408A and PCA9554A, the PCA9536TK,118 uniquely combines 4-bit precision, sub-µA standby current, HVSON8 thermal performance, and full register compatibility - making it optimal for compact, low-power, thermally constrained I²C GPIO expansion.
Availability
PCA9536TK,118 is available at Aetrix Electronics and suitable for thermal management subsystems, LED status indicator control, ACPI power switch interfaces, and push-button/sensor hub applications requiring stable component supply across industrial and embedded product lifecycles.
Supply support for PCA9536TK,118 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in I²C ecosystem components and embedded control interfaces.
The PCA9536TK,118 belongs to NXP's I²C-bus I/O expander product line, designed specifically to extend microcontroller GPIO resources in space-constrained, low-power embedded systems while maintaining SMBus compliance and robust ESD immunity.
FAQ
What is the I²C slave address of the PCA9536TK,118?
The PCA9536TK,118 has a fixed 7-bit I²C slave address of 0x41 (1000001b), with the R/W bit appended during transmission. This address is hardwired and non-configurable, allowing only one PCA9536TK,118 per I²C bus segment without address translation hardware.
Does the PCA9536TK,118 require external pull-up resistors on SCL and SDA lines?
Yes, the PCA9536TK,118 requires external pull-up resistors on both SCL and SDA lines to ensure proper I²C bus operation. While its I/O pins include internal 100 kΩ pull-ups, these apply only to the IO0–IO3 ports - not the I²C bus lines - which must be pulled to VDD via external resistors (typically 2.2 kΩ to 10 kΩ depending on bus capacitance and speed).
Can the PCA9536TK,118 drive LEDs directly?
Yes, the PCA9536TK,118 can drive LEDs directly: each I/O pin supports ±10 mA output current (at VOL = 0.7 V, VDD = 3.0 V), sufficient for standard indicator LEDs. When configured as output, the PCA9536TK,118 latches state in the Output Port register, enabling stable LED on/off control via I²C writes without continuous polling.
How does the polarity inversion register affect input readings in the PCA9536TK,118?
The polarity inversion register in the PCA9536TK,118 flips the logical sense of corresponding bits in the Input Port register: writing '1' to bit N0 inverts IO0's read value (e.g., physical LOW becomes register HIGH). This allows software to interpret active-LOW signals as active-HIGH without changing external circuitry - a key feature for flexible sensor or switch interface design.
What is the maximum ambient temperature rating for the PCA9536TK,118?
The PCA9536TK,118 is rated for operation from −40 °C to +85 °C ambient temperature (Tamb). Its HVSON8 package provides enhanced thermal dissipation versus SO8 or TSSOP8 variants, supporting reliable performance in thermally dense layouts where junction temperature must remain below +125 °C under full load.
PCA9536TK,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Number of I/O:
- 4
- Interface:
- I2C, SMBus
- Interrupt Output:
- No
- Features:
- POR
- Output Type:
- Push-Pull
- Current - Output Source/Sink:
- 10mA, 25mA
- Clock Frequency:
- 400 kHz
- Voltage - Supply:
- 2.3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSON (3x3)
PCA9536TK,118 FAQ
1.How can I place an order for PCA9536TK,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9536TK,118 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PCA9536TK,118 reliable?
The price and inventory of PCA9536TK,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9536TK,118 is usually 5 days.
3.What payment methods are accepted for PCA9536TK,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9536TK,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9536TK,118?
PCA9536TK,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9536TK,118 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PCA9536TK,118?
For technical support, including PCA9536TK,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9536TK,118 requirements.
6.How does Aetrix verify that PCA9536TK,118 is sourced from the original manufacturer or authorized distributors?
All PCA9536TK,118 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PCA9536TK,118 meets industry standards.
7.What is the process for return or replacement of PCA9536TK,118?
All PCA9536TK,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9536TK,118, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PCA9536TK,118 part is unused and in its original packaging.
Return procedure for PCA9536TK,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9536TK,118 Tags
-
TCA6408ARSVR
Texas Instruments
-
TCA9535RTWR
Texas Instruments
-
FXL6408UMX
onsemi
-
PCF8574ADWR
Texas Instruments
-
PCF8574APWR
Texas Instruments
-
TCA9555PWR
Texas Instruments
-
TCA9554PWR
Texas Instruments
-
TCA9554APWR
Texas Instruments
-
TCA9539PWR
Texas Instruments
-
TCA9534PWR
Texas Instruments
-
TCA9555RTWR
Texas Instruments
-
TCA9535PWR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
