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NXP Semiconductors PCA9553DP/02,118
- Part No.:
- PCA9553DP/02,118
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
PCA9553DP/02,118.pdf
- Description:
- IC LED DRVR LIN I2C 25MA 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,545
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Product details
Overview
The PCA9553DP/02 from NXP Semiconductors is a 4-bit I²C-bus LED blinker with two fully programmable internal blink rates (0.172 Hz to 44 Hz), 4 open-drain LED drivers (25 mA per output, 100 mA total), and GPIO capability for unused pins. It operates from 2.3 V to 5.5 V and integrates an internal oscillator-eliminating external timing components-making it ideal for embedded status indication in space-constrained industrial and consumer control panels.
For engineers reviewing the PCA9553DP/02 datasheet, PCA9553DP/02 pinout, PCA9553DP/02 application, or PCA9553DP/02 equivalent, this device delivers deterministic LED blinking with minimal I²C bus traffic, supports hot insertion, features noise-filtered SCL/SDA inputs, and provides precise duty-cycle control via PWM0/PWM1 registers for reliable visual feedback in resource-limited MCU systems.
Technical Context
The PCA9553DP/02 implements a dedicated I²C-controlled LED driver architecture with dual independent PWM generators (BLINK0 and BLINK1), each configured via separate prescaler (PSC0/PSC1) and pulse-width modulation (PWM0/PWM1) registers. Its internal oscillator eliminates external crystal or RC network dependencies while maintaining ±20% frequency stability across temperature and voltage.
All four LED outputs are open-drain with controlled edge rates to suppress ground bounce; unused outputs function as bidirectional GPIOs with high-impedance input mode and pull-up–dependent output logic. The device uses fixed I²C address 0xC6 (1100011b, R/W=0), distinct from PCA9553/01's 0xC4, enabling coexistence on the same bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Address | Fixed 7-bit address 0xC6 (1100011b); enables concurrent use with PCA9553/01 on same bus |
| Blink Rate Range | 0.172 Hz to 44 Hz (5.82 s to 23 ms period); programmable via PSC0/PSC1 registers with 256-step resolution |
| Duty Cycle Control | 0–100% adjustable per blink rate using PWM0/PWM1 (256-level resolution); 0x00 = always OFF, 0x80 = 50% |
| Output Sink Current | 25 mA per LED pin (LED0–LED3); 100 mA total package limit ensures safe parallel LED driving |
| Supply Voltage | 2.3 V to 5.5 V operation; supports mixed-voltage systems including 3.3 V and 5 V microcontroller interfaces |
| Standby Current | 1.9 µA typical at 5.5 V; enables ultra-low-power status indication in battery-backed applications |
| I/O Flexibility | Unused LED pins configurable as GPIO inputs (high-Z + INPUT register read) or outputs (pull-up required) |
Pinout & Package
TSSOP8 package (SOT505-1): plastic thin shrink small outline, 8-lead, 3 mm body width, lead pitch 0.65 mm, exposed thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LED0 (Pin 1) | Open-drain LED driver output / GPIO | Sinks up to 25 mA; configured via LS0 register for ON/OFF/BLINK0/BLINK1; high-Z when unused |
| VDD (Pin 2) | Positive supply rail | 2.3–5.5 V power input; decoupling capacitor recommended within 10 mm of pin |
| LED1 (Pin 3) | Open-drain LED driver output / GPIO | Functionally identical to LED0; independent blink/control assignment via LS0 bits 5:4 |
| SDA (Pin 4) | I²C serial data line | Open-drain bidirectional interface; requires external pull-up (≥1 kΩ) to VDD; noise-filtered input |
| LED2 (Pin 5) | Open-drain LED driver output / GPIO | Controlled by LS0 bits 3:2; shares same current and timing specs as LED0/LED1 |
| SCL (Pin 6) | I²C serial clock line | Input-only clock signal; noise-filtered; requires external pull-up; supports up to 400 kHz Fast-mode |
| VSS (Pin 7) | Ground reference | Must be connected directly to system ground plane; no internal connection to exposed pad (TSSOP8 has none) |
| LED3 (Pin 8) | Open-drain LED driver output / GPIO | Controlled by LS0 bits 1:0; full register-level independence for mixed blink patterns |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent blink engines | Simultaneous BLINK0 and BLINK1 operation enables two distinct LED patterns (e.g., heartbeat + alert) without MCU intervention |
| No external timing components | On-chip oscillator eliminates crystals, capacitors, or resistors-reducing BOM count and PCB area by ≥3 parts |
| I²C SMBus compatibility | Fully compliant with SMBus timeout, arbitration, and electrical specs; supports hot insertion and glitch-free power-up |
| Programmable edge rates | Controlled slew on LED outputs minimizes ground bounce and EMI in dense mixed-signal layouts |
| ESD robustness | 2000 V HBM, 150 V MM, 1000 V CDM protection ensures reliability during handling and board assembly |
Applications
| Industrial HMI Status Panel | Network Equipment Indicator |
|---|---|
Use Scenario: Front-panel LED indicators on PLC I/O modules showing RUN/ERROR/COMM status under variable ambient light. IC Role / Device Role / Timing Role: PCA9553DP/02 drives four discrete LEDs with independent blink profiles-RUN (steady), ERROR (2 Hz flash), COMM (0.5 Hz pulse)-using only one I²C write after initialization. Use Value: Reduces host MCU timer overhead and I²C bus load by >90% versus software-timed GPIO toggling; enables deterministic visual feedback even during heavy CPU load. |
Use Scenario: Rack-mounted Ethernet switches with per-port link/activity LEDs and system health indicators. IC Role / Device Role / Timing Role: PCA9553DP/02 manages 4 port-status LEDs (blinking at 4 Hz on activity) and 1 system LED (slow 0.2 Hz heartbeat), all synchronized to internal clocks. Use Value: Eliminates need for dedicated LED controller MCU or FPGA logic; supports hot-plug detection via I²C polling without interrupt latency. |
| Medical Device Power-On Sequence | Smart Home Hub UI Feedback |
Use Scenario: Diagnostic equipment boot sequence requiring timed LED progression (Power→Self-Test→Ready) with fail-safe timeout behavior. IC Role / Device Role / Timing Role: PCA9553DP/02 executes pre-programmed blink sequences via LS0 register writes; POR ensures all LEDs start OFF regardless of power ramp rate. Use Value: Guarantees consistent user-facing visual state during cold start; removes dependency on firmware execution timing for critical safety indications. |
Use Scenario: Voice assistant hub with multi-color status ring where individual segments indicate listening/speaking/error states. IC Role / Device Role / Timing Role: PCA9553DP/02 controls four monochrome LEDs (e.g., blue for listening, red for error) with precise 50% duty cycle blinks to avoid perceptual flicker. Use Value: Enables smooth, non-distracting UI feedback using hardware-timed outputs-no MCU PWM peripheral contention or jitter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9554DP/02 | 4-bit I²C GPIO expander (no blink engine); identical TSSOP8 package and I²C address 0xC6 | Requires host MCU to generate blink timing; suitable only when firmware control is preferred over autonomous operation | Select PCA9554DP/02 if GPIO expansion-not autonomous blinking-is the primary requirement; retains same layout and address compatibility |
| MAX6946ATL+ | 8-bit LED driver with 16-step blink rate control (vs. 256-step); higher 40 mA per output; 2.7–5.5 V supply | Supports more LEDs and higher current but lacks dual independent blink rates and uses different I²C address (0x40) | Choose MAX6946ATL+ when driving high-brightness LEDs or needing >4 outputs; requires PCB layout and firmware address changes |
Compared with PCA9554DP/02, the PCA9553DP/02 adds autonomous blink control without increasing pin count or footprint; versus MAX6946ATL+, it offers finer blink resolution and lower standby current but fewer outputs and lower drive strength-making it optimal for compact, low-power 4-LED status systems.
Availability
The PCA9553DP/02 is available at Aetrix Electronics and suitable for industrial HMI panels, network equipment indicators, medical device status displays, and smart home hub UIs requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for PCA9553DP/02 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 peripherals and low-power mixed-signal design.
The PCA9553DP/02 belongs to NXP's legacy I²C LED driver family, engineered specifically to offload LED timing tasks from resource-constrained microcontrollers in cost-sensitive, high-volume embedded systems.
FAQ
What is the I²C slave address of the PCA9553DP/02?
The PCA9553DP/02 uses a fixed 7-bit I²C address of 0xC6 (1100011b), where the R/W bit is appended during transmission. This differs from the PCA9553/01 (0xC4), allowing both variants to operate simultaneously on the same I²C bus without address conflict. The PCA9553DP/02 address is hardwired and not configurable via pins or registers.
How do I configure the PCA9553DP/02 to blink an LED at exactly 2 Hz with 50% duty cycle?
To achieve 2 Hz blinking on LED0 with 50% duty cycle using BLINK0, calculate PSC0 = (44 × period) − 1 = (44 × 0.5) − 1 = 21 (0x15), and set PWM0 = 256 − (duty × 256) = 256 − 128 = 128 (0x80). Write 0x15 to PSC0 (subaddress 0x01), 0x80 to PWM0 (subaddress 0x02), then set LS0 bits 1:0 to 0b10 (0x02) to assign LED0 to BLINK0. The PCA9553DP/02 will then autonomously toggle LED0 at 2 Hz.
Can unused LED pins on the PCA9553DP/02 be used as general-purpose inputs?
Yes-unused LED pins on the PCA9553DP/02 can function as digital inputs. Configure the target pin (e.g., LED2) to high-impedance mode (LS0 bits 3:2 = 0b01), then read its state from the INPUT register (address 0x00). External pull-up or pull-down resistors must be applied to establish a defined logic level when the pin is floating; the PCA9553DP/02 does not provide internal pull resistors.
Does the PCA9553DP/02 require external components for its internal oscillator to function?
No-the PCA9553DP/02 contains a fully integrated internal oscillator that requires no external capacitors, resistors, or crystals. This oscillator drives both BLINK0 and BLINK1 timing paths, enabling autonomous LED blinking immediately after power-on reset without any additional BOM components or layout area.
What is the maximum total sink current allowed for the PCA9553DP/02 package?
The PCA9553DP/02 has a maximum total sink current limit of 100 mA across all four LED outputs (LED0–LED3). While each pin supports up to 25 mA individually, simultaneous full-current operation on all outputs must not exceed 100 mA aggregate. Exceeding this violates the absolute maximum rating and may cause thermal shutdown or permanent damage to the PCA9553DP/02.
PCA9553DP/02,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 2.3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 25mA
- Frequency:
- 400kHz
- Dimming:
- I2C
- Applications:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
PCA9553DP/02,118 FAQ
1.How can I place an order for PCA9553DP/02,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9553DP/02,118 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 PCA9553DP/02,118 reliable?
The price and inventory of PCA9553DP/02,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9553DP/02,118 is usually 5 days.
3.What payment methods are accepted for PCA9553DP/02,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9553DP/02,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9553DP/02,118?
PCA9553DP/02,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9553DP/02,118 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 PCA9553DP/02,118?
For technical support, including PCA9553DP/02,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9553DP/02,118 requirements.
6.How does Aetrix verify that PCA9553DP/02,118 is sourced from the original manufacturer or authorized distributors?
All PCA9553DP/02,118 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 PCA9553DP/02,118 meets industry standards.
7.What is the process for return or replacement of PCA9553DP/02,118?
All PCA9553DP/02,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9553DP/02,118, 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 PCA9553DP/02,118 part is unused and in its original packaging.
Return procedure for PCA9553DP/02,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9553DP/02,118 Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
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LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
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