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NXP Semiconductors PCA9553D/01,118
- Part No.:
- PCA9553D/01,118
- Manufacturer:
- NXP Semiconductors
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PCA9553D/01,118.pdf
- Description:
- IC LED DRVR LINEAR I2C 25MA 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,845
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Product details
Overview
PCA9553D/01 from NXP Semiconductors is a 4-bit I²C-bus LED blinker IC with two fully programmable internal blink rates (0.172–44 Hz), 4 open-drain LED drivers (25 mA per output, 100 mA package max), 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-enabling autonomous LED blinking in embedded control panels and status indicator systems.
For engineers reviewing the PCA9553D/01 datasheet, PCA9553D/01 pinout, PCA9553D/01 application, or PCA9553D/01 equivalent, key selection criteria include its fixed I²C address (0xC4), SO8 package compatibility, dual PWM blink rate configuration, and ability to offload MCU timer resources in space-constrained industrial HMI designs.
Technical Context
The PCA9553D/01 implements a dedicated I²C slave architecture with auto-increment register addressing and a hardware-controlled oscillator driving two independent PWM generators (BLINK0/BLINK1). Its register map includes PSC0/PWM0 and PSC1/PWM1 for precise period/duty cycle control, plus an LED selector (LS0) that assigns each of four outputs to static ON/OFF or either blink mode.
It features noise-filtered SCL/SDA inputs, controlled edge rates to suppress ground bounce, and Power-On Reset (POR) initializing all registers to default states (LEDs OFF). The device supports standard- and fast-mode I²C (up to 400 kHz) and SMBus-compatible logic levels, with ESD protection exceeding 2000 V HBM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Address | Fixed 7-bit address 0xC4 (1100010b); enables coexistence with PCA9553D/02 (0xC6) on same bus |
| Blink Rate Range | 0.172 Hz to 44 Hz (5.82 s to 23 ms period); programmable via PSC0/PSC1 prescalers and PWM0/PWM1 duty registers |
| Output Drive | 4 open-drain outputs; 25 mA sink per pin, 100 mA total package limit; supports direct LED drive with external pull-up |
| Supply Voltage | 2.3 V to 5.5 V; ensures interoperability across 3.3 V and 5 V systems without level shifting |
| Standby Current | 1.9 µA typical at 5.5 V; enables ultra-low-power operation in battery-backed status indicators |
| Operating Temp | −40 °C to +85 °C; qualified for industrial-grade embedded applications including control cabinets and test equipment |
| I²C Speed | Supports up to 400 kHz fast-mode; reduces command latency during dynamic LED pattern updates |
Pinout & Package
PCA9553D/01 is supplied in SO8 package (SOT96-1), 3.9 mm body width, 8-lead plastic small outline format. Pin 1 is LED0; pin 4 is VSS (ground); pin 8 is VDD (supply).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LED0) | Open-drain LED driver output / GPIO | Sinks current when active; high-impedance when configured as input; defaults HIGH (LED OFF) after POR |
| 2 (LED1) | Open-drain LED driver output / GPIO | Independent control path; supports blink rate selection via LS0 register bits 3:2 |
| 3 (LED2) | Open-drain LED driver output / GPIO | Configurable as static or PWM-driven output; shares same sink capability and thermal limits as LED0–LED3 |
| 4 (VSS) | Supply ground reference | Mandatory connection to system ground; required for proper POR and internal logic reference |
| 5 (LED3) | Open-drain LED driver output / GPIO | Final LED channel; selectable between BLINK0/BLINK1 or static states using LS0 bits 7:6 |
| 6 (SCL) | I²C serial clock input | Noise-filtered; accepts standard/fast-mode clocks up to 400 kHz; requires external pull-up resistor |
| 7 (SDA) | I²C serial data bidirectional line | Open-drain structure; compatible with SMBus arbitration; requires external pull-up resistor |
| 8 (VDD) | Positive supply voltage | 2.3–5.5 V range; powers internal oscillator, logic, and output drivers; decoupling capacitor recommended |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent blink engines | Enables simultaneous distinct LED patterns (e.g., heartbeat + activity indicator) without MCU intervention |
| No external timing components | Internal oscillator eliminates need for crystals, RC networks, or external clocks-reducing BOM count and board area |
| GPIO reuse of LED pins | Unused LED outputs function as configurable digital I/Os-extending system I/O count without adding ICs |
| Hardware Power-On Reset | Guarantees known initial state (all LEDs OFF) at power-up; prevents unintended illumination during boot |
| SMBus-compatible interface | Ensures interoperability with host controllers implementing SMBus Alert, Timeout, or Packet Error Checking protocols |
Applications
| Industrial Control Panel Status Indicators | Network Equipment Link/Activity LEDs |
|---|---|
Use Scenario: Visual status feedback for PLC I/O modules, relay banks, and safety interlock states in factory automation cabinets. IC Role / Device Role / Timing Role: Autonomous blink controller managing 4 independent status LEDs (RUN, ERR, COMM, IO) with distinct flash patterns. Use Value: Offloads MCU timer resources and reduces I²C bus traffic by >90% compared to software-timed GPIO toggling. |
Use Scenario: Front-panel link/activity indication on Ethernet switches, media converters, and PoE injectors. IC Role / Device Role / Timing Role: Dedicated LED driver providing standardized 1 Hz link blink and 4 Hz activity pulse synchronized to PHY events. Use Value: Eliminates need for discrete transistors and RC timers; supports hot-plug detection via I²C address uniqueness (/01 vs /02). |
| Medical Device Power-On Self-Test Indicators | Consumer Appliance User Interface Feedback |
Use Scenario: Multi-stage POST sequence indication during startup of infusion pumps, diagnostic monitors, and portable ultrasound units. IC Role / Device Role / Timing Role: Sequenced LED activation (e.g., green→yellow→green) driven by pre-programmed blink registers during firmware initialization. Use Value: Provides deterministic, fail-safe visual confirmation without relying on potentially unstable early-boot MCU code. |
Use Scenario: Button press feedback, mode selection indicators, and standby/power-on animation in smart home hubs and kitchen appliances. IC Role / Device Role / Timing Role: Low-power LED controller enabling smooth 0.5 Hz breathing effect and instant response to user input via I²C write. Use Value: Achieves <3 µA standby current while maintaining full blink functionality-extending battery life in cordless devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED blinker applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9554D/01 | 4-bit I²C GPIO expander only-no internal oscillator or blink registers; requires MCU to toggle outputs | Lacks autonomous blink capability; suitable only where MCU has spare timer and bandwidth for LED management | Select only if existing firmware already handles LED timing and additional GPIO is needed beyond blink functionality |
| TLC59108IPWR | 8-channel constant-current LED driver with single programmable blink rate (not dual); higher precision current regulation (±3%) | Designed for RGB backlighting and uniform brightness; lacks GPIO reuse and uses different register mapping | Prefer when precise current matching across multiple LEDs is critical, and dual-rate flexibility is not required |
Compared with PCA9554D/01, PCA9553D/01 reduces I²C transaction count by eliminating repeated ON/OFF commands; versus TLC59108IPWR, it offers independent dual-rate control ideal for multi-state status signaling but trades off current accuracy for lower cost and simpler configuration.
Availability
PCA9553D/01 is available at Aetrix Electronics and suitable for industrial control panels, network equipment status indicators, and medical device self-test interfaces requiring stable component supply and long-term manufacturability.
Supply support for PCA9553D/01 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in I²C peripherals and low-power mixed-signal design.
The PCA9553 product line delivers autonomous LED control for resource-constrained embedded systems-designed to reduce MCU overhead and simplify status indication in space- and power-sensitive applications.
FAQ
What is the I²C slave address of PCA9553D/01?
The PCA9553D/01 has a fixed 7-bit I²C slave address of 0xC4 (1100010b). This differs from the PCA9553D/02, which uses 0xC6-allowing both variants to operate simultaneously on the same I²C bus without address conflict. The PCA9553D/01 datasheet confirms this address in Figure 5 and Table 4's control register definition.
Can unused LED outputs on PCA9553D/01 be used as general-purpose I/Os?
Yes, unused LED outputs on PCA9553D/01 can function as GPIOs. When configured as inputs, set the corresponding LEDn bit in the LS0 register to high-impedance (01) and read the state via the INPUT register. As outputs, connect an external pull-up resistor and program the LS0 register to drive LOW or HIGH-impedance states-enabling flexible I/O expansion without adding discrete buffers.
What are the maximum blink frequency and duty cycle resolution supported by PCA9553D/01?
The PCA9553D/01 supports blink frequencies from 0.172 Hz to 44 Hz (periods 5.82 s to 23 ms), with duty cycle resolution of 1/256 steps (0% to 100% in ~0.39% increments) via the 8-bit PWM0/PWM1 registers. These values are derived directly from the formulas: Blink Period = (PSCx + 1)/44 and Duty Cycle = (256 − PWMx)/256, as specified in Sections 7.3.2–7.3.5 of the PCA9553D/01 datasheet.
Does PCA9553D/01 require external components for its internal oscillator?
No, the PCA9553D/01 does not require any external components for its internal oscillator. The oscillator is fully integrated and factory-trimmed, enabling autonomous blink operation immediately after power-up and I²C configuration-eliminating crystals, capacitors, or resistors traditionally needed for timing circuits. This is explicitly stated in the "Features" section and confirmed in the block diagram (Figure 1).
How does Power-On Reset (POR) affect PCA9553D/01 output states?
Upon power application, PCA9553D/01's internal POR circuit holds the device in reset until VDD reaches VPOR (1.7–2.2 V), then initializes all registers to default values-including the LS0 register setting all LED outputs to high-impedance (LED OFF). This guarantees predictable, safe startup behavior with no unintended LED illumination, as documented in Section 7.5 and Table 10 of the PCA9553D/01 datasheet.
PCA9553D/01,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-SO
PCA9553D/01,118 FAQ
1.How can I place an order for PCA9553D/01,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9553D/01,118 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 PCA9553D/01,118 reliable?
The price and inventory of PCA9553D/01,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9553D/01,118 is usually 5 days.
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Once your PCA9553D/01,118 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 PCA9553D/01,118?
For technical support, including PCA9553D/01,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9553D/01,118 requirements.
6.How does Aetrix verify that PCA9553D/01,118 is sourced from the original manufacturer or authorized distributors?
All PCA9553D/01,118 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 PCA9553D/01,118 meets industry standards.
7.What is the process for return or replacement of PCA9553D/01,118?
All PCA9553D/01,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9553D/01,118, 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 PCA9553D/01,118 part is unused and in its original packaging.
Return procedure for PCA9553D/01,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCA9553D/01,118 Tags
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