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Texas Instruments TCA6507PWG4
- Part No.:
- TCA6507PWG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TCA6507PWG4.pdf
- Description:
- IC LED DRVR LIN I2C 40MA 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,345
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Product details
Overview
TCA6507PWG4 from Texas Instruments is a low-voltage 7-bit I²C/SMBus LED driver IC with integrated intensity control, fade/blink timing logic, and shutdown capability. It features seven open-drain outputs (P0–P6), supports 1.65 V to 3.6 V supply, delivers up to 40 mA per output, and operates with 5.5-V tolerant outputs - enabling direct LED drive in mobile UI backlighting and status indicator systems.
For engineers reviewing the TCA6507PWG4 datasheet, TCA6507PWG4 pinout, TCA6507PWG4 application, or TCA6507PWG4 equivalent, this page provides verified functional architecture, banked PWM control details, real-world thermal and timing specs, and validated alternative options for LED dimming subsystems requiring minimal MCU intervention.
Technical Context
The TCA6507PWG4 implements two independent PWM modules (PWM0 and PWM1) driving two configurable LED banks (BANK0: P0–P3; BANK1: P4–P6), each with programmable blink/fade rates and 16-step intensity control. Its internal oscillator runs at 28–58 kHz, generating ~125 Hz output modulation with ~8 ms period for smooth perceived transitions.
It uses an I²C interface compliant with Standard and Fast Mode (up to 400 kHz), supports hot insertion, and includes EN-driven hardware reset with 60 µs minimum pulse width. All outputs default to high-impedance at power-on, and the device enters full register reset + oscillator disable upon EN low assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.65 V to 3.6 V - compatible with modern low-voltage MCUs and SoCs; enables direct interface without level shifters |
| Output Drive | 40 mA max per open-drain port (P0–P6) - sufficient for driving standard LEDs without external drivers |
| I²C Speed | Up to 400 kHz Fast Mode - supports responsive configuration updates and dynamic brightness changes |
| Intensity Steps | 16 discrete brightness levels (0–15) - enables fine-grained visual differentiation in status indicators |
| Standby Current | 3 µA typical at 1.96–3.6 V - critical for battery-powered devices needing ultra-low quiescent power during idle |
| Oscillator Freq | 28–58 kHz - determines base timing resolution for fade-on/fade-off and blink intervals |
| ESD Rating | ±2000 V HBM - ensures robustness in handheld and portable assembly environments |
Pinout & Package
TCA6507PWG4 is packaged in a 14-pin TSSOP (PW package), 5.00 mm × 4.40 mm body size, with exposed pad not electrically connected. Pin numbering follows JEDEC MS-012, top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Supplies I²C logic, oscillator, and control circuitry; must be decoupled locally; provides voltage-level translation for SDA/SCL |
| GND | Ground reference | Common return path for all internal circuits and output sink current; requires low-impedance PCB connection |
| SCL | I²C clock input | Master-generated clock signal; requires pull-up resistor to VCC; supports up to 400 kHz with ≤400 pF bus load |
| SDA | I²C bidirectional data line | Open-drain, requires pull-up resistor to VCC; handles address, command, and data transfer; 5.5-V tolerant |
| EN | Enable/shutdown control | Active-high enable; low state forces full register reset, disables oscillator, and places outputs in high-Z; min 60 µs pulse required |
| P0–P6 | LED/general-purpose outputs | Seven open-drain outputs; each configurable as ON/OFF/blink/fade; 5.5-V tolerant; max 40 mA sink per pin |
Key Features
| Feature | Design Value |
|---|---|
| Two independent LED banks | BANK0 (P0–P3) and BANK1 (P4–P6) support separate blink/fade timing and intensity profiles - enables dual-zone UI lighting (e.g., power + alert) |
| Programmable fade transitions | Fade-ON and Fade-OFF rates independently set per bank - eliminates harsh LED switching for human-centric interfaces |
| Master ambient light detection (ALD) | Single 4-bit ALD value overrides individual bank intensities - allows system-wide brightness scaling based on ambient sensor input |
| General-purpose output mode | Unused P-port pins function as standard open-drain GPIO - adds flexibility for non-LED signaling (e.g., reset pulses, enable flags) |
| No power-up glitch | Outputs remain high-impedance until configuration completes - prevents unintended LED activation during boot |
Applications
| Mobile Phone Status Indicators | Laptop Keyboard Backlight Zones |
|---|---|
Use Scenario: Driving multi-color notification LEDs (e.g., charging, message, missed call) with smooth fade effects and low MCU overhead. IC Role / Device Role / Timing Role: Dedicated LED dimmer offloading PWM generation from application processor; manages banked outputs with independent timing registers. Use Value: Reduces CPU utilization by >90% vs. software-timed GPIO toggling; enables consistent 125 Hz flicker-free dimming across all indicators. |
Use Scenario: Controlling segmented keyboard backlight zones (left/right) with distinct brightness and fade behavior based on user activity. IC Role / Device Role / Timing Role: Dual-bank LED driver executing independent fade-ON/OFF sequences per zone via I²C commands; synchronized to system sleep/wake events. Use Value: Enables perceptually smooth transitions between illumination states without firmware polling; supports 16-step intensity matching ambient light sensor output. |
| Industrial HMI Panel LEDs | USB-C Docking Station Status Lights |
Use Scenario: Providing fault/status indication (e.g., overtemp, comms loss) using high-reliability, ESD-hardened LED outputs in harsh environments. IC Role / Device Role / Timing Role: Robust open-drain driver with ±2000 V HBM rating; configured for steady ON/OFF or slow blink modes via persistent I²C register writes. Use Value: Eliminates need for discrete protection components; 5.5-V tolerant outputs interface directly with 3.3 V or 5 V LED strings. |
Use Scenario: Managing multi-function status LEDs (power, USB data, video, battery) on compact docking stations with strict power and space constraints. IC Role / Device Role / Timing Role: Low-quiescent-current (3 µA standby) LED controller enabling always-on visual feedback without draining host system battery. Use Value: Achieves <5 µA total system standby current contribution when EN is asserted; supports hot-plug detection via I²C address polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCA6507PWR | Same die, 14-pin TSSOP tape-and-reel packaging; identical electrical specs and pinout | No functional difference; optimized for automated SMT assembly vs. tube-packaged PWG4 | Select TCA6507PWR for high-volume production; TCA6507PWG4 suits prototyping and low-quantity builds |
| PCA9634DGGR | 8-channel I²C LED driver with 256-step PWM, higher resolution but no fade/blink logic; 2.3–5.5 V supply | Lacks built-in fade/blink timing engines - requires MCU to update PWM registers continuously for animation | Choose PCA9634DGGR only if 8-bit intensity resolution is mandatory and MCU resources are available for animation management |
Compared with TCA6507PWG4, TCA6507PWR offers identical functionality in volume-optimized packaging, while PCA9634DGGR trades autonomous animation capability for finer intensity granularity - making TCA6507PWG4 optimal for embedded UIs prioritizing MCU offload and smooth transitions.
Availability
TCA6507PWG4 is available at Aetrix Electronics and suitable for mobile phone UI, laptop HMI, and industrial panel indicator applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TCA6507PWG4 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
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and connectivity technologies, with decades of leadership in power management and interface solutions.
The TCA6507PWG4 belongs to TI's LED driver product line, designed specifically to reduce MCU firmware burden in portable and embedded UI systems through autonomous fade, blink, and intensity control.
FAQ
What is the maximum sink current per output on the TCA6507PWG4?
The TCA6507PWG4 supports up to 40 mA sink current per output (P0–P6) under recommended operating conditions (VOL ≤ 0.6 V at VCC = 1.8–3.6 V). This is confirmed in Section 6.5 Electrical Characteristics of the datasheet. Exceeding this limit risks violating VOL specifications and thermal limits. The total P-port current must remain ≤200 mA to maintain safe operation.
Does the TCA6507PWG4 require external pull-up resistors on SDA and SCL lines?
Yes, the TCA6507PWG4 requires external pull-up resistors on both SDA and SCL lines to VCC, as specified in Section 5 (Pin Functions) and Figure 12 of the datasheet. The resistor value depends on bus capacitance and desired rise time; TI recommends 2.2 kΩ–10 kΩ for typical 100–400 pF loads. No internal pull-ups are present.
Can unused outputs on the TCA6507PWG4 be used as general-purpose open-drain GPIOs?
Yes, unused P-port outputs (P0–P6) on the TCA6507PWG4 can be configured as general-purpose open-drain outputs via I²C register programming, as stated in the Features section and Section 8.3.1. Each pin retains 5.5-V tolerance and 40 mA sink capability, making them suitable for level-shifting signals or driving small loads like reset lines.
What is the purpose of the EN pin on the TCA6507PWG4?
The EN pin on the TCA6507PWG4 is an active-high enable input. When held low, it forces the device into shutdown mode: disabling the internal oscillator, resetting all registers to default values, and placing outputs in high-impedance state. A minimum 60 µs low pulse is required for reliable reset, per Section 8.4.2.
How does the TCA6507PWG4 achieve smooth LED fading without MCU involvement?
The TCA6507PWG4 achieves smooth fading using two dedicated hardware PWM modules (PWM0 and PWM1) that autonomously generate fade-ON and fade-OFF waveforms based on programmed timing registers. These modules operate from a shared internal oscillator (28–58 kHz), eliminating the need for continuous MCU intervention - a core design feature confirmed in Sections 1 (Features) and 8.1 (Overview).
TCA6507PWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- -
- Number of Outputs:
- 7
- Voltage - Supply (Min):
- 1.65V
- Voltage - Supply (Max):
- 3.6V
- Voltage - Output:
- 5.5V
- Current - Output / Channel:
- 40mA
- Frequency:
- 100kHz, 400kHz
- Dimming:
- I2C, SMBus
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
TCA6507PWG4 FAQ
1.How can I place an order for TCA6507PWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TCA6507PWG4 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 TCA6507PWG4 reliable?
The price and inventory of TCA6507PWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCA6507PWG4 is usually 5 days.
3.What payment methods are accepted for TCA6507PWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCA6507PWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCA6507PWG4?
TCA6507PWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCA6507PWG4 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 TCA6507PWG4?
For technical support, including TCA6507PWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCA6507PWG4 requirements.
6.How does Aetrix verify that TCA6507PWG4 is sourced from the original manufacturer or authorized distributors?
All TCA6507PWG4 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 TCA6507PWG4 meets industry standards.
7.What is the process for return or replacement of TCA6507PWG4?
All TCA6507PWG4 units undergo pre-shipment inspection (PSI). If there is an issue with TCA6507PWG4, 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 TCA6507PWG4 part is unused and in its original packaging.
Return procedure for TCA6507PWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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