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Texas Instruments TLC5920DLRG4
- Part No.:
- TLC5920DLRG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
TLC5920DLRG4.pdf
- Description:
- IC LED DRIVER LINEAR 30MA 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,525
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Product details
Overview
TLC5920DLRG4 from Texas Instruments is a 16-channel × 8-bit constant-current LED driver/controller IC with integrated shift register, data latch, and 8-bit common driver. It delivers up to 30 mA per segment output and 640 mA per common output, supports 10 MHz serial clock input, operates from 4.5 V to 5.5 V logic/LED/analog supplies, and drives monocolor 16×8 dot-matrix LED displays in cathode-common configuration.
For engineers reviewing the TLC5920DLRG4 datasheet, TLC5920DLRG4 pinout, TLC5920DLRG4 application, or TLC5920DLRG4 equivalent, this page provides verified functional architecture, terminal-level design meaning, real-world timing constraints, current-setting resistor guidance, and validated alternatives for LED matrix control in industrial signage and instrumentation.
Technical Context
The TLC5920DLRG4 integrates a 16-bit serial-in/parallel-out shift register with synchronous latch control, enabling cascaded display data loading. Its 8-bit 3-to-8 decoder selects one of eight common outputs (COM0–COM7) per cycle, while the 16-bit constant-current segment drivers (S0–S15) are individually set via a single external IREF resistor.
It implements blanking via BLANK (active-high) and display select via DSEL (active-high), both independently disabling all common outputs. Timing is strictly synchronous to SCLK's rising edge, with setup/hold times of 10 ns and propagation delays ≤40 ns for segment outputs and ≤120 ns for common outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 16 constant-current segment outputs + 8 common driver outputs |
| Segment Current Range | 3 mA to 30 mA per channel, set by single external IREF resistor |
| Common Output Current | 640 mA max per COM pin, supporting high-brightness multiplexed LED arrays |
| Serial Clock Frequency | Up to 10 MHz - enables full 16-bit data load in ≤1.6 µs per frame |
| Supply Voltages | VLOG = VLED = VANA = 4.5 V to 5.5 V - single-rail compatibility simplifies power design |
| Operating Temperature | –20°C to +85°C - qualified for industrial panel and outdoor signage environments |
| Current Accuracy | ±6% max error between bits - ensures uniform brightness across 16 segments |
Pinout & Package
48-pin SSOP (DL) package with 0.5 mm pitch, JEDEC MO-118 compliant, body dimensions 10.2 mm × 5.3 mm × 1.75 mm (max height), moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BLANK (39) | Global blanking control | Active-high signal that forces all COM outputs low - used for flicker-free intensity modulation or emergency shutdown |
| CSEL0–CSEL2 (38,36,35) | Common driver select address | 3-bit binary input selecting one of eight COM outputs (COM0–COM7) per display cycle |
| DSEL (33,30) | Display enable / inverted output | Active-high disables all COM outputs; DSEL output (pin 30) mirrors inverted DSEL state for daisy-chaining |
| IREF (17) | Current reference input | Connects to GNDANA via external resistor to set all 16 segment currents simultaneously - R = 1.26 V / IOUT |
| LATCH (41) | Data latch strobe | Transfers shift register contents to output latches on rising edge - separates data loading from display update |
| SIN (42) | Serial data input | CMOS-compatible input synchronized to SCLK rising edge - accepts 16-bit display data per cycle |
| SOUT (32) | Serial data output | Shifted-out data from internal register - enables cascading multiple TLC5920DLRG4 devices |
| SCLK (40) | Serial clock input | Rising-edge-triggered clock for SIN data sampling and internal shift register advancement |
| S0–S15 (9–16,22–29) | Constant-current segment outputs | 16 open-drain, current-sink outputs - each drives one LED anode in cathode-common matrix |
| COM0–COM7 (1–4,44–47) | Common driver outputs | 8 high-current N-channel drivers - each connects to one cathode row in 8-row LED matrix |
| VLOG (34), VANA (19), VLED (8,18,31) | Power supply inputs | Separate logic (VLOG), analog (VANA), and LED driver (VLED) rails - decoupling required per rail |
| GNDLOG (37), GNDANA (21), GNDLED (5,43,48) | Ground returns | Isolated ground paths prevent noise coupling between logic, reference, and high-current LED domains |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor current programming | One external resistor on IREF sets identical 3–30 mA current across all 16 segments - eliminates per-channel trimming |
| Integrated 3-to-8 common decoder | Reduces external logic count by embedding row selection decoding - only three CSEL pins needed for eight rows |
| Cascadable serial interface | SIN/SOUT chaining allows expansion to larger displays (e.g., two TLC5920DLRG4 drive 16×16 two-color LED arrays) |
| Independent blanking and display control | BLANK and DSEL provide dual-layer disable - BLANK overrides DSEL for fail-safe blanking |
| High-speed 10 MHz serial clock | Enables >625 Hz refresh rate for 16×8 static displays or >78 Hz for 1/8-duty 16×8 multiplexed displays |
Applications
| Industrial Panel Displays | Dot-Matrix Signage |
|---|---|
Use Scenario: Driving 16×8 alphanumeric LED modules in factory HMIs and programmable logic controller interfaces. IC Role / Device Role / Timing Role: Segment driver (S0–S15) sinks current from LED anodes; COM0–COM7 sequentially energize cathode rows at 1/8 duty cycle. Use Value: ±6% current matching ensures consistent character brightness across the entire display without per-segment calibration. | Use Scenario: Controlling red/green dual-color 16×16 LED matrices in retail price boards and transit information signs. IC Role / Device Role / Timing Role: Two TLC5920DLRG4 units operate in cascade mode - one controls red layer, the other green, sharing SCLK/LATCH/BLANK. Use Value: SOUT-to-SIN daisy-chaining eliminates external shift registers and reduces PCB routing complexity by 50% vs discrete solutions. |
| Instrumentation Readouts | Test Equipment Indicators |
Use Scenario: Illuminating segmented 7-segment or custom symbol LEDs in benchtop multimeters and oscilloscope front panels. IC Role / Device Role / Timing Role: Configured in 1/8 multiplex mode with CSEL0–CSEL2 addressing individual digit cathodes; S0–S15 drive segment anodes. Use Value: 30 mA per segment supports high-luminance LEDs under ambient lighting - no external boost circuitry required. | Use Scenario: Managing status indicator LEDs (power, fault, communication) in automated test equipment racks. IC Role / Device Role / Timing Role: Used in static drive mode (no multiplexing) - all COM outputs held active; S0–S15 directly sink current from discrete LEDs. Use Value: 640 mA COM output rating allows driving up to 21 LEDs per common line at 30 mA each - reducing component count vs discrete drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED matrix driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX7219CWG+ | 8-bit serial input, 8×8 matrix support, integrated BCD decode and scan limit; no external IREF resistor - fixed current per segment | Optimized for numeric 7-segment displays; lacks 16-bit segment width and flexible current programming | Select when driving standard 7-segment modules with minimal MCU overhead - not suitable for custom 16×8 dot-matrix layouts |
| IS31FL3728-QFLS4-TR | 28-channel constant-current driver with I²C interface, auto-breathing, and PWM dimming; requires external microcontroller for sequencing | Designed for RGB LED arrays and dynamic effects; no native common-driver decoder or SOUT cascading | Choose for color-tunable indicators requiring software-controlled fade/blink - not drop-in for TLC5920DLRG4's hardware-multiplexed architecture |
Compared with MAX7219CWG+ and IS31FL3728-QFLS4-TR, the TLC5920DLRG4 uniquely combines 16-bit segment width, hardware-based 8-row multiplexing, and single-resistor current tuning - making it optimal for fixed-layout monochrome LED matrices where deterministic timing and minimal firmware intervention are critical.
Availability
TLC5920DLRG4 is available at Aetrix Electronics and suitable for industrial panel displays, dot-matrix signage, instrumentation readouts, and test equipment indicators requiring stable component supply and long-term production continuity.
Supply support for TLC5920DLRG4 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 leader delivering analog, embedded processing, and digital signal processing technologies since 1930.
The TLC5920DLRG4 belongs to TI's legacy LED driver product line, engineered specifically for cost-sensitive, high-reliability monochrome LED matrix control in industrial and commercial display systems.
FAQ
What is the maximum segment current supported by the TLC5920DLRG4?
The TLC5920DLRG4 supports a maximum segment current of 30 mA per output (S0–S15). This value is set by the external resistor connected between IREF and GNDANA, using the formula R = 1.26 V / IOUT. At 30 mA, the device maintains ±6% matching accuracy across all 16 channels, ensuring uniform LED brightness in matrix applications.
How does the TLC5920DLRG4 handle multiplexed LED displays?
The TLC5920DLRG4 handles multiplexed LED displays using its integrated 3-to-8 decoder and eight common outputs (COM0–COM7). By asserting CSEL0–CSEL2, one COM line is activated per cycle while the 16 segment drivers illuminate corresponding anodes. The BLANK pin allows precise blanking between cycles to eliminate crosstalk, and the 10 MHz SCLK enables fast refresh rates even in 1/16-duty configurations.
Can the TLC5920DLRG4 drive both red and green LEDs in a dual-color display?
Yes - the TLC5920DLRG4 can drive dual-color displays when two units are cascaded. One TLC5920DLRG4 controls the red layer and another the green layer, sharing SCLK, LATCH, BLANK, and CSEL lines while operating independent SIN/SOUT chains. Each unit drives its respective color's anodes (S0–S15) and shares the same cathode rows (COM0–COM7), enabling synchronized 16×16 two-color operation without external logic.
What is the purpose of separate VLOG, VANA, and VLED supply pins on the TLC5920DLRG4?
The TLC5920DLRG4 uses separate VLOG, VANA, and VLED supplies to isolate noise-sensitive analog reference circuitry (IREF, VREF) from digital switching (SCLK, LATCH) and high-current LED switching (COMx, Sx). VLOG powers logic gates, VANA powers the bandgap reference and current mirror, and VLED supplies the high-side drivers. This separation prevents voltage droop and switching noise from degrading current accuracy or causing logic glitches in the TLC5920DLRG4.
Is the TLC5920DLRG4 RoHS compliant and what is its MSL rating?
Yes, the TLC5920DLRG4 is RoHS compliant and carries a moisture sensitivity level (MSL) rating of Level-2, with a peak reflow temperature of 260°C for 1 year. It ships in tube packaging (25 units per tube) and is qualified for industrial temperature operation (–20°C to +85°C). The device uses NiPdAu lead finish and meets JEDEC MO-118 mechanical standards for the 48-pin SSOP (DL) package.
TLC5920DLRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Linear
- Topology:
- Shift Register
- Internal Switch(s):
- -
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 30mA
- Frequency:
- 10MHz
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
TLC5920DLRG4 FAQ
1.How can I place an order for TLC5920DLRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5920DLRG4 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 TLC5920DLRG4 reliable?
The price and inventory of TLC5920DLRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5920DLRG4 is usually 5 days.
3.What payment methods are accepted for TLC5920DLRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5920DLRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5920DLRG4?
TLC5920DLRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5920DLRG4 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 TLC5920DLRG4?
For technical support, including TLC5920DLRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5920DLRG4 requirements.
6.How does Aetrix verify that TLC5920DLRG4 is sourced from the original manufacturer or authorized distributors?
All TLC5920DLRG4 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 TLC5920DLRG4 meets industry standards.
7.What is the process for return or replacement of TLC5920DLRG4?
All TLC5920DLRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC5920DLRG4, 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 TLC5920DLRG4 part is unused and in its original packaging.
Return procedure for TLC5920DLRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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