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Texas Instruments TPD12S521DBTRG4
- Part No.:
- TPD12S521DBTRG4
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPD12S521DBTRG4.pdf
- Description:
- IC INTERFACE SPECIALIZED 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,169
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Product details
Overview
TPD12S521DBTRG4 from Texas Instruments is a single-chip HDMI transmitter port protection device integrating ESD clamping, TMDS signal conditioning, voltage-level shifting for control lines (CEC/DDC/HPD), and a 55-mA current-regulated 5V output (pin 38) for hot-plug detection. It delivers ±8-kV IEC 61000-4-2 contact ESD protection on TMDS and control pins, adds only 0.8-pF capacitance to TMDS lines with 0.05-pF intra-pair matching, and supports full HDMI 1.4b data rates up to >3 GHz bandwidth.
For engineers reviewing the TPD12S521DBTRG4 datasheet, TPD12S521DBTRG4 pinout, TPD12S521DBTRG4 application, or TPD12S521DBTRG4 equivalent, key selection criteria include its seamless 38-pin DBT (TSSOP) layout alignment with HDMI connector pin order, backdrive protection on all TMDS/CK/CEC/DDC/HPD outputs, integrated level-shifting eliminating external translators, and verified performance in PC, set-top box, and DVD player HDMI transmitter interfaces.
Technical Context
The TPD12S521DBTRG4 implements monolithic TVS diode arrays on all high-speed TMDS differential pairs (D2±, D1±, D0±, CK±) and low-speed control lines (CEC_IN/OUT, DDC_CLK/IN/OUT, HPD_IN/OUT), with separate 5V_SUPPLY and LV_SUPPLY bias rails enabling independent voltage domain translation. Its functional block includes parallel ESD clamps, NFET-based bidirectional level shifters, and an internal current-limited regulator driving 5V_OUT.
It operates across –40°C to +85°C with 5V_SUPPLY (4.5–5.5 V) powering TMDS clamps and 5V_OUT regulation, while LV_SUPPLY (1–3.3 V) biases level-shifters for CEC (3.3-V referenced), DDC/HPD (5-V referenced), ensuring correct logic-level translation without external components. Backdrive protection prevents reverse current flow into powered-down source ICs during hot-plug events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Protection | ±8-kV IEC 61000-4-2 contact discharge on TMDS/CK/CEC/DDC/HPD pins; ±2-kV HBM on supply/control pins |
| TMDS Capacitance | 0.8 pF per line with 0.05-pF intra-pair matching - preserves signal integrity up to 3+ GHz HDMI 1.4b data rates |
| Control Line Capacitance | 3.5 pF per DDC/CEC/HPD line - enables robust low-speed signaling without added timing skew |
| 5V_OUT Current Limit | 55 mA regulated output at pin 38 - powers HDMI sink detection circuitry even when receiver is unpowered |
| Package | 38-pin TSSOP (DBT), 0.5-mm pitch - matches HDMI connector pin spacing and routing order for zero-layout rework |
| Operating Temperature | –40°C to +85°C - qualified for consumer electronics and industrial embedded HDMI applications |
| Supply Voltages | 5V_SUPPLY: 4.5–5.5 V; LV_SUPPLY: 1–3.3 V - supports dual-rail level shifting between ASIC core and HDMI connector |
Pinout & Package
38-pin TSSOP (DBT) package, 6.40 mm × 9.70 mm body size, 0.5-mm lead pitch, RoHS-compliant NIPDAU finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 5V_SUPPLY (1) | Power input | Supplies current for 5V_OUT regulator and TMDS ESD clamps; must be bypassed with 0.1-µF capacitor |
| LV_SUPPLY (2) | Bias rail | Sets reference voltage for CEC/DDC/HPD level shifters; determines output logic thresholds |
| GND / TMDS_GND (3,5,8,11,14,25,28,31,34,36) | Ground return | Dedicated low-inductance paths for TMDS ESD clamp discharge and parasitic current return |
| TMDS_D2+/D2– (4,6,35,33) | High-speed I/O | Differential TMDS data pair with 0.8-pF clamping capacitance and backdrive protection |
| CEC_IN/OUT (16,23) | Bi-directional control | 3.3-V-referenced CEC line with level shifting and ±8-kV ESD clamping |
| HOTPLUG_DET_IN/OUT (19,20) | Hot-plug interface | 5-V-referenced HPD path with level shifting, backdrive protection, and 3.5-pF ESD capacitance |
| 5V_OUT (38) | Regulated output | 55-mA current-limited 5-V supply for HDMI sink detection - enables plug-detection with unpowered receivers |
| ESD_BYP (37) | Protection bypass | Must connect to 0.1-µF ceramic capacitor to ground to enhance ESD withstand voltage |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic TMDS ESD protection | 0.8-pF line capacitance with 0.05-pF intra-pair matching ensures minimal signal degradation at >3 GHz |
| Integrated level shifting | Eliminates need for discrete translators: CEC (3.3 V ↔ LV), DDC/HPD (5 V ↔ LV) |
| Backdrive protection | Prevents reverse current injection into powered-down HDMI transmitters on all TMDS/CK/CEC/DDC/HPD outputs |
| Seamless HDMI layout | 38-pin DBT package mirrors HDMI connector pin order and 0.5-mm pitch - no trace crossover or length mismatch |
| Hot-plug detection support | On-chip 55-mA current regulator at pin 38 powers sink detection circuitry independently of receiver power state |
Applications
| PC Graphics Output | Set-Top Box HDMI Port |
|---|---|
Use Scenario: Desktop/laptop GPU outputs HDMI video/audio to monitor or AV receiver. IC Role / Device Role / Timing Role: ESD protection and signal conditioning layer between GPU TMDS driver and HDMI connector. Use Value: Prevents system-level ESD failure during cable insertion while preserving eye diagram integrity at 1.65–3.4 Gbps. | Use Scenario: STB mainboard routes HDMI from SoC to front-panel or rear-panel connector. IC Role / Device Role / Timing Role: Dual-role interface: protects TMDS lanes and translates DDC/HPD/CEC logic levels between SoC and connector. Use Value: Reduces BOM count by replacing discrete ESD diodes + level shifters; enables reliable hot-plug detection with unpowered TVs. |
| DVD/Blu-ray Player | AV Receiver Input Port |
Use Scenario: Consumer disc player outputs HDMI to display or audio processor. IC Role / Device Role / Timing Role: Front-end protection IC on HDMI transmitter side, handling both high-speed and low-speed interface signals. Use Value: Maintains HDMI 1.4b compliance with <0.8-pF TMDS loading and eliminates need for external 5-V LDO for HPD pull-up. | Use Scenario: Multi-input AV receiver accepts HDMI from multiple sources including game consoles and streaming boxes. IC Role / Device Role / Timing Role: Input-side ESD guard for each HDMI port, providing standardized protection and level translation across all inputs. Use Value: Ensures consistent ESD immunity (IEC 61000-4-2 Level 4) and interoperability across diverse source devices with varying voltage domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar HDMI transmitter port protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD12S522DBTR | Dual-channel variant supporting two independent HDMI ports; same pinout but different internal routing and function allocation | Used where board-level space allows consolidation of two HDMI outputs onto one IC; not drop-in for single-port designs | Select TPD12S522DBTR only when protecting two HDMI transmitter ports simultaneously and PCB layout permits shared ground/power routing. |
| TPD12S016DBTR | Lower-cost variant with reduced ESD rating (±6 kV contact), no 5V_OUT regulator, and simplified level-shifting architecture | Suitable for cost-sensitive, non-critical HDMI applications lacking hot-plug detection requirements | Choose TPD12S016DBTR only if system does not require 55-mA 5V_OUT for sink detection and can accept lower ESD immunity margin. |
Compared with TPD12S522DBTR and TPD12S016DBTR, the TPD12S521DBTRG4 uniquely combines full ±8-kV ESD protection, integrated 55-mA 5V regulator, and precise 0.05-pF TMDS matching - making it the only option qualified for robust HDMI 1.4b transmitter protection in premium consumer and industrial equipment.
Availability
TPD12S521DBTRG4 is available at Aetrix Electronics and suitable for PC graphics outputs, set-top box HDMI interfaces, and DVD/Blu-ray player transmitter ports requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for TPD12S521DBTRG4 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 specializing in analog, embedded processing, and connectivity technologies, with over 90 years of innovation in high-reliability electronic components.
The TPD12S521DBTRG4 belongs to TI's HDMI interface protection product line, engineered specifically to solve ESD vulnerability and level-shifting complexity in next-generation HDMI transmitter designs for consumer and professional AV equipment.
FAQ
What is the primary function of the TPD12S521DBTRG4 in an HDMI system?
The TPD12S521DBTRG4 serves as a single-chip HDMI transmitter port protection device, integrating ESD clamping for TMDS and control lines, voltage-level shifting for CEC/DDC/HPD signals, and a 55-mA regulated 5V output for hot-plug detection. It replaces discrete ESD diodes and level shifters, reducing BOM count while maintaining signal integrity up to HDMI 1.4b data rates. The TPD12S521DBTRG4 is designed to absorb system-level ESD strikes per IEC 61000-4-2 Level 4 without degrading differential signal quality.
Does the TPD12S521DBTRG4 require external passive components for basic operation?
Yes - the TPD12S521DBTRG4 requires three mandatory external 0.1-µF ceramic capacitors: one between 5V_SUPPLY and GND, one between LV_SUPPLY and GND, and one between ESD_BYP (pin 37) and GND. These bypass capacitors stabilize supply rails and enhance ESD withstand capability. No external resistors or level shifters are needed, as voltage translation and current regulation are fully integrated within the TPD12S521DBTRG4.
How does the TPD12S521DBTRG4 support hot-plug detection when the HDMI sink is powered off?
The TPD12S521DBTRG4 provides a dedicated 55-mA current-regulated 5V output at pin 38 (5V_OUT), which powers the sink's hot-plug detect (HPD) circuitry independently of the sink's main power rail. This allows the source device to sense HPD assertion even when the connected display or receiver is completely unpowered. The TPD12S521DBTRG4's internal regulator maintains stable 5V_OUT under load, enabling reliable plug-detection functionality without requiring an external LDO or charge pump.
Can the TPD12S521DBTRG4 be used with HDMI 2.0 or higher data rates?
No - the TPD12S521DBTRG4 is specified and characterized for HDMI 1.3 and HDMI 1.4b, with a –3 dB bandwidth exceeding 3 GHz. HDMI 2.0 (6 Gbps) and HDMI 2.1 (up to 48 Gbps) demand significantly lower channel capacitance (<0.3 pF), tighter impedance control, and enhanced equalization not supported by the TPD12S521DBTRG4. For HDMI 2.0+, TI recommends newer solutions such as the TPD12S523 or discrete ultra-low-capacitance ESD arrays. The TPD12S521DBTRG4 remains optimal for legacy and cost-sensitive HDMI 1.4b implementations.
What is the significance of the "G4" suffix in TPD12S521DBTRG4?
The "G4" suffix in TPD12S521DBTRG4 denotes TI's green packaging standard: lead-free (Pb-free), RoHS-compliant construction with NiPdAu (NIPDAU) lead finish and halogen-free molding compound. It indicates full compliance with JEDEC J-STD-020 moisture sensitivity Level-2a (260°C peak reflow, 1-year floor life) and TI's environmental specifications. The TPD12S521DBTRG4 shares identical electrical, thermal, and mechanical characteristics with TPD12S521DBTR but meets stricter eco-regulatory requirements for global market deployment.
TPD12S521DBTRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Applications:
- Personal Computers, CAD/CAM/CAE Workstation, Point-of-Sale Terminals, Audio/Visual Devices, Limited Space Areas
- Interface:
- HDMI
- Voltage - Supply:
- 5V ~ 5.5V
- Supplier Device Package:
- 38-TSSOP
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TPD12S521DBTRG4 FAQ
1.How can I place an order for TPD12S521DBTRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPD12S521DBTRG4 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 TPD12S521DBTRG4 reliable?
The price and inventory of TPD12S521DBTRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPD12S521DBTRG4 is usually 5 days.
3.What payment methods are accepted for TPD12S521DBTRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPD12S521DBTRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPD12S521DBTRG4?
TPD12S521DBTRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPD12S521DBTRG4 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 TPD12S521DBTRG4?
For technical support, including TPD12S521DBTRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPD12S521DBTRG4 requirements.
6.How does Aetrix verify that TPD12S521DBTRG4 is sourced from the original manufacturer or authorized distributors?
All TPD12S521DBTRG4 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 TPD12S521DBTRG4 meets industry standards.
7.What is the process for return or replacement of TPD12S521DBTRG4?
All TPD12S521DBTRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPD12S521DBTRG4, 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 TPD12S521DBTRG4 part is unused and in its original packaging.
Return procedure for TPD12S521DBTRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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