Specifications
| Type | Description |
|---|---|
| Part Number | SN75DP126 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Input Interface | One Dual-Mode DisplayPort (DP++) input; switchable to one DP++ output or one TMDS output |
| Output Interfaces | One DP++ sink output or one HDMI/DVI sink output; selected by device switching function |
| DisplayPort Standard Support | DP v1.1a and DP v1.2; includes HBR2 signaling |
| Maximum DisplayPort Data Rate | 5.4 Gbps; HBR2 data rate |
| HDMI Standard Support | HDMI 1.4b; TMDS output mode |
| DVI Standard Support | DVI 1.0; TMDS translator output |
| Maximum TMDS Clock Frequency | 340 MHz; HDMI 1.4b, with 10 m cable |
| Maximum TMDS Data Rate | 3.4 Gbps; HDMI/DVI output |
| Supported Resolution | Greater than 1920 x 1440; HDMI/DVI output |
| HDTV Deep Color Support | 1080p deep color; HDMI/DVI output |
| Input Equalizer | Highly configurable variable equalizer with selectable boost settings; DP++ Main Link signal inputs |
| DisplayPort Output Voltage Swing Settings | Four primary differential output voltage swing levels; DP++ Main Link output, programmable through I2C |
| DisplayPort Output Pre-Emphasis Settings | Four primary pre-emphasis levels; DP++ Main Link output, programmable through I2C |
| Output Boost Adjustment | Secondary boost adjustment level; Main Link output fine tuning through I2C |
| Link Training Auto Configuration | Automatically adjusts output signaling levels and input equalizers; based on DP AUX channel Link Training commands |
| DP-HDMI Adapter ID Buffer | Integrated DDC-accessible adapter ID buffer; accessible when HDMI/DVI sink is selected |
| ESD Protection | 2 kV HBM; Human Body Model |
| Operating Temperature Range | 0°C to 85°C; extended operational temperature range |
| Package | WQFN-56; thermal pad, top-view package shown |
| Package Body Size | 11.00 mm x 5.00 mm; nominal body size |
| Device Options | Single-supply SN75DP126SS and dual-supply SN75DP126DS; RHU package variants shown |
| Standby Power Dissipation | Approximately 2 mW typical; standby mode when no video sink is connected |
| DisplayPort Main Link Input Impedance | 100 Ω differential; IN0-IN3 DisplayPort Main Link differential inputs |
| DisplayPort Main Link Output Impedance | 100 Ω differential; DP_OUT0-DP_OUT3 DisplayPort Main Link differential outputs |
| TMDS Output Impedance | 100 Ω differential; TMDS clock and data differential outputs |
| Source DDC Pull-Up Resistance | 60 kΩ integrated pull-up resistors; SCL_SRC and SDA_SRC terminals |
| DP HPD Sink Input Tolerance | 5 V tolerant; DP_HPD_SNK input |
| DP HPD Sink Pull-Down Resistance | 130 kΩ integrated pull-down resistor; DP_HPD_SNK input |
| TMDS HPD Sink Input Tolerance | 5 V tolerant; TMDS_HPD_SNK input |
| TMDS HPD Sink Pull-Down Resistance | 130 kΩ integrated pull-down resistor; TMDS_HPD_SNK input |
| CAD_SNK External Resistor | 1 MΩ to GND recommended; DisplayPort Cable Adapter Detect input |
| VSadj Recommended Resistor | 4.7 kΩ to GND; provides typical HDMI/DVI sink differential voltage swing of 1000 mV |
| VSadj Swing Adjustment Slope | Approximately 2 mV per 100 Ω; VSadj resistor values of 4.7 kΩ ± 1 kΩ |
| HDMI_EN# Low Function | HDMI 1.4b compliant output; HDMI/DVI sink selected and HDMI_EN# input low |
| HDMI_EN# High Function | DVI 1.0 compliant output; HDMI/DVI sink selected and HDMI_EN# input high |
| I2C Local Address Option 1 | 0x58 write, 0x59 read; I2C_CTL_EN input between VIL and VIH |
| I2C Local Address Option 2 | 0x5A write, 0x5B read; I2C_CTL_EN input high |
| Datasheet Status | request_only |
Product Overview
The SN75DP126 is a Texas Instruments DisplayPort re-driver switch for systems using one Dual-Mode DisplayPort input and a selectable DP++ or TMDS sink output. In DisplayPort operation, it supports DP v1.1a and DP v1.2, including HBR2 signaling at up to 5.4 Gbps. In TMDS mode, it supports HDMI 1.4b and DVI 1.0 with output operation up to a 340 MHz TMDS clock and 3.4 Gbps data rate.
Key Features
- One DP++ input switches to DP++ or TMDS output
- Supports DP v1.1a and DP v1.2 HBR2 signaling
- Maximum DisplayPort data rate is 5.4 Gbps
- HDMI 1.4b and DVI 1.0 TMDS output modes
- TMDS output supports 340 MHz clock frequency
- Configurable input equalizer with selectable boost settings
- I2C-programmable DP output swing and pre-emphasis levels
- Automatic link-training adjustment through DP AUX channel commands
- Integrated DDC-accessible adapter ID buffer for HDMI/DVI selection
- WQFN-56 package with 11.00 mm x 5.00 mm body
Typical Applications
- Dual-mode DisplayPort source routing
- DP++ to HDMI sink interfaces
- DP++ to DVI sink interfaces
- DisplayPort HBR2 signal conditioning
- HDMI/DVI TMDS output translation
- Display adapter detect circuits
- I2C-configured display interface designs
Procurement Notes
When requesting a quote for SN75DP126, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What input and outputs does the SN75DP126 support?
The SN75DP126 has one Dual-Mode DisplayPort input. Its switching function selects either one DP++ sink output or one HDMI/DVI sink output, allowing the same input path to support DisplayPort or TMDS output operation.
What data rates are supported by the SN75DP126?
For DisplayPort operation, the device supports DP v1.1a and DP v1.2 with HBR2 signaling up to 5.4 Gbps. For HDMI/DVI output operation, it supports a maximum TMDS data rate of 3.4 Gbps.
How is the SN75DP126 configured for signal conditioning?
The device includes a configurable variable input equalizer with selectable boost settings. DisplayPort output voltage swing, pre-emphasis, and secondary boost adjustment are programmable through I2C, with automatic adjustment available through DP AUX channel link-training commands.
What package is used for the SN75DP126?
The SN75DP126 is provided in a WQFN-56 package. The extracted package information identifies a 56-pin WQFN with thermal pad and an 11.00 mm x 5.00 mm nominal body size.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.