Texas Instruments SN65DPHY440SSRHRT

Overview

SN65DPHY440SS from Texas Instruments is a MIPI® DPHY 1.1-compliant retimer IC for CSI-2/DSI interfaces, supporting up to 4 data lanes + clock at 1.5 Gbps (750 MHz HS clock), with configurable RX equalization (0/2.5/5 dB), adjustable TX voltage swing (200–220 mV), and dynamic data/clock skew compensation. It enables robust signal integrity in notebook PCs, tablets, and camera modules with long PCB traces or flexible cables.

For engineers reviewing the SN65DPHY440SS datasheet, SN65DPHY440SS pinout, SN65DPHY440SS application, or SN65DPHY440SS equivalent, this page delivers verified electrical specs, industrial-temperature operation (–40°C to 85°C), WQFN-28 package details, I²C-configurable timing controls, and real-world MIPI link optimization parameters - all validated against TI's official SLLSEO9D production datasheet (October 2024 revision).

Technical Context

The SN65DPHY440SS implements a full DPHY 1.1 retiming pipeline: HS receivers with 3-level programmable equalization (sampled at RSTN rising edge) compensate for channel loss up to 750 MHz; HS transmitters support 2.5 dB pre-emphasis and 3-level voltage swing control via VSADJ_CFG0/PRE_CFG1 pins; dynamic de-skew aligns data to clock with 4-UI latency in HS mode only.

It integrates dual-mode LP/ULPS state detection, bidirectional LP backchannel on lane 0 (DA0P/N ↔ DB0P/N), and activity-aware power management - transitioning automatically between shutdown (<1 mW), LP (14 mW), and active HS modes (115–150 mW). All I/Os meet MIPI DPHY 1.1 electrical requirements including 100-Ω differential impedance, ±3 kV HBM ESD, and 1.8 V single-supply operation.

Key Specifications

Pinout & Package

SN65DPHY440SS uses a 28-pin WQFN package (5.5 mm × 3.5 mm, 0.4 mm pitch) with exposed thermal pad. Pin functions are sampled at RSTN rising edge for configuration; I²C interface shares EQ/SCL and ERC/SDA pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar MIPI DPHY retimer applications.

Compared with SN65DPHY440SST and SN65DPHY440SRHRT, the SN65DPHY440SS offers identical retiming functionality and industrial temperature rating, differing only in packaging format and moisture sensitivity - making it the baseline reference part for design-in, qualification, and schematic symbol definition.

Availability

SN65DPHY440SS is available at Aetrix Electronics and suitable for notebook PCs, tablet displays, automotive camera modules, and industrial vision systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for SN65DPHY440SS 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 solutions, with decades of MIPI interface IP development and automotive-grade qualification expertise.

The SN65DPHY440SS belongs to TI's MIPI DPHY retimer product line, engineered specifically to solve signal integrity degradation in mobile and embedded vision/display links - targeting high-reliability, low-power, and layout-flexible system integration.

FAQ

What is the maximum supported MIPI DPHY data rate for SN65DPHY440SS?

The SN65DPHY440SS supports up to 1.5 Gbps per lane with a corresponding HS clock range of 100–750 MHz, fully compliant with MIPI DPHY 1.1 specification. This enables high-bandwidth applications such as 4K@30fps DSI video or 12MP@30fps CSI-2 imaging without signal degradation across lossy interconnects. The device maintains timing margins via dynamic deskew and configurable equalization at these rates.

Does SN65DPHY440SS support bidirectional LP communication on all lanes?

No. SN65DPHY440SS supports bidirectional LP signaling only on lane 0 (DA0P/N ↔ DB0P/N), as required by MIPI DSI for host-peripheral backchannel communication. Lanes 1–3 and clock are unidirectional in LP mode. This is explicitly defined in the datasheet's LP Mode section and confirmed by pin function tables - no other lanes provide reverse-path LP capability.

How is RX equalization configured on SN65DPHY440SS?

RX equalization on SN65DPHY440SS is set by the voltage state of the EQ/SCL pin sampled at the rising edge of RSTN: ≤VIL = 0 dB, VIM = 2.5 dB at 750 MHz, ≥VIH = 5 dB at 750 MHz. This hardware configuration avoids I²C initialization delay. Alternatively, the RXEQ register can be written via I²C (address 0xD8) for runtime adjustment - both methods yield identical equalization performance.

What power consumption can be expected in active HS mode with 4 lanes?

In active HS mode driving 4 data lanes + clock at 1 Gbps, SN65DPHY440SS consumes 150 mW (typical) with stable 1.8 V supply. At lower lane counts (e.g., 2 lanes + clock), power drops to 115 mW. In LP11 state, consumption is 14 mW; in RSTN-asserted shutdown, it falls below 1 mW - enabling aggressive power gating in mobile and battery-powered systems.

Is SN65DPHY440SS compatible with both MIPI CSI-2 and DSI protocols?

Yes. SN65DPHY440SS is protocol-agnostic at the physical layer: it regenerates DPHY signaling for both MIPI CSI-2 (camera) and DSI (display) applications, supporting identical electrical characteristics, timing, and power states for either. The datasheet explicitly confirms dual-use capability in Section 3 and Functional Block Diagram - no hardware or configuration changes are needed to switch between protocols.