Texas Instruments SN75DPHY440SSRHRT

Overview

SN75DPHY440SS 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, operating across 0°C to 70°C, with configurable RX equalization (0/2.5/5 dB), adjustable TX voltage swing (200–220 mV), and dynamic clock-data skew compensation. It enables low-cost cable solutions in mobile camera and display interconnects.

For engineers reviewing the SN75DPHY440SS datasheet, SN75DPHY440SS pinout, SN75DPHY440SS application, or SN75DPHY440SS equivalent, this page delivers verified electrical specs, thermal metrics, I²C-configurable timing controls (EQ/SCL, ERC/SDA), HS/LP mode behavior, and real-world implementation constraints for CSI-2 sink-to-source signal integrity restoration.

Technical Context

The SN75DPHY440SS implements a full DPHY 1.1 retiming pipeline: HS receiver with 3-level programmable equalization (sampled at RSTN rising edge), dynamic de-skew that centers data within the clock (4 UI delay), and HS transmitter with selectable pre-emphasis (0/2.5 dB) and voltage swing (200/220 mV). It supports bidirectional LP mode on Lane 0 only.

Its functional architecture includes independent LP/ULPS state detection circuitry, activity-aware power management, and dual-role I²C pins (EQ/SCL and ERC/SDA) enabling runtime register access at ≤100 kHz. All HS timing parameters-including tSKEW-TX-1P5G (±0.15 UI), tSETUP-RX-1P5G (0.15 UI), and tHOLD-RX-1P5G (0.15 UI)-are guaranteed across the commercial temperature range.

Key Specifications

Pinout & Package

SN75DPHY440SS uses a 28-pin WQFN package (5.5 mm × 3.5 mm) 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 DPHY retimer applications.

Compared with SN65DPHY440SS and SN75DPHY440RSMT, the SN75DPHY440SS provides identical DPHY 1.1 retiming capability in the smallest footprint (5.5 × 3.5 mm) optimized for commercial mobile designs where cost, size, and 0–70°C operation are primary constraints.

Availability

SN75DPHY440SS is available at Aetrix Electronics and suitable for notebook PCs, tablets, clamshell devices, and embedded camera modules requiring stable component supply with full traceability and no obsolescence risk through 2030.

Supply support for SN75DPHY440SS 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 and embedded processing technologies, with leadership in interface, power management, and signal chain solutions.

The SN75DPHY440SS belongs to TI's MIPI DPHY retimer product line, designed specifically to solve signal integrity degradation in high-speed mobile imaging and display interconnects using flexible printed circuits and low-cost connectors.

FAQ

What is the maximum supported MIPI DPHY data rate for SN75DPHY440SS?

The SN75DPHY440SS supports up to 1.5 Gbps per lane in HS mode, compliant with MIPI DPHY 1.1 specification. This rate is validated across the full commercial temperature range (0°C to 70°C) and includes guaranteed timing margins such as tSKEW-TX-1P5G (±0.15 UI) and tSETUP-RX-1P5G (0.15 UI).

Does SN75DPHY440SS support bidirectional LP communication like MIPI DSI requires?

Yes, the SN75DPHY440SS supports bidirectional LP signaling exclusively on Lane 0 (DB0P/N ↔ DA0P/N), enabling DSI peripheral responses such as ACK/NACK and error reporting. Lanes 1–3 and the clock lane operate unidirectionally (source-to-sink only) in LP mode.

How is RX equalization configured on SN75DPHY440SS?

RX equalization on SN75DPHY440SS is set by the logic level on the EQ/SCL pin at the rising edge of RSTN: ≤VIL selects 0 dB, VIM selects 2.5 dB at 750 MHz, and ≥VIH selects 5 dB at 750 MHz. The same pin serves as I²C SCL for runtime register writes to the RXEQ register if needed.

Can SN75DPHY440SS be used in systems requiring ULPS mode operation?

Yes, the SN75DPHY440SS continuously monitors the DPHY LP protocol and automatically enters ULPS mode upon detecting the correct entry sequence. It maintains LP state machine and transceiver logic active while disabling HS blocks, achieving sub-mW quiescent power during display/camera idle states.

What package and thermal characteristics does SN75DPHY440SS have?

SN75DPHY440SS uses a 28-pin WQFN package (5.5 mm × 3.5 mm) with exposed thermal pad. Its junction-to-ambient thermal resistance is 42.1°C/W, junction-to-board is 12.8°C/W, and it dissipates 150 mW under full 4-lane active operation at 1 Gbps-enabling reliable operation on 2-layer mobile PCBs without heatsinks.