Texas Instruments SN65LVDS311YFFR

Overview

SN65LVDS311 from Texas Instruments is a programmable 27-bit display serial interface transmitter that converts 24-bit RGB, 3 control (HS/VS/DE), and 1 parity bit into SubLVDS serial data over 1–3 differential links. It locks to pixel clocks from 4 MHz to 65 MHz, supports QVGA/VGA/XGA displays, and integrates PLL-based serialization with active standby and shutdown modes for power-sensitive embedded video systems.

For engineers reviewing the SN65LVDS311 datasheet, SN65LVDS311 pinout, SN65LVDS311 application, or SN65LVDS311 equivalent, this page delivers verified technical context on SubLVDS serialization modes, pixel clock–driven PLL behavior, power-state transitions, real-world timing latency, and precise terminal-level design meaning - all critical for display interface layout, EMI control, and low-power video subsystem validation.

Technical Context

The SN65LVDS311 implements a fully integrated PLL architecture that multiplies PCLK by ×10, ×15, or ×30 depending on LS0/LS1 configuration, generating internal high-speed clocks for 3-channel (10-bit/link), 2-channel (15-bit/link), or 1-channel (30-bit/link) serialization. It adds odd parity over 27 payload bits and two reserved bits, forming a fixed 30-bit frame per cycle.

Three distinct power states are hardware-managed: Shutdown (TXEN = low, ~0.5 µA), Standby (PCLK < 500 kHz, ~0.5 µA), and Active (PCLK > 3 MHz, 17.4–44.5 mW typ). Glitch-suppressed TXEN requires ≥10 µs assertion/deassertion, and PCLK must never float - all CMOS inputs include failsafe protection.

Key Specifications

Pinout & Package

SN65LVDS311 is housed in a 2.8 mm × 2.8 mm, 42-pin YFF (DSBGA) package with 0.4 mm pitch and bottom-side ball array. Power domains are segregated: VDD (core), VDDPLLA/VDDPLLD (PLL analog/digital), and VDDLVDS (SubLVDS I/O), each requiring dedicated decoupling and ground plane routing per TI layout guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar display serializer applications.

Compared with SN65LVDS301, SN65LVDS311 adds parity and extends PCLK support to 65 MHz for XGA; compared with SN65LVDS314, it trades LVDS noise immunity for SubLVDS power/EMI advantages - making SN65LVDS311 optimal for compact, battery-powered, high-resolution embedded displays.

Availability

SN65LVDS311YFFR is available at Aetrix Electronics and suitable for mobile display interfaces, industrial HMIs, automotive camera modules, and embedded vision systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SN65LVDS311YFFR 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 decades of expertise in high-speed interface ICs and display solutions.

The SN65LVDS311 belongs to TI's LVDS display serializer family, designed specifically for low-power, high-resolution video transport between processors and LCD panels in space-constrained portable and industrial systems.

FAQ

What is the minimum pixel clock frequency required to keep SN65LVDS311 in active transmit mode?

The SN65LVDS311 requires a pixel clock frequency above 3 MHz to remain in active transmit mode. If PCLK falls below 500 kHz, the device automatically enters standby mode to conserve power. Between 500 kHz and 3 MHz, behavior is undefined - the PLL may intermittently lock, risking data errors. For reliable operation, maintain PCLK ≥ 3 MHz in active mode, and ensure PCLK is never left floating.

How does the SN65LVDS311 handle parity generation and what data bits are covered?

The SN65LVDS311 calculates odd parity over exactly 27 bits: the 24 RGB pixel data bits plus HS, VS, and DE control bits. The two reserved bits (bit 28 and bit 29) are excluded from parity calculation. The parity bit is set if the sum of those 27 bits contains an even number of 1s, enabling the receiver to detect single-bit transmission errors - a key reliability feature in SN65LVDS311 applications.

Can SN65LVDS311YFFR operate with a 1.65 V supply voltage?

Yes, SN65LVDS311YFFR is fully specified to operate across a 1.65 V to 1.95 V supply range for all rails (VDD, VDDPLLA, VDDPLLD, VDDLVDS). At 1.65 V, typical power consumption remains within datasheet limits, and all timing parameters - including setup/hold times and propagation latency - meet specifications. This makes SN65LVDS311YFFR compatible with modern low-voltage SoC I/O domains.

What happens to SN65LVDS311 outputs during shutdown mode?

When TXEN is held low for >10 µs, SN65LVDS311YFFR enters shutdown mode: the PLL, serializer, and SubLVDS output drivers are fully disabled. All differential outputs (D0±, D1±, D2±, CLK±) go high-impedance, and CMOS inputs remain active but protected by failsafe circuitry. Supply current drops to ~0.5 µA, making SN65LVDS311 ideal for rapid, low-power display blanking in battery-operated devices.

Is SN65LVDS311YFFR pin-compatible with SN65LVDS301?

Yes, SN65LVDS311YFFR is pin-compatible with SN65LVDS301 in the same YFF package - sharing identical ball map, power domains, and signal assignments. However, SN65LVDS311 adds parity functionality and extends PCLK support to 65 MHz, while SN65LVDS301 omits parity and caps at 40 MHz. Layout reuse is possible, but firmware and timing validation must account for these functional differences in SN65LVDS311YFFR.