Texas Instruments SN65LV1224BRHBR

Overview

SN65LV1224BRHBR from Texas Instruments is a 10-bit LVDS deserializer IC designed for high-speed backplane and UTP interconnects. It recovers parallel data (10-bit LVTTL) from a 12-bit LVDS serial stream at 10–66 MHz system clock rates, delivering up to 660 Mbps payload bandwidth. Key confirmed parameters: 50 mV differential input threshold, ±100 ppm clock tolerance, 850×REFCLK-period PLL lock time from power-down, industrial −40°C to +85°C operation, and 5×5 mm QFN (RHB) package.

For engineers reviewing the SN65LV1224BRHBR datasheet, SN65LV1224BRHBR pinout, SN65LV1224BRHBR application, or SN65LV1224BRHBR equivalent, this page delivers verified electrical specs, functional timing behavior, fail-safe biasing details, and real-world synchronization mode trade-offs - all grounded in TI's SLLS621E revision December 2009 documentation.

Technical Context

The SN65LV1224BRHBR implements embedded-clock recovery using a PLL locked to the 12-bit serial frame (10 data + start/stop bits), with deterministic lock via SYNC patterns or random-data acquisition. Its dual-mode synchronization supports both rapid initialization (1026-cycle SYNC pattern) and hot-insertion into live backplanes.

It features on-chip fail-safe biasing that drives LOCK high and serial inputs inactive when unconnected, preventing false lock from noise. The deserializer outputs ROUT0–ROUT9 and RCLK only when LOCK is low, with RCLK edge polarity selectable via RCLK_R/F and output drive capability rated for ≤3 CMOS loads (15 pF total) at 66 MHz.

Key Specifications

Pinout & Package

SN65LV1224BRHBR uses a 28-pin QFN package (RHB) with 0.5 mm pitch and exposed thermal pad. Pin numbering follows TI's top-view convention (pin 1 marked by dot). Analog and digital supplies are separated (AVCC/DVCC) and grounds are partitioned (AGND/DGND) to minimize coupling between PLL and logic sections.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LVDS deserializer applications.

Compared with SN65LV1224BDB and DS92LV1224MTD, SN65LV1224BRHBR delivers superior thermal performance via its QFN thermal pad, integrated fail-safe operation eliminating external components, and tighter lock-time specification - making it optimal for new industrial and telecom designs demanding reliability and layout efficiency.

Availability

SN65LV1224BRHBR is available at Aetrix Electronics and suitable for wireless base station backhaul, DSLAM line card interconnect, and industrial vision system applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN65LV1224BRHBR 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 solutions.

The SN65LV1224BRHBR belongs to TI's LVDS serializer/deserializer chipset family, engineered specifically for robust, low-jitter data transmission across noisy backplanes and unshielded cables in telecom and industrial infrastructure.

FAQ

What is the minimum and maximum REFCLK frequency supported by the SN65LV1224BRHBR?

The SN65LV1224BRHBR supports REFCLK frequencies from 10 MHz to 66 MHz, as specified in the recommended operating conditions. Operation outside this range is not guaranteed - below 10 MHz, PLL lock may fail; above 66 MHz, timing margins degrade and jitter increases beyond specification limits. The SN65LV1224BRHBR must receive a stable, low-jitter REFCLK within this band to maintain deterministic lock behavior and valid ROUTx output timing.

Does the SN65LV1224BRHBR require external components for PLL operation?

No, the SN65LV1224BRHBR requires no external components for PLL operation. Its PLL is fully integrated and self-contained, relying solely on the applied REFCLK signal and internal circuitry. This eliminates the need for external loop filters, capacitors, or inductors - reducing BOM count, board area, and tuning complexity. The SN65LV1224BRHBR achieves lock using only the REFCLK input and incoming LVDS data stream.

How does the fail-safe biasing function in the SN65LV1224BRHBR improve system reliability?

The SN65LV1224BRHBR's on-chip fail-safe circuit actively drives the RI+ and RI− inputs high and asserts LOCK high when the LVDS input is disconnected or floating. This prevents false lock caused by noise-induced transitions, ensuring the deserializer remains in a known, safe state. As a result, the SN65LV1224BRHBR avoids spurious data output or metastability during cable removal - critical for hot-pluggable telecom and industrial systems.

Can the SN65LV1224BRHBR synchronize to random data without SYNC patterns?

Yes, the SN65LV1224BRHBR supports random-data lock mode, enabling synchronization to arbitrary LVDS streams without transmitting dedicated SYNC patterns. In this mode, the deserializer detects data boundaries and locks to the embedded clock, supporting hot insertion into live backplanes. However, lock time becomes data-dependent and less deterministic than SYNC-pattern mode - the SN65LV1224BRHBR may take longer to achieve lock depending on input pattern characteristics.

What is the purpose of the RCLK_R/F pin on the SN65LV1224BRHBR?

The RCLK_R/F pin on the SN65LV1224BRHBR selects the active edge of the recovered RCLK output used to strobe the ROUT0–ROUT9 parallel data. When RCLK_R/F is high, RCLK rising edge latches data; when low, the falling edge is used. This flexibility allows precise timing alignment with downstream logic (e.g., FPGA registers), accommodating varying setup/hold requirements without external delay elements - a key feature of the SN65LV1224BRHBR's system-level integration.