Texas Instruments SCAN921025SLC/NOPB

Overview

SCAN921025SLC/NOPB from Texas Instruments is a 10-bit parallel-to-serial LVDS serializer IC for high-speed backplane and cable interconnects. It converts 10-bit LVCMOS/LVTTL data plus 2 control bits into an 800 Mbps Bus LVDS serial stream with embedded clock, operates at 30–80 MHz input clock rates, features IEEE 1149.1 JTAG compliance and at-speed BIST, and targets high-integrity data transmission in telecom line cards and industrial control backplanes.

For engineers reviewing the SCAN921025SLC/NOPB datasheet, SCAN921025SLC/NOPB pinout, SCAN921025SLC/NOPB application, or SCAN921025SLC/NOPB equivalent, key selection criteria include its 49-pin NFBGA package, 27 Ω differential load rating, programmable clock edge (TCLK_R/F), synchronization mode support, and tri-state enable (DEN) for dynamic bus management.

Technical Context

The SCAN921025SLC/NOPB implements a PLL-based serialization architecture that embeds start/stop bits as clock markers within each 12-bit frame (10 data + 2 framing bits), enabling deterministic clock recovery without a separate clock line. Its Bus LVDS output drives a single differential pair at up to 960 Mbps (12×TCLK), delivering 800 Mbps payload at 80 MHz TCLK.

It supports three operational states-Initialization, Data Transfer, and Resynchronization-and two low-power modes: Powerdown (PWRDN) and TRI-STATE (DEN). JTAG test access and RUNBIST at-speed interconnect testing are integrated per IEEE 1149.1, with lock detection via LOCK signal and false-lock prevention against repetitive multi-transition (RMT) patterns on DIN0–DIN8.

Key Specifications

Pinout & Package

SCAN921025SLC/NOPB uses a 49-lead NFBGA package (7 mm × 7 mm, 0.8 mm pitch) with exposed thermal pad. Pin assignment follows TI's standardized layout for Bus LVDS serializer devices, optimized for signal integrity and thermal dissipation in high-density backplane applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX9205GTJ+T and SN65LVDS31DR, SCAN921025SLC/NOPB uniquely delivers 10-bit serialization with embedded clock, IEEE 1149.1 testability, and at-speed BIST-making it the only option among the three qualified for high-assurance, testable backplane designs requiring deterministic latency and field-diagnosable interconnects.

Availability

SCAN921025SLC/NOPB is available at Aetrix Electronics and suitable for telecom line card interconnects, industrial PLC backplanes, medical imaging data links, and avionics sensor aggregation requiring stable component supply and long-term lifecycle support.

Supply support for SCAN921025SLC/NOPB 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 and industrial-grade reliability.

SCAN921025SLC/NOPB belongs to TI's legacy Bus LVDS serializer family, designed specifically for noise-immune, low-skew, high-bandwidth parallel-to-serial conversion in mission-critical backplane and cable applications where testability and deterministic timing are mandatory.

FAQ

What is the maximum data rate supported by SCAN921025SLC/NOPB?

SCAN921025SLC/NOPB supports a serial data rate of 960 Mbps (12×TCLK) with an 800 Mbps payload rate (10×TCLK) at 80 MHz input clock. The device is specified for 30–80 MHz TCLK operation, and its Bus LVDS output is rated for 27 Ω differential load with 290 mV typical differential voltage, ensuring reliable transmission over controlled-impedance backplanes and UTP cables.

Does SCAN921025SLC/NOPB support JTAG boundary-scan testing?

Yes, SCAN921025SLC/NOPB is fully compliant with IEEE 1149.1 (JTAG) standard. It includes a dedicated Test Access Port (TAP) with TCK, TMS, TDI, TDO, and TRST pins, enabling boundary-scan testing of all LVCMOS/LVTTL digital I/Os. Additionally, it supports EXTEST and RUNBIST instructions for go/no-go and at-speed interconnect validation with BER <10⁻⁷.

How does SCAN921025SLC/NOPB handle clock recovery without a separate clock line?

SCAN921025SLC/NOPB embeds clock information by inserting start and stop bits (always high/low) into every 12-bit frame (10 data + 2 framing bits). This embedded clock enables the companion deserializer (SCAN921226) to recover timing deterministically-eliminating clock-to-data skew and removing the need for a dedicated clock trace. The PLL locks to transitions in the serial stream, not an external reference.

What package type and pin count does SCAN921025SLC/NOPB use?

SCAN921025SLC/NOPB uses a 49-lead NFBGA package (7 mm × 7 mm, 0.8 mm pitch) with exposed thermal pad. This compact, thermally enhanced package supports high-density routing in space-constrained backplane applications and is compatible with standard reflow profiles for lead-free assembly. Pin functions include DIN0–DIN9, TCLK, TCLK_R/F, SYNC1/SYNC2, DEN, PWRDN, and DO±.

Can SCAN921025SLC/NOPB operate with a 3.0 V supply?

Yes, SCAN921025SLC/NOPB operates across a recommended supply range of 3.0 V to 3.6 V. At 3.0 V, it maintains full functionality-including JTAG, BIST, and Bus LVDS output compliance-with adjusted DC parameters (e.g., VIH ≥ 2.0 V, VOL ≤ 0.5 V). Electrical characteristics are guaranteed over −40°C to +85°C ambient, making it suitable for wide-temperature industrial deployments.