DS15BR400TSQ/NOPB - 4-Ch LVDS Buffer 2Gbps | TI
N.º da peça: DS15BR400TSQ/NOPB ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $10.47 | $10,47 |
| 10 | $9.42 | $94,20 |
| 100 | $8.61 | $861,00 |
| 500 | $7.92 | $3.960,00 |
| 1.000 | $7.33 | $7.330,00 |
DS15BR400TSQ/NOPB Visão geral
An LVDS (Low-Voltage Differential Signaling) buffer/repeater is an interface IC that regenerates high-speed differential signal streams. Within the signal-chain hierarchy of interface ICs, repeaters sit between a differential line driver and receiver, restoring signal amplitude and timing integrity across lossy interconnects such as backplanes, cables, and connectors where ISI (inter-symbol interference) jitter degrades the eye diagram.
Key features include a 2 Gbps per-channel data rate, flow-through pinout that minimizes internal device jitter and simplifies board layout, and pre-emphasis that overcomes ISI jitter effects from lossy backplanes and cables. Propagation delay is typically 1.0 ns with only 3 pF input capacitance, reducing loading on the source driver. The differential inputs interface to LVDS and Bus LVDS signals, such as those on TI 10-, 16-, and 18-bit bus LVDS devices.
The device is powered from a single 3.3V supply and consumes 578 mW typical (about 215 mA supply current). It operates over the -40C to +85C industrial temperature range, making it suitable for factory-floor and telecom equipment environments. The space-saving WQFN-32 exposed-pad package aids thermal dissipation and supports high-speed signal routing.
Typical applications include backplane signal conditioning in telecom and data communication equipment, point-to-point LVDS link extension across cables and connectors, and clock or data distribution to imaging and display subsystems where jitter must be minimized.
When designing with this device, keep inter-pair skew matched on the flow-through routing and use the pre-emphasis setting matched to the length of the lossy channel; excessive pre-emphasis can overdrive short channels.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas drop-in para DS15BR400TSQ/NOPB — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
DS15BR401TSQ/NOPB
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
DS15BR400TSQ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
DS15BR400TSQ/NOPB Especificações
| Função | 4-channel LVDS buffer/repeater |
| Maximum Data Rate | 2 Gbps |
| Canais | 4 |
| Tensão de alimentação | 3 V to 3.6 V (3.3 V typical) |
| Corrente de alimentação | 215 mA |
| Power Consumption | 578 mW (typical) |
| Propagation Delay | 1.0 ns |
| Capacitância de entrada | 3 pF |
| Input Interface | LVDS, Bus LVDS |
| Pre-Emphasis | Yes (overcomes ISI jitter from lossy backplanes and cables) |
| Pinout Style | Flow-through |
| Temperatura de operação | -40C to +85C |
| Encapsulamento | 32-WQFN (RTV), 5x5 mm, exposed pad |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant (NOPB suffix) |
| Brand Prefix | Original National Semiconductor product line, now Texas Instruments |
Guia de Configuração de Pinos do DS15BR400TSQ/NOPB 32-wqfn (rtv), 5x5 mm, exposed pad
Configuração de pinos para DS15BR400TSQ/NOPB (pacote 32-wqfn (rtv), 5x5 mm, exposed pad). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para DS15BR400TSQ/NOPB.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
DS15BR400TSQ/NOPB é adequado para 6 aplicaçãos: Telecom Backplane Signal Repeating, High-Speed Cable Interconnect Extension, Clock and Data Distribution, Imaging and Display Subsystem Links, Industrial Automation Links, Data Communication Equipment.
Telecom Backplane Signal Repeating
The DS15BR400TSQ/NOPB was designed explicitly for lossy backplane environments: its pre-emphasis output compensates for inter-symbol interference (ISI) jitter accumulated across long, lossy backplane traces, while the flow-through pinout allows clean through-board routing of all four differential pairs without crossovers. With a 2 Gbps per-channel rate and 1.0 ns propagation delay, it regenerates LVDS and Bus LVDS eyes mid-backplane so downstream receivers see a restored signal. Place it at the mid-point of a degraded channel; trade-off is the 578 mW typical power per device and the need to match pre-emphasis to trace length.
Recomendado
High-Speed Cable Interconnect Extension
For point-to-point LVDS links spanning shielded twisted-pair or flex cable assemblies, the DS15BR400TSQ/NOPB restores signal amplitude and timing at the receive end. The low 3 pF input capacitance minimizes loading on the source driver, and Bus LVDS input compatibility lets it interface directly with TI 10-, 16-, and 18-bit Bus LVDS serializer families. Estimated: at 2 Gbps a 1.0 ns repeater delay adds only about two bit periods, negligible for pipeline protocols. Route each differential pair at 100 ohm differential impedance with length matching within 5 mils intra-pair to preserve the regenerated eye.
Recomendado
Clock and Data Distribution
The DS15BR400TSQ/NOPB fans out and refreshes high-frequency LVDS clock or data streams to multiple subsystems. Its four channels carry up to 2 Gbps each, and the flow-through pinout keeps source and load edges on opposite sides of the package, minimizing internal device jitter and simplifying impedance-controlled layout. For clock distribution, the 1.0 ns typical propagation delay is tightly matched channel-to-channel, reducing skew between clock branches. Use common-mode filtering and a solid ground reference plane under the device; the trade-off versus a zero-delay buffer is the fixed 1.0 ns latency.
Recomendado
Imaging and Display Subsystem Links
Flat-panel display and machine-vision camera links commonly use Bus LVDS serializers whose outputs must traverse hinges, cables, or backplanes. The DS15BR400TSQ/NOPB inputs accept LVDS and Bus LVDS signaling, making it a transparent repeater between a serializer and a remote display deserializer while its pre-emphasis overcomes ISI jitter from the lossy cable segment. Operating from -40C to +85C, it suits both industrial displays and outdoor-facing camera chains. Keep the repeater close to the cable connector exit to maximize the regenerated signal margin at the far-end deserializer.
Recomendado
Industrial Automation Links
Factory automation equipment - servo drives, machine controllers, and vision sensors - relies on robust differential signaling across electrically noisy cabinets. The DS15BR400TSQ/NOPB's industrial -40C to +85C rating, single 3.3V supply, and 578 mW power allow integration into sealed control enclosures without forced airflow. Pre-emphasis restores margin on motor-cabinet ribbon and backplane runs where ISI jitter accumulates. Estimated: at 3.3V the 215 mA draw adds roughly 0.71 W worst-case if all channels are fully loaded, so size the local regulator margin accordingly and provide thermal vias under the exposed pad.
Recomendado
Data Communication Equipment
Line cards, switch fabrics, and storage controllers use the DS15BR400TSQ/NOPB to extend LVDS reach between ASICs and connectors where trace loss exceeds the receiver budget. Its four independent 2 Gbps channels can carry multiple serial links or aggregate lower-rate buses, and the flow-through pinout supports dense card routing between front-edge connectors and backplane. Because inputs accept Bus LVDS, it drops into legacy National Semiconductor chip-set architectures without level translation. Estimated: budget the 1.0 ns repeater delay in fabric timing closure; the added pre-emphasis boost reduces the need for higher-cost equalizing receivers.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para DS15BR400TSQ/NOPB — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | DS15BR401TSQ/NOPB | DS15BR400TSQ |
|---|---|---|---|
| Package | 32-WQFN (RTV) 5x5 mm | 32-WQFN (RTV) 5x5 mm - same | 32-WQFN (RTV) 5x5 mm - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments (legacy National Semiconductor) |
| Data Rate | 2 Gbps | 2 Gbps | 2 Gbps |
| Channels | 4 | 4 | 4 |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Supply Current | 215 mA | 215 mA | 215 mA |
| Pre-Emphasis | Fixed pre-emphasis | Pin-selectable pre-emphasis | Fixed pre-emphasis |
| Propagation Delay | 1.0 ns | 1.0 ns | 1.0 ns |
| Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C |
| Lifecycle Status | Active | Active | Obsolete (per DigiKey) |
Principais diferenciais
- Pre-emphasis restores eye margin on lossy channels (vs DS15BR400TSQ (bare, no pre-emphasis benefit difference))
- Flow-through pinout reduces jitter and layout complexity (vs Generic LVDS repeaters with mirrored pinout)
- Fixed pre-emphasis simplifies control vs DS15BR401 (vs DS15BR401TSQ/NOPB)
- Trade-off: higher power than simple repeaters (vs DS15BR401TSQ/NOPB)
Notas de projeto
Route each LVDS differential pair at 100 ohm differential impedance with tight intra-pair length matching (within 5 mils) and inter-pair decoupling of at least 3x the pair spacing. The flow-through pinout lets input pairs enter one side and output pairs exit the other - keep the two sides separated by a ground pour to avoid crosstalk between input and regenerated outputs. Place 0.1 uF ceramic decoupling capacitors within 2 mm of the VDD pins and a 10 uF bulk capacitor per device.
The DS15BR400/DS15BR401 consumes 578 mW typical from a single 3.3V supply. Estimated: with a 32-WQFN 5x5 mm exposed-pad package, dissipation concentrates in the die, so solder the exposed pad to a ground-plane copper pour with an array of thermal vias (5x5 grid recommended) to keep junction temperature low at +85C ambient. Avoid thermal-relief spokes on the exposed-pad vias; full connections improve heat flow.
Pre-emphasis is a fixed boost on the DS15BR400 - overdriving a short channel (<15 cm) can cause overshoot at the receiver. If your channel length varies across a design family, use the pin-selectable DS15BR401 on the same footprint. Also, do not leave unused differential inputs floating; terminate or tie per the datasheet to prevent spurious output switching. Note the bare DS15BR400TSQ is marked obsolete - qualify the /NOPB version in new designs.
At 2 Gbps, budget the 1.0 ns typical propagation delay in timing closure for pipelined links. Insert the repeater as close as practical to the lossy cable or backplane connector so the pre-emphasized signal traverses the lossy segment, and place any AC-coupling capacitors per TI application guidance with identical placement on both legs of a pair to minimize skew.
Informações de conformidade
The /NOPB suffix indicates RoHS-compliant, lead-free TI production. No AEC-Q100 qualified equivalent was identified (TI E2E forum request for AEC-qualified equivalent, May 2025). REACH, halogen-free and conflict-minerals status must be confirmed from TI environmental documentation.
