DS10BR254TSQ/NOPB - 1.5Gbps 1:4 LVDS Repeater | TI
料号： DS10BR254TSQ/NOPB ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.26 | $12.26 |
| 10 | $11.04 | $110.40 |
| 100 | $9.81 | $981.00 |
| 500 | $8.8 | $4,400.00 |
| 1,000 | $7.85 | $7,850.00 |
DS10BR254TSQ/NOPB 概述
An LVDS (Low-Voltage Differential Signaling) repeater, also called a buffer or fanout buffer, is an interface IC that regenerates high-speed differential signals to restore signal integrity over lossy media. In the signal-chain hierarchy it sits between a driver (SoC, FPGA, ASIC) and multiple receivers, extending reach across FR-4 backplanes and balanced-impedance cables while isolating loads that would otherwise degrade edge rates.
Key features include a 1.5 Gbps maximum data rate per LVDS channel, a 2-input multiplexer with an external select pin that supports redundant-path or source-switching architectures, four identical fanout outputs that regenerate each input pair with full LVDS swing, and a loss-of-signal (LOS) detection circuit. Fully differential signal paths deliver exceptional noise immunity, while the compact WQFN-40 package with thermal pad enables dense backplane card designs.
Architecturally, the device contains two differential input pairs, a low-skew mux, and four parallel low-jitter output drivers. Propagation delay of 440 ps and matched internal channel lengths keep output-to-output skew tight for clock and data distribution. The 1.7 pF input capacitance minimizes loading on the source, and the 3.0 V nominal supply (3.0 V to 3.6 V range) suits standard 3.3 V rails.
Typical applications include FR-4 backplane clock and data distribution, redundant bus multiplexing in telecom and networking line cards, high-speed signal fanout from FPGAs or ASICs in test and measurement instrumentation, and long-reach LVDS links over balanced cables.
Design consideration: maintain 100-ohm controlled-differential impedance on all LVDS traces, keep the mux select pin stable during operation, and leverage the LOS output for fault reporting in redundant architectures. The exposed pad must be soldered to a grounded copper pour for thermal and return-path performance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： DS10BR254TSQ/NOPB ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
DS10BR254TSQX/NOPB
✅ 直接替换📋 参考替代料（不在目录中）
DS10BR254TSQ
✅ 直接替换📋 参考替代料（不在目录中）
DS25BR254TSQ/NOPB
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
DS10BR254TSQ/NOPB 规格参数
| 功能 | 1:4 LVDS Repeater with 2:1 input MUX |
| Maximum Data Rate | 1.5 Gbps |
| 电源电压 | 3 V |
| 电源电流 | 135 mA |
| Propagation Delay | 440 ps |
| 输入电容 | 1.7 pF |
| 接口类型 | LVDS |
| 通道数 | 1 x 2:4 (multiplexed input, 4 outputs) |
| Loss of Signal Detection | Yes (LOS output) |
| Input Select | External select pin (2 input channels) |
| 工作温度 | -40C to +85C |
| 封装 | 40-WQFN (RTA), 6x6 mm, exposed pad |
| 安装类型 | Surface Mount |
| Pb-Free | Yes (/NOPB suffix) |
| RoHS 状态 | Compliant |
DS10BR254TSQ/NOPB 40-wqfn (rta), 6x6 mm, exposed pad 引脚配置指南
DS10BR254TSQ/NOPB（40-wqfn (rta), 6x6 mm, exposed pad 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： DS10BR254TSQ/NOPB.
请参阅 数据手册 以查看完整引脚配置。
典型应用
DS10BR254TSQ/NOPB 适用于 6 应用s: Backplane Signal Distribution, Redundant Bus Multiplexing, High-Speed FPGA/ASIC Fanout, Test and Measurement Instrumentation, Long-Reach LVDS Links over Balanced Cable, Industrial Control Backplanes.
Backplane Signal Distribution
The DS10BR254TSQ/NOPB is explicitly optimized for high-speed signal routing over FR-4 printed circuit board backplanes. Its fully differential LVDS signal paths regenerate edges degraded by backplane trace loss, delivering 1.5 Gbps data with a 440 ps propagation delay and tight output-to-output matching across the four fanout channels. In shelf-card architectures, a single line card can distribute a clock or data stream to four downstream loads without overloading the source driver, since the 1.7 pF input capacitance minimizes loading on the originating transmitter. Placing the repeater mid-backplane restores signal swing to full LVDS levels, extending effective reach beyond what the source alone could drive. The exposed-pad WQFN-40 package provides the thermal path needed for continuous operation at the 135 mA supply current in convection-cooled card slots.
推荐
Redundant Bus Multiplexing
The DS10BR254TSQ/NOPB's 2:1 multiplexed input stage makes it a natural fit for redundant-path architectures in telecom and networking equipment. Two independent LVDS sources - a primary and a backup - connect to the two input channels, and an external select pin determines which source drives the four fanout outputs. The loss-of-signal (LOS) circuit monitors the active input and reports signal absence, giving system control logic a hardware-level fault indicator to trigger failover. Because the mux sits ahead of identical, fully differential repeater stages, switchover preserves consistent output amplitude and edge rates across both paths. At 1.5 Gbps and 135 mA supply current, the device supports always-on protection switching without thermal concerns, and deterministic 440 ps delay simplifies timing closure across the primary and standby routes.
推荐
High-Speed FPGA/ASIC Fanout
When an FPGA or ASIC must drive four LVDS loads - multiple receivers, serializers, or clock inputs - direct connection degrades edge rates through fanout stub loading. The DS10BR254TSQ/NOPB buffers the single source pair and regenerates four clean output pairs at full LVDS swing, isolating each load. The 1.7 pF input capacitance keeps the driver's load light, while the 440 ps propagation delay is common to all four outputs, preserving skew relationships. This suits clock-tree distribution to multiple data converters, backplane interfaces, and inter-card links at up to 1.5 Gbps. Designers should maintain 100-ohm differential routing at the outputs and locate the repeater close to the FPGA bank to minimize the lossy segment. The 3.3 V rail compatibility simplifies integration with standard FPGA bank supplies.
推荐
Test and Measurement Instrumentation
Instrumentation systems frequently distribute a master clock or trigger signal to multiple acquisition modules, and the DS10BR254TSQ/NOPB performs this fanout with fully differential, low-skew signal paths. The 1.5 Gbps capability covers common LVDS trigger and data buses, while matched internal delays keep the 440 ps propagation delay consistent across all four outputs, preserving alignment between measurement channels. The LOS output gives instrument firmware immediate notification of a broken or disconnected trigger source, supporting self-test and error reporting. In modular instruments, the 6x6 mm WQFN-40 package fits dense module front ends, and the -40C to +85C operating range covers bench and field environments. The mux input additionally allows selecting between internal and external trigger sources on the same footprint.
推荐
Long-Reach LVDS Links over Balanced Cable
TI designed the DS10BR254 specifically for signal distribution over balanced cables as well as backplanes. Cable attenuation rolls off LVDS edges at high data rates, so placing a DS10BR254TSQ/NOPB repeater at the cable entry point regenerates full-swing differential signals before they reach the receiver side. The 1.5 Gbps rating supports mainstream cable-linked subsystems such as camera-to-processor and rack-to-rack links. Because both inputs and outputs are fully differential, common-mode noise picked up along the cable is rejected by the input stage, and the regenerated output starts each cable or trace segment with clean edges. The LOS output detects a disconnected or dead far end, useful in systems requiring link-status reporting. The 1.7 pF input capacitance also lightens the load on the far-end transmitter.
推荐
Industrial Control Backplanes
Industrial automation systems use LVDS distribution across chassis backplanes connecting drives, controllers, and I/O modules, where the DS10BR254TSQ/NOPB regenerates high-speed differential signals that would otherwise degrade across multi-slot FR-4 runs. The -40C to +85C operating range covers factory-floor temperature extremes, and the fully differential architecture provides the noise immunity required near motor drives and switching power stages. The mux input supports selecting between a controller's primary and backup communication channels, while the LOS output supports diagnostic reporting in condition-monitoring systems. At 135 mA from a standard 3.3 V industrial rail, power budgeting is straightforward, and the exposed-pad package maintains reliable thermal performance in passively cooled enclosures without additional heatsinking.
推荐
推荐产品汇总
工程参考数据： DS10BR254TSQ/NOPB ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | DS10BR254TSQX/NOPB | DS10BR254TSQ | DS25BR254TSQ/NOPB |
|---|---|---|---|---|
| Package | 40-WQFN (RTA) 6x6 mm | 40-WQFN (RTA) 6x6 mm - same | 40-WQFN (RTA) 6x6 mm - same | 40-WQFN (RTA) 6x6 mm - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments (National Semiconductor origin, via Rochester Electronics) | Texas Instruments |
| Max Data Rate | 1.5 Gbps | 1.5 Gbps | 1.5 Gbps | 2.5 Gbps |
| Architecture | 1:4 repeater with 2:1 input MUX | 1:4 repeater with 2:1 input MUX | 1:4 repeater with 2:1 input MUX | 1:4 repeater with 2:1 input MUX |
| Pb-Free / NOPB | Yes (/NOPB) | Yes (/NOPB) | No (legacy Pb-bearing flow) | Yes (/NOPB) |
| LOS Detection | Yes | Yes | Yes | Yes |
关键差异点
- Native 2:1 mux input for redundant-source selection （对比 DS25BR254TSQ/NOPB)
- Pb-free /NOPB flow with active TI lifecycle support （对比 DS10BR254TSQ (Rochester))
- Loss-of-signal (LOS) detection output （对比 DS10CP154ATSQ/NOPB)
设计说明
Route every LVDS pair as a 100-ohm controlled-differential-impedance trace with matched intra-pair lengths; at 1.5 Gbps even 5 mm of mismatch produces visible skew. Avoid stubs at the four fanout outputs - use daisy-chain or point-to-point topologies. Place the DS10BR254 close to the source driver so the lossy segment sits on the regenerated output side, where full-swing edges give the most margin.
The exposed pad of the WQFN-40 (RTA) package must be soldered to a grounded copper pour with a thermal via array. Beyond heat dissipation for the ~0.45 W dissipation (3.3 V x 135 mA, estimated), the pad provides the low-inductance return path that the fully differential signal paths depend on. Decouple each supply pin with 0.1 uF ceramic capacitors placed within 2 mm of the pin.
Keep the input-select pin stable and glitch-free during operation - toggling the mux mid-bit causes output runt pulses. The LOS output reports absence of input signal; treat it as a status output, not a protection mechanism, and never drive it directly into logic without level verification. When substituting the Rochester-sourced DS10BR254TSQ (non-NOPB), remember it is a Pb-bearing flow - not permitted in new RoHS designs.
合规信息
The /NOPB suffix denotes TI Pb-free (no-Pb) manufacturing. RoHS compliance implied by /NOPB designation; REACH, halogen-free, and conflict-minerals status not stated in provided data.
