SN74LVC125APWR Low-Voltage Quad Tri-State Buffer Overview
The SN74LVC125APWR from Texas Instruments is a high-performance quad (4-channel) tri-state buffer designed to isolate and amplify digital signals in low-voltage electronic systems. Its tri-state outputs??high, low, or high-impedance??enable safe disconnection from shared buses, preventing signal conflicts in multi-device setups. This makes it ideal for industrial automation, data centers, and telecommunications equipment where reliable multi-channel communication is critical. IC 製造商 提供這種重要的邏輯元件，作為其多通道半導體產品組合的一部分，在空間有限的設計中具有值得信賴的性能。
Technical Parameters of SN74LVC125APWR
| 參數 | 價值 | 單位 |
|---|---|---|
| 頻道數 | 4 | 頻道 |
| 供應電壓範圍 | 1.65 至 3.6 | V |
| 輸出電流（最大值，每通道） | 32 | mA (沉/源) |
| 傳輸延遲（典型值） | 5.5 | ns (每通道、3.3V、50pF 負載) |
| 靜態電流（最大值） | 10 | ??A |
| 包裝類型 | TSSOP-14（薄型收縮小外形封裝，14 引腳） | |
操作特性
| 特性 | 規格 | |
|---|---|---|
| 操作溫度範圍 | -40°C 至 +85°C | |
| 輸入電壓範圍 | 0 至 VCC | |
| 啟用時間 (Typ) | 7 | ns |
| 停用時間 (Typ) | 6 | ns |
| ESD 保護 | 2kV (HBM)、250V (MM) |
Advantages Over Alternative Logic Buffers
The SN74LVC125APWR outperforms conventional solutions in multi-channel systems, starting with its integrated quad design. Unlike using four single-channel tri-state buffers, it reduces component count by 75%, slashing PCB space and assembly costs??critical for industrial control boards and data center peripherals with multiple signal paths. This integration also ensures matched performance across channels, avoiding timing mismatches in coordinated systems.
暢銷產品
Compared to non-tri-state alternatives, its high-impedance mode prevents bus contention in shared architectures (e.g., SPI or GPIO buses with multiple sensors), reducing data errors by up to 50%??a key benefit noted by engineers in factory automation. This is far more reliable than basic buffers, which can cause signal collisions in multi-master setups.
其 1.65V?C3.6V 電壓範圍比需要較高電壓的舊式邏輯系列 (例如 74HC)，更能支援現代低功耗標準 (1.8V 微控制器、3.3V 感測器)。這種多功能性可讓製造商在各產品系列中統一使用一種元件，從而簡化庫存。它的靜態電流為 10??A，在功耗效率與多通道功能之間取得平衡，待機功耗比分立式解決方案高出 30%。
精選產品
The TSSOP-14 package (4.4mm??6.5mm) offers superior space efficiency compared to larger packages (e.g., DIP-14), fitting into compact industrial PCBs where every millimeter matters. “We reduced our control module size by 25% using this quad buffer,” reports a senior engineer at a leading industrial automation firm.
Typical Applications of SN74LVC125APWR
The SN74LVC125APWR excels in multi-channel, low-power systems requiring bus isolation. Key use cases include:
聯絡我們
- Industrial automation (PLCs and sensor network bus isolation)
- Data centers (server peripheral interface buffering)
- Telecommunications (router and switch signal routing)
- Automotive infotainment (multi-device bus management)
- IoT gateways (coordinating signals from multiple connected sensors)
德州儀器？邏輯設計的專業知識
As a Texas Instruments product, the SN74LVC125APWR leverages decades of innovation in low-voltage logic. TI??s LVC series is renowned for balancing isolation, speed, and reliability??critical for industrial and telecommunications environments. Each unit undergoes rigorous testing to withstand -40??C to +85??C temperatures and voltage fluctuations, ensuring performance in harsh conditions. This commitment has made TI a trusted partner for brands like Siemens and Cisco, who rely on the SN74LVC125APWR for consistent performance in high-volume production.
常見問題 (FAQ)
What is a quad tri-state buffer, and how does it benefit multi-channel systems?
A quad tri-state buffer includes four independent tri-state circuits in one package, enabling simultaneous isolation of four signals. This eliminates the need for four single-channel ICs, reducing PCB space by up to 60% in multi-channel systems (e.g., a factory sensor array with four data lines). It also ensures matched propagation delays across channels, preventing timing skew in coordinated applications like industrial control.
Why is 32mA output current per channel important for industrial systems?
32mA output current allows each channel to drive signals over long PCB traces (up to 30cm) or multiple loads without degradation??critical in industrial setups where sensors and controllers are spread across machinery. This prevents voltage drops that could corrupt data, unlike lower-current buffers that may suffer from signal loss in extended layouts.
How does the TSSOP-14 package enhance compact design in industrial equipment?
The TSSOP-14 package??s small footprint (4.4mm??6.5mm) fits in space-constrained industrial PCBs, where larger through-hole packages (e.g., DIP-14) are too bulky. Its surface-mount design enables automated assembly, improving manufacturing efficiency, while its thin profile (1.2mm) supports dense component placement??key for control modules with limited height.
是什麼讓 1.65V?C3.6V 電壓範圍適用於現代的低功耗系統？
This range covers the most common low-voltage standards in industrial and IoT electronics: 1.8V (microcontrollers), 2.5V (FPGAs), and 3.3V (sensors). Unlike fixed-voltage buffers, it works across these standards, eliminating the need for multiple components in mixed-voltage designs??simplifying engineering and reducing costs for manufacturers transitioning to energy-efficient systems.
ESD 保護如何提升工業環境中的可靠性？
??2kV HBM (Human Body Model) protection guards against static discharge during installation, maintenance, or operation??common in factory settings. Without this, static could damage the buffer, causing intermittent failures (e.g., a sensor node failing to communicate with a PLC). This protection reduces unplanned downtime, as confirmed by reliability data from industrial equipment manufacturers.