SN74LVC244APWR Low-Voltage Octal Tri-State Buffer Overview
The SN74LVC244APWR from Texas Instruments is a high-performance octal (8-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メーカー offers this essential logic component as part of its portfolio of multi-channel semiconductors, trusted for performance in space-constrained designs.
Technical Parameters of SN74LVC244APWR
| パラメータ | 価値 | 単位 |
|---|---|---|
| チャンネル数 | 8 | チャンネル |
| 電源電圧範囲 | 1.65～3.6 | V |
| 出力電流（最大、各チャンネル） | 32 | mA（シンク/ソース） |
| 伝搬遅延（標準） | 5.5 | ns（各チャンネル、3.3V、50pF負荷） |
| 静止電流（最大） | 10 | ??A |
| パッケージタイプ | TSSOP-20 (Thin Shrink Small Outline Package, 20-pin) | |
動作特性
| 特徴 | 仕様 | |
|---|---|---|
| 動作温度範囲 | -40度～85度 | |
| 入力電圧範囲 | 0～VCC | |
| イネーブル時間（標準） | 7 | ナノ秒 |
| ディセーブル時間（標準） | 6 | ナノ秒 |
| ESD保護 | 2kV（HBM）、250V（MM） |
代替ロジック・バッファを超える利点
The SN74LVC244APWR outperforms conventional solutions in multi-channel systems, starting with its integrated octal design. Unlike using eight single-channel tri-state buffers, it reduces component count by 87%, slashing PCB space and assembly costs??critical for industrial control boards and data center peripherals with dense signal paths. This integration also ensures matched performance across all eight channels, avoiding timing mismatches in coordinated systems. “We reduced our control board size by 30% using this single octal buffer instead of eight discrete components,” notes a senior engineer at a leading industrial automation firm.
ベストセラー商品
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%. This is far more reliable than basic buffers, which can cause signal collisions in multi-master setups common in factory automation.
Its 1.65V?C3.6V voltage range supports modern low-power standards (1.8V microcontrollers, 3.3V sensors) better than older logic families (e.g., 74HC), which require higher voltages. This versatility allows manufacturers to standardize on one component across product lines, simplifying inventory. At 10??A quiescent current, it also balances power efficiency with multi-channel functionality, outperforming discrete solutions by 30% in standby power draw.
注目商品
The TSSOP-20 package (6.4mm??10.1mm) offers superior space efficiency compared to larger packages (e.g., DIP-20), fitting into compact industrial PCBs where every millimeter matters. Its surface-mount design enables automated assembly, improving manufacturing consistency??critical for high-volume production.
Typical Applications of SN74LVC244APWR
The SN74LVC244APWR excels in multi-channel, low-power systems requiring bus isolation. Key use cases include:
お問い合わせ
- Industrial automation (PLCs and sensor network bus isolation for factory floors)
- Data centers (server motherboard peripheral interface buffering)
- Telecommunications (router and switch signal routing for high-density ports)
- Automotive infotainment (multi-device bus management for in-vehicle networks)
- IoT gateways (coordinating signals from multiple connected sensors in smart grids)
テキサス・インスツルメンツ?論理設計の専門知識
As a Texas Instruments product, the SN74LVC244APWR leverages TI??s 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 components like the SN74LVC244APWR for consistent performance in high-volume production.
よくある質問（FAQ）
What is an octal tri-state buffer, and how does it benefit multi-channel systems?
An octal tri-state buffer includes eight independent tri-state circuits in one package, enabling simultaneous isolation of eight signals. This eliminates the need for eight single-channel ICs, reducing PCB space by up to 70% in multi-channel systems (e.g., a factory sensor array with eight 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 common in factories.
How does the TSSOP-20 package enhance compact design in industrial equipment?
The TSSOP-20 package??s small footprint (6.4mm??10.1mm) fits in space-constrained industrial PCBs, where larger through-hole packages (e.g., DIP-20) are too bulky. Its thin profile (1.2mm) supports dense component placement, while surface-mount technology enables automated assembly??key for control modules with limited space and high-volume production requirements.
What makes the 1.65V?C3.6V voltage range suitable for modern low-power systems?
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.
How does ESD protection enhance reliability in industrial environments?
??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.