Texas Instruments SN74LVC1G126DCKT Single Tri-State Buffer, SOT-23-5 ?C Low-Voltage Logic

SN74LVC1G126DCKT Low-Voltage Single Tri-State Buffer Overview

The SN74LVC1G126DCKT from Texas Instruments is a compact, single-channel tri-state buffer designed for 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 IoT sensors, wearables, and industrial interfaces where reliable single-path communication and space efficiency are critical. 集成电路制造商 offers this essential logic component as part of its portfolio of low-power semiconductors, trusted for performance in space-constrained designs.

Technical Parameters of SN74LVC1G126DCKT

参数	价值	单位
通道数	1	channel
电源电压范围	1.65 to 3.6	V
Output Current (Max)	32	mA (sink/source)
Propagation Delay (Typ)	5.5	ns (at 3.3V, 50pF load)
Quiescent Current (Max)	1	??A
包装类型	SOT-23-5 (Small Outline Transistor, 5-pin)
工作温度范围	-40至+85	??C

运行特性

特征	规格
输入电压范围	0 至 VCC
Enable Time (Typ)	7	ns
Disable Time (Typ)	6	ns
ESD 保护	2千伏（HBM），250伏（MM）
逻辑家族	LVC（低电压 CMOS）

Advantages Over Alternative Logic Buffers

The SN74LVC1G126DCKT outperforms conventional solutions in single-channel systems, starting with its tri-state design. Unlike basic buffers, its high-impedance mode prevents bus contention in shared architectures (e.g., I2C buses with multiple sensors), reducing data errors by up to 35%. “We eliminated signal collisions in our smart light sensor network by using this tri-state buffer,” notes a senior engineer at a leading IoT module manufacturer.

Compared to multi-channel buffers, its single-channel focus avoids unnecessary complexity, saving 40% PCB space in applications requiring only one isolated signal??critical for ultra-compact devices like wireless earbuds or medical glucose monitors. The SOT-23-5 package (2.9mm??1.6mm) is 60% smaller than SOIC-8 alternatives, fitting into tight enclosures.

Its 1.65V?C3.6V voltage range supports modern low-power standards (1.8V microcontrollers, 3.3V sensors) better than fixed-voltage buffers, eliminating the need for multiple components in mixed-voltage designs. This versatility simplifies inventory for manufacturers of consumer electronics and industrial sensors.

With 32mA output current, it drives signals over longer traces (up to 20cm) without degradation??outperforming low-current buffers (??10mA) that require signal repeaters. Combined with 1??A quiescent current, it extends battery life in portable devices by 15?C20% compared to higher-power alternatives.

Typical Applications of SN74LVC1G126DCKT

The SN74LVC1G126DCKT excels in single-channel, low-power systems requiring bus isolation. Key use cases include:

• IoT sensor nodes (isolating individual environmental or motion sensors on shared buses)
• Wearable electronics (smartwatch biometric sensor interfaces with microcontrollers)
• Industrial automation (single-signal buffering in small-scale sensor arrays)
• Consumer electronics (smartphone accessory ports with isolated data lines)
• Medical devices (portable monitors with single sensor inputs requiring noise-free communication)

Texas Instruments?? Expertise in Low-Voltage Logic

As a Texas Instruments product, the SN74LVC1G126DCKT leverages TI??s decades of innovation in low-voltage logic design. The LVC series is engineered for optimal balance of isolation, speed, and reliability??critical for modern electronics. Each unit undergoes rigorous testing to withstand -40??C to +85??C temperatures and voltage fluctuations, ensuring performance in harsh environments. This commitment has made TI a trusted partner for brands like Bosch and Apple, who rely on components like the SN74LVC1G126DCKT for consistent performance in high-volume production.

常见问题（FAQ）

What is a single-channel tri-state buffer, and how does it work?

A single-channel tri-state buffer is a circuit that amplifies a digital signal and can enter a high-impedance state (disconnected) when disabled. This allows one signal to share a bus with others without conflict??only active buffers drive the bus, preventing data corruption. It??s ideal for isolating individual sensors or peripherals in multi-device systems like IoT networks.

Why is 32mA output current important for signal integrity?

32mA output current allows the buffer to drive signals over longer PCB traces (up to 20cm) or multiple loads without voltage drop??critical in systems where components are spread out, such as industrial sensors or consumer electronics. This prevents signal degradation that could cause data errors, unlike lower-current buffers that may require additional drivers or repeaters.

How does the SOT-23-5 package benefit ultra-compact designs?

The SOT-23-5 package??s tiny footprint (2.9mm??1.6mm) fits in ultra-slim devices where space is limited by batteries, displays, or other components??such as wireless earbuds or medical wearables. Its surface-mount design enables automated assembly, improving manufacturing efficiency, while its low profile (1.1mm) supports slim enclosures??key for consumer electronics where aesthetics drive user preference.

What makes the 1.65V?C3.6V voltage range suitable for mixed-voltage systems?

This range covers common low-voltage standards: 1.8V (microcontrollers), 2.5V (DSPs), and 3.3V (sensors). Unlike fixed-voltage buffers, it works across these standards, eliminating the need for multiple components in mixed-voltage designs??e.g., a 1.8V MCU communicating with a 3.3V sensor. This simplifies engineering and reduces costs for manufacturers.

ESD 保护如何提高现场应用的可靠性？

??2kV HBM (Human Body Model) protection guards against static discharge during handling, assembly, or use??common in consumer and industrial settings. Without this, static could damage the buffer, causing intermittent failures (e.g., a sensor node failing to transmit data). This protection reduces warranty claims, as confirmed by field data from device manufacturers using the component.