SN74AVC4T234 - 4-Bit Dual-Supply Level Translator | TI
料号： SN74AVC4T234 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.85 | $0.85 |
| 10 | $0.72 | $7.20 |
| 100 | $0.58 | $58.00 |
| 500 | $0.49 | $245.00 |
| 1,000 | $0.42 | $420.00 |
SN74AVC4T234 概述
A voltage level translator, also known as a level shifter, is a type of logic IC that allows digital signals to be transferred between circuits operating at different voltage levels. It is essential in mixed-voltage systems, such as interfacing a 1.8V microcontroller with a 3.3V peripheral. The SN74AVC4T234 belongs to the AVC family of advanced very-low-voltage CMOS logic, which is optimized for high-speed operation with minimal power consumption.
Key features of the SN74AVC4T234 include its dual-supply configuration, which provides independent power rails for each port, ensuring proper voltage translation without signal distortion. The device maintains excellent signal integrity across the entire VCC range, and its low static and dynamic power consumption extends battery life in portable devices. The noninverting architecture preserves signal polarity, simplifying system design.
Technically, the SN74AVC4T234 uses a configurable voltage translation scheme that automatically adjusts output drive strength based on the supply voltage. This ensures reliable operation even with varying supply levels. The device is available in a small package, making it ideal for space-constrained applications. Its propagation delay is minimal, supporting high-speed data transfer.
Typical applications include interfacing between different voltage domains in smartphones, tablets, and other portable electronics, as well as in industrial control systems where sensors and microcontrollers operate at different voltages. The device is also used in networking equipment and data communication systems.
When designing with the SN74AVC4T234, ensure that both VCCA and VCCB are powered and within the specified range. Proper decoupling capacitors should be placed near the supply pins to maintain stable operation. The device supports bidirectional level translation, but the direction is controlled by the DIR pin, which must be set correctly for the desired data flow.
直接替换替代料： SN74AVC4T234 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： SN74AVC4T234 （相同外形与封装尺寸） ——差异在于 Output Type, Direction Control, Package, Supply Voltage VCCA, Supply Voltage VCCB.
快速对比工具——选择替代料号进行并排对比：
SN74AVC4T245PWR
✅ 直接替换✓ 有现货
$0.38 / 个
查看数据手册 →SN74AVC4T245QWRGYRQ1
✅ 直接替换✓ 有现货
$0.31 / 个
查看数据手册 →SN74AVC4T774
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
SN74AVC4T245PWR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.38 / 个
查看数据手册 →SN74AVC4T245-Q1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
SN74AVC4T245PWR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.38 / 个
查看数据手册 →SN74AVC4T234 最大额定值与电气特性
| Number of Channels | 4 |
| Supply Voltage (VCCA) | 0.9 V to 3.6 V |
| Supply Voltage (VCCB) | 0.9 V to 3.6 V |
| 输出类型 | Noninverting |
| Direction Control | Yes (DIR pin) |
| 工作温度范围 | -40°C to 85°C |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| REACH Status | Compliant |
| AEC-Q100 Qualified | No |
| Lead-Free | Yes |
| 无卤 | Yes |
| Conflict Minerals | Compliant |
SN74AVC4T234 引脚配置
| 引脚 1 | DIR — Direction control input |
| 引脚 2 | A1 — A-port input/output |
| 引脚 3 | A2 — A-port input/output |
| 引脚 4 | A3 — A-port input/output |
| 引脚 5 | A4 — A-port input/output |
| 引脚 6 | GND — Ground |
| 引脚 7 | B4 — B-port input/output |
| 引脚 8 | B3 — B-port input/output |
| 引脚 9 | B2 — B-port input/output |
| 引脚 10 | B1 — B-port input/output |
| 引脚 11 | VCCB — B-port supply voltage |
| 引脚 12 | VCCA — A-port supply voltage |
典型应用
SN74AVC4T234 适用于 6 应用s: Portable Electronics, Industrial Control Systems, Networking Equipment, Medical Devices, IoT Devices, Automotive Electronics.
Portable Electronics
The SN74AVC4T234 is ideal for battery-powered portable devices like smartphones and tablets, where low power consumption is critical. Its 0.9V to 3.6V supply range allows interfacing between low-voltage processors and higher-voltage peripherals, extending battery life. The device's low static and dynamic power consumption ensures minimal drain, while excellent signal integrity maintains data reliability.
推荐
Industrial Control Systems
In industrial automation, sensors and actuators often operate at different voltage levels than the central controller. The SN74AVC4T234 provides reliable level translation between 3.3V logic and 5V or 1.8V devices, ensuring robust communication. Its wide supply range and low power consumption make it suitable for remote I/O modules and fieldbus interfaces, where power efficiency and signal integrity are paramount.
推荐
Networking Equipment
The SN74AVC4T234 is used in networking devices like routers and switches to interface between different voltage domains, such as 1.8V FPGA I/O and 3.3V PHY chips. Its high-speed operation and low propagation delay ensure minimal signal degradation, critical for high-throughput data links. The device's small package and low power consumption are advantageous in dense PCB designs.
推荐
Medical Devices
Medical monitoring equipment often uses low-voltage sensors and high-voltage displays, requiring safe and reliable level translation. The SN74AVC4T234 ensures accurate signal transfer between these domains, with low power consumption for battery-operated devices. Its compliance with RoHS and REACH makes it suitable for medical applications where environmental standards are strict.
推荐
IoT Devices
IoT devices often combine low-power microcontrollers with various sensors and radios operating at different voltages. The SN74AVC4T234 enables seamless communication between these components, ensuring reliable data acquisition and transmission. Its ultra-low power consumption is essential for battery-powered IoT nodes, extending operational life. The device's small footprint fits compact designs.
推荐
Automotive Electronics
In automotive systems, different modules operate at various voltage levels, such as 1.8V microcontrollers and 3.3V sensors. The SN74AVC4T234 provides robust level translation with excellent signal integrity, essential for reliable operation in harsh environments. Although not AEC-Q100 qualified, it can be used in non-safety-critical applications. For automotive-grade, consider the SN74AVC4T245-Q1.
推荐
推荐产品汇总
工程参考数据： SN74AVC4T234 ——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 | SN74AVC4T245PWR | SN74AVC4T245QWRGYRQ1 | SN74AVC4T774 |
|---|---|---|---|---|
| Package | TSSOP-16 | TSSOP-16 | VQFN-16 | TSSOP-16 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Channels | 4 | 4 | 4 | 4 |
| Supply Voltage Range | 0.9V to 3.6V | 0.9V to 3.6V | 0.9V to 3.6V | 0.9V to 3.6V |
| Direction Control | Yes (DIR pin) | Yes (DIR pin) | Yes (DIR pin) | Yes (DIR pin) |
| Output Enable | No | Yes | Yes | No |
| Automotive Grade | No | No | Yes (Q1) | No |
| RoHS Compliant | Yes | Yes | Yes | Yes |
关键差异点
- Ultra-low power consumption （对比 SN74AVC4T245PWR)
- Noninverting architecture （对比 SN74AVC4T774)
- Wide supply range （对比 SN74AVC4T245QWRGYRQ1)
设计说明
Ensure both VCCA and VCCB are powered and within the specified range (0.9V to 3.6V). Use 0.1uF decoupling capacitors close to each supply pin to minimize noise. The device consumes very low static power, but dynamic power increases with switching frequency, so consider the total power budget in high-speed applications.
Place the SN74AVC4T234 close to the voltage domain boundary to minimize trace lengths and reduce signal integrity issues. Use controlled impedance traces for high-speed signals. Ensure proper ground plane continuity under the device to reduce loop inductance.
Do not apply voltage to the A or B ports before the corresponding supply rail is powered, as this can cause latch-up or damage. Also, ensure the DIR pin is set correctly for the desired data direction; incorrect setting can cause bus contention. Refer to the datasheet for proper power-up sequencing.
合规信息
RoHS and REACH compliant per TI product page. Not AEC-Q100 qualified; use SN74AVC4T245-Q1 for automotive.
