SN74AVC4T234 - 4-Bit Dual-Supply Level Translator | TI
MPN： SN74AVC4T234 ✓ 啟用中SN74AVC4T234 概覽
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.
直接替換替代品，適用於 SN74AVC4T234 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： SN74AVC4T234 （相同外形與佔位） — 差異在於 Output Type, Direction Control, Package, Supply Voltage VCCA, Supply Voltage VCCB.
SN74AVC4T245PWR
✅ 直接替換聯絡詢價
查看資料表 →SN74AVC4T245QWRGYRQ1
✅ 直接替換聯絡詢價
查看資料表 →SN74AVC4T774
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
SN74AVC4T245PWR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →SN74AVC4T245-Q1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
SN74AVC4T245PWR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →SN74AVC4T234 最大額定值與電氣特性
| Number of Channels | 4 |
| Supply Voltage (VCCA) | 0.9 V to 3.6 V |
| Supply Voltage (VCCB) | 0.9 V to 3.6 V |
| 輸出類型 | Noninverting |
| Direction Control | Yes (DIR pin) |
| 工作溫度範圍 | -40°C to 85°C |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| REACH Status | Compliant |
| AEC-Q100 Qualified | No |
| Lead-Free | Yes |
| 無鹵素 | Yes |
| Conflict Minerals | Compliant |
SN74AVC4T234 腳位配置
| 腳位 1 | DIR — Direction control input |
| 腳位 2 | A1 — A-port input/output |
| 腳位 3 | A2 — A-port input/output |
| 腳位 4 | A3 — A-port input/output |
| 腳位 5 | A4 — A-port input/output |
| 腳位 6 | GND — Ground |
| 腳位 7 | B4 — B-port input/output |
| 腳位 8 | B3 — B-port input/output |
| 腳位 9 | B2 — B-port input/output |
| 腳位 10 | B1 — B-port input/output |
| 腳位 11 | VCCB — B-port supply voltage |
| 腳位 12 | VCCA — A-port supply voltage |
典型應用
SN74AVC4T234 適用於 6 應用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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 SN74AVC4T234 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Ultra-low power consumption (對比SN74AVC4T245PWR)
- Noninverting architecture (對比SN74AVC4T774)
- Wide supply range (對比SN74AVC4T245QWRGYRQ1)
設計說明
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.
合規資訊
RoHS and REACH compliant per TI product page. Not AEC-Q100 qualified; use SN74AVC4T245-Q1 for automotive.
