TMUX7208 - 44V Latch-Up Immune 8:1 MUX | Texas Instruments
料号： TMUX7208 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.85 | $1,850.00 |
TMUX7208 概述
A multiplexer (MUX) is a device that selects one of several analog or digital input signals and forwards it to a single output line. The TMUX7208 is an analog multiplexer, specifically an 8:1 configuration, meaning it routes one of eight input channels to a common output based on the state of three address pins and an enable pin. This functionality is essential in data acquisition systems, test equipment, and industrial automation where multiple sensors or signals need to be sampled sequentially by a single ADC or measurement circuit.
Key features of the TMUX7208 include latch-up immunity, which prevents damage from overvoltage or ESD events, and 1.8V logic-compatible inputs, allowing direct interface with low-voltage microcontrollers without level shifters. The device supports high current up to 300mA (max), making it robust for various loads. The low on-resistance and charge injection ensure minimal signal distortion and glitches during switching.
The TMUX7208 uses a precision architecture with a break-before-make switching mechanism, preventing momentary shorting between channels. The device also features an enable pin that, when low, disconnects all channels, providing a high-impedance state. This is useful for power-down or isolation scenarios. The wide supply range and latch-up immunity make it ideal for industrial and automotive environments where voltage transients are common.
Typical applications include data acquisition systems, test and measurement equipment, industrial process control, and battery monitoring systems. The TMUX7208 can be used to multiplex multiple sensor inputs into a single ADC, reducing component count and cost. Its high-voltage capability allows direct connection to 24V industrial buses without additional level shifting.
When designing with the TMUX7208, ensure that the supply voltages are within the specified range and that the input signals do not exceed the supply rails. Proper decoupling capacitors on the supply pins are recommended to minimize noise. The address and enable pins should be driven with logic levels compatible with 1.8V to 5V, as the device is 1.8V logic compatible.
直接替换替代料： TMUX7208 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
TMUX7208PWR
✅ 直接替换📋 参考替代料（不在目录中）
TMUX7208M
✅ 直接替换📋 参考替代料（不在目录中）
TMUX7209PWR
⚡ 相同封装📋 参考替代料（不在目录中）
ADG708
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX4781
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TMUX7208 规格参数
| Configuration | 8:1 Single Channel |
| Number of Channels | 1 |
| On-Resistance (Typical) | 4 Ω |
| On-Resistance (Max) | 5.4 Ω |
| Charge Injection | 3 pC |
| Single Supply Voltage Range | 4.5 V to 44 V |
| Dual Supply Voltage Range | ±4.5 V to ±22 V |
| Asymmetric Supply Support | Yes (e.g., VDD=12V, VSS=-5V) |
| Maximum Continuous Current | 300 mA |
| Logic Compatibility | 1.8 V compatible |
| Latch-Up Immunity | Yes |
| 工作温度范围 | -40°C to +125°C |
| 封装 | 16-TSSOP (PW) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
TMUX7208 引脚配置
| 引脚 1 | S1 — Input channel 1 |
| 引脚 2 | S2 — Input channel 2 |
| 引脚 3 | S3 — Input channel 3 |
| 引脚 4 | S4 — Input channel 4 |
| 引脚 5 | S5 — Input channel 5 |
| 引脚 6 | S6 — Input channel 6 |
| 引脚 7 | S7 — Input channel 7 |
| 引脚 8 | S8 — Input channel 8 |
| 引脚 9 | GND — Ground |
| 引脚 10 | EN — Enable (active high) |
| 引脚 11 | A0 — Address bit 0 |
| 引脚 12 | A1 — Address bit 1 |
| 引脚 13 | A2 — Address bit 2 |
| 引脚 14 | D — Common output |
| 引脚 15 | VSS — Negative supply (or GND in single supply) |
| 引脚 16 | VDD — Positive supply |
典型应用
TMUX7208 适用于 6 应用s: Data Acquisition Systems, Test and Measurement Equipment, Industrial Process Control, Battery Monitoring Systems, Audio Signal Routing, Automotive Electronics.
Data Acquisition Systems
The TMUX7208 is ideal for data acquisition systems where multiple analog sensors need to be sampled by a single ADC. Its low on-resistance (4Ω) and low charge injection (3pC) ensure accurate signal transfer with minimal distortion. The wide supply range (up to 44V) allows direct connection to industrial sensors without level shifting. The 1.8V logic compatibility simplifies interface with modern microcontrollers. In a typical system, the TMUX7208 connects eight sensor outputs to one ADC input, reducing component count and cost. The break-before-make switching prevents channel crosstalk, ensuring reliable measurements.
推荐
Test and Measurement Equipment
In test and measurement equipment, the TMUX7208 routes multiple test points to a single measurement instrument. Its high voltage capability (up to 44V) allows direct switching of power rails and signals. The latch-up immunity ensures robustness against ESD and overvoltage events, which are common in test environments. The low charge injection minimizes glitches that could affect measurement accuracy. The device's 300mA current capability supports driving loads in automated test equipment. The 16-TSSOP package is compact, saving board space in dense test systems.
推荐
Industrial Process Control
The TMUX7208 is well-suited for industrial process control systems that monitor multiple sensors such as temperature, pressure, and flow. Its wide supply range (4.5V to 44V) accommodates 24V industrial buses directly. The operating temperature range of -40°C to +125°C ensures reliable operation in harsh environments. The latch-up immunity protects against voltage transients from inductive loads. The 1.8V logic compatibility allows direct connection to low-power microcontrollers, reducing power consumption. The low on-resistance ensures minimal signal loss over long cable runs.
推荐
Battery Monitoring Systems
In battery monitoring systems, the TMUX7208 multiplexes voltage and temperature sense lines from multiple battery cells to a single monitoring IC. Its high voltage rating (up to 44V) is essential for monitoring series-connected cells. The low charge injection prevents voltage spikes that could damage sensitive measurement circuits. The 1.8V logic compatibility allows direct interface with battery management ICs. The device's low on-resistance ensures accurate voltage measurements across the cell stack. The wide temperature range supports operation in automotive and industrial battery packs.
推荐
Audio Signal Routing
The TMUX7208 can be used in audio equipment to route multiple audio sources to a single output. Its low charge injection (3pC) minimizes audible clicks and pops during switching. The low on-resistance (4Ω) ensures minimal signal attenuation. The wide supply range allows operation from ±15V rails commonly used in audio circuits. The break-before-make switching prevents shorting between channels, which could cause distortion. The device's high current capability (300mA) can drive headphone loads directly in some applications.
推荐
Automotive Electronics
The TMUX7208 is suitable for automotive applications such as battery management, sensor multiplexing, and infotainment systems. Its wide supply range (up to 44V) handles automotive battery voltages (12V/24V). The operating temperature range of -40°C to +125°C meets automotive requirements. The latch-up immunity provides robustness against load-dump transients. The 1.8V logic compatibility allows direct connection to automotive microcontrollers. The device's low on-resistance ensures efficient signal routing in power-sensitive systems.
推荐
推荐产品汇总
工程参考数据： TMUX7208 ——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 | TMUX7208PWR | TMUX7208M | TMUX7209PWR | ADG708 | MAX4781 |
|---|---|---|---|---|---|---|
| Package | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP | 16-TSSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Maxim Integrated |
| Configuration | 8:1 Single | 8:1 Single | 8:1 Single | 4:1 Dual | 8:1 Single | 8:1 Single |
| On-Resistance (Typ) | 4 Ω | 4 Ω | 4 Ω | 4 Ω | 4.5 Ω | 1 Ω |
| Supply Voltage (Single) | 4.5V to 44V | 4.5V to 44V | 4.5V to 44V | 4.5V to 44V | 2.7V to 5.5V | 2.7V to 12V |
| Charge Injection | 3 pC | 3 pC | 3 pC | 3 pC | 5 pC | 5 pC |
| Latch-Up Immunity | Yes | Yes | Yes | Yes | No | No |
| Logic Compatibility | 1.8V | 1.8V | 1.8V | 1.8V | 2.7V | 2.7V |
关键差异点
- Latch-up immunity （对比 ADG708)
- Wide supply voltage range （对比 MAX4781)
- 1.8V logic compatibility （对比 ADG708)
设计说明
Ensure the supply voltages (VDD and VSS) are within the specified range (4.5V to 44V single, ±4.5V to ±22V dual). Use 0.1µF decoupling capacitors close to the VDD and VSS pins to filter high-frequency noise. For asymmetric supplies, ensure the total voltage difference does not exceed 44V.
Place the TMUX7208 close to the ADC or load to minimize trace length and parasitic capacitance. Use a solid ground plane under the device to reduce noise. For high-frequency signals, consider impedance-controlled traces and keep the address lines short to avoid crosstalk.
Do not exceed the absolute maximum ratings for input voltages. Ensure the address and enable pins are not left floating; tie them to known logic levels. When using dual supplies, ensure VSS is properly connected to the negative rail, not left unconnected. Verify the pinout against the datasheet before PCB layout.
合规信息
RoHS compliant per TI product page. Not AEC-Q100 qualified; for automotive, consider TMUX7208-Q1 if available.
