TMUX7208 - 44V Latch-Up Immune 8:1 MUX | Texas Instruments
部品番号: TMUX7208 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 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 概要
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.
ドロップイン代替品: TMUX7208 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
TMUX7208PWR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TMUX7208M
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TMUX7209PWR
⚡ 同一パッケージ📋 参考代替品（カタログ未掲載）
ADG708
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MAX4781
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
TMUX7208 仕様
| 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 |
| 動作温度範囲 | -40°C to +125°C |
| パッケージ | 16-TSSOP (PW) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
TMUX7208 ピン構成
| ピン 1 | S1 — Input channel 1 |
| ピン 2 | S2 — Input channel 2 |
| ピン 3 | S3 — Input channel 3 |
| ピン 4 | S4 — Input channel 4 |
| ピン 5 | S5 — Input channel 5 |
| ピン 6 | S6 — Input channel 6 |
| ピン 7 | S7 — Input channel 7 |
| ピン 8 | S8 — Input channel 8 |
| ピン 9 | GND — Ground |
| ピン 10 | EN — Enable (active high) |
| ピン 11 | A0 — Address bit 0 |
| ピン 12 | A1 — Address bit 1 |
| ピン 13 | A2 — Address bit 2 |
| ピン 14 | D — Common output |
| ピン 15 | VSS — Negative supply (or GND in single supply) |
| ピン 16 | VDD — Positive supply |
主な用途
TMUX7208 の用途: 6 件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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TMUX7208 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- Latch-up immunity （vs ADG708)
- Wide supply voltage range （vs MAX4781)
- 1.8V logic compatibility （vs ADG708)
設計ノート
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.
コンプライアンス情報
RoHS compliant per TI product page. Not AEC-Q100 qualified; for automotive, consider TMUX7208-Q1 if available.
