SN54LS05 - Military 6-ch Open-Collector Inverter | TI
MPN： SN54LS05 ✓ 啟用中SN54LS05 概覽
An inverter is a logic gate that outputs the logical complement of its input. The SN54LS05 specifically features open-collector outputs, meaning the output transistor's collector is left unconnected internally, requiring an external pull-up resistor to define the high-level output voltage. This allows the device to interface with different voltage domains and to implement wired-OR logic by connecting multiple outputs together. Open-collector outputs also enable driving loads such as relays, LEDs, and lamps directly, with appropriate current limiting.
Key features include six independent inverters, a wide operating temperature range of -55°C to 125°C, and compatibility with TTL logic levels. The open-collector outputs can sink up to 8 mA, and the device supports a supply voltage range of 4.5 V to 5.5 V. The military-grade qualification ensures reliability in defense and aerospace applications.
Technically, the SN54LS05 uses bipolar junction transistor (BJT) technology, providing fast switching speeds and robust output drive. The open-collector design allows for level shifting and bus communication, making it versatile for various logic interfacing tasks. The device is available in a 14-pin CDIP package, which offers excellent thermal and mechanical stability.
Typical applications include military electronics, industrial control systems, and any design requiring high-voltage or high-current logic interfacing. The SN54LS05 is often used to drive relays, lamps, and other loads, as well as to implement wired-OR logic in bus systems.
When designing with this device, ensure that pull-up resistors are properly sized to limit output current and to achieve the desired switching speed. The open-collector outputs require external pull-ups to VCC or another voltage rail, and the resistor value should be chosen based on the load capacitance and required rise time.
直接替換替代品，適用於 SN54LS05 — 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。
SN54S05
✅ 直接替換📋 參考替代品（不在目錄中）
SN74LS05
✅ 直接替換📋 參考替代品（不在目錄中）
SN74S05
✅ 直接替換📋 參考替代品（不在目錄中）
MC54LS05
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MC74LS05
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
SN54LS05 最大額定值與電氣特性
| Number of Channels | 6 |
| Supply Voltage Range | 4.5 V to 5.5 V |
| 輸出類型 | Open Collector |
| Logic Family | LS |
| 工作溫度範圍 | -55°C to 125°C |
| Package Type | 14-CDIP |
| 安裝類型 | Through Hole |
| Output Current (Sink) | 8 mA |
| Input Voltage (High) | 2 V (min) |
| Input Voltage (Low) | 0.8 V (max) |
| RoHS 狀態 | Compliant |
| Military Grade | Yes |
| 腳位數 | 14 |
| Technology | Bipolar |
SN54LS05 腳位配置
| 腳位 1 | 1A — Input of inverter 1 |
| 腳位 2 | 1Y — Output of inverter 1 (open-collector) |
| 腳位 3 | 2A — Input of inverter 2 |
| 腳位 4 | 2Y — Output of inverter 2 (open-collector) |
| 腳位 5 | 3A — Input of inverter 3 |
| 腳位 6 | 3Y — Output of inverter 3 (open-collector) |
| 腳位 7 | GND — Ground |
| 腳位 8 | 4Y — Output of inverter 4 (open-collector) |
| 腳位 9 | 4A — Input of inverter 4 |
| 腳位 10 | 5Y — Output of inverter 5 (open-collector) |
| 腳位 11 | 5A — Input of inverter 5 |
| 腳位 12 | 6Y — Output of inverter 6 (open-collector) |
| 腳位 13 | 6A — Input of inverter 6 |
| 腳位 14 | VCC — Positive supply voltage (4.5V to 5.5V) |
典型應用
SN54LS05 適用於 6 應用s: Military Electronics, Industrial Control Systems, Wired-OR Logic, Level Shifting, Relay and Lamp Driving, Avionics and Aerospace.
Military Electronics
The SN54LS05 is designed for military-grade applications requiring reliable operation over -55°C to 125°C. Its open-collector outputs allow interfacing with high-voltage loads and implementing wired-OR logic in avionics and defense systems. The device's bipolar technology ensures robust performance in harsh environments, and its 8 mA sink capability can drive relays and indicators directly.
推薦
Industrial Control Systems
In industrial control, the SN54LS05 is used for logic-level conversion and driving loads such as relays and lamps. Its open-collector outputs can be pulled up to different voltages, enabling level shifting between 5-V logic and 24-V industrial signals. The wide temperature range and military-grade reliability make it suitable for factory automation and process control.
推薦
Wired-OR Logic
The SN54LS05's open-collector outputs allow multiple outputs to be connected together to implement wired-OR logic. This is useful in bus systems where multiple devices need to share a common line. The device can sink current from the bus, and an external pull-up resistor sets the high level. This configuration is common in interrupt lines and status signals.
推薦
Level Shifting
The SN54LS05 can shift logic levels between different voltage domains. By connecting the pull-up resistor to a higher voltage rail, the open-collector output can produce a high-level voltage that is higher than the device's supply. This enables interfacing 5-V logic with 12-V or 24-V systems, making it useful in mixed-voltage designs.
推薦
Relay and Lamp Driving
The open-collector outputs of the SN54LS05 can directly drive relays, lamps, and LEDs when the current is within the 8 mA sink capability. For higher currents, an external transistor or a driver IC like the ULN2803 can be used. The device's wide temperature range makes it suitable for automotive and industrial lighting applications.
推薦
Avionics and Aerospace
The SN54LS05 is qualified for military and aerospace applications, where reliability and wide temperature operation are critical. It is used in flight control systems, navigation equipment, and communication interfaces. The 14-CDIP package provides robust mechanical integrity, and the bipolar technology ensures consistent performance under extreme conditions.
推薦
推薦產品摘要
工程參考資料，適用於 SN54LS05 — 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 | SN54S05 | SN74LS05 | SN74S05 | MC54LS05 | MC74LS05 |
|---|---|---|---|---|---|---|
| Package | 14-CDIP | 14-CDIP | 14-SOIC | 14-SOIC | 14-CDIP | 14-SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Motorola | Motorola |
| Number of Channels | 6 | 6 | 6 | 6 | 6 | 6 |
| Supply Voltage Range | 4.5V to 5.5V | 4.5V to 5.5V | 4.75V to 5.25V | 4.75V to 5.25V | 4.5V to 5.5V | 4.75V to 5.25V |
| Output Type | Open Collector | Open Collector | Open Collector | Open Collector | Open Collector | Open Collector |
| Operating Temperature Range | -55°C to 125°C | -55°C to 125°C | 0°C to 70°C | 0°C to 70°C | -55°C to 125°C | 0°C to 70°C |
| Output Current (Sink) | 8 mA | 20 mA | 8 mA | 20 mA | 8 mA | 8 mA |
主要差異化特點
- Military-grade temperature range (對比SN74LS05)
- Higher output sink current (對比SN54S05)
- Lower power consumption (對比SN54S05)
設計說明
Open-collector outputs require external pull-up resistors. Without them, the output cannot go high, and the logic level will be undefined. Choose pull-up resistor values based on the load capacitance and required rise time; typical values range from 1kΩ to 10kΩ.
For high-speed operation, keep pull-up resistors close to the device and minimize trace length to reduce parasitic capacitance. Use a ground plane to provide a low-impedance return path and reduce noise. Decouple the VCC pin with a 0.1µF ceramic capacitor placed as close as possible to the pin.
The SN54LS05 is specified for -55°C to 125°C. In high-temperature environments, ensure adequate airflow or heatsinking if driving multiple outputs at maximum current. The 14-CDIP package has a thermal resistance of approximately 100°C/W, so power dissipation should be limited to avoid exceeding the maximum junction temperature.
合規資訊
RoHS compliant per TI product page. Military-grade, not AEC-Q100 qualified.
