仕様
| 属性 | 値 |
| Supplier | Rochester Electronics, LLC,Texas Instruments |
| Package / Case | Tube,Tube |
| Part Status | Obsolete |
| Type | 555 Type, Timer/Oscillator (Dual) |
| Voltage - Supply | 4.5V ~ 16V |
| Supply Current | 10 mA |
| Operating Temperature | 0°C ~ 70°C |
| Supplier Device Package | 14-SOIC |
概要
Description
The LM556CM/NOPB is a precision timer device that integrates two independent 555 timer circuits into a single 14-pin package. This dual timer IC is designed for use in a wide range of applications, including time delays, pulse generation, and oscillator functions. The LM556CM/NOPB operates within a voltage range of 4.5V to 16V, making it versatile for both low and high voltage applications. Each timer within the IC can be configured separately for monostable or astable operation, allowing for diverse functionalities.
The LM556CM/NOPB features high output current capability, low power consumption, and a temperature range from 0°C to 70°C, ensuring reliable performance in various environments. Additionally, it offers excellent performance with low timing variation and high frequency stability. The "NOPB" in the part number indicates that the device is RoHS compliant, reflecting its manufacturing with lead-free and environmentally friendly materials. This timer IC is commonly utilized in timing circuits, LED flashers, pulse-width modulation (PWM), and frequency division circuits, among other applications.
The LM556CM/NOPB features high output current capability, low power consumption, and a temperature range from 0°C to 70°C, ensuring reliable performance in various environments. Additionally, it offers excellent performance with low timing variation and high frequency stability. The "NOPB" in the part number indicates that the device is RoHS compliant, reflecting its manufacturing with lead-free and environmentally friendly materials. This timer IC is commonly utilized in timing circuits, LED flashers, pulse-width modulation (PWM), and frequency division circuits, among other applications.
Equivalent
The LM556CM/NOPB is a dual timer IC equivalent to two LM555 timers in a single package. Equivalent products include the NE556, SA556, and TLC556, which offer similar functionality and are pin-compatible. These ICs are commonly used for applications requiring precision timing and oscillation. While specific electrical characteristics may vary slightly, they generally serve as suitable substitutes for each other in most applications. Always verify datasheet specifications for compatibility in your particular design.
Features
The LM556CM/NOPB is a dual-timer integrated circuit that combines two independent 555 timers in a single package, making it suitable for precision timing applications. Here are some key features:
1. Dual Timer: It integrates two separate 555 timers, allowing for independent operation or cascading for more complex timing functions.
2. Wide Supply Voltage Range: Operates from 4.5V to 16V, providing flexibility for various applications.
3. Adjustable Duty Cycle: Duty cycle can be set using external resistors and capacitors, offering custom timing configurations.
4. Low Power Consumption: Efficient power usage with a typical supply current of approximately 6mA.
5. Moderate Frequency Range: Capable of handling frequencies up to 500kHz, suitable for both audio and sub-audio frequencies.
6. Temperature Stability: Offers consistent performance across a wide temperature range, typically between -40°C and +85°C.
7. Output Characteristics: Provides both sink and source current capabilities, useful for driving various loads.
8. Package Type: Available in an SOIC-14 package, aiding in compact circuit designs.
These features make the LM556CM/NOPB versatile for applications like oscillators, pulse generation, and time-delay circuits.
1. Dual Timer: It integrates two separate 555 timers, allowing for independent operation or cascading for more complex timing functions.
2. Wide Supply Voltage Range: Operates from 4.5V to 16V, providing flexibility for various applications.
3. Adjustable Duty Cycle: Duty cycle can be set using external resistors and capacitors, offering custom timing configurations.
4. Low Power Consumption: Efficient power usage with a typical supply current of approximately 6mA.
5. Moderate Frequency Range: Capable of handling frequencies up to 500kHz, suitable for both audio and sub-audio frequencies.
6. Temperature Stability: Offers consistent performance across a wide temperature range, typically between -40°C and +85°C.
7. Output Characteristics: Provides both sink and source current capabilities, useful for driving various loads.
8. Package Type: Available in an SOIC-14 package, aiding in compact circuit designs.
These features make the LM556CM/NOPB versatile for applications like oscillators, pulse generation, and time-delay circuits.
Pinout
The LM556CM/NOPB is a dual-timer IC, which is essentially two 555 timers in a single package. The LM556 comes in a 14-pin dual in-line package (DIP). Here is a brief description of its pin functions:
1. Ground (Pin 7): Common ground for both timers.
2. Trigger A (Pin 6): Starts the timing interval for timer A when it goes below 1/3 VCC.
3. Output A (Pin 5): Outputs the waveform from timer A.
4. Reset A (Pin 4): Resets the timing interval for timer A if pulled low.
5. Control Voltage A (Pin 3): Allows control of the threshold voltage for timer A; often left unconnected.
6. Threshold A (Pin 2): Ends the timing interval for timer A when it exceeds 2/3 VCC.
7. Discharge A (Pin 1): Discharges the timing capacitor for timer A.
8. VCC (Pin 14): Power supply voltage for the entire IC.
9. Trigger B (Pin 8): Similar function as Pin 6 but for timer B.
10. Output B (Pin 9): Similar function as Pin 5 but for timer B.
11. Reset B (Pin 10): Similar function as Pin 4 but for timer B.
12. Control Voltage B (Pin 11): Similar function as Pin 3 but for timer B.
13. Threshold B (Pin 12): Similar function as Pin 2 but for timer B.
14. Discharge B (Pin 13): Similar function as Pin 1 but for timer B.
The LM556 is widely used for applications requiring dual delay timers, oscillators, or flip-flop circuits.
1. Ground (Pin 7): Common ground for both timers.
2. Trigger A (Pin 6): Starts the timing interval for timer A when it goes below 1/3 VCC.
3. Output A (Pin 5): Outputs the waveform from timer A.
4. Reset A (Pin 4): Resets the timing interval for timer A if pulled low.
5. Control Voltage A (Pin 3): Allows control of the threshold voltage for timer A; often left unconnected.
6. Threshold A (Pin 2): Ends the timing interval for timer A when it exceeds 2/3 VCC.
7. Discharge A (Pin 1): Discharges the timing capacitor for timer A.
8. VCC (Pin 14): Power supply voltage for the entire IC.
9. Trigger B (Pin 8): Similar function as Pin 6 but for timer B.
10. Output B (Pin 9): Similar function as Pin 5 but for timer B.
11. Reset B (Pin 10): Similar function as Pin 4 but for timer B.
12. Control Voltage B (Pin 11): Similar function as Pin 3 but for timer B.
13. Threshold B (Pin 12): Similar function as Pin 2 but for timer B.
14. Discharge B (Pin 13): Similar function as Pin 1 but for timer B.
The LM556 is widely used for applications requiring dual delay timers, oscillators, or flip-flop circuits.
Manufacturer
The LM556CM/NOPB is manufactured by Texas Instruments. Texas Instruments, often abbreviated as TI, is an American technology company that designs and manufactures semiconductors and various integrated circuits. It is one of the top semiconductor companies globally and is known for its innovative solutions in analog and embedded processing. TI's products are used in a wide range of electronic applications, including industrial, automotive, personal electronics, and communications equipment. The company is headquartered in Dallas, Texas, and has a strong focus on research and development to drive technological advancements.
Application
The LM556CM/NOPB is a dual-timer IC used in a variety of applications. It is suitable for precision timing, pulse generation, and time delay generation. Specific application areas include:
1. Monostable Multivibrators: Creating precise time delays or single pulses.
2. Astable Multivibrators: Generating continuous pulse trains for oscillators.
3. Pulse Width Modulation (PWM): Used in controlling motor speeds and brightness of LEDs.
4. Frequency Division: Dividing frequencies in various circuits.
5. Sequential Timing: Coordinating the timing in sequential circuits.
6. Tone Generation: Used in tone generator circuits in communication systems.
These capabilities make it ideal for use in consumer electronics, industrial controls, and communication devices.
1. Monostable Multivibrators: Creating precise time delays or single pulses.
2. Astable Multivibrators: Generating continuous pulse trains for oscillators.
3. Pulse Width Modulation (PWM): Used in controlling motor speeds and brightness of LEDs.
4. Frequency Division: Dividing frequencies in various circuits.
5. Sequential Timing: Coordinating the timing in sequential circuits.
6. Tone Generation: Used in tone generator circuits in communication systems.
These capabilities make it ideal for use in consumer electronics, industrial controls, and communication devices.
Package
The LM556CM/NOPB is a dual timer IC packaged in a 14-pin SOIC (Small Outline Integrated Circuit) package. This surface-mount package is used in various timing applications, combining two 555 timer circuits in a single chip.
