Overview
The LMC555CMM/NOPB, produced by Texas Instruments, is a CMOS version of the industry-standard 555 series general-purpose timers. This device is designed to offer low power consumption, high accuracy, and a compact package. It is available in various packages, including SOIC, VSSOP, PDIP, and the industry's smallest 8-bump DSBGA package. The LMC555 maintains the same functionality as the LM555 but with significantly lower power dissipation and supply current spikes, making it an efficient choice for timing and pulse generation applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Fast Astable Frequency | 3 MHz | |
| Supply Operating Voltage | 1.5 V to 5 V | V |
| Typical Power Dissipation at 5V | < 1 mW | mW |
| Output Current Levels | -10 mA to 50 mA | mA |
| Operating Temperature Range | -40°C to 85°C | °C |
| Package Types | SOIC, VSSOP, PDIP, 8-bump DSBGA | |
| Thermal Resistance (Junction-to-Ambient) | 138.9°C/W (SOIC), 188.3°C/W (VSSOP), 93.1°C/W (PDIP), 102.3°C/W (DSBGA) | °C/W |
Key Features
- Fast astable frequency of 3 MHz
- Available in the industry's smallest 8-bump DSBGA package (1.43mm × 1.41mm)
- Less than 1 mW typical power dissipation at 5V supply
- Output fully compatible with TTL and CMOS logic at 5V supply
- Tested to -10 mA, 50 mA output current levels
- Reduced supply current spikes during output transitions
- Extremely low reset, trigger, and threshold currents
- Excellent temperature stability
- Pin-for-pin compatible with 555 series of timers
Applications
- Precision timing
- Pulse generation
- Sequential timing
- Time delay generation
- Pulse width modulation (PWM)
- Pulse position modulation
- Linear ramp generators
Q & A
- What is the maximum astable frequency of the LMC555?
The LMC555 has a maximum astable frequency of 3 MHz. - What are the available package types for the LMC555?
The LMC555 is available in SOIC, VSSOP, PDIP, and 8-bump DSBGA packages. - What is the typical power dissipation of the LMC555 at 5V supply?
The typical power dissipation is less than 1 mW at 5V supply. - Is the LMC555 compatible with TTL and CMOS logic?
Yes, the output of the LMC555 is fully compatible with TTL and CMOS logic at 5V supply. - What is the operating temperature range of the LMC555?
The operating temperature range is -40°C to 85°C. - How is the output pulse width controlled in monostable mode?
The output pulse width is controlled by the time constant of an RC network. - Can the LMC555 operate in both astable and monostable modes?
Yes, the LMC555 can operate in both astable and monostable modes. - What are the thermal resistance values for different packages?
The thermal resistance values are 138.9°C/W for SOIC, 188.3°C/W for VSSOP, 93.1°C/W for PDIP, and 102.3°C/W for DSBGA. - Is the LMC555 pin-for-pin compatible with other 555 series timers?
Yes, the LMC555 is pin-for-pin compatible with the 555 series of timers. - What are some common applications of the LMC555?
Common applications include precision timing, pulse generation, sequential timing, time delay generation, PWM, pulse position modulation, and linear ramp generators.
