Overview
The LMC555CMMX/NOPB is a CMOS version of the industry-standard 555 series general-purpose timers, produced by Texas Instruments. This device is notable for its low power consumption, high accuracy, and compact packaging. It is available in several package types, including the industry's smallest 8-bump DSBGA package, as well as SOIC, VSSOP, and PDIP packages. The LMC555 offers the same capability of generating accurate time delays and frequencies as the LM555 but with significantly lower power dissipation and supply current spikes. It operates in both astable and monostable modes, making it versatile for various timing applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | VSSOP (DGK), SOIC, PDIP, 8-bump DSBGA | |
| Pins | 8 | |
| Operating Temperature Range | -40 to 85 | °C |
| Maximum Frequency | 3 MHz | |
| Supply Operating Voltage | 1.5 V to 15 V | V |
| Typical Power Dissipation at 5V | < 1 mW | mW |
| Output Current Levels | -10 mA to 50 mA | mA |
| Thermal Resistance (Junction-to-Ambient) | 138.9 (SOIC), 188.3 (VSSOP), 93.1 (PDIP), 102.3 (DSBGA) | °C/W |
Key Features
- Fast astable frequency of up to 3 MHz
- Available in the industry's smallest 8-bump DSBGA package (1.43mm × 1.41mm)
- Less than 1 mW typical power dissipation at 5 V supply
- 1.5 V specified supply operating voltage
- Output fully compatible with TTL and CMOS logic at 5 V 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
- Pulse position modulation
- Linear ramp generators
Q & A
- What is the maximum operating frequency of the LMC555?
The maximum operating frequency of the LMC555 is 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 5 V supply?
The typical power dissipation of the LMC555 at 5 V supply is less than 1 mW.
- Is the LMC555 compatible with TTL and CMOS logic?
- What are the output current levels of the LMC555?
The LMC555 is tested to output current levels of -10 mA to 50 mA.
- Does the LMC555 have reduced supply current spikes?
- What is the temperature stability of the LMC555?
The LMC555 has excellent temperature stability.
- Is the LMC555 pin-for-pin compatible with other 555 series timers?
- What are some common applications of the LMC555?
- How is the time delay controlled in monostable mode?
In monostable mode, the time delay is precisely controlled by a single external resistor and capacitor.
