Overview
The LMC555CMMX from Texas Instruments is a CMOS version of the industry-standard 555 series general-purpose timers. It offers enhanced performance with lower power dissipation and reduced supply current spikes compared to its bipolar counterparts. Available in various packages, including the industry's smallest 8-bump DSBGA package, the LMC555CMMX is designed for applications requiring precise timing and low power consumption. It operates in both monostable and astable modes, allowing it to function as a one-shot pulse generator or a continuous oscillator.
Key Specifications
| Parameter | Min | Max | Units | |
|---|---|---|---|---|
| Operating Temperature Range | -40 | 85 | °C | |
| Supply Operating Voltage | 1.5 | 15 | V | |
| Maximum Frequency | 3.0 | MHz | ||
| Output Rise and Fall Times | 15 | ns | ||
| Power Dissipation at 5V Supply | < 1 | mW | ||
| Output Current Levels | -10 | 50 | mA | |
| Reset, Trigger, and Threshold Currents | 10 | pA | ||
| Package Types | SOIC, VSSOP, PDIP, DSBGA |
Key Features
- Fast astable frequency of up to 3MHz
- Available in industry's smallest 8-bump DSBGA package (1.43mm × 1.41mm)
- Less than 1mW typical power dissipation at 5V supply
- 1.5V specified supply operating voltage
- Output fully compatible with TTL and CMOS logic at 5V supply
- Tested to -10mA, 50mA 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 LMC555CMMX?
The maximum operating frequency of the LMC555CMMX is up to 3MHz.
- What are the available package types for the LMC555CMMX?
The LMC555CMMX is available in SOIC, VSSOP, PDIP, and DSBGA packages.
- What is the typical power dissipation at a 5V supply voltage?
The typical power dissipation at a 5V supply voltage is less than 1mW.
- Is the output of the LMC555CMMX compatible with TTL and CMOS logic?
Yes, the output of the LMC555CMMX is fully compatible with TTL and CMOS logic at a 5V supply.
- What are the operating temperature ranges for the LMC555CMMX?
The operating temperature range for the LMC555CMMX is -40°C to 85°C.
- 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.
- Can the LMC555CMMX operate in both astable and monostable modes?
Yes, the LMC555CMMX can operate in both astable and monostable modes depending on the application requirements.
- What is the significance of the LMCMOS process used in the LMC555CMMX?
The LMCMOS process extends both the frequency range and the low supply capability of the LMC555CMMX.
- How do the reset, trigger, and threshold currents impact the power dissipation?
The extremely low reset, trigger, and threshold currents contribute to the low power dissipation of the LMC555CMMX.
- Is the LMC555CMMX pin-for-pin compatible with other 555 series timers?
Yes, the LMC555CMMX is pin-for-pin compatible with the 555 series of timers.
