LMC555CMX/NOPB Texas Instruments 计时器和支持产品 CMOS TIMER

1 Features

1• Industry's Fastest Astable Frequency of 3 MHz

• Available in 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 Supply Operating Voltage Ensured

• 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

2 Applications

• Precision Timing

• Pulse Generation

• Sequential Timing

• Time Delay Generation

• Pulse Width Modulation

• Pulse Position Modulation

• Linear Ramp Generators

3 Description The LMC555 device is a CMOS version of the industry standard 555 series general-purpose timers. In addition to the standard package (SOIC, VSSSOP, and PDIP) the LMC555 is also available in a chipsized package (8-bump DSBGA) using TI's DSBGA package technology. The LMC555 offers the same capability of generating accurate time delays and frequencies as the LM555 but with much lower power dissipation and supply current spikes. When operated as a one-shot, the time delay is precisely controlled by a single external resistor and capacitor. In the astable mode the oscillation frequency and duty cycle are accurately set by two external resistors and one capacitor. The use of TI's LMCMOS process extends both the frequency range and the low supply capability.