TLC555IDR Clock Timer ICS Timers & Support Products CMOS

• Very Low Power Consumption:

– 1mWTypicalatVDD =5V

• Capable of Operation in Astable Mode

• CMOS Output Capable of Swinging Rail to Rail

• High Output Current Capability

  • – Sink: 100 mA Typical

  • – Source: 10 mA Typical

• Output Fully Compatible With CMOS, TTL, and MOS

• Low Supply Current Reduces Spikes During Output Transitions

• Single-Supply Operation From 2 V to 15 V

• Functionally Interchangeable With the NE555; Has Same Pinout

• ESD Protection Exceeds 2000 V Per MIL-STD- 883C, Method 3015.2

• Available in Q-Temp Automotive

  • – High-Reliability Automotive Applications

  • – Configuration Control and Print Support

  • – Qualification to Automotive Standards

 
2 Applications

• Precision Timing

• Pulse Generation

• Sequential Timing

• Time Delay Generation

• Pulse Width Modulation

• Pulse Position Modulation

• Linear Ramp Generator

 
3 Description
The TLC555 is a monolithic timing circuit fabricated using the TI LinCMOSTM process. The timer is fully compatible with CMOS, TTL, and MOS logic, and operates at frequencies up to 2 MHz. Because of its high input impedance, this device uses smaller timing capacitors than those used by the NE555. As a result, more accurate time delays and oscillations are possible. Power consumption is low across the full range of power-supply voltage.
Like the NE555, the TLC555 has a trigger level equal to approximately one-third of the supply voltage and a threshold level equal to approximately two-thirds of the supply voltage. These levels can be altered by use of the control voltage terminal (CONT). When the trigger input (TRIG) falls below the trigger level, the flip-flop is set and the output goes high. If TRIG is above the trigger level and the threshold input (THRES) is above the threshold level, the flip-flop is reset and the output is low. The reset input (RESET) can override all other inputs and can be used to initiate a new timing cycle. If RESET is low, the flip- flop is reset and the output is low. Whenever the output is low, a low-impedance path is provided between the discharge terminal (DISCH) and GND. All unused inputs must be tied to an appropriate logic level to prevent false triggering.
Device Information