描述

The TLC555 is a monolithic timing circuit fabricated using the TI LinCMOS™ 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.

特性Very Low Power Consumption:1 mW Typical at VDD = 5 VCapable of Operation in Astable ModeCMOS Output Capable of Swinging Rail to RailHigh Output Current CapabilitySink: 100 mA TypicalSource: 10 mA TypicalOutput Fully Compatible With CMOS, TTL, and MOSLow Supply Current Reduces Spikes During Output TransitionsSingle-Supply Operation From 2 V to 15 VFunctionally Interchangeable With the NE555; Has Same PinoutESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015.2Available in Q-Temp AutomotiveHigh-Reliability Automotive ApplicationsConfiguration Control and Print SupportQualification to Automotive Standards

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