Overview

Product details

    The XL556 series is a single-chip timing circuit manufactured using TI LinCMOS ™ The process provides full compatibility with CMOS, TTL, and MOS logic, operating at frequencies up to 2 MHz. Precise time delays and oscillations can be achieved with low power consumption across the entire supply voltage range. The XDXL/556 has a trigger level of about one-third of the supply voltage and a threshold level of about two-thirds of the supply voltage. When the trigger input drops below the trigger level, the trigger is set, and the output becomes high, these levels can be changed by using the control voltage terminal. If the trigger input is higher than the trigger level and the threshold input is higher than the threshold level, the trigger resets and the output is low. The reset input overwrites all other inputs and can be used to start a new timing cycle. If the reset input is low, the trigger is reset and the output is low. When the output is low, providing a low impedance path between the discharge terminal and ground, while the CMOS output is capable of sinking more than 100 mA and powering more than 10 mA, the XL556 exhibits greatly reduced supply current spikes during output conversion. As tested by MIL-STD-883C Method 3015, these devices have internal electrostatic discharge (ESD) protection circuits that prevent catastrophic failures at voltages below 2000 V.