Transcription of ICM7555 General purpose CMOS timer - NXP
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ICM7555 General purpose CMOS timer - NXP
1. General descriptionThe ICM7555 is a cmos timer providing significantly improved performance over thestandard NE/SE555 timer , while at the same time being a direct replacement for thosedevices in most applications. Improved parameters include low supply current, wideoperating supply voltage range, low THRESHOLD,TRIGGER, andRESET currents, nocrowbarring of the supply current during output transitions, higher frequency performanceand no requirement to decouple CONTROL_VOLTAGE for stable ICM7555 is a stable controller capable of producing accurate time delays the one-shot mode, the pulse width of each circuit is precisely controlled by oneexternal resistor and capacitor. For astable operation as an oscillator, the free-runningfrequency and the duty cycle are both accurately controlled by two external resistors andone capacitor. Unlike the NE/SE555 device, the CONTROL_VOLTAGE terminal need notbe decoupled with a capacitor. TheTRIGGER andRESET inputs are active LOW. Theoutput inverter can source or sink currents large enough to drive TTL loads or provideminimal offsets to drive cmos FeaturesnExact equivalent in most applications for NE/SE555nLow supply current: 80 A (typical)nExtremely low trigger, threshold, and reset currents: 20 pA (typical)nHigh-speed operation: 500 kHz guaranteednWide operating supply voltage range guaranteed 3 V to 16 V over full automotivetemperaturesnNormal reset function; no crowbarring of supply during output transitionnCan be used with
General purpose CMOS timer 8. Limiting values [1] Due to the SCR structure inherent in the CMOS process used to fabricate these devices, connecting any terminal to a voltage greater than VDD + 0.3 V or less than GND −0.3 V may cause destructive latch-up. For this reason it is recommended that no inputs from
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