ICM7555CN中文资料General purpose CMOS timer数据手册恩XP规格书

描述 Description

Overview The ICM7555 is a CMOS timer providing significantly improved performance over the standard NE/SE555 timer, while at the same time being a direct replacement for those devices in most applications. Improved parameters include low supply current, wide operating supply voltage range, low THRESHOLD, TRIGGER, and RESET currents, no crowbarring of the supply current during output transitions, higher frequency performance and no requirement to decouple CONTROL_VOLTAGE for stable operation.
The ICM7555 is a stable controller capable of producing accurate time delays or frequencies.
In the one-shot mode, the pulse width of each circuit is precisely controlled by one external resistor and capacitor. For astable operation as an oscillator, the free-running frequency and the duty cycle are both accurately controlled by two external resistors and one capacitor. Unlike the NE/SE555 device, the CONTROL_VOLTAGE terminal need not be decoupled with a capacitor. The TRIGGER and RESET inputs are active LOW. The output inverter can source or sink currents large enough to drive TTL loads or provide minimal offsets to drive CMOS loads.

特性 Features

Exact equivalent in most applications for NE/SE555
Low supply current: 80 uA (typical)
Extremely low trigger, threshold, and reset currents: 20 pA (typical)
High-speed operation: 500 kHz guaranteed
Wide operating supply voltage range guaranteed 3 V to 16 V over full automotive temperatures
Normal reset function; no crowbarring of supply during output transition
Can be used with higher-impedance timing elements than the NE/SE555 for longer time constants
Timing from microseconds through hours
Operates in both astable and monostable modes
Adjustable duty cycle
High output source/sink driver can drive TTL/CMOS
Typical temperature stability of 0.005 pct / Cel at 25 Cel
Rail-to-rail outputs

应用 Application

Precision timing
Pulse generation
Sequential timing
Time delay generation
Pulse width modulation
Pulse position modulation
Missing pulse detector