Overview
The ICM7555CD,623 is a general-purpose CMOS timer produced by NXP USA Inc. It offers significantly improved performance compared to the standard NE/SE555 timer and is designed to be a direct replacement for those devices in most applications. This timer is known for its low supply current, wide operating supply voltage range, and high frequency performance. It operates in both astable and monostable modes, making it versatile for various timing and clock generation functions.
Key Specifications
| Parameter | Description | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VDD) | Operating Supply Voltage | 3 | - | 16 | V |
| Supply Current (IDD) | At VDD = Vmin | 50 | - | 200 | µA |
| Supply Current (IDD) | At VDD = Vmax | 180 | - | 300 | µA |
| Output Current (IO) | - | - | 100 | mA | |
| Power Dissipation | At Tamb = 25°C (still air) | - | - | 780 | mW |
| Storage Temperature (Tstg) | - | -65 | - | 150 | °C |
| Solder Point Temperature | - | - | 300 | °C | |
| Package Type | - | SOIC-8 | - | - | - |
| Operating Temperature Range | - | 0 | - | 70 | °C |
Key Features
- Low Supply Current: The ICM7555CD,623 operates with a low supply current, typically 180 µA at VDD = Vmax.
- Wide Operating Supply Voltage Range: It can operate within a supply voltage range of 3 V to 16 V.
- High Frequency Performance: The timer can generate frequencies up to 500 kHz.
- No Crowbarring of Supply Current: Unlike the NE/SE555, it does not produce large crowbar currents during output transitions, eliminating the need for supply decoupling in most cases.
- Adjustable Duty Cycle: It supports adjustable duty cycle in astable mode.
- High Output Source/Sink Driver: Capable of driving TTL/CMOS loads.
- Rail-to-Rail Outputs: Provides rail-to-rail output signals.
- Temperature Stability: Offers a typical temperature stability of 0.005 % / °C at 25 °C.
Applications
- Automotive Control: Used in automotive engine control, transmission control, and timing functions for generating precise ignition timing in internal combustion engines.
- Industrial Automation: Synchronizes processes, controls machinery, and coordinates the timing of various operations.
- Digital Signal Processing (DSP): Used for scheduling and timing the execution of specific signal-processing tasks, providing accurate clock signals for maintaining signal integrity.
- Aerospace and Defense: Coordinates and synchronizes various aircraft, radar, and central control systems.
- Precision Timing: Ideal for precision timing, pulse generation, sequential timing, time delay generation, pulse width modulation, and pulse position modulation.
Q & A
- What is the ICM7555CD,623 used for?
The ICM7555CD,623 is a general-purpose CMOS timer used for timing and clock generation functions in various electronic systems.
- What are the key improvements over the NE/SE555 timer?
It offers low supply current, a wide operating supply voltage range, low threshold, trigger, and reset currents, no crowbarring of the supply current during output transitions, and higher frequency performance.
- What is the operating supply voltage range of the ICM7555CD,623?
The operating supply voltage range is from 3 V to 16 V.
- What are the typical applications of the ICM7555CD,623?
It is used in automotive control, industrial automation, digital signal processing, aerospace and defense, and precision timing applications.
- Does the ICM7555CD,623 require supply decoupling?
No, it does not require supply decoupling due to the absence of large crowbar currents during output transitions.
- What is the maximum output frequency of the ICM7555CD,623?
The maximum output frequency can reach up to 500 kHz.
- What is the package type of the ICM7555CD,623?
The package type is SOIC-8.
- Is the ICM7555CD,623 RoHS compliant?
- What is the operating temperature range of the ICM7555CD,623?
The operating temperature range is from 0°C to 70°C.
- Can the ICM7555CD,623 be used in both astable and monostable modes?
