Datasheet ICM7555 (NXP)
| Manufacturer | NXP |
| Description | General purpose CMOS timer |
| Pages / Page | 22 / 1 — ICM7555 General purpose CMOS timer. Rev. 02 — 3 August 2009. Product data … |
| File Format / Size | PDF / 125 Kb |
| Document Language | English |
ICM7555 General purpose CMOS timer. Rev. 02 — 3 August 2009. Product data sheet. General description. Features
Model Line for this Datasheet
ICM7555
Text Version of Document
ICM7555 General purpose CMOS timer Rev. 02 — 3 August 2009 Product data sheet 1. General description
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.
2. Features
n Exact equivalent in most applications for NE/SE555 n Low supply current: 80 µA (typical) n Extremely low trigger, threshold, and reset currents: 20 pA (typical) n High-speed operation: 500 kHz guaranteed n Wide operating supply voltage range guaranteed 3 V to 16 V over full automotive temperatures n Normal reset function; no crowbarring of supply during output transition n Can be used with higher-impedance timing elements than the NE/SE555 for longer time constants n Timing from microseconds through hours n Operates in both astable and monostable modes n Adjustable duty cycle n High output source/sink driver can drive TTL/CMOS n Typical temperature stability of 0.005 % / °C at 25 °C n Rail-to-rail outputs Document Outline 1. General description 2. Features 3. Applications 4. Ordering information 5. Functional diagram 6. Pinning information 6.1 Pinning 6.2 Pin description 7. Functional description 7.1 Function selection 8. Limiting values 9. Characteristics 10. Typical performance curves 11. Application information 11.1 General 11.2 Power supply considerations 11.3 Output drive capability 11.4 Astable operation 11.5 Monostable operation 11.6 Control voltage 11.7 RESET 12. Package outline 13. Soldering of SMD packages 13.1 Introduction to soldering 13.2 Wave and reflow soldering 13.3 Wave soldering 13.4 Reflow soldering 14. Soldering of through-hole mount packages 14.1 Introduction to soldering through-hole mount packages 14.2 Soldering by dipping or by solder wave 14.3 Manual soldering 14.4 Package related soldering information 15. Abbreviations 16. Revision history 17. Legal information 17.1 Data sheet status 17.2 Definitions 17.3 Disclaimers 17.4 Trademarks 18. Contact information 19. Contents
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.
2. Features
n Exact equivalent in most applications for NE/SE555 n Low supply current: 80 µA (typical) n Extremely low trigger, threshold, and reset currents: 20 pA (typical) n High-speed operation: 500 kHz guaranteed n Wide operating supply voltage range guaranteed 3 V to 16 V over full automotive temperatures n Normal reset function; no crowbarring of supply during output transition n Can be used with higher-impedance timing elements than the NE/SE555 for longer time constants n Timing from microseconds through hours n Operates in both astable and monostable modes n Adjustable duty cycle n High output source/sink driver can drive TTL/CMOS n Typical temperature stability of 0.005 % / °C at 25 °C n Rail-to-rail outputs Document Outline 1. General description 2. Features 3. Applications 4. Ordering information 5. Functional diagram 6. Pinning information 6.1 Pinning 6.2 Pin description 7. Functional description 7.1 Function selection 8. Limiting values 9. Characteristics 10. Typical performance curves 11. Application information 11.1 General 11.2 Power supply considerations 11.3 Output drive capability 11.4 Astable operation 11.5 Monostable operation 11.6 Control voltage 11.7 RESET 12. Package outline 13. Soldering of SMD packages 13.1 Introduction to soldering 13.2 Wave and reflow soldering 13.3 Wave soldering 13.4 Reflow soldering 14. Soldering of through-hole mount packages 14.1 Introduction to soldering through-hole mount packages 14.2 Soldering by dipping or by solder wave 14.3 Manual soldering 14.4 Package related soldering information 15. Abbreviations 16. Revision history 17. Legal information 17.1 Data sheet status 17.2 Definitions 17.3 Disclaimers 17.4 Trademarks 18. Contact information 19. Contents
