ICM7555 General Purpose Timers

The ICM7555 and ICM7556 are CMOS RC timers providing significantly improved performance over the standard SE/NE555/6 and 355 timers, while at the same time being direct replacements 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.

Specifically, the ICM7555 and ICM7556 are stable controllers capable of producing accurate time delays or frequencies. The ICM7556 is a dual ICM7555, with the two timers operating independently of each other, sharing only V+ and GND. 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 regular bipolar 555/6 devices, the CONTROL VOLTAGE terminal need not be decoupled with a capacitor. The circuits are triggered and reset on falling (negative) waveforms, and the output inverter can source or sink currents large enough to drive TTL loads, or provide minimal offsets to drive CMOS loads.

ICM7555 特点

Exact Equivalent in Most Cases for SE/NE555/556 or TLC555/556
Low Supply Current
- ICM7555 60uA
- ICM7556 120uA
Extremely Low Input Currents 20pA
High Speed Operation 1MHz
Guaranteed Supply Voltage Range 2V to 18V
Temperature Stability 0.005%/oC at 25oC
Normal Reset Function - No Crowbarring of Supply During Output Transition
Can be Used with Higher Impedance Timing Elements than Regular 555/6 for Longer RC 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
Outputs have Very Low Offsets, HI and LO
Pb-Free Available (RoHS Compliant)

ICM7555 应用

Precision Timing
Pulse Generation
Sequential Timing
Time Delay Generation
Pulse Width Modulation
Pulse Position Modulation
Missing Pulse Detector

ICM7555 芯片订购指南

芯片型号	产品状态	温度范围	封装尺寸图	潮湿敏感度等级MSL	美元价格US $
ICM7555CBA	量产	民用级	8 Ld SOIC	1	0.26
ICM7555CBA-T	量产	民用级	8 Ld SOIC T +R	1	0.26
ICM7555CBAZ	量产	民用级	8 Ld SOIC	1	0.21
ICM7555CBAZ-T	量产	民用级	8 Ld SOIC T +R	1	0.21
ICM7555IBA	量产	工业级	8 Ld SOIC	1	0.26
ICM7555IBAT	量产	工业级	8 Ld SOIC T +R	1	0.26
ICM7555IBAZ	量产	工业级	8 Ld SOIC	1	0.21
ICM7555IBAZ-T	量产	工业级	8 Ld SOIC T +R	1	0.21
ICM7555IPA	量产	工业级	8 Ld PDIP	N/A	0.29
ICM7555IPAZ	量产	工业级	8 Ld PDIP	N/A	0.24
ICM7555ITV	停产	工业级	8 Ld Can	N/A	N/A
ICM7555MTV	停产	军用级	8 Ld Can	N/A	N/A