ICM7555IPAZ General Purpose Timers: Diagram, Pinout, and Datasheet

The ICM7555IPAZ is a CMOS RC timer that offers much better performance than the traditional SE/NE 555/6 and 355 timers while also serving as direct replacements in most applications. Low supply current, a wide operating supply voltage range, low THRESHOLD, TRIGGER, and RESET currents, no supply current crowbarring during output transitions, higher frequency performance, and no need to decouple CONTROL VOLTAGE  for stable operation are all improved parameters.

The ICM7555 and ICM7556 are two stable controllers that can provide precise time delays or frequencies. The ICM7556 is a dual ICM7555 with two timers that operate independently of one another and only share V+ and GND. One external resistor and capacitor precisely control the pulse width of each circuit in the one-shot mode. Two external resistors and one capacitor accurately control the free-running frequency and duty cycle for astable functioning as an oscillator. Unlike normal bipolar SE/NE 555/6 devices, the CONTROL VOLTAGE  terminal does not require a capacitor to be decoupled. The output inverter can source or sink currents big enough to drive  TTL  loads, or supply small offsets to drive CMOS loads, and the circuits are triggered and reset on falling (negative) waveforms.

The followings are ICM7555IPAZ Symbol, Footprint and 3D Model.

Symbol

Footprint

3D Model

• Exact Equivalent in Most Cases for SE/NE555/556 or TLC555/556

• Low Supply Current

- ICM7555 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60μA

- ICM7556 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120μA

• Extremely Low Input Currents . . . . . . . . . . . . . . . . . 20pA

• High Speed Operation . . . . . . . . . . . . . . . . . . . . . . . 1MHz

• Guaranteed Supply Voltage Range . . . . . . . . . 2V to 18V

• Temperature Stability . . . . . . . . . . . . 0.005%/°C at +25°C

• 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 Plus Anneal Available (RoHS Compliant)

Intersil (Renesas Electronics America) ICM7555IPAZ technical specifications, attributes, parameters and parts with similar specifications to Intersil (Renesas Electronics America) ICM7555IPAZ.

The following is ICM7555IPAZ Functional Block Diagram.

Functional Block Diagram

The ICM7555IPAZ Schematic Diagram is shown as follows.

Schematic Diagram

• Precision Timing

• Pulse Generation

• Sequential Timing

• Time Delay Generation

• Pulse Width Modulation

• Pulse Position Modulation

• Missing Pulse Detector

• Clock & Timing

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