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LMC555CN pinout | circuit | timer datasheet Texas Instruments

Explore the LMC555CN Reference Manual for comprehensive details on its pinout, circuit applications, and spice model. This timer's versatile use is well-documented, providing valuable insights and technical specifications essential for your projects.

Brands: Texas Instruments

Download: LMC555CN Datasheet PDF

Package: 8-DIP (0.300, 7.62mm)

Series: -

In Stock: 15,683

Type: 555 Type, Timer/Oscillator (Single)

Frequency: 3MHz

Voltage-Supply: 1.5V ~ 15V

Current-Supply: 150 µA

Price: inquiry

LMC555CN Pinout Equivalent

1：Overview of the LMC555CN:

The LMC555CN is a timer chip based on CMOS technology. Compared to traditional 555 timers, the LMC555CN uses CMOS processes, significantly reducing power consumption, making it excellent for battery-powered devices with high power requirements. The LMC555CN operates over a wide voltage range of 2V to 18V and typically functions within a temperature range of -40°C to 85°C, ensuring stable performance in harsh environments. Its astable mode can generate pulse signals of different frequencies and duty cycles, suitable for clock signals and modulation signals in electronic devices.

2：LMC555CN Important pin function definition:

Pin Number	Pin Name	Description
Pin1	GND	Ground terminal provides circuit reference ground.
Pin2	TRIG	Low-level triggered input terminal. – When the voltage < 1/3 Vcc, trigger the monostable mode or flip the output.
Pin3	OUT	Output terminal, which can output high/low level. – High level is close to Vcc, and low level is close to GND. – Maximum drive current < 50mA (CMOS characteristic).
Pin4	RESET	Reset terminal. – When connected to low level (≤0.4V), it forces the output to low level and disables the timer function.
Pin5	CTRL	Control voltage input terminal. – By default, it is grounded through a 0.01 µF capacitor. The threshold and trigger levels can be adjusted. – When a voltage is directly input, the threshold level is CTRL voltage, and the trigger level is 1/2 CTRL voltage.
Pin6	THR	High-level threshold input terminal. – When the voltage is > 2/3 Vcc (by default) or > CTRL voltage, a low-level output is triggered.
Pin7	DISCH	Discharge terminal, connected to the drain of the internal CMOS transistor. – When outputting high level, floating (high impedance state). When outputting low level, grounded.
Pin8	VCC	Power input terminal, voltage range 1.5V – 15V (supports battery power supply).

3：Alternative model recommendation

TLC555IDR: Adopting CMOS technology, it has low power consumption. The power supply voltage range is 2V – 18V. It has high input impedance, and the output can directly drive CMOS circuits.

MC1455BDR2G: Also based on CMOS technology, with low power consumption. The operating voltage range is 3V – 15V. It has three working modes (monostable, astable, and bistable) similar to LMC555CN.

NE555DR: Classic bipolar timer chip with wide applications. The power supply voltage range is 4.5V – 16V, and it has strong output driving ability.

MAX7219: Strictly speaking, it is not a traditional replacement for the 555 timer. However, it can be an option in some timing and display control applications. It is an integrated display driver that can be used to drive multiple seven-segment digital tubes and has certain timing and control functions.