Pin Function Grouping

0:40

Read 10 knowledge entries.

Read "TLC555IDR SOIC-8 complete pin table pin numbers names and functions TRIG THRES RESET OUT DISCH CONT GND VDD" in 21491.pdf.

Read 21491.pdf.

Thought for a moment

Yes — for the TLC555IDR 8-pin SOIC, each pin belongs to exactly one functional group:

Table

Group	Pins
Power	Pin 8: VDD
Ground	Pin 1: GND
Timing / Analog Inputs	Pin 2: TRIG, Pin 6: THRES, Pin 5: CONT
Control	Pin 4: RESET
Output	Pin 3: OUT
Discharge	Pin 7: DISCH

I would not duplicate any pin across groups. Even though CONT, TRIG, and THRES all affect timing behavior, each pin is assigned only once based on its primary function from the datasheet.

adrian95

apply it

flux

1:31

Thought for a moment

Thought for 12 sec

Thought for a moment

Read schematic.

Applied the functional grouping to all 8 TLC555IDR terminal pins and verified the properties were set. Each pin is assigned to exactly one group: Power, Ground, Timing / Analog Inputs, Control, Output, or Discharge.

Run ERC check

Show pin groups

Check datasheet guidance

Add decoupling capacitor

Set Pin Type to "Power In" on VDD, Set Section to "Power" on VDD, and 26 more changes

Set VDD's Pin Type to "Power In"

Set VDD's Section to "Power"

Set VDD's Pin Group to "Power"

Set VDD's Pin Orientation to "Top"

Set VDD's Pin Description to "Supply Voltage Input"

Set GND's Pin Type to "Ground"

Set GND's Section to "Ground"

Set GND's Pin Group to "Ground"

Set GND's Pin Orientation to "Bottom"

Set GND's Pin Description to "Ground Return"

Set TRIG's Pin Type to "Input"

Set TRIG's Section to "Timing / Analog Inputs"

Set TRIG's Pin Group to "Timing / Analog Inputs"

Set TRIG's Pin Orientation to "Left"

Set TRIG's Pin Description to "Trigger Input"

Set THRES's Pin Type to "Input"

Set THRES's Section to "Timing / Analog Inputs"

Set THRES's Pin Group to "Timing / Analog Inputs"

Set THRES's Pin Orientation to "Left"

Set THRES's Pin Description to "Threshold Input"

Set CONT's Pin Type to "Input"

Set CONT's Section to "Timing / Analog Inputs"

Set CONT's Pin Group to "Timing / Analog Inputs"

Set CONT's Pin Orientation to "Left"

Set CONT's Pin Description to "Control Voltage Input"

Set RESET's Pin Type to "Input"

Set RESET's Section to "Control"

Set RESET's Pin Group to "RESET"

Set RESET's Pin Orientation to "Left"

Set RESET's Pin Description to "Reset Control Input"

Set OUT's Pin Type to "Output"

Set OUT's Section to "Output"

Set OUT's Pin Group to "Output"

Set OUT's Pin Orientation to "Right"

Set OUT's Pin Description to "Timer Output"

Set DISCH's Pin Type to "Output"

Set DISCH's Section to "Discharge"

Set DISCH's Pin Group to "DISCH"

Set DISCH's Pin Orientation to "Right"

Set DISCH's Pin Description to "Discharge Switch Output"

Finished working

THRES

Pin Number

TRIG

Pin Number

DISCH

Pin Number

OUT

Pin Number

RESET

Pin Number

CONT

Pin Number

VDD

Pin Number

GND

Pin Number

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Project Name

TLC555IDR

Description

555 Type, Timer/Oscillator (Single) IC 2.1MHz 8-SOIC

The TLC555IDR is a low-power CMOS timer device designed as a functional replacement for the standard bipolar 555 timer while providing significantly reduced supply current and improved operating efficiency. The device supports both astable and monostable operating modes and is commonly used for timing generation, pulse shaping, oscillation, PWM generation, delay circuits, and frequency generation applications.

The CMOS architecture enables low power consumption, rail-to-rail output capability, and stable timing performance over a wide operating voltage range. The device is suitable for battery-powered systems, portable electronics, industrial controls, instrumentation, consumer products, and embedded electronic designs.

The TLC555IDR is supplied in a compact SOIC surface-mount package intended for automated PCB assembly and space-constrained applications.

Electrical Characteristics CMOS low-power timer architecture Functional equivalent to standard 555 timer devices Wide operating supply voltage range Low quiescent supply current High input impedance Rail-to-rail output swing capability Stable threshold and trigger levels Compatible with TTL and CMOS logic levels Capable of astable and monostable operation Adjustable duty cycle and frequency operation High output drive capability for direct interfacing Low noise and improved switching performance compared to bipolar 555 timers Functional Features Precision timing generation Oscillator and clock generation Pulse-width modulation support One-shot pulse generation Delay timer implementation Missing pulse detection Frequency divider implementation Sequential timing control LED flashing and tone generation PWM motor and power control applications Package Information Surface-mount SOIC package Standard tape-and-reel packaging format Compact footprint for automated assembly RoHS compliant device construction Environmental and Operating Conditions Industrial operating temperature range ESD protection handling required Suitable for commercial and industrial embedded systems Designed for low-power electronic applications Typical Applications Timer circuits Pulse generators Oscillators PWM controllers LED flashers Alarm and tone generators Frequency generators Power management timing Embedded control systems Portable battery-powered electronics

#commonpartslibrary #integratedcircuit #timer #oscillator

Properties

Manufac… Number

TLC555IDR

Manufac…er Name

Texas Instruments

Part Type

Integrated Circuit

Datasheet URL

ti.com/lit/ds/symlink/tlc555.pdf

Designator Prefix

Package …se Code

8-SOIC

Symbol Style

parametric-v1

Pricing & Availability

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adrian95 / TLC555IDR

Schematic