component

TLC555

Public Made by Adom

by adom

TI CMOS 555 timer, SOIC-8. Low power, up to 2 MHz, 2-15 V, same pinout as NE555. Datasheet-verified.

componenttimer555cmososcillatorsoic-8texas-instruments
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Made with kicad-footprint-generator 10.0 · KiCad file format 20260206
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docs tlc555: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers cross-highlight symbol + footprint viewers · Ray 2mo ago
package.json Publish 0.1.0 · Ray 2mo ago
page.json tlc555: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 28d ago
README.md tlc555: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 1mo ago
tlc555-etched.fit.json tlc555: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tlc555-etched.glb tlc555: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tlc555-etched.step tlc555: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
TLC555.adom-lbr.json TLC555: validated Fusion/EAGLE library + adom-lbr hub, generated from this page's KiCad sources · Ray 2mo ago
tlc555.glb Publish 0.1.0 · Ray 2mo ago
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tlc555.lbr add validated EAGLE .lbr (Fusion library) · Ray 2mo ago
TLC555.lbr TLC555: validated Fusion/EAGLE library + adom-lbr hub, generated from this page's KiCad sources · Ray 2mo ago
tlc555.step add .step (Fusion 3D source) · Ray 2mo ago

TLC555

Texas Instruments · CMOS timer (555) · SOIC-8

The CMOS version of the 555 timer, pin-for-pin compatible with the bipolar NE555 but far more efficient. It draws only about 1 mA (versus ~10 mA), runs from 2 to 15 V, reaches 2 MHz, and does not glitch the supply when its output switches, so it works well in battery and mixed-signal designs where the classic 555 is too noisy or thirsty. It builds the same astable oscillators and monostable one-shots: an RC network on TRIG/THRES sets the timing, RESET forces the output low, and CONT trims the threshold. Drop it in wherever an NE555 is called for and needs less power.

Pinout

Pin Name Type Function
1 GND power_in Ground (0 V) reference for the device.
2 TRIG input Trigger input. Start of timing input: pulling TRIG below 1/2 CONT (~1/3 VDD) sets the output high and opens the discharge switch.
3 OUT output High-current timer output. Rail-to-rail CMOS output; sinks up to 100 mA and sources up to 10 mA typical.
4 RESET input Active-low reset input. Overrides all other inputs; when low, forces the output low and the discharge switch on to start a new timing cycle. Tie high (to VDD) when unused.
5 CONT input Control voltage. Sets the comparator thresholds (open-circuit value is 2/3 VDD); allows an external voltage to modulate timing or a bypass capacitor (typically 10 nF) to ground for noise immunity.
6 THRES input Threshold input. End of timing input: when THRES exceeds CONT (~2/3 VDD) the output goes low and the discharge switch turns on.
7 DISCH output Discharge. Open-drain (open-collector) output to discharge the external timing capacitor to GND during the low half of the timing cycle.
8 VDD power_in Positive supply voltage. Single-supply operation from 2 V to 15 V (TLC555C); IDD typically 250 uA at VDD = 5 V.

Key specifications

Parameter Value
Type CMOS timer (astable / monostable)
Supply voltage 2-15 V
Supply current ~1 mA (low power)
Max frequency 2.1 MHz
Output CMOS push-pull
Compatibility pin-identical to NE555
Timing external RC on TRIG/THRES
Package SOIC-8

Ordering variants

Same part, different packaging or reel option.

  • TLC555CD (SOIC-8, tube)
  • TLC555CDR (SOIC-8, tape & reel)

CAD (KiCad official)

  • Symbol: Timer:TLC555xD
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D)
  • 3D model files: tlc555-etched.step / tlc555-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tlc555.step / tlc555.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (47 pp, sha256 1bb22975b6bc1294, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF