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Texas Instruments TLC555QDR — Clock & Timing ICs
Texas Instruments

TLC555QDR LinCMOS Timer, 2.1 MHz, 8-SOIC, -40 to 125°C

MPNTLC555QDR
End of Life

Texas Instruments TLC555QDR, LinCMOS series, Type 555 Timer/Oscillator (Single), 2.1 MHz, 5V ~ 15V supply, 360 µA supply current, -40°C ~ 125°C, 8-SOIC surface mount package.

$0.93Ref. price · indicative, final on quote
TLC555QDR datasheet
Packaging8-SOIC (0.154", 3.90mm Width)
StockContact for availability
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Specifications

TLC555QDR Technical Specifications
ParameterValue
Type555 Type, Timer/Oscillator (Single)
SeriesLinCMOS™
Mounting typeSurface Mount
Voltage5V ~ 15V
Current - supply360 µA
Frequency2.1MHz
Operating temperature-40°C ~ 125°C
PackageTape & Reel (TR); Cut Tape (CT)
Case8-SOIC (0.154\", 3.90mm Width)

Product details

LinCMOS 555 timer for low-power industrial timing

The Texas Instruments TLC555QDR is a LinCMOS 555-type timer/oscillator that runs up to 2.1 MHz while drawing 360 µA supply current.

Temperature grade and deployment context

Rated for -40°C to 125°C, the TLC555QDR is specified for under-hood automotive and outdoor industrial enclosures where a commercial-grade 555 would drift or fail. The 8-SOIC package keeps the footprint small enough for a multi-layer PCB in a motor drive or a remote sensor head.

Active lifecycle — no LTB clock ticking

TI lists the TLC555QDR as Active with ROHS3 compliance. For a BOM line that needs a known-good timer through a multi-year product run, that removes the sourcing risk of a discontinued bipolar 555.

Frequently asked questions

Is TLC555QDR a direct replacement for NE555?

Pin-compatible in the same 8-pin DIP or SOIC footprint, yes — the TLC555QDR drops straight onto a board designed for the NE555. The key difference is the CMOS output stage: the TLC555QDR swings rail-to-rail and draws 360 µA supply current, versus the NE555's roughly 10 mA. At 2.1 MHz it also runs faster than the standard bipolar 555's typical 500 kHz limit. If your circuit relies on the bipolar 555's higher output drive current (200 mA sink/source), check the TLC555QDR's 100 mA output rating — it's lower, but sufficient for most logic-level and MOSFET-gate loads.

How does TLC555QDR differ from standard 555 timers?

The LinCMOS construction cuts supply current from ~10 mA to 360 µA typical, extends the maximum frequency to 2.1 MHz, and allows rail-to-rail output swing. The trade-off is lower output drive: 100 mA versus 200 mA for a bipolar 555. Operating temperature range also widens to -40°C to 125°C, covering automotive and industrial ambient conditions the commercial 555 (0°C to 70°C) cannot.

Is TLC555QDR available in tape and reel packaging?

Yes, the TLC555QDR suffix indicates it ships in Tape & Reel (TR) or Cut Tape (CT) form, which is the standard 8-SOIC carrier for pick-and-place assembly. The package / case is an 8-SOIC with 0.154" body width (3.90 mm).