Wakes a sleeping microcontroller on a fixed interval and watches it for lock-ups, all at about 35 nA so it barely touches a battery. A single resistor sets the wake period from 100 ms to 7200 s; the WAKE pin pulses the host, which must answer on DONE before the window closes, or the timer asserts RST to reboot it. This offloads periodic wake and watchdog duty from the MCU's own timers, letting it sleep deeper. A staple of ultra-low-power sensor nodes.

Pinout

Pin	Name	Type	Function
1	VDD	power_in	Supply voltage input. Operating range 1.8 V to 5.5 V (absolute max 6 V). Bypass locally with a decoupling capacitor.
2	GND	power_in	Device ground reference. Return for VDD and for the external Rext resistor on the DELAY/M_RST pin.
3	DELAY/M_RST	input	Dual-function timer-interval-set and Manual Reset input. An external resistor Rext to GND programs the wake period (100 ms to 7200 s, 1650 selectable intervals); a pushbutton to VDD (VIH >= 1.5 V) on the same pin triggers a manual reset (20 ms valid, 20 ms debounce).
4	DONE	input	Watchdog acknowledge input driven by the host microcontroller to indicate successful processing of the WAKE pulse. Logic thresholds: VIH >= 0.7VDD, VIL <= 0.3VDD. Minimum pulse width 100 ns.
5	WAKE	output	Push-pull timer output pulse asserted every tIP period to wake the host microcontroller. Active-high, ~20 ms pulse width; VOH >= VDD - 0.3 V @ 100 uA, VOL <= 0.3 V @ 100 uA.
6	RSTn	output	Active-low reset output to the host microcontroller (open-drain, external pull-up required, e.g., 100 kOhm). Asserted on manual reset and watchdog timeout; tRSTn pulse width 320 ms typical.

Key specifications

Parameter	Value
Type	Programmable watchdog / wake timer
Supply current	35 nA (typ)
Interval	100 ms to 7200 s (resistor-set)
Outputs	WAKE pulse, RST on timeout
Handshake	DONE input
Supply	1.8-5.5 V
Package	SOT-23-6

Ordering variants

Same part, different packaging or reel option.

TPL5010DDCR (SOT-23-6)
TPL5010DDCT (SOT-23-6, small reel)

CAD (KiCad official)

Symbol: Timer:TPL5010 (KiCad official)
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (27 pp, sha256 a62ae27e1c3dd0ce, 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