Timing-tree watchdog for automotive ECUs
The Texas Instruments TPL5010QDDCTQ1 is a programmable timer IC in the Clock & Timing ICs category, designed to generate a periodic reset or wake-up signal in systems that need a supervisory heartbeat. Its 35 nA typical supply current means it can run continuously from a small coin cell or a always-on battery rail without draining the reserve — a key parameter for ECU wake-up circuits that must stay alive through ignition-off periods.
35 nA supply — what it means for the BOM
At 35 nA typical, the TPL5010QDDCTQ1's quiescent current is below the self-discharge rate of most lithium coin cells. In a battery-backed real-time clock or tamper-detection circuit, the timer's own draw does not materially shorten the battery shelf life. The 1.8 V minimum supply also lets it run from a nearly depleted cell down to the end-of-life voltage. The device is housed in a SOT-23-6 Thin / TSOT-23-6 package, a 6-lead surface-mount footprint that fits into compact ECU layouts. The thin profile (0.9 mm seated height typical) suits low-profile enclosures where board-to-lid clearance is tight.
The AEC-Q100 qualification means the part has passed the full suite of automotive stress tests: temperature cycling, ESD sensitivity, latch-up immunity, and extended high-temperature operating life. This is the standard for any ECU, sensor module, or body-control node that must survive 15+ years in a vehicle.