Texas Instruments Simple Reset/Power-On Reset, LM809M3X-4.00/NOPB, Active Low, Push-Pull Output, 4V Threshold, 140ms Reset Timeout, SOT-23-3, -40°C to 105°C.
| Parameter | Value |
|---|---|
| Type | Simple Reset/Power-On Reset |
| Mounting | Surface Mount |
| Voltage - threshold | 4V |
| Number of voltages monitored | 1 |
| Operating temperature | -40°C ~ 105°C (TA) |
| Reset | Active Low |
| Output | Push-Pull, Totem Pole |
| Package | Bulk |
| Reset timeout | 140ms Minimum |
| Case | TO-236-3, SC-59, SOT-23-3 |
The LM809M3X-4.00/NOPB: With a minimum reset timeout of 140ms, the output holds the system in reset long enough for the supply and oscillator to stabilise after power-up.
Housed in a SOT-23-3 package (also known as TO-236-3 or SC-59), the three-pin footprint — VDD, GND, and RESET — routes directly to the microcontroller's supply and reset input with no external components beyond a decoupling cap.
It has an active-low reset output with a push-pull, totem-pole stage, so it drives the reset line high or low without an external pull-up resistor.
No — the TL7702BID has an open-drain output and supports both active-high and active-low resets with a 270 ns typical propagation delay, while the LM809M3X-4.00/NOPB is push-pull, active-low only, with a 140 ms timeout. The pinout and supply voltage range also differ; a board spin is required.