MAX809T
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | TO-236-3, SC-59, SOT-23-3 |
| Mfr | UMW |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C |
| Type | Voltage Detector |
| Output | Push-Pull, Totem Pole |
| Number of Voltages Monitored | 1 |
| Supplier Device Package | SOT-23 |
| Voltage - Threshold | 3.08V |
| Reset | Active Low |
| Reset Timeout | 150ms Minimum |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | MAX809 |
| Standard Package | 3,000 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
MAX809T Supervisor Push-Pull, Totem Pole 1 Channel
The MAX809T is a high-precision active-low push-pull microprocessor supervisory reset IC from Analog Devices (formerly Maxim Integrated), housed in an ultra-compact 3-pin SOT-23 surface-mount package. It features 3.08V precision reset threshold, 12µA ultra-low quiescent current, 140ms minimum guaranteed power-on reset timeout, and supports reset assertion down to 1V VCC, specified for -40°C to +105°C industrial temperature range, making it a space-saving, zero-external-component reliable system power monitoring and reset solution for 3.3V embedded microcontroller systems, portable battery-powered devices, and high-volume consumer electronics.
Key Features and Highlights
● 3.08V Precision 3.3V System Reset Threshold: Accurate 3.08V reset detection threshold perfectly matches standard 3.3V digital system power supply requirements, triggering reliable reset before system voltage drops below MCU stable operating voltage to prevent abnormal code execution.
● 12µA Ultra-Low Quiescent Current: Extremely low operating supply current minimizes extra system power overhead, drastically extending battery runtime for low-power portable and battery-powered embedded devices.
● 140ms Minimum Guaranteed Power-On Reset Timeout: Fixed 140ms minimum reset delay ensures system power rail fully stabilizes before releasing reset, eliminating unstable system startup issues caused by insufficient power supply rise time.
● Active-Low Push-Pull Reset Output: Native push-pull output structure eliminates the need for external pull-up resistors, directly driving MCU reset pins without extra discrete components to simplify circuit design.
● Reset Assertion Down to 1V VCC: Unique low-voltage reset assertion capability maintains valid reset output even when system supply voltage drops as low as 1V, ensuring complete system reset during deep power-down and brownout conditions.
Frequently Asked Questions (FAQ)
Q1: What is the reset output type of the MAX809T variant?
A: It features active-low push-pull reset output, no external pull-up resistor required, directly interfacing with most 3.3V MCU active-low reset pins.
Q2: What is the typical quiescent current of this supervisory IC?
A: It features 12µA typical operating supply current, delivering industry-leading ultra-low power consumption for battery-powered portable designs.
Compatible Alternative Reset Chip List
1. MAX809STRG: An onsemi fully pin-compatible cross-vendor second-source variant of the MAX809T, offering identical 2.93V reset threshold and 140ms reset timeout performance for high-volume production.
2. ADM809T-REEL: An Analog Devices active-low push-pull supervisory reset IC, serving as a fully pin-compatible alternative with extended -40°C to +125°C high-temperature rating for industrial high-temperature deployment scenarios.
3. TPS3808G33DBVR: A Texas Instruments precision 3.3V supervisory reset IC, featuring ultra-low quiescent current and programmable reset timeout for cost-sensitive low-power battery-powered designs.
