Analog Devices Inc./Maxim Integrated MAX6801UR29D1/V+T

Overview

MAX6801UR29D1/V+T from Maxim Integrated is a precision 2.93V active-low microprocessor supervisory circuit in SOT23-3 package, asserting push/pull RESET during VCC brownout and holding it for ≥1ms after VCC recovery. It operates down to 0.7V, draws only 4µA at 3V, and rejects fast transients-used in battery-powered controllers and industrial μP power monitoring.

For engineers reviewing the MAX6801UR29D1/V+T datasheet, MAX6801UR29D1/V+T pinout, MAX6801UR29D1/V+T application, or MAX6801UR29D1/V+T equivalent, key selection factors include guaranteed reset validity to VCC = 0.7V, factory-trimmed 2.93V threshold with ±1.8% accuracy at +25°C, 1ms minimum timeout, and push/pull output drive capability up to 1.2mA sink.

Technical Context

The MAX6801UR29D1/V+T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC falling below 2.93V, triggering an internally timed reset pulse. Its push/pull output stage actively drives RESET low (≤0.4V at 50µA) and high (≥0.8×VCC at 500µA), eliminating external pull-up components.

Reset assertion is immune to transients ≤30µs at 100mV overdrive, and timing stability is maintained across –40°C to +125°C with <±3% threshold drift. The BiCMOS process ensures low ICC (4–12µA) and robust operation down to 0.7V supply.

Key Specifications

Pinout & Package

MAX6801UR29D1/V+T is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051), with 1.3mm × 0.8mm footprint and 0.95mm height-optimized for space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor reset applications.

Compared with MAX809TRD1+T, the MAX6801UR29D1/V+T offers tighter threshold tolerance (±1.8% vs ±2.5%) and lower ICC (4µA vs 8µA); versus TPS3808G12DBVR, it eliminates external timing components and reduces board area but lacks timeout adjustability.

Availability

MAX6801UR29D1/V+T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, and medical point-of-care devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6801UR29D1/V+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for industrial, automotive, and computing applications.

The MAX6800/MAX6801/MAX6802 family delivers ultra-low-power, factory-trimmed supervisory circuits targeting space- and power-constrained μP systems needing deterministic reset behavior without external components.

FAQ

What is the exact reset threshold voltage of MAX6801UR29D1/V+T and how tightly is it specified?

The MAX6801UR29D1/V+T has a factory-trimmed nominal reset threshold of 2.93V, guaranteed within ±1.8% at +25°C and ±3% over the full –40°C to +125°C operating range. This precision eliminates need for external calibration and ensures consistent brownout response across temperature extremes in the MAX6801UR29D1/V+T.

Does MAX6801UR29D1/V+T require an external pull-up resistor on its RESET pin?

No. The MAX6801UR29D1/V+T features a push/pull output stage that actively drives RESET low during fault and high when deasserted-no external pull-up resistor is needed. This simplifies layout, reduces component count, and improves noise immunity compared to open-drain alternatives, making the MAX6801UR29D1/V+T ideal for compact, high-reliability designs.

What is the minimum supply voltage at which MAX6801UR29D1/V+T guarantees valid RESET assertion?

The MAX6801UR29D1/V+T guarantees correct RESET state down to VCC = 0.7V, with full functionality-including comparator accuracy and output drive-maintained across this range. This allows the MAX6801UR29D1/V+T to assert reset reliably during deep brownout events before system collapse, critical for data integrity in battery-backed systems.

How does MAX6801UR29D1/V+T handle fast power-supply transients?

The MAX6801UR29D1/V+T's reset comparator rejects negative-going VCC transients ≤30µs in duration when overdriven by 100mV, preventing false resets during switching noise or load-dump events. This transient immunity is built into the comparator architecture and requires no external filtering-ensuring robust operation in electrically noisy environments for the MAX6801UR29D1/V+T.

Is MAX6801UR29D1/V+T pin-compatible with other supervisory ICs in the same family?

Yes. The MAX6801UR29D1/V+T shares identical SOT23-3 pinout (GND, RESET, VCC) and footprint with all MAX6800/MAX6801/MAX6802 variants, as well as pin-compatible parts like MAX809/MAX810 and MAX6326/MAX6327. This enables drop-in replacement within the same output type group-confirming mechanical and electrical interoperability for the MAX6801UR29D1/V+T.