Analog Devices Inc./Maxim Integrated MAX6464XR23+T

Overview

MAX6464XR23+T from Maxim Integrated is a micropower supervisory circuit with active-low push-pull output, 2.3V lower trip threshold (VTH−), and minimum 150ms reset timeout period. It monitors VCC supply voltage in battery-powered systems, asserts reset during undervoltage conditions, and holds reset for ≥150ms after recovery-ensuring reliable µP initialization. Designed for portable medical devices and cellular handsets requiring ultra-low quiescent current (1.0µA at 3.6V) and ±2.5% threshold accuracy over −40°C to +125°C.

For engineers reviewing the MAX6464XR23+T datasheet, MAX6464XR23+T pinout, MAX6464XR23+T application, or MAX6464XR23+T equivalent, key selection criteria include guaranteed 150ms minimum reset timeout, 2.3V detection threshold with 5% hysteresis (VTH+ = 2.415V), SC70-3 package compatibility, and immunity to sub-20µs VCC transients per threshold overdrive.

Technical Context

The MAX6464XR23+T implements a precision bandgap reference, comparator, and internally trimmed resistor network to set VTH− = 2.300V (±2.5%) and VTH+ = 2.415V (5% hysteresis). Its internal timeout circuit enforces a minimum 150ms reset assertion after VCC recovers above VTH+, independent of propagation delay.

It operates across 1.2V–6.0V supply range, draws only 1.0µA at 3.6V/25°C, and maintains functional integrity down to −40°C while delivering push-pull active-low output capable of sinking 1.0mA at 0.3V (VCC ≥ 1.2V).

Key Specifications

Pinout & Package

MAX6464XR23+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.9mm), optimized for space-constrained portable designs. Pin 1 is OUT (active-low push-pull), Pin 2 is GND, and Pin 3 is VCC (supply and monitored voltage input).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar µP supervisory applications.

Compared with MAX6464XR23+T, MAX6465XR23+T changes reset polarity but preserves all timing and accuracy specs, while TPS3808G23DBVR adds flexibility via manual reset at the cost of extra pin, larger package, and marginal ICC increase-making MAX6464XR23+T optimal for space- and current-constrained active-low reset applications.

Availability

MAX6464XR23+T is available at Aetrix Electronics and suitable for portable medical devices, cellular handsets, and industrial IoT edge nodes requiring stable component supply, long-term lifecycle support, and lead-free compliance.

Supply support for MAX6464XR23+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.

The MAX6461–MAX6466 product line delivers ultra-low-power voltage supervision for battery-critical systems, with factory-trimmed thresholds and integrated timeout to eliminate external components in space- and energy-constrained designs.

FAQ

What is the exact voltage threshold and hysteresis of MAX6464XR23+T?

The MAX6464XR23+T has a lower trip threshold (VTH−) of 2.300V ±2.5% over −40°C to +125°C, and an upper trip threshold (VTH+) of 2.415V (exactly 5% above VTH−). This hysteresis prevents output oscillation during slow VCC transitions near the 2.3V detection point, and is implemented entirely internally with no external components required.

Does MAX6464XR23+T require external components to operate?

No, MAX6464XR23+T requires no external components. Its precision bandgap reference, comparator, trimmed resistor network, 5% hysteresis circuit, and 150ms timeout timer are fully integrated. The SC70-3 package contains only VCC, GND, and active-low OUT pins-enabling direct connection to µP reset inputs without pullups, capacitors, or resistors.

What is the reset timeout behavior of MAX6464XR23+T during power-up?

During power-up, MAX6464XR23+T asserts its active-low reset output when VCC rises above 1.2V and holds it asserted until VCC exceeds VTH+ (2.415V), then continues asserting for a minimum of 150ms. This ensures the microprocessor receives a clean, extended reset pulse even after VCC stabilizes-critical for reliable initialization of clocks, memory, and peripherals.

Can MAX6464XR23+T monitor voltages below 2.3V or above 5.5V?

MAX6464XR23+T is specified to monitor VCC from 1.2V to 6.0V, but its detection function is only active and guaranteed within the 1.6V–5.5V range per datasheet. Below 1.6V, the internal circuitry may not reliably assert reset; above 5.5V, the device remains functional but threshold accuracy is not characterized. For robust operation, use MAX6464XR23+T strictly within its 2.3V nominal detection window.

Is MAX6464XR23+T compatible with SC70-3 footprint designs using other MAX646x variants?

Yes, MAX6464XR23+T shares identical SC70-3 mechanical dimensions, pinout (OUT-GND-VCC), and solder reflow profile with all MAX6461–MAX6466 SC70-3 variants (e.g., MAX6464XR22+T, MAX6465XR23+T). This allows drop-in replacement across threshold and output-type variants-provided the application accepts the specific 2.3V trip point and active-low push-pull behavior of MAX6464XR23+T.