Analog Devices Inc./Maxim Integrated MAX16057ATT46+T

Overview

The MAX16057ATT46+T from Analog Devices is a nanoPower microprocessor supervisory circuit in a 6-pin TDFN package, designed to monitor a single VCC supply and assert an active-low reset when voltage drops below the factory-trimmed 4.625V threshold. It features capacitor-adjustable reset timeout (14.18ms typical with 2700pF), ultra-low 125nA typical supply current at 3.3V/25°C, and operates across -40°C to +125°C for automotive-grade reliability. It is used in battery-powered medical monitors and portable instrumentation where low quiescent power and precise brownout detection are critical.

For engineers reviewing the MAX16057ATT46+T datasheet, MAX16057ATT46+T pinout, MAX16057ATT46+T application, or MAX16057ATT46+T equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive temperature operation, exact reset threshold tolerance (±1.5% at 25°C), and real-world design implications of its capacitor-timed reset and push-pull output configuration.

Technical Context

The MAX16057ATT46+T implements a precision bandgap-based voltage monitor with 2.5% total threshold tolerance over -40°C to +125°C and 0.5% hysteresis to prevent chatter during slow VCC ramps. Its internal timer uses SRT ramp current (210–240nA) and ramp threshold (1.235V) to generate a reset timeout period directly proportional to external capacitor value (tRP = 5.15 × 10⁶ × CSRT).

Unlike watchdog-equipped variants (MAX16056/MAX16058), the MAX16057ATT46+T omits WDI, SWT, and WDS pins-eliminating watchdog logic, timeout sampling, and mode selection circuitry. This simplifies layout and reduces leakage paths, making it suitable for static supervision where only power-on/brownout reset assurance is required.

Key Specifications

Pinout & Package

Package: 6-pin 3mm × 3mm TDFN-EP (exposed pad); RoHS-compliant, tape-and-reel delivery (T suffix). Thermal resistance θJA = 42°C/W enables stable operation in compact, thermally constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16057ATT45+T, the MAX16057ATT46+T offers higher reset threshold for improved noise margin in 5V systems; compared with TPS3808G33DBVR, it delivers 14× lower supply current and field-programmable timeout-critical for energy-constrained medical and metering designs.

Availability

MAX16057ATT46+T is available at Aetrix Electronics and suitable for glucose monitors, patient vital sign recorders, smart utility meters, and automotive cabin sensors requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX16057ATT46+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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.

The MAX16056–MAX16059 family was engineered specifically for ultra-low-power, high-reliability supervision in battery-operated medical, automotive, and industrial edge devices-emphasizing nanoamp current, wide temperature operation, and capacitor-configurable timing.

FAQ

What is the exact reset threshold voltage of the MAX16057ATT46+T?

The MAX16057ATT46+T has a factory-trimmed reset threshold of 4.625V (typical), with a tolerance of ±1.5% at +25°C and ±2.5% over the full –40°C to +125°C operating range. This value is confirmed in Table 1 of the official Analog Devices datasheet, where suffix "46" explicitly maps to 4.625V falling threshold. The MAX16057ATT46+T does not support user adjustment of this threshold-it is laser-trimmed during production.

Does the MAX16057ATT46+T include a watchdog timer function?

No, the MAX16057ATT46+T does not include a watchdog timer. It belongs to the MAX16057/MAX16059 variant group, which omits WDI, SWT, and WDS pins entirely-unlike the MAX16056/MAX16058 series. The MAX16057ATT46+T provides only VCC monitoring, manual reset, and capacitor-adjustable reset timeout. This simplification reduces leakage and layout complexity where watchdog functionality is unnecessary.

What capacitor value sets the standard 14.18ms reset timeout for the MAX16057ATT46+T?

A 2700pF capacitor connected between the SRT pin and GND sets the typical reset timeout of 14.18ms for the MAX16057ATT46+T, as documented in Table 2 of the datasheet. This value is derived from the formula tRP = 5.15 × 10⁶ × CSRT (with tRP in seconds and CSRT in farads). The MAX16057ATT46+T requires low-leakage ceramic capacitors (e.g., X7R dielectric) to maintain timing accuracy.

Can the MAX16057ATT46+T operate with a 1.2V supply voltage?

Yes, the MAX16057ATT46+T operates down to VCC = 1.1V, so it functions reliably at 1.2V. At this voltage, its supply current is 125–175nA (typ/max) over –40°C to +85°C, and RESET remains valid-ensuring compatibility with ultra-low-voltage MCUs such as ARM Cortex-M0+ derivatives. The MAX16057ATT46+T guarantees RESET assertion as long as VCC ≥ 1.1V, per Electrical Characteristics table.

Is the exposed pad (EP) on the MAX16057ATT46+T required to be connected to ground?

While the exposed pad (EP) on the MAX16057ATT46+T is not electrically mandatory, Analog Devices strongly recommends connecting it to GND. Doing so improves thermal dissipation (reducing junction temperature by ~9°C/W), enhances EMI immunity, and stabilizes the ground reference for the internal voltage reference. The datasheet states "CONNECT EXPOSED PAD TO GND" in the pin diagram, and leaving EP floating may degrade long-term reliability in thermally stressed applications.