Analog Devices Inc./Maxim Integrated MAX16058ATA17+

Overview

MAX16058ATA17+ from Analog Devices is an ultra-low-power microprocessor supervisory circuit with factory-trimmed 1.665V reset threshold, capacitor-adjustable reset timeout (14.18ms typical), watchdog timer, and open-drain RESET output in an 8-pin TDFN package. It monitors single-supply VCC (1.1V–5.5V), asserts active-low reset on brownout, manual reset, or watchdog timeout, and supports automotive-grade operation from –40°C to +125°C - used in glucose monitors and portable medical devices.

For engineers reviewing the MAX16058ATA17+ datasheet, MAX16058ATA17+ pinout, MAX16058ATA17+ application, or MAX16058ATA17+ equivalent, key selection criteria include its 125nA typical supply current, adjustable watchdog timeout via SWT capacitor, WDS input for 128× timeout extension, MR input with 1µs minimum pulse width, and guaranteed RESET validity down to VCC = 1.1V.

Technical Context

The MAX16058ATA17+ implements a precision voltage monitor with ±2.5% threshold accuracy over temperature and 0.5% hysteresis, using internal ramp-based timing for both reset and watchdog functions. Its SRT and SWT pins interface with external capacitors to set tRP = 5.15 × 10⁶ × CSRT and tWD = Floor[CSWT × 5.15 × 10⁶ / 6.4ms] × 6.4ms + 3.2ms, respectively.

Watchdog operation includes normal mode (WDS = GND) and extended mode (WDS = VCC), with automatic sampling of SWT capacitance after RESET deassertion. The device features watchdog capacitor open-detect logic and optional watchdog disable via SWT-to-GND connection.

Key Specifications

Pinout & Package

MAX16058ATA17+ is housed in a 3mm × 3mm, 0.8mm height, 8-pin TDFN-EP package with exposed pad (EP) intended for grounding to improve thermal performance and noise immunity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16056ATA17+, the MAX16058ATA17+ provides open-drain flexibility for multi-source reset buses, while TPS3808G16DBVR trades programmability and nano-power for lower unit cost and smaller footprint in static-supply monitoring roles.

Availability

MAX16058ATA17+ is available at Aetrix Electronics and suitable for glucose monitors, portable medical sensors, automotive cabin sensors, and industrial HVAC controllers requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX16058ATA17+ 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 designed specifically for ultra-low-power, high-reliability supervisory functions in battery-critical and automotive-qualified applications - emphasizing nanoamp current, wide VCC range, and robust timing control.

FAQ

What is the factory-trimmed reset threshold voltage for MAX16058ATA17+?

The MAX16058ATA17+ has a factory-trimmed reset threshold of 1.665V (typical), with tolerance of ±1.5% at +25°C and ±2.5% over –40°C to +125°C. This value corresponds to the "17" suffix per Table 1 in the datasheet, enabling precise brownout detection for 1.8V and lower supply rails. The MAX16058ATA17+ maintains this accuracy without external calibration.

Does MAX16058ATA17+ support watchdog functionality, and how is it configured?

Yes, MAX16058ATA17+ includes a capacitor-adjustable watchdog timer. It is enabled by connecting a capacitor between SWT and GND, and its timeout is selected via WDS: GND for normal mode (e.g., 6.4ms base), VCC for extended mode (×128). The watchdog clears on WDI falling edge or RESET assertion. MAX16058ATA17+ also detects open SWT connections, causing continuous RESET assertion.

What package type and pin count does MAX16058ATA17+ use?

MAX16058ATA17+ uses an 8-pin TDFN-EP (3mm × 3mm) package with exposed pad. Pinout includes RESET (open-drain), GND, SWT, MR, SRT, WDI, WDS, and VCC. The exposed pad (EP) must be soldered to GND for thermal and electrical integrity. This matches the MAX16056/MAX16058 variant group and differs from the 6-pin TDFN used by MAX16057/MAX16059.

How is the reset timeout period set on MAX16058ATA17+?

The reset timeout period (tRP) on MAX16058ATA17+ is set by connecting a capacitor (CSRT) between the SRT pin and GND. The relationship is tRP = 5.15 × 10⁶ × CSRT (seconds), yielding 14.18ms with 2700pF. Recommended capacitor types are low-leakage X7R ceramics (39pF–4.7µF). The MAX16058ATA17+ guarantees tRP accuracy across temperature via internal ramp-current and threshold matching.

Can MAX16058ATA17+ operate reliably at VCC = 1.2V?

Yes, MAX16058ATA17+ operates reliably down to VCC = 1.1V, with full functionality including RESET assertion, MR response, and watchdog timing. At VCC = 1.2V, supply current remains ~125nA (typ), reset threshold is 1.665V (so undervoltage detection activates), and RESET output is guaranteed valid. This makes MAX16058ATA17+ suitable for ultra-low-voltage energy-harvesting and coin-cell systems where VCC may dip near 1.2V during peak load.