Analog Devices Inc./Maxim Integrated MAX16059ATT29+T

Overview

MAX16059ATT29+T from Analog Devices is a 6-pin TDFN ultra-low-power microprocessor supervisory circuit with factory-trimmed 2.925V reset threshold, capacitor-adjustable reset timeout (10.5–17.0ms), and no watchdog timer. It asserts an active-low push-pull RESET output during VCC brownout, manual reset, or power-up sequencing, and guarantees valid reset down to VCC = 1.1V. It targets battery-powered medical monitors and portable instrumentation requiring nanoscale quiescent current.

For engineers reviewing the MAX16059ATT29+T datasheet, MAX16059ATT29+T pinout, MAX16059ATT29+T application, or MAX16059ATT29+T equivalent, key selection criteria include its 125nA typical supply current at 3.3V, -40°C to +125°C automotive temperature range, 1.1V to 5.5V operating voltage, push-pull RESET output configuration, and absence of watchdog functionality compared to MAX16056/MAX16058 variants.

Technical Context

The MAX16059ATT29+T implements a precision bandgap-based voltage monitor with ±2.5% threshold accuracy over temperature and 0.5% hysteresis to prevent chatter during VCC recovery. Its internal timing relies on ramp-current–based capacitor charging (SRT pin) for reset timeout generation, with IRAMP1 = 210–240nA and VRAMP1 = 1.173–1.297V defining the timing slope and threshold.

Unlike watchdog-equipped variants, MAX16059ATT29+T omits WDI, WDS, and SWT pins-confirmed by its 6-pin TDFN package and Pin Description table-and instead provides dedicated MR input with 250ns MR-to-RESET delay and guaranteed glitch rejection up to 200ns, enabling robust manual reset in noisy environments.

Key Specifications

Pinout & Package

MAX16059ATT29+T uses a 6-pin 3mm × 3mm TDFN-EP package with exposed pad (EP) recommended to be connected to GND for thermal and EMI performance. The pinout is validated per Analog Devices datasheet Rev 7 (10/24), Figure "Pin Configurations" and "Pin Description" table.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16059ATT29+T, MAX16057ATT29+T offers identical electrical and mechanical behavior with minor marking variance, while TPS3808G33DBVR trades nanoscale current and flexible threshold for lower cost and broader vendor availability-but sacrifices critical features for medical and ultra-low-power use cases.

Availability

MAX16059ATT29+T is available at Aetrix Electronics and suitable for glucose monitoring systems, patient vital sign monitors, smart utility meters, and HVAC sensor nodes requiring stable component supply across extended product lifecycles and automotive-grade temperature operation.

Supply support for MAX16059ATT29+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, serving industrial, automotive, communications, and healthcare markets.

The MAX16056–MAX16059 family was designed specifically for ultra-low-power supervisory functions in battery-critical applications such as portable medical devices and remote sensors, emphasizing nanoscale current, wide temperature operation, and capacitor-programmable timing.

FAQ

What is the factory-trimmed reset threshold voltage of the MAX16059ATT29+T?

The MAX16059ATT29+T has a factory-trimmed reset threshold voltage of 2.925V (typical), with ±2.5% tolerance over the full -40°C to +125°C temperature range. This value is confirmed in Table 1 of the Analog Devices datasheet under suffix "29", and applies exclusively to the MAX16059ATT29+T variant-not to other suffixes or family members like MAX16056.

Does the MAX16059ATT29+T include a watchdog timer function?

No, the MAX16059ATT29+T does not include a watchdog timer. As specified in the "Typical Operating Circuit and Ordering Information" section and confirmed by its 6-pin TDFN package (lacking WDI, WDS, and SWT pins), the MAX16059ATT29+T is a watchdog-free variant. Watchdog capability is exclusive to MAX16056 and MAX16058 (8-pin versions) per the datasheet's device comparison table.

What is the maximum recommended capacitor value for the SRT pin on the MAX16059ATT29+T?

The maximum recommended capacitor value for the SRT pin on the MAX16059ATT29+T is 4.7µF, as stated in the "Applications Information" section. Using larger values may cause timing inaccuracies due to leakage current effects; ceramic X7R dielectric is required for low leakage (<10nA). At 4.7µF, tRP ≈ 24.2s, verified using the formula tRP = 5.15 × 10⁶ × CSRT.

Can the MAX16059ATT29+T operate reliably at VCC = 1.2V?

Yes, the MAX16059ATT29+T is fully specified to operate at VCC = 1.2V, as confirmed in the "Electrical Characteristics" table under "Supply Voltage" (MIN = 1.2V for -40°C to 0°C). Its RESET output remains valid and asserted down to VCC = 1.1V, making it suitable for ultra-low-voltage battery applications where supply drops below 1.5V during discharge.

Is the exposed pad (EP) on the MAX16059ATT29+T package required to be connected to ground?

Yes, the exposed pad (EP) on the MAX16059ATT29+T TDFN package should be connected to GND, as explicitly instructed in the "Pin Configurations" diagram footnote ("*CONNECT EXPOSED PAD TO GND"). Doing so improves thermal dissipation (θJC = 9°C/W) and reduces EMI susceptibility-critical for stable operation in sensitive medical and measurement applications.