Analog Devices Inc./Maxim Integrated MAX708TCSA+T

Overview

MAX708TCSA+T from Maxim Integrated is a +3V microprocessor supervisory circuit with active-low RESET and active-high RESET outputs, 3.08V reset threshold, 200ms reset pulse width, and 1.25V power-fail comparator input - used for reliable power-up/power-down sequencing and brownout protection in battery-powered embedded controllers.

For engineers reviewing the MAX708TCSA+T datasheet, MAX708TCSA+T pinout, MAX708TCSA+T application, or MAX708TCSA+T equivalent, this page delivers verified functional identity, exact pin roles, confirmed timing behavior, real-world use cases, and validated alternative parts - all grounded in Maxim's official specifications for the SO-8 packaged MAX708T variant.

Technical Context

The MAX708TCSA+T integrates dual-reset generation (RESET and RESET) with independent power-fail detection via a 1.25V internal reference comparator (PFI/PFO), enabling early warning of supply collapse before main VCC dropout. It operates across 3.15V to 5.5V VCC and guarantees RESET assertion down to VCC = 1V.

Unlike the MAX706 series, the MAX708T lacks a watchdog timer but provides both active-low and active-high reset signals - eliminating need for external inverters in systems requiring multiple reset polarities. Its reset threshold hysteresis is 20mV, and manual reset (MR) is TTL/CMOS-compatible with debounced 200ms output delay.

Key Specifications

Pinout & Package

MAX708TCSA+T is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package, 3.9mm × 4.9mm body, 1.27mm pitch, JEDEC MS-012AC compliant, lead-free (RoHS-compliant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX708TESA+, the MAX708TCSA+T offers identical electrical behavior but narrower temperature qualification; compared with TPS3808G33DBVR, it adds critical dual-reset flexibility and system-level power-fail intelligence - making it superior for safety-critical or feature-rich embedded designs.

Availability

MAX708TCSA+T is available at Aetrix Electronics and suitable for battery-powered equipment, industrial controllers, computing peripherals, and critical µP power monitoring requiring stable component supply across commercial temperature grades.

Supply support for MAX708TCSA+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 power management, sensing, and interface applications - with emphasis on reliability, integration, and low-power operation.

The MAX708 family was engineered specifically for cost-sensitive, space-constrained microprocessor systems needing guaranteed reset timing, dual-polarity outputs, and integrated power-fail warning - targeting portable instrumentation, industrial controls, and embedded computing.

FAQ

What is the reset threshold voltage of the MAX708TCSA+T?

The MAX708TCSA+T has a nominal reset threshold voltage of 3.08V (VCC falling), with ±1.5% tolerance over temperature and supply voltage. This value is fixed for the 'T' suffix variant and ensures reliable reset assertion before 3.3V microprocessors enter undefined operation during brownout conditions. The MAX708TCSA+T does not support adjustable thresholds.

Does the MAX708TCSA+T include a watchdog timer function?

No, the MAX708TCSA+T does not include a watchdog timer. It belongs to the MAX708 series, which replaces the watchdog circuit found in the MAX706 series with dual-reset outputs (RESET and RESET). If watchdog functionality is required, the MAX706TCSA+T - same package and threshold but with WDI/WDO pins - should be selected instead.

What is the purpose of the PFI and PFO pins on the MAX708TCSA+T?

The PFI (Power-Fail Input) pin connects to a resistor divider monitoring an unregulated supply, while the internal 1.25V comparator triggers the PFO (Power-Fail Output) when PFI falls below that threshold. On the MAX708TCSA+T, PFO is an active-low open-drain output used to signal impending power loss - commonly routed to µP interrupt or manual reset to initiate controlled shutdown before VCC dropout.

Can the MAX708TCSA+T operate from a 3.3V supply?

Yes, the MAX708TCSA+T is fully specified for operation from 3.15V to 5.5V VCC, making it compatible with standard 3.3V logic rails. At 3.3V, its quiescent current is ≤100µA, reset pulse width remains 200ms, and output drive meets TTL/CMOS interface requirements - ideal for low-power portable applications powered directly from 3.3V regulators.

What package type is used for the MAX708TCSA+T?

The MAX708TCSA+T uses an 8-pin SOIC (Small Outline Integrated Circuit) package, designated S8-2 in Maxim's ordering nomenclature. It measures 3.9mm × 4.9mm with 1.27mm lead pitch, is RoHS-compliant and lead-free, and is compatible with standard surface-mount assembly and reflow processes.