Analog Devices Inc./Maxim Integrated MAX969EEE+

Overview

The MAX969EEE+ from Maxim Integrated is a quad micropower comparator with rail-to-rail inputs/outputs, 1.235V ±1.5% internal reference, programmable hysteresis, and open-drain outputs capable of swinging beyond VCC to 6V. It operates from +1.6V to +5.5V single supply, draws 14–22 µA total supply current (3.5–5.5 µA per comparator), and is housed in a 16-pin QSOP package. It is used in battery-powered voltage monitoring and window detection circuits.

For engineers reviewing the MAX969EEE+ datasheet, MAX969EEE+ pinout, MAX969EEE+ application, or MAX969EEE+ equivalent, key selection criteria include ultra-low quiescent current per comparator, guaranteed rail-to-rail input common-mode range down to –0.25V, 10 µs propagation delay at 50 mV overdrive, internal reference accuracy over temperature, and compatibility with 2-cell alkaline/NiMH systems requiring stable threshold detection.

Technical Context

The MAX969EEE+ integrates four independent comparators sharing a common programmable hysteresis input (HYST) and a precision 1.235V bandgap reference output (REF). Its input stage supports –0.25V to (VCC – 0.25V) common-mode range across the full –40°C to +85°C temperature range, enabling reliable operation near ground and supply rails.

All four comparators feature open-drain outputs with <0.4V low-level voltage at 500 µA sink current (VCC > 2.7V) and tolerate continuous short-circuit to GND or VCC. The HYST pin accepts 0.05V to VREF input voltage and enables hysteresis programming up to ±50 mV using external resistors referenced to REF.

Key Specifications

Pinout & Package

The MAX969EEE+ is packaged in a 16-pin QSOP (E16-1) with 0.15mm lead pitch, 10.3mm × 3.91mm body, and RoHS-compliant matte tin plating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad comparator applications.

Compared with TLV3704IPW and LM339AVQPWRQ1, the MAX969EEE+ uniquely combines quad-channel integration, internal 1.235V reference, rail-to-rail inputs, and sub-5 µA/comparator quiescent current - making it the only option that meets all requirements for space-constrained, battery-operated voltage supervisors without external support components.

Availability

The MAX969EEE+ is available at Aetrix Electronics and suitable for battery voltage monitoring, window detection, power sequencing, and ground-fault sensing applications requiring stable component supply and long-term obsolescence management.

Supply support for MAX969EEE+ 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, mixed-signal, and power-management ICs for industrial, medical, communications, and consumer applications.

The MAX965–MAX970 family was engineered for ultra-low-power, single-supply voltage monitoring in portable and energy-constrained systems - emphasizing rail-to-rail operation, integrated references, and programmable hysteresis to minimize external components.

FAQ

What is the maximum supply voltage the MAX969EEE+ can tolerate?

The MAX969EEE+ has an absolute maximum supply voltage of +6V. However, its specified operating range is +1.6V to +5.5V. Operation above +5.5V risks violating parametric limits and may cause permanent damage. All input pins (IN+, IN−, REF, HYST) tolerate voltages from –0.3V to (VCC + 0.3V), and the open-drain outputs swing up to +6.0V regardless of VCC - enabling safe interfacing with higher-voltage logic domains.

Does the MAX969EEE+ require external hysteresis components for stable operation?

No - the MAX969EEE+ includes internal hysteresis and provides a dedicated HYST pin to program hysteresis from ±1 mV to ±50 mV using two external resistors referenced to the internal REF pin. When HYST is tied directly to REF, the device operates with fixed internal hysteresis (~±1 mV). This eliminates the need for external positive-feedback networks required by comparators like the LM339, simplifying design and improving noise immunity in battery-monitoring applications.

Can the MAX969EEE+ operate from a single 1.5V alkaline cell?

The MAX969EEE+ is specified to operate down to +1.6V; operation at +1.5V falls outside guaranteed specifications. While the comparators may function at 1.5V, the internal 1.235V reference degrades below ±2.5% accuracy, propagation delay increases significantly, and output sink capability drops. For reliable 1.5V operation, consider the MAX965 (single comparator variant), which maintains functionality down to +1.0V - though with reduced performance. The MAX969EEE+ is optimized for 2-cell systems (2.0V–3.2V).

How does the HYST pin affect all four comparators in the MAX969EEE+?

In the MAX969EEE+, the HYST pin programs hysteresis identically for all four comparators. Unlike dual comparators such as the MAX967, which share hysteresis across both channels, the MAX969EEE+ applies the same programmed hysteresis band to INA, INB, INC, and IND inputs simultaneously. This ensures consistent noise immunity across all monitored thresholds - critical in applications like multi-rail power sequencing where synchronized hysteresis prevents false triggers during supply ramp-up.

What is the typical input bias current of the MAX969EEE+ over temperature?

The MAX969EEE+ exhibits an input bias current of ±5 nA (typical) over the full –40°C to +85°C range, with a maximum of ±50 nA across the full common-mode range at +25°C. This ultra-low bias current minimizes voltage errors in high-impedance sensor interfaces - for example, introducing <50 µV error across a 10 MΩ source impedance. The bias current remains stable across temperature, enabling accurate long-term measurements in environmental monitoring systems using the MAX969EEE+.