Analog Devices Inc./Maxim Integrated MAX6737XKRVD3+

Overview

The MAX6737XKRVD3+ from Maxim Integrated is a dual fixed-voltage microprocessor supervisor IC in SC70-5 package, featuring push-pull active-low RESET output, manual reset (MR) input, and factory-trimmed VCC1/VCC2 thresholds of 3.075V and 2.313V respectively, with 150ms minimum reset timeout. It monitors I/O and core supplies in portable systems requiring low-power, precise voltage supervision.

For engineers reviewing the MAX6737XKRVD3+ datasheet, MAX6737XKRVD3+ pinout, MAX6737XKRVD3+ application, or MAX6737XKRVD3+ equivalent, key selection criteria include its dual fixed-threshold architecture, 6µA supply current, -40°C to +85°C operation, push-pull RESET drive capability, and SC70-5 footprint compatibility with space-constrained embedded designs.

Technical Context

The MAX6737XKRVD3+ implements independent comparators for VCC1 and VCC2, each with ±1.5% threshold accuracy over temperature and 0.5% hysteresis. Its internal timer asserts RESET when either supply falls below its threshold and holds it for ≥150ms after both supplies recover.

It uses a BiCMOS process with 249 transistors, integrates a 1.5kΩ MR pullup resistor, and guarantees valid RESET state while either VCC1 or VCC2 remains above 1.2V - enabling robust operation during brownout conditions.

Key Specifications

Pinout & Package

MAX6737XKRVD3+ is housed in a 5-pin SC70-5 package with exposed pad (not electrically connected), measuring 1.6mm × 1.6mm × 0.9mm. Pin 1 is marked by dot; pin numbering follows standard SC70 top-view convention (counterclockwise from mark).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-voltage supervisor applications.

Compared with MAX6736XKRVD3+, the MAX6737XKRVD3+ offers direct-drive push-pull RESET, simplifying layout and reducing component count; versus TPS3808G15DBVR, it provides true dual-rail supervision essential for modern processors with separate I/O/core domains.

Availability

MAX6737XKRVD3+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, wearable fitness trackers, and automotive infotainment subsystems requiring stable component supply and long-term manufacturability.

Supply support for MAX6737XKRVD3+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer markets.

The MAX6736–MAX6745 family was designed specifically for low-power, space-constrained multivoltage systems - delivering precision dual/triple supervision in sub-2mm² packages with nanoamp quiescent current.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6737XKRVD3+?

The MAX6737XKRVD3+ has factory-trimmed reset thresholds of 3.075V for VCC1 and 2.313V for VCC2, as indicated by the "RV" suffix in its part number per Table 1 of the datasheet. These values are guaranteed over -40°C to +85°C with ±1.5% tolerance and 0.5% hysteresis, ensuring reliable supervision of standard 3.3V I/O and 2.5V/2.3V core supplies.

Does the MAX6737XKRVD3+ require an external pullup resistor on the RESET pin?

No, the MAX6737XKRVD3+ features a push-pull RESET output, so it does not require an external pullup resistor. This internal driver actively pulls high or low, enabling direct connection to most microprocessor reset pins. The MAX6737XKRVD3+'s push-pull architecture eliminates BOM cost and layout complexity associated with open-drain alternatives like the MAX6736XKRVD3+.

What is the minimum pulse width required on the MR pin to trigger reset on the MAX6737XKRVD3+?

The MAX6737XKRVD3+ requires a minimum MR input pulse width of 1µs to assert RESET. Once triggered, RESET remains low for the full 150ms timeout period (D3 option), regardless of MR pin state. This short pulse requirement allows reliable manual reset using momentary switches or logic signals without debouncing circuitry.

Can the MAX6737XKRVD3+ monitor a 1.2V core supply?

No, the MAX6737XKRVD3+ is configured with fixed thresholds of 3.075V and 2.313V and cannot monitor a 1.2V supply. For 1.2V core supervision, select a variant with "F" or "E" suffix (e.g., MAX6737XKFD3+) offering VCC2 = 1.050V or 0.833V thresholds. The MAX6737XKRVD3+'s 2.313V VCC2 threshold is optimized for 2.5V/2.3V domains, not sub-1.8V cores.

Is the MAX6737XKRVD3+ RoHS-compliant and lead-free?

Yes, the MAX6737XKRVD3+ is RoHS-compliant and supplied in lead-free packaging. The "+" suffix in the part number explicitly denotes lead-free termination per Maxim's ordering conventions. It meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for reflow soldering up to 260°C peak temperature.