Analog Devices Inc./Maxim Integrated MAX6737XKTGD3-T

Overview

MAX6737XKTGD3-T from Maxim Integrated is a dual fixed-voltage microprocessor supervisor IC with push-pull active-low reset output, manual reset input, and factory-trimmed thresholds of 3.075V (VCC1) and 2.313V (VCC2). It asserts reset if either supply falls below its threshold and maintains reset for ≥150ms after recovery. Designed for portable multivoltage systems, it delivers 6µA total supply current and operates from -40°C to +85°C in the 5-pin SC70 package.

For engineers reviewing the MAX6737XKTGD3-T datasheet, MAX6737XKTGD3-T pinout, MAX6737XKTGD3-T application, or MAX6737XKTGD3-T equivalent, key selection criteria include dual fixed-threshold supervision, push-pull RESET drive capability, 150ms timeout, low quiescent current, and SC70 space-constrained packaging for battery-powered embedded designs.

Technical Context

The MAX6737XKTGD3-T integrates two independent voltage comparators monitoring VCC1 and VCC2 against precision factory-set thresholds, with internal timing logic enforcing a minimum 150ms reset assertion period after all supplies recover. Its push-pull RESET output drives directly to VCC1 without external pullup, simplifying interface to microprocessors requiring active-high or bidirectional reset pins via series resistor.

It features an internal 1.5kΩ pullup on the MR input, enabling direct connection to momentary switches or CMOS logic. The device guarantees valid RESET state while either VCC1 or VCC2 remains above 1.2V, supporting robust operation during brownout conditions in core/I/O supply domains.

Key Specifications

Pinout & Package

MAX6737XKTGD3-T is housed in a 5-pin SC70-5 package (2.0mm × 1.25mm × 0.95mm), optimized for ultra-compact PCB layouts in space-constrained portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6736XKTGD3-T, the MAX6737XKTGD3-T eliminates external pullup components and reduces layout risk, while TPS3808G33DBVR cannot replace dual-supply monitoring-making MAX6737XKTGD3-T the sole fit for compact, low-power dual-rail reset coordination.

Availability

MAX6737XKTGD3-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, multivoltage systems, and notebook computers requiring stable component supply with guaranteed long-term availability and lead-free compliance.

Supply support for MAX6737XKTGD3-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX6736–MAX6745 product line was designed specifically for ultra-low-power dual- and triple-voltage microprocessor supervision in space- and energy-constrained portable electronics.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6737XKTGD3-T?

The MAX6737XKTGD3-T has factory-trimmed reset thresholds of 3.075V for VCC1 and 2.313V for VCC2, with ±75mV tolerance over the full -40°C to +85°C operating temperature range. These values are defined by the "TG" suffix in the part number and confirmed in Table 1 of the official datasheet. Both thresholds are precision trimmed during production and do not require external calibration.

Does the MAX6737XKTGD3-T require an external pullup resistor on the RESET pin?

No, the MAX6737XKTGD3-T features a push-pull RESET output referenced to VCC1, so no external pullup resistor is needed. This differs from open-drain variants like MAX6736XKTGD3-T. The push-pull architecture allows direct connection to microprocessor reset inputs-including bidirectional pins-when used with a 4.7kΩ series resistor per Figure 5 in the datasheet.

What is the minimum pulse width required on the MR pin to trigger reset on the MAX6737XKTGD3-T?

The MAX6737XKTGD3-T requires a minimum MR input pulse width of 1µs to reliably assert reset. Once triggered, RESET remains low for the full 150ms timeout period after MR returns high. The MR input includes 100ns glitch rejection and is internally pulled up to VCC1 with a 1.5kΩ resistor, allowing direct connection to a momentary switch or CMOS logic output.

Can the MAX6737XKTGD3-T monitor voltages below 1.0V, such as a 0.9V core rail?

No, the MAX6737XKTGD3-T is configured for fixed dual thresholds only (3.075V and 2.313V) and does not support sub-1.0V monitoring. For 0.9V core supply supervision, consider the MAX6738/MAX6739 family with RSTIN adjustable input or the MAX6742/MAX6745 with power-fail comparator. The MAX6737XKTGD3-T's VCC2 input is specified down to 0.9V operation but monitors only at its factory-set 2.313V threshold.

Is the MAX6737XKTGD3-T RoHS-compliant and available in lead-free packaging?

Yes, the MAX6737XKTGD3-T is RoHS-compliant and available in lead-free packaging. Per the Ordering Information section, lead-free versions are ordered using the "+T" suffix (e.g., MAX6737XKTGD3+T). The standard "-T" version is also lead-free compliant per Maxim/Analog Devices' environmental policy, and both variants meet JEDEC J-STD-020 moisture sensitivity level 1 requirements.