Analog Devices Inc./Maxim Integrated MAX6736XKLTD3+

Overview

The MAX6736XKLTD3+ from Maxim Integrated is a dual fixed-voltage microprocessor supervisor IC in SC70-5 package, monitoring VCC1 at 4.625V and VCC2 at 3.075V with open-drain active-low RESET output, 150ms minimum reset timeout, and 6µA supply current. It asserts reset when either supply falls below its factory-trimmed threshold and maintains reset for the timeout period after recovery - ideal for portable battery-powered systems requiring precise dual-rail power integrity.

For engineers reviewing the MAX6736XKLTD3+ datasheet, MAX6736XKLTD3+ pinout, MAX6736XKLTD3+ application, or MAX6736XKLTD3+ equivalent, key selection criteria include confirmed dual-supply monitoring thresholds (4.625V/3.075V), SC70-5 footprint compatibility, manual reset input support, -40°C to +85°C industrial temperature range, and low-quiescent-current operation in space-constrained embedded designs.

Technical Context

The MAX6736XKLTD3+ implements two independent precision voltage comparators with factory-trimmed thresholds referenced to internal bandgap references. Its reset logic uses a digital timeout counter triggered on any threshold violation, with automatic restart if a monitored rail dips again before timeout completion.

It features an internal 1.5kΩ pullup on the MR pin and guarantees valid RESET state down to VCC1 = 1.2V. The open-drain RESET output requires an external pullup and supports bidirectional µP reset interfaces without contention when used with a series 4.7kΩ resistor.

Key Specifications

Pinout & Package

Package: SC70-5 (2.0mm × 1.25mm, 0.65mm pitch), surface-mount, lead-free (RoHS-compliant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6736XKLTD3+, MAX6316HUT46D3+ reduces current but sacrifices dual-supply capability, while TPS3808G33DBVR offers push-pull output and identical package but lacks VCC2 monitoring and MR - making MAX6736XKLTD3+ uniquely suited for compact dual-rail portable designs requiring manual reset and sub-10µA operation.

Availability

MAX6736XKLTD3+ is available at Aetrix Electronics and suitable for portable medical sensors, notebook power management, industrial PLC I/O modules, and GPS tracking devices requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.

Supply support for MAX6736XKLTD3+ 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 communication applications.

The MAX6736–MAX6745 family delivers ultra-low-power dual/triple-supply supervision in miniature SC70 packages for battery-critical portable and industrial systems demanding high accuracy and small footprint.

FAQ

What are the exact reset threshold voltages for MAX6736XKLTD3+?

The MAX6736XKLTD3+ has factory-trimmed reset thresholds of 4.625V for VCC1 and 3.075V for VCC2, with maximum deviations of ±75mV and ±50mV respectively over the full -40°C to +85°C operating temperature range. These values are confirmed in Maxim's official datasheet Table 1 and apply specifically to the "LT" suffix variant of the MAX6736 series.

Does MAX6736XKLTD3+ support manual reset functionality?

Yes, MAX6736XKLTD3+ includes a dedicated active-low manual reset (MR) input on Pin 3 with an internal 1.5kΩ pullup to VCC1. A low pulse ≥1µs on MR forces the open-drain RESET output low for the full 150ms timeout period, and the device provides 100ns glitch rejection to prevent false triggering from switch bounce or EMI.

What is the recommended external pullup resistor value for the RESET output of MAX6736XKLTD3+?

For the open-drain RESET output of MAX6736XKLTD3+, a 10kΩ to 100kΩ pullup resistor to VCC1 is recommended. At 3.3V VCC1, a 47kΩ resistor limits sink current to <70µA when RESET is asserted, ensuring compatibility with standard CMOS inputs while minimizing standby power consumption.

Can MAX6736XKLTD3+ monitor supplies below 1.0V?

No, MAX6736XKLTD3+ is designed exclusively for dual fixed-threshold monitoring at 4.625V and 3.075V. It does not support adjustable or sub-1V monitoring. For lower voltages, consider MAX6738/MAX6739 variants with RSTIN input (threshold ~0.488V) or MAX6742/MAX6745 with PFI input - neither applies to the MAX6736XKLTD3+ configuration.

Is MAX6736XKLTD3+ pin-compatible with other MAX6736 variants?

Yes, all MAX6736 variants including MAX6736XKLTD3+ share identical SC70-5 pinout and electrical interface. Thresholds and timeout periods are encoded in the part number suffix (e.g., "LT" = 4.625V/3.075V, "D3" = 150ms), but Pin 1 (RESET), Pin 2 (GND), Pin 3 (MR), Pin 4 (VCC2), and Pin 5 (VCC1) retain consistent function and placement across the MAX6736 family.