Analog Devices Inc./Maxim Integrated DS1836C-10

Overview

DS1836C-10 from Maxim Integrated is a 3.3V-compatible microprocessor supervisory circuit with dual-supply power switching, precision voltage monitoring, and non-maskable interrupt generation. It monitors VCC for out-of-tolerance conditions (trip point 2.80–2.97V), switches VOUT between VCC and VBAT at 2.6–2.8V thresholds, asserts RST for 350ms after recovery, and triggers NMI when IN falls below 1.15–1.35V - used in PIC-based embedded systems requiring battery backup and early power-fail warning.

For engineers reviewing the DS1836C-10 datasheet, DS1836C-10 pinout, DS1836C-10 application, or DS1836C-10 equivalent, key selection criteria include its 2.88V typical VCC reset threshold, 2.65V VCC-to-VBAT switchover point, push-pull RST output, -40°C to +85°C operation, and compatibility with 3.3V logic systems requiring deterministic reset timing and supply redundancy.

Technical Context

The DS1836C-10 implements a precision bandgap-referenced comparator for VCC monitoring and IN-sense input, with hysteresis built into its power-switching thresholds (VCCRTP = 2.70–2.80V, VCCFTP = 2.60–2.70V). Its RST output uses a CMOS push-pull structure enabling valid reset assertion down to 0V VCC when externally pulled down, unlike open-drain alternatives.

It integrates three independent functions: (1) power-on/power-fail reset with 350ms timeout, (2) automatic VCC/VBAT supply selection for VOUT with 100mA continuous output capability, and (3) high-impedance IN pin sensing with 1.25V internal reference - all operating from 1.2V to 5.5V supply range without external components.

Key Specifications

Pinout & Package

DS1836C-10 is available in 8-pin SO (150mil) and 8-pin DIP (300mil) packages. Both share identical pin mapping and electrical behavior.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326–26D and TPS3808G125, the DS1836C-10 uniquely integrates reset, power switching, and NMI in one 8-pin package - enabling compact, self-contained backup architectures without external MOSFETs or comparators.

Availability

DS1836C-10 is available at Aetrix Electronics and suitable for industrial PLC controllers, PIC-based data loggers, medical infusion pumps, and smart meters requiring stable component supply, long-term lifecycle support, and guaranteed dual-supply supervisory functionality.

Supply support for DS1836C-10 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, automotive, and computing applications.

The DS1836C-10 belongs to the MicroManager family of supervisory circuits engineered specifically for microprocessor-based systems needing coordinated reset, supply backup, and early power-fail warning in space-constrained designs.

FAQ

What is the exact VCC reset threshold range for DS1836C-10?

The DS1836C-10 has a specified VCC reset threshold range of 2.80V to 2.97V at +25°C, with typical value 2.88V. This threshold is temperature-compensated using an internal bandgap reference, ensuring stability across the full -40°C to +85°C operating range. The DS1836C-10 datasheet confirms this range applies specifically to the "-10" variant, distinguishing it from DS1836A/B (-05) and DS1836C/D (-20) versions.

Does DS1836C-10 support true 0V-valid reset assertion?

Yes, the DS1836C-10 features a CMOS push-pull RST output that can maintain a valid low state even when both VCC and VBAT drop to 0V - provided a 100kΩ pull-down resistor is connected from RST to GND. This capability is explicitly documented in the "OUTPUT VALID CONDITIONS" section and differentiates DS1836C-10 from open-drain reset supervisors. The DS1836C-10's push-pull architecture eliminates reliance on external pull-ups and ensures deterministic reset behavior during complete power collapse.

How does the NMI function work on DS1836C-10?

The DS1836C-10 generates a non-maskable interrupt (NMI) when the voltage at the IN pin falls below 1.15–1.35V, referenced to an internal 1.25V bandgap. The IN pin is high-impedance, allowing flexible sensing via external resistor dividers - for example, detecting 4.5V supply collapse using R1=260kΩ and R2=100kΩ. NMI is open-drain and requires a 10kΩ pull-up. The DS1836C-10's NMI provides ~10μs advance warning before RST assertion, enabling critical save operations before power loss.

What are the VCC-to-VBAT and VBAT-to-VCC switchover voltages for DS1836C-10?

The DS1836C-10 switches VOUT from VCC to VBAT when VCC falls below 2.60–2.70V (VCCFTP), and switches back from VBAT to VCC when VCC rises above 2.70–2.80V (VCCRTP). These asymmetric thresholds provide hysteresis to prevent oscillation during slow VCC transitions. This behavior is confirmed in the "Power Switch (DS1836C & D)" section and distinguishes DS1836C-10 from DS1836A/B variants, which use 3.8–4.0V thresholds. The DS1836C-10's lower thresholds align with 3.3V system requirements.

Is DS1836C-10 compatible with both SO and DIP packages?

Yes, DS1836C-10 is offered in both 8-pin SO (150mil) and 8-pin DIP (300mil) packages, with identical pinout, electrical specifications, and thermal performance. The datasheet explicitly shows both footprints and confirms functional equivalence. Pin 1 orientation, terminal assignments (VCC, VBAT, NC, VOUT, RST, NMI, IN, GND), and AC/DC characteristics are identical across packages. Designers may select based on assembly process or board layout constraints without redesigning the schematic or firmware - the DS1836C-10 behaves identically in either package.