Analog Devices Inc./Maxim Integrated DS1810-5+

Overview

DS1810-5+ from Maxim Integrated (now Analog Devices) is a 5V precision voltage supervisor IC with push-pull active-low reset output, monitoring VCC trip point at 4.50–4.75 V and asserting reset for 100–300 ms after power recovery; used in microprocessor power-up sequencing and brownout protection circuits.

For engineers reviewing the DS1810-5+ datasheet, DS1810-5+ pinout, DS1810-5+ application, or DS1810-5+ equivalent, key selection criteria include guaranteed 150 ms reset timeout, operation down to 1.2 V VCC, push-pull output capable of sinking 10 mA, -40°C to +85°C industrial temperature range, and TO-92/SOT-23 package compatibility.

Technical Context

The DS1810-5+ integrates a precision temperature-compensated voltage reference and comparator to detect VCC deviations beyond ±5% of 5 V (4.50–4.75 V trip window). Its internal logic ensures reset remains asserted during power-up until VCC stabilizes and for ≥100 ms thereafter.

Unlike open-drain supervisors, the DS1810-5+ uses a push-pull output stage enabling direct interface with CMOS inputs without external pull-up; it maintains valid RST state even as VCC drops below 1.2 V when a 100 kΩ pull-down resistor is added to ground per Figure 3.

Key Specifications

Pinout & Package

DS1810-5+ is available in both TO-92 and SOT-23 packages - both 3-pin, same pin assignment: Pin 1 = RST (active-low reset output), Pin 2 = VCC (supply input), Pin 3 = GND (ground reference).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G50DBVR and MAX809TRD3+T, the DS1810-5+ uniquely provides push-pull output and guaranteed operation down to 1.2 V VCC-critical for brownout resilience in cost-sensitive industrial controllers where external components must be minimized.

Availability

DS1810-5+ is available at Aetrix Electronics and suitable for microcontroller power sequencing, industrial PLC I/O modules, smart meter battery backup, and medical diagnostic handhelds requiring stable component supply and long-term manufacturability.

Supply support for DS1810-5+ 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

Analog Devices (via acquisition of Maxim Integrated) designs high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The DS1810-5+ belongs to Maxim's EconoReset™ family-low-cost, single-supply voltage supervisors engineered for reliable power-fail detection and reset generation in resource-constrained embedded systems.

FAQ

What is the exact VCC trip point range for DS1810-5+?

The DS1810-5+ has a guaranteed VCC trip point range of 4.50 V to 4.75 V at -40°C to +85°C, corresponding to ±5% tolerance around 5 V. This specification is validated per the manufacturer's DC Electrical Characteristics table and applies across the full operating temperature range without derating.

Does DS1810-5+ require an external pull-up resistor on the RST pin?

No, DS1810-5+ does not require an external pull-up resistor because it features a push-pull output stage. The RST pin actively drives high or low, enabling direct connection to CMOS inputs. This eliminates BOM cost and board space associated with discrete pull-ups-confirmed in the Block Diagram and Application Example sections of the official datasheet.

Can DS1810-5+ operate when VCC falls below 1.2 V?

Yes, DS1810-5+ maintains valid RST output down to 0 V VCC when a 100 kΩ resistor is connected from RST to GND, as shown in Figure 3. Without the resistor, functional operation is guaranteed only down to 1.2 V VCC. This design feature enables fail-safe reset assertion during complete power collapse.

What is the minimum reset pulse width guaranteed by DS1810-5+?

The DS1810-5+ guarantees a minimum reset pulse width (tRST) of 100 ms after VCC returns to tolerance, with typical value 150 ms and maximum 300 ms. This timing is specified under all operating conditions (-40°C to +85°C, VCC = 1.2 V to 5.5 V) and ensures sufficient stabilization time for microprocessors and peripheral ICs.

Which packages are available for DS1810-5+ and are their pinouts identical?

DS1810-5+ is offered in both TO-92 and SOT-23 packages, and both share identical 3-pin assignment: Pin 1 = RST (active-low output), Pin 2 = VCC (supply), Pin 3 = GND. Mechanical drawings confirm identical pin numbering and functional mapping-no layout adaptation needed when migrating between packages.