Analog Devices Inc./Maxim Integrated DS1810-15/T&R

Overview

DS1810-15/T&R from Maxim Integrated (now Analog Devices) is a precision voltage-monitoring reset IC with push-pull output, designed to automatically restart microprocessors after power failure. It asserts an active-low reset for 150 ms after V_CC returns to tolerance, features a 4.00–4.24 V trip point, operates from 1.2 V to 5.5 V, and supports -40°C to +85°C industrial temperature range - used in embedded power-up sequencing and brownout protection.

For engineers reviewing the DS1810-15/T&R datasheet, DS1810-15/T&R pinout, DS1810-15/T&R application, or DS1810-15/T&R equivalent, key selection criteria include guaranteed 150 ms reset timeout, 4.12 V typical V_CC trip point, push-pull output capable of sinking 10 mA, operation down to 1.2 V supply, and TO-92/SOT-23 package compatibility.

Technical Context

The DS1810-15/T&R implements a precision temperature-compensated voltage reference and comparator to detect V_CC deviations against its factory-trimmed 4.12 V nominal trip threshold (±15% tolerance). Its internal circuitry generates a power-fail signal that forces RST low during out-of-tolerance conditions.

Upon V_CC recovery, the device holds RST active for a guaranteed 100–300 ms (typ. 150 ms), independent of V_CC slew rate, ensuring stable processor initialization. The push-pull output remains valid down to V_CC = 1.2 V and - with external pull-down - sustains logic state even as V_CC approaches 0 V.

Key Specifications

Pinout & Package

DS1810-15/T&R is available in SOT-23 surface-mount and TO-92 through-hole packages. Both share identical 3-pin configuration and pin function mapping.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage-monitoring reset applications.

Compared with MAX6326–41D and TPS3808G15, the DS1810-15/T&R offers lowest BOM cost via integrated push-pull drive and minimal external components, while delivering industry-standard 150 ms reset hold and proven reliability in long-lifecycle industrial deployments.

Availability

DS1810-15/T&R is available at Aetrix Electronics and suitable for industrial PLCs, smart meters, embedded gateways, and POS terminals requiring stable component supply with consistent parametric performance across production lots.

Supply support for DS1810-15/T&R 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 precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The DS1810-15/T&R belongs to the EconoReset™ family of supervisory circuits, engineered for cost-sensitive embedded systems needing reliable, single-supply power monitoring and reset generation without external passive components.

FAQ

What is the exact V_CC trip point tolerance for DS1810-15/T&R?

The DS1810-15/T&R has a factory-trimmed V_CC trip point of 4.00 V (min), 4.12 V (typ), and 4.24 V (max), corresponding to ±15% tolerance around the nominal 4.12 V threshold. This tolerance band is laser-trimmed during production and specified over the full -40°C to +85°C operating temperature range. The DS1810-15/T&R does not require external calibration or resistor networks to achieve this accuracy.

Does DS1810-15/T&R support operation below 1.2 V supply?

No - the DS1810-15/T&R is specified to operate only down to V_CC = 1.2 V per its Recommended DC Operating Conditions. Below 1.2 V, internal reference and comparator functionality ceases. However, its push-pull output can maintain a valid logic state (low or high) down to 0 V V_CC when a 100 kΩ pull-down resistor is added from RST to GND, as documented in Figure 3 of the DS1810-15/T&R datasheet.

Can DS1810-15/T&R replace DS1810-10 or DS1810-5 in existing designs?

Only if the system's power supply tolerance margin allows a lower trip point: DS1810-15/T&R trips at 4.12 V (±15%), whereas DS1810-10 trips at 4.37 V (±10%) and DS1810-5 at 4.62 V (±5%). Substituting DS1810-15/T&R may cause premature reset assertion on marginal 5 V rails. Pinout and timing are identical, but trip point is not interchangeable without verifying V_CC stability margins in the target application.

What is the maximum sink current capability of DS1810-15/T&R's RST output?

The DS1810-15/T&R RST output can sink up to 10 mA while maintaining ≤0.4 V output voltage, as specified in its DC Electrical Characteristics table. This enables direct interfacing with standard CMOS and TTL reset inputs without external buffering. The output remains functional across the full -40°C to +85°C temperature range and supports continuous sinking during extended reset assertion periods.

Is DS1810-15/T&R available in both TO-92 and SOT-23 packages?

Yes - the DS1810-15/T&R is offered in both TO-92 (through-hole) and SOT-23 (surface-mount) packages, with identical pinout (RST-V_CC-GND), electrical specifications, and thermal ratings. The "/T&R" suffix indicates tape-and-reel packaging, typically associated with SOT-23 delivery, but both variants are orderable. Mechanical drawings for both packages are published in the official DS1810-15/T&R datasheet.