Analog Devices Inc./Maxim Integrated DS1810R-5/T&R

Overview

DS1810R-5/T&R from Maxim Integrated (now Analog Devices) is a 5V precision voltage supervisor IC with push-pull active-low reset output, 4.62V typical VCC trip point, 150ms reset timeout, and -40°C to +85°C operation - used for reliable microprocessor power-up sequencing in embedded control systems.

For engineers reviewing the DS1810R-5/T&R datasheet, DS1810R-5/T&R pinout, DS1810R-5/T&R application, or DS1810R-5/T&R equivalent, key selection criteria include reset threshold accuracy (±0.12V), guaranteed 150ms minimum reset assertion after VCC recovery, push-pull drive capability down to 1.2V supply, and TO-92/SOT-23 package compatibility with legacy and space-constrained designs.

Technical Context

The DS1810R-5/T&R implements a temperature-compensated bandgap reference and comparator to monitor VCC against a fixed 4.62V threshold (±0.12V). It asserts RST low on undervoltage detection and holds it active for ≥100ms (typ. 150ms) after VCC returns to tolerance.

Its push-pull output drives high/low without external pull-up, supports valid logic states down to VCC = 1.2V, and sinks up to 10mA while sourcing 350µA - enabling direct interface with CMOS inputs across wide supply ranges.

Key Specifications

Pinout & Package

DS1810R-5/T&R is available in SOT-23 surface-mount and TO-92 through-hole packages. Both share identical 3-pin configuration and pin functions.

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 DS1810R-5/T&R uniquely combines push-pull output, 4.62V trip accuracy, and sub-1.2V RST validity - reducing external components while supporting robust brownout recovery in cost-sensitive industrial controls.

Availability

DS1810R-5/T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, smart metering modules, automotive body control units, and IoT edge sensor nodes requiring stable component supply and long-term manufacturability.

Supply support for DS1810R-5/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 applications.

The DS1810R-5/T&R belongs to Maxim's EconoReset™ family of voltage supervisors - engineered for cost-effective, reliable power monitoring in resource-constrained embedded systems without sacrificing accuracy or timing control.

FAQ

What is the exact VCC trip voltage range for DS1810R-5/T&R?

The DS1810R-5/T&R has a specified VCC trip point of 4.50V (min), 4.62V (typ), and 4.75V (max) - corresponding to the "-5" suffix denoting ±5% tolerance around 4.62V. This range is guaranteed over -40°C to +85°C and is derived from an internal temperature-compensated voltage reference, ensuring stable reset behavior across operating conditions. The DS1810R-5/T&R datasheet confirms this specification in the DC Electrical Characteristics table.

Does DS1810R-5/T&R require an external pull-up resistor on the RST pin?

No, the DS1810R-5/T&R features a push-pull output stage that actively drives both high and low states, eliminating the need for an external pull-up resistor. This reduces BOM count and PCB area versus open-drain supervisors. The DS1810R-5/T&R can source up to 350µA and sink up to 10mA on RST, making it compatible with standard CMOS inputs without additional components.

What is the minimum VCC required for DS1810R-5/T&R to maintain valid RST output logic levels?

The DS1810R-5/T&R maintains valid RST output logic states down to VCC = 1.2V - verified in the Recommended DC Operating Conditions table. Below 1.2V, a 100kΩ pull-down resistor from RST to GND can extend valid low-state operation to near 0V VCC, enabling safe shutdown signaling. This capability is unique to the DS1810R-5/T&R's push-pull architecture and is documented in the "OUTPUT VALID CONDITIONS" section.

How long does DS1810R-5/T&R assert the reset signal after VCC returns to tolerance?

The DS1810R-5/T&R asserts the active-low reset signal for a guaranteed minimum of 100ms after VCC recovers to within tolerance, with a typical duration of 150ms and maximum of 300ms. This timing is independent of VCC slew rate and ensures sufficient stabilization time for microprocessors and associated circuitry. The DS1810R-5/T&R AC Electrical Characteristics table explicitly defines this parameter as tRST.

Which package types are offered for DS1810R-5/T&R, and are their pinouts identical?

The DS1810R-5/T&R is available in both SOT-23 and TO-92 packages, and both share identical 3-pin assignments: Pin 1 = RST (active-low output), Pin 2 = VCC (supply input), Pin 3 = GND (ground). Mechanical drawings confirm matching pinout orientation between packages, enabling drop-in replacement in designs supporting either form factor. The DS1810R-5/T&R product marking and packaging code "R" indicates SOT-23 tape-and-reel delivery.