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 (±1.2% over temperature), valid RST output down to 0V VCC via external pull-down, and SOT-23-3 package compatibility with space-constrained PCB layouts.

Technical Context

The DS1810R-5+T&R implements a precision bandgap voltage reference and comparator-based monitoring circuit that asserts RST when VCC falls below 4.50V–4.75V (5% tolerance). It maintains reset assertion for 100–300ms after VCC returns to tolerance, ensuring stable processor initialization.

Its push-pull output drives high/low without external pull-up, supports operation down to 1.2V VCC, and-with a 100kΩ RST-to-GND resistor-extends valid reset signaling to 0V VCC during brownout or power-down transitions.

Key Specifications

Pinout & Package

SOT-23-3 surface-mount package with 1.3mm × 2.9mm footprint, 0.95mm height, and gull-wing leads-optimized for automated assembly and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G50DBVR and MAX809SEUR+T, the DS1810R-5+T&R uniquely delivers guaranteed 0V VCC reset validity with integrated push-pull drive-reducing component count and enabling safer shutdown in systems where power collapse must be fully captured.

Availability

DS1810R-5+T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, smart energy meters, automotive body control modules, and medical infusion pumps requiring stable component supply and long-term lifecycle support.

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 healthcare applications.

The DS1810R-5+T&R belongs to Maxim's EconoReset™ family-engineered for cost-sensitive, high-reliability power monitoring in microprocessor-based systems where minimal external components and guaranteed reset timing are critical.

FAQ

What is the exact VCC trip point tolerance for DS1810R-5+T&R?

The DS1810R-5+T&R has a guaranteed VCC trip point range of 4.50V (minimum) to 4.75V (maximum), corresponding to a 5% tolerance centered at 4.62V typical. This specification is tested and validated across the full -40°C to +85°C operating temperature range, with no additional derating required. The DS1810R-5+T&R uses an internal temperature-compensated voltage reference to maintain this accuracy without external calibration.

Does DS1810R-5+T&R support operation below 1.2V VCC?

Yes-the DS1810R-5+T&R maintains a valid RST output down to 0V VCC when a 100kΩ resistor is connected between the RST pin and GND. Without this resistor, the DS1810R-5+T&R operates down to 1.2V VCC. The push-pull output structure enables this extended functionality, unlike open-drain supervisors that require external pull-ups and lose validity near 0V.

What is the reset timeout behavior of DS1810R-5+T&R during power-up?

Upon power-up, the DS1810R-5+T&R holds RST active for 100–300ms after VCC rises above the 4.50V trip threshold. This guaranteed minimum 100ms timeout ensures microprocessors and peripherals stabilize before release. The DS1810R-5+T&R does not rely on external capacitors-timing is internally generated and factory-trimmed for consistency across units and temperatures.

Can DS1810R-5+T&R drive a microcontroller reset pin directly?

Yes-the DS1810R-5+T&R push-pull output can directly drive standard CMOS/TTL reset inputs. It sources up to 350μA at VCC – 0.1V and sinks up to +10mA at 0.4V, meeting or exceeding requirements for most ARM Cortex-M, PIC, and AVR microcontrollers. No external buffer or level shifter is needed, simplifying design and reducing BOM cost for the DS1810R-5+T&R.

Is DS1810R-5+T&R available in both TO-92 and SOT-23 packages?

No-DS1810R-5+T&R is specifically the SOT-23-3 tape-and-reel variant. The TO-92 version is marked DS1810R-5+ and sold in bulk. Pinout and electrical specifications are identical between packages, but DS1810R-5+T&R is optimized for automated pick-and-place assembly and high-density PCB layouts due to its 2.9mm × 1.3mm footprint and gull-wing lead form.