Analog Devices Inc./Maxim Integrated DS1810-5+T&R

Overview

DS1810-5+T&R from Maxim Integrated (now Analog Devices) is a 5V precision voltage supervisor IC with push-pull active-low reset output, monitoring VCC trip point of 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+T&R datasheet, DS1810-5+T&R pinout, DS1810-5+T&R application, or DS1810-5+T&R equivalent, key selection factors include guaranteed 150 ms minimum reset pulse width, operation down to 1.2 V VCC, push-pull output capable of sinking 10 mA, -40°C to +85°C industrial temperature range, and SOT-23/TO-92 package compatibility.

Technical Context

The DS1810-5+T&R implements a precision temperature-compensated bandgap reference and comparator-based power monitor that triggers reset when VCC falls below 4.50 V (min), with hysteresis ensuring clean release above 4.75 V (max). Its internal timing circuit guarantees ≥100 ms reset assertion after VCC returns to tolerance.

Unlike open-drain supervisors, the DS1810-5+T&R uses a push-pull output stage enabling direct drive of CMOS inputs without pull-up resistors; it maintains valid RST logic states even as VCC drops to 0 V when externally biased with a 100 kΩ resistor to GND.

Key Specifications

Pinout & Package

DS1810-5+T&R is supplied in SOT-23 surface-mount package (3-pin, 1.3 mm × 2.9 mm footprint) and also available in TO-92 through-hole variant; both share identical pin assignment and electrical behavior.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326–MAX6328 and TPS3808G01DBVR, the DS1810-5+T&R uniquely combines push-pull drive, guaranteed 100+ ms reset, and 0 V VCC hold-enabling simpler PCB layout and robustness in deep-brownout scenarios where other supervisors lose output validity.

Availability

DS1810-5+T&R is available at Aetrix Electronics and suitable for industrial control systems, embedded microcontroller platforms, and smart sensor modules requiring stable component supply with long-term lifecycle support.

Supply support for DS1810-5+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 high-performance analog, mixed-signal, and power management ICs for precision sensing, power integrity, and reliability-critical systems.

The DS1810-5+T&R belongs to Maxim's EconoReset™ family of cost-optimized voltage supervisors targeting space-constrained, low-power microprocessor reset applications in industrial and consumer equipment.

FAQ

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

The DS1810-5+T&R has a guaranteed VCC trip point range of 4.50 V (minimum) to 4.75 V (maximum), with 4.62 V typical. This 5% tolerance window is specifically calibrated for nominal 5 V supply monitoring and is temperature-compensated across -40°C to +85°C. The DS1810-5+T&R datasheet specifies these limits under recommended operating conditions and confirms performance without external calibration.

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

No, the DS1810-5+T&R does not require an external pull-up resistor because it features a push-pull output stage. The RST pin actively drives high or low depending on VCC status, eliminating reliance on external components for logic-level definition. This simplifies layout and reduces BOM count compared to open-drain supervisors. The DS1810-5+T&R maintains full drive strength (10 mA sink, VOH ≥ VCC–0.5 V) across its operating range.

Can DS1810-5+T&R maintain a valid reset signal when VCC drops to 0 V?

Yes - when a 100 kΩ resistor is connected between RST and GND, the DS1810-5+T&R maintains a valid low logic state on RST even as VCC approaches 0 V. This zero-VCC hold capability ensures continuous reset assertion during complete power collapse, preventing erratic behavior in downstream logic. The DS1810-5+T&R achieves this via its push-pull structure and internal biasing, as confirmed in Figure 3 of the official datasheet.

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

The DS1810-5+T&R guarantees a minimum reset pulse width of 100 ms after VCC returns to within tolerance. Typical duration is 150 ms, with maximum specified at 300 ms. This timing is internally generated and independent of external RC networks, ensuring consistent processor initialization across temperature and supply variations. The DS1810-5+T&R meets this specification across its full -40°C to +85°C operating range.

Which package types are offered for DS1810-5+T&R?

The DS1810-5+T&R is available in SOT-23 surface-mount package (3-pin, JEDEC MO-178AA compliant) and also in TO-92 through-hole variant. Both packages share identical pinout (RST–VCC–GND), electrical specifications, and thermal performance. The "T&R" suffix in DS1810-5+T&R denotes tape-and-reel packaging for automated SMT assembly, confirming the SOT-23 version is supplied in that format.