Analog Devices Inc./Maxim Integrated DS1833Z-10+T&R

Overview

DS1833Z-10+T&R from Maxim Integrated (now Analog Devices) is a precision 5V microprocessor supervisory circuit with 10% V_CC trip point, active-high reset output, and guaranteed 350 ms reset pulse width after power recovery. It features internal 5 kΩ pull-up, temperature-compensated voltage reference, and operates from -40°C to +85°C in SOT-223 package. Used in embedded controllers requiring reliable power-on reset and brown-out detection.

For engineers reviewing the DS1833Z-10+T&R datasheet, DS1833Z-10+T&R pinout, DS1833Z-10+T&R application, or DS1833Z-10+T&R equivalent, key selection criteria include V_CC trip accuracy (4.25 V to 4.49 V), reset assertion timing (250–450 ms), operating current (1.5–2 mA), and SOT-223 thermal performance for industrial control systems.

Technical Context

The DS1833Z-10+T&R implements a comparator-based power monitor with a precision temperature-compensated bandgap reference to detect V_CC deviations beyond ±10% of 5 V. Its internal logic holds RST high for ≥250 ms after V_CC returns to tolerance, ensuring microprocessor stabilization before release.

It integrates an internal 5 kΩ pull-up resistor on the RST pin and supports fast response to supply droop (t_RPD = 100 ns), while rejecting noise via controlled slew-rate detection thresholds (t_F = 300 µs for 4.75 V → 4.00 V). No external components are required for basic reset functionality.

Key Specifications

Pinout & Package

SOT-223 package: 4-pin surface-mount, thermally enhanced plastic case with exposed thermal pad (pin 4 = GND). Pin 1 = GND, Pin 2 = RST (active-high open-drain output), Pin 3 = V_CC, Pin 4 = GND (thermal and electrical ground).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Compared with MAX6326–MAX6328 and TPS3808G12DBVR, the DS1833Z-10+T&R delivers factory-trimmed ±10% 5 V trip accuracy, integrated pull-up, and SOT-223 thermal robustness-making it optimal for cost-sensitive, high-volume industrial controls where layout simplicity and thermal margin are prioritized over ultra-low I_Q or adjustability.

Availability

DS1833Z-10+T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, smart energy meters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and verified thermal performance in SOT-223 packaging.

Supply support for DS1833Z-10+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

Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for industrial, communications, and computing applications with emphasis on reliability and integration.

The DS1833Z-10+T&R belongs to the EconoReset™ family of supervisory circuits engineered for cost-effective, single-chip power monitoring in resource-constrained embedded systems requiring guaranteed reset timing and factory-trimmed voltage thresholds.

FAQ

What is the exact V_CC trip point range for DS1833Z-10+T&R?

The DS1833Z-10+T&R has a guaranteed V_CC trip point range of 4.25 V (minimum) to 4.49 V (maximum) at 25°C, corresponding to ±10% tolerance around 5 V. This specification is maintained across the full operating temperature range (-40°C to +85°C) due to its temperature-compensated voltage reference. The DS1833Z-10+T&R datasheet confirms this range under DC Electrical Characteristics with note 1 referencing ground-referenced measurements.

Does DS1833Z-10+T&R require an external pull-up resistor on the RST pin?

No, the DS1833Z-10+T&R includes an internal pull-up resistor ranging from 3.75 kΩ to 6.25 kΩ on the RST pin, eliminating the need for an external component in standard TTL/CMOS interfacing. This feature reduces BOM count and layout complexity. However, designers should verify signal integrity on long traces or high-capacitance buses, where an additional pull-up may improve rise time-though the DS1833Z-10+T&R itself functions correctly without it.

What is the reset timeout duration of DS1833Z-10+T&R after V_CC recovery?

The DS1833Z-10+T&R guarantees a minimum reset active time of 250 ms and a maximum of 450 ms after V_CC returns to tolerance, with a typical value of 350 ms. This timing ensures sufficient stabilization of both the 5 V supply rail and connected microprocessor before reset release. The DS1833Z-10+T&R AC Electrical Characteristics table explicitly defines t_RST and t_RPU with these bounds under -40°C to +85°C conditions.

Which package type does DS1833Z-10+T&R use, and how many pins does it have?

The DS1833Z-10+T&R uses the SOT-223 surface-mount package with four pins: Pin 1 (GND), Pin 2 (RST), Pin 3 (V_CC), and Pin 4 (GND-thermal pad). Unlike the TO-92 variant, the SOT-223 version includes a dedicated thermal ground pin for improved power dissipation. Mechanical drawings confirm this configuration, and the DS1833Z-10+T&R ordering code suffix "Z" specifically denotes the SOT-223 package.

Can DS1833Z-10+T&R be used with 3.3 V microcontrollers?

The DS1833Z-10+T&R is designed exclusively for 5 V supply monitoring with a ±10% trip point centered at 5 V (4.25–4.49 V); it is not intended for direct 3.3 V rail supervision. While its V_CC operating range extends down to 1.2 V, the factory-trimmed trip threshold remains fixed at 5 V ±10%. For 3.3 V systems, alternatives like the DS1233A-10 or TPS3808G01 are appropriate. The DS1833Z-10+T&R datasheet clearly specifies its 5 V EconoReset function in the title and description.