Analog Devices Inc./Maxim Integrated DS1233DZ-5+T&R

Overview

DS1233DZ-5+T&R from Maxim Integrated (now Analog Devices) is a 5V precision power-supply supervisory IC that monitors V_CC and asserts an active-low reset signal during out-of-tolerance conditions. It features ±5% trip point accuracy (4.5V–4.75V), 350 ms reset timeout, internal 5 kΩ pull-up resistor, and operates from –40°C to +85°C - used in microcontroller-based systems requiring reliable power-on reset and brownout protection.

For engineers reviewing the DS1233DZ-5+T&R datasheet, DS1233DZ-5+T&R pinout, DS1233DZ-5+T&R application, or DS1233DZ-5+T&R equivalent, key selection criteria include V_CC trip tolerance (±5%), reset pulse width (250–450 ms), SOT-223 package compatibility, ground-referenced operation, and compatibility with Motorola 68XXX/HC16 microprocessors.

Technical Context

The DS1233DZ-5+T&R implements a precision temperature-compensated voltage reference and comparator to detect V_CC deviations beyond ±5% of 5V. Its internal circuitry forces RST low on power failure and holds it active for 350 ms after V_CC returns to tolerance - ensuring stable microprocessor initialization.

It requires no external components for basic operation due to its integrated 5 kΩ pull-up resistor and ground-referenced design. The device supports both power-up and power-down reset assertion, with fast detection response (<100 ns propagation delay) and immunity to typical supply slew rates (300 µs for 4.75 V → 4.00 V).

Key Specifications

Pinout & Package

SOT-223 surface-mount package with 4-pin configuration (Pin 4 = GND). Compact footprint suitable for space-constrained PCB layouts in industrial controllers and IoT edge nodes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power-supply supervisory applications.

Compared with TPS3808G33DBVR and MAX809SEUR+T, the DS1233DZ-5+T&R uniquely combines 5V ±5% accuracy, integrated pull-up, SOT-223 thermal robustness, and guaranteed 350 ms reset hold - making it optimal for cost-sensitive industrial 5V microcontroller systems needing minimal external components.

Availability

DS1233DZ-5+T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, smart metering units, medical handheld diagnostics, and automotive body control modules requiring stable component supply and long-term manufacturability.

Supply support for DS1233DZ-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 reliable system supervision.

The DS1233DZ-5+T&R belongs to the EconoReset™ family - engineered specifically for cost-effective, single-rail power monitoring in resource-constrained microcontroller applications where accuracy, timing consistency, and minimal external components are critical.

FAQ

What is the exact V_CC trip point tolerance for DS1233DZ-5+T&R?

The DS1233DZ-5+T&R has a guaranteed ±5% trip point tolerance centered at 5V, meaning it asserts reset when V_CC falls below 4.5V (min) and releases reset only after V_CC rises above 4.75V (max). This specification is validated across –40°C to +85°C and matches the "DS1233D-5" variant designation in the EconoReset selection guide. The DS1233DZ-5+T&R maintains this accuracy via an internal temperature-compensated voltage reference.

Does DS1233DZ-5+T&R require an external pull-up resistor on the RESET pin?

No, the DS1233DZ-5+T&R includes an internal pull-up resistor of 3.75–6.25 kΩ, eliminating the need for an external component in most 5V microcontroller reset applications. However, if the target MCU reset input has unusually high leakage or requires stronger pull-up (e.g., >100 µA hold current), an external resistor may still be added - though the DS1233DZ-5+T&R's 8 mA sink capability ensures compatibility with standard CMOS/TTL inputs without it.

What is the reset pulse width behavior of DS1233DZ-5+T&R during power-up and power-down?

During power-up, DS1233DZ-5+T&R holds RESET active for 250–450 ms after V_CC reaches the ±5% trip threshold, ensuring microprocessor stabilization. During power-down, RESET is asserted within <100 ns of V_CC falling below the trip point. Both behaviors are guaranteed across temperature and supply variations, and the DS1233DZ-5+T&R does not differentiate between rising/falling edge timing - it responds identically to any out-of-tolerance condition on the monitored 5V rail.

Is DS1233DZ-5+T&R compatible with Motorola 68XXX and HC16 microprocessors?

Yes, DS1233DZ-5+T&R is explicitly designed for compatibility with Motorola 68XXX series and HC16 microprocessors, as confirmed in the official datasheet features list. Its active-low open-drain RESET output, 8 mA sink drive strength, and 0.4 V low-level output voltage meet the electrical interface requirements of these legacy architectures. The DS1233DZ-5+T&R's timing profile - including 350 ms nominal hold time - aligns with the reset setup/hold timing windows specified for those processors.

What package type and pin count does DS1233DZ-5+T&R use?

DS1233DZ-5+T&R uses the SOT-223 surface-mount package with 4 pins: Pin 1 (GND), Pin 2 (RESET), Pin 3 (V_CC), and Pin 4 (GND). Unlike the TO-92 or SOT-23 variants, the SOT-223 version includes a dedicated second ground pin for improved thermal dissipation and noise immunity - critical in high-density industrial PCBs. This 4-pin configuration is documented in the mechanical drawings section of the Maxim/Analog Devices website.