Analog Devices Inc./Maxim Integrated DS1233DZ-15/T&R

Overview

DS1233DZ-15/T&R from Maxim Integrated (now Analog Devices) is a 5V microprocessor supervisory circuit with 15% V_CC trip point, 350 ms reset timeout, and SOT-223-4 package. It monitors power supply integrity, asserts active-low RESET during out-of-tolerance conditions, and supports Motorola 68XXX and HC16 microprocessors in embedded control systems.

For engineers reviewing the DS1233DZ-15/T&R datasheet, DS1233DZ-15/T&R pinout, DS1233DZ-15/T&R application, or DS1233DZ-15/T&R equivalent, key selection criteria include guaranteed 15% V_CC threshold accuracy, 350 ms minimum reset pulse width, internal 5 kΩ pull-up resistor, -40°C to +85°C operation, and SOT-223-4 thermal performance for industrial power-on reset sequencing.

Technical Context

The DS1233DZ-15/T&R implements a precision temperature-compensated voltage reference and comparator to detect V_CC drop below 4.0 V (min), holding RESET active until V_CC recovers and remains stable for ≥250 ms. Its internal logic ensures no false release during marginal supply recovery.

Unlike basic RC reset circuits, it delivers deterministic timing: t_RST = 250–450 ms (typ. 350 ms), t_RPD = 100 ns propagation delay from V_CC fault detection to RST assertion, and operates with only 50 µA quiescent current - enabling reliable reset generation without external components beyond optional debouncing.

Key Specifications

Pinout & Package

SOT-223-4 surface-mount package with exposed thermal pad; compact footprint (6.7 mm × 3.7 mm × 1.8 mm) optimized for space-constrained industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX691ACSA+ and TPS3808G15DBVR, the DS1233DZ-15/T&R offers lowest component count and smallest footprint for fixed 15% 5V monitoring, with guaranteed 350 ms reset hold and factory-trimmed accuracy - ideal for cost-sensitive, space-constrained industrial resets where watchdog functionality is unnecessary.

Availability

DS1233DZ-15/T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic equipment, point-of-sale terminals, and smart energy meters requiring stable component supply and long-term obsolescence management.

Supply support for DS1233DZ-15/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 (acquired Maxim Integrated in 2021) designs high-performance analog, mixed-signal, and power management ICs for precision sensing, signal conditioning, and system supervision.

The DS1233DZ-15/T&R belongs to Maxim's EconoReset™ family - engineered specifically for cost-effective, single-function power-on reset generation in industrial and embedded systems where simplicity and reliability outweigh feature expansion.

FAQ

What is the exact V_CC trip point range for DS1233DZ-15/T&R?

The DS1233DZ-15/T&R has a guaranteed V_CC trip point range of 4.0 V (minimum), 4.125 V (typical), and 4.24 V (maximum) at -40°C to +85°C. This 15% tolerance window relative to 5V ensures robust undervoltage detection while accommodating manufacturing variation and temperature drift - a specification confirmed in the DS1233D datasheet Absolute Maximum and DC Electrical Characteristics tables.

Does DS1233DZ-15/T&R require an external pull-up resistor on the RESET pin?

No, DS1233DZ-15/T&R includes an internal pull-up resistor of 3.75–6.25 kΩ on the active-low RESET output, eliminating the need for an external component in standard 5V microprocessor interfaces. However, if interfacing with 3.3V or lower logic families, an external pull-up to the target V_DD may be required to ensure valid high-level voltage.

What is the reset pulse width specification for DS1233DZ-15/T&R?

The DS1233DZ-15/T&R provides a reset pulse width of 250–450 ms, with 350 ms typical, measured from V_CC recovery to RESET deassertion. This timing is factory-tested and guaranteed across temperature and supply voltage, ensuring microprocessors have sufficient stabilization time before executing boot code - critical for reliable operation in industrial environments.

Is DS1233DZ-15/T&R compatible with Motorola 68XXX microprocessors?

Yes, DS1233DZ-15/T&R is explicitly listed as compatible with Motorola 68XXX series microprocessors in its official datasheet Features section. Its timing parameters - including 100 ns V_CC-to-RST propagation delay and 350 ms reset hold - meet the reset timing requirements of 68000, 68020, and related derivatives used in legacy industrial control systems.

What package type does DS1233DZ-15/T&R use, and how many pins does it have?

DS1233DZ-15/T&R uses the SOT-223-4 surface-mount package with four terminals: PIN 1 (GROUND), PIN 2 (RESET), PIN 3 (V_CC), and PIN 4 (GROUND thermal pad). The "Z" suffix in the part number denotes SOT-223 packaging, and the "T&R" indicates tape-and-reel delivery format - verified in Maxim's ordering information and mechanical drawings.