Analog Devices Inc./Maxim Integrated DS1233Z-15

Overview

DS1233Z-15 from Analog Devices is a precision 5V microprocessor supervisory circuit in SOT-223 package, providing 15% VCC trip point (4.0V–4.24V), 350ms reset pulse width, internal 5kΩ pull-up resistor, and pushbutton debounce functionality. It monitors power supply integrity and enables manual reset in embedded control systems requiring reliable power-on and brownout recovery.

For engineers reviewing the DS1233Z-15 datasheet, DS1233Z-15 pinout, DS1233Z-15 application, or DS1233Z-15 equivalent, key selection criteria include VCC trip accuracy, reset timing stability over -40°C to +85°C, SOT-223 thermal performance, pushbutton interface requirements, and compatibility with 5V microcontroller reset inputs.

Technical Context

The DS1233Z-15 integrates a temperature-compensated voltage reference and comparator to detect VCC out-of-tolerance conditions at 15% threshold (4.0V–4.24V typ). Its internal 350ms delay timer ensures reset assertion remains active after power recovery or pushbutton release.

It supports dual-mode operation: autonomous power-monitoring reset and external pushbutton-initiated reset with hardware debouncing. The RST pin serves as both open-drain output and input-sense node, requiring an external 100pF–0.01μF capacitor to ground for proper button detection.

Key Specifications

Pinout & Package

SOT-223 package: 4-pin surface-mount outline with exposed thermal pad; pin 4 is dedicated ground for improved noise immunity and thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T and TPS3808G15DBVR, the DS1233Z-15 uniquely combines fixed 15%-tolerance 5V monitoring, integrated pushbutton debounce, and dual-ground SOT-223 packaging-making it optimal for cost-sensitive, space-constrained industrial controllers needing both power and manual reset assurance.

Availability

DS1233Z-15 is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic devices, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DS1233Z-15 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The DS1233Z-15 belongs to the EconoReset family of supervisory ICs designed specifically for cost-effective, reliable power-on and brownout reset generation in 5V microcontroller-based systems.

FAQ

What is the exact VCC trip point range for DS1233Z-15?

The DS1233Z-15 has a guaranteed VCC trip point range of 4.0V to 4.24V, centered at 4.125V (15% below nominal 5V). This specification is validated across the full -40°C to +85°C operating temperature range and ensures robust brownout detection before microprocessor functional failure occurs. The DS1233Z-15 uses a precision temperature-compensated voltage reference to maintain this accuracy without external calibration.

Does DS1233Z-15 require an external capacitor for pushbutton operation?

Yes, DS1233Z-15 requires an external capacitor between the RST pin and ground for reliable pushbutton detection-specifically 100pF to 0.01μF per the datasheet. This capacitor enables proper edge detection and debounce timing. In high-noise environments or when additional reset current is needed, a minimum 500pF capacitor with a parallel 1kΩ external pull-up resistor is recommended. Omitting this capacitor will prevent correct pushbutton reset functionality in the DS1233Z-15.

What is the function of Pin 4 on DS1233Z-15?

Pin 4 on DS1233Z-15 is a dedicated ground terminal, distinct from Pin 1. It provides a second low-impedance ground path to improve noise immunity and thermal dissipation in the SOT-223 package. Both ground pins must be connected to the system ground plane for specified electrical and thermal performance. This dual-ground configuration differentiates DS1233Z-15 from 3-pin variants like the TO-92 DS1233-15 and is essential for stable operation in electrically noisy industrial applications.

How long does DS1233Z-15 hold reset active after power recovery?

The DS1233Z-15 holds the RESET signal active for 250ms to 450ms (typical 350ms) after VCC returns to within tolerance. This delay is generated by an internal timer and ensures the power supply and microprocessor have fully stabilized before releasing reset. The timing is independent of external components and remains consistent across temperature and supply voltage variations, making DS1233Z-15 suitable for deterministic boot sequences in safety-critical systems.

Is DS1233Z-15 RoHS-compliant and lead-free?

Yes, DS1233Z-15 is RoHS-compliant and lead-free, indicated by the "+" suffix in its ordering code (e.g., DS1233Z-15+T&R). Analog Devices confirms compliance with EU RoHS Directive 2011/65/EU and subsequent amendments. The SOT-223 package uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 3 requirements. Full compliance documentation is available through Analog Devices' quality portal for DS1233Z-15.