Analog Devices Inc./Maxim Integrated DS1233AZ-15/TR/C17

Overview

DS1233AZ-15/TR/C17 from Maxim Integrated is a 3.3V microprocessor supervisory circuit with precision 15% V_CC trip point (2.64–2.80 V), 350ms reset timeout, internal 5kΩ pull-up resistor, and pushbutton debounce functionality. It monitors power supply integrity and provides active-low reset assertion during power-up, power-down, or manual reset events in embedded microcontroller systems.

For engineers reviewing the DS1233AZ-15/TR/C17 datasheet, DS1233AZ-15/TR/C17 pinout, DS1233AZ-15/TR/C17 application, or DS1233AZ-15/TR/C17 equivalent, key selection criteria include V_CC trip accuracy, reset pulse duration, pushbutton interface compatibility, operating temperature range (–40°C to +85°C), and SOT-223 package suitability for space-constrained PCB layouts.

Technical Context

The DS1233AZ-15/TR/C17 implements dual-monitoring logic: a precision temperature-compensated voltage reference compares V_CC against a fixed 15% threshold (2.64–2.80 V), while an edge-detecting input monitors the RST pin for external pushbutton release. Its internal timer ensures 350ms minimum reset assertion after either V_CC recovery or button release.

It integrates debouncing circuitry that pulls RST low upon detection of a falling edge, then holds low for ≥250ms before sampling for rising edge - eliminating need for external RC networks. The device operates with only 50µA quiescent current and supports V_CC from 1.2V to 5.5V, though specified performance applies at 3.3V ±10%.

Key Specifications

Pinout & Package

SOT-223 surface-mount package (4-pin, thermal pad exposed on bottom); pin 4 is ground for thermal and electrical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326–33D3 and TPS3808G33DBVR, the DS1233AZ-15/TR/C17 uniquely combines 15% trip tolerance, 350ms fixed reset hold, internal pull-up, and hardware debounce in a single SOT-223 package-reducing component count and layout complexity for cost-sensitive 3.3V microcontroller systems.

Availability

DS1233AZ-15/TR/C17 is available at Aetrix Electronics and suitable for industrial control, medical handheld devices, smart energy meters, and automotive body electronics requiring stable component supply across extended production lifecycles.

Supply support for DS1233AZ-15/TR/C17 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, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The DS1233AZ-15/TR/C17 belongs to the EconoReset family-engineered to replace discrete reset circuits with minimal external components while delivering reliable power-on and manual reset functionality for 3.3V microcontroller systems.

FAQ

What is the exact V_CC trip voltage range for DS1233AZ-15/TR/C17?

The DS1233AZ-15/TR/C17 has a guaranteed V_CC trip point of 2.64 V to 2.80 V, corresponding to a 15% tolerance band around 3.3 V. This range is specified over the full operating temperature range (–40°C to +85°C) and ensures consistent brownout detection without requiring calibration. The DS1233AZ-15/TR/C17 uses a precision temperature-compensated voltage reference to maintain this accuracy across environmental stress.

Does DS1233AZ-15/TR/C17 require an external capacitor for pushbutton operation?

Yes, DS1233AZ-15/TR/C17 requires a capacitor between 100 pF and 0.01 µF connected from the RST pin to ground for proper pushbutton debounce operation. This capacitor filters switch noise and enables the internal timing circuit to detect valid button release. For applications needing higher reset current drive, a minimum 500 pF capacitor plus an external 1 kΩ pull-up resistor is recommended. The DS1233AZ-15/TR/C17 does not function correctly with pushbuttons without this capacitor.

Is DS1233AZ-15/TR/C17 pin-compatible with DS1233A-15 in SOT-223 package?

Yes, DS1233AZ-15/TR/C17 is a direct replacement for DS1233A-15 in SOT-223 package, sharing identical pinout (pins 1–4: GND, RST, V_CC, GND), electrical specifications, and functional behavior. The "Z" suffix denotes tape-and-reel packaging with lead-free finish, while "TR/C17" indicates specific distribution channel coding. No PCB layout changes are needed when upgrading from DS1233A-15 to DS1233AZ-15/TR/C17.

What is the maximum sink current capability of the DS1233AZ-15/TR/C17 RST output?

The DS1233AZ-15/TR/C17 RST output can sink up to +8 mA while maintaining a low-level voltage ≤0.4 V, per its DC electrical characteristics. This allows direct interfacing with standard CMOS and TTL reset inputs without level-shifting or buffering. The DS1233AZ-15/TR/C17 achieves this with an open-drain NMOS output stage, compatible with both internal and external pull-up configurations.

Can DS1233AZ-15/TR/C17 operate with V_CC below 3.3V?

Yes, DS1233AZ-15/TR/C17 is rated for V_CC from 1.2 V to 5.5 V, but its 15% trip point (2.64–2.80 V) and all specified performance parameters-including reset timeout, pushbutton thresholds, and output drive-are guaranteed only when V_CC = 3.3 V ±10%. At lower V_CC, the trip point shifts proportionally and timing may vary; the DS1233AZ-15/TR/C17 is not characterized for reliable operation outside 3.3V nominal systems.