Analog Devices Inc./Maxim Integrated DS1233AZ-10

Overview

DS1233AZ-10 from Maxim Integrated is a 3.3V precision voltage-monitoring microprocessor reset supervisor IC with pushbutton debounce, 2.80–2.97V V_CC trip point (10% tolerance), 350ms reset pulse width, and internal 5kΩ pull-up resistor. It operates from -40°C to +85°C in TO-92 package and is used in embedded microcontroller systems requiring reliable power-on and manual reset control.

For engineers reviewing the DS1233AZ-10 datasheet, DS1233AZ-10 pinout, DS1233AZ-10 application, or DS1233AZ-10 equivalent, key selection considerations include its 3.3V supply monitoring accuracy, integrated pushbutton debouncing, fixed 350ms reset timeout, TO-92 mechanical compatibility, and absence of external timing components.

Technical Context

The DS1233AZ-10 implements dual-function supervision: first, a precision temperature-compensated voltage comparator monitors V_CC against a 2.88V nominal threshold (±10%), asserting RESET when voltage falls below 2.80V; second, it detects and debounces an external pushbutton connected directly to the RESET pin using internal timing and edge detection logic.

Upon V_CC recovery, the device holds RESET active for 350ms (min 250ms, max 450ms) to ensure system stabilization; similarly, after pushbutton release, it generates a clean 350ms active-low reset pulse, eliminating need for external RC networks or firmware debounce routines.

Key Specifications

Pinout & Package

DS1233AZ-10 is supplied in a 3-pin TO-92 package (package code Q3+1), with leads arranged in straight-line configuration and pin 1 designated as GROUND per Maxim's official package drawing 21-0248.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T and TPS3808G12DBVR, the DS1233AZ-10 uniquely integrates both accurate 3.3V power monitoring and hardware pushbutton debounce in a 3-pin TO-92 package-reducing component count and eliminating layout dependencies associated with external timing or sensing networks.

Availability

DS1233AZ-10 is available at Aetrix Electronics and suitable for industrial control panels, medical handheld diagnostics, point-of-sale terminals, and smart energy meters requiring stable component supply and long-term manufacturability.

Supply support for DS1233AZ-10 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) is a semiconductor company specializing in analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The DS1233A family was designed specifically for cost-sensitive, high-reliability microprocessor reset supervision in 3.3V embedded systems-emphasizing integration, temperature stability, and mechanical simplicity over programmability.

FAQ

What is the exact V_CC trip voltage range for DS1233AZ-10?

The DS1233AZ-10 has a guaranteed V_CC trip point of 2.80V (min) to 2.97V (max) at +25°C, corresponding to ±10% tolerance around a 2.88V nominal threshold. This range is fully specified across -40°C to +85°C per Maxim's DS1233A datasheet revision 122001, page 4, DC Electrical Characteristics table.

Does DS1233AZ-10 require an external capacitor for pushbutton operation?

Yes, DS1233AZ-10 requires a capacitor between 100pF and 0.01μF connected from the RESET pin to ground for proper pushbutton debounce. The datasheet specifies this is mandatory for reliable edge detection; omission causes erratic or missed reset pulses. A minimum 500pF value is recommended if higher reset current is needed.

Can DS1233AZ-10 operate with supply voltages other than 3.3V?

Yes, DS1233AZ-10 supports V_CC from 1.2V to 5.5V, but its 2.80–2.97V trip window is optimized for 3.3V systems. At lower V_CC, the device remains functional but may assert reset prematurely; at higher V_CC, the trip point stays fixed-so it does not scale. Its specification is validated only for 3.3V ±10% operation.

Is DS1233AZ-10 pin-compatible with DS1233A-10 or DS1233Z-10?

Yes, DS1233AZ-10 is a direct replacement for DS1233A-10 and DS1233Z-10 in TO-92 package: all share identical pinout (GND–RST–V_CC), electrical specifications, and functional behavior. The "Z" suffix denotes tape-and-reel packaging per Maxim's ordering nomenclature, not a functional variant.

What is the maximum sink current capability of the DS1233AZ-10 RESET output?

The DS1233AZ-10 RESET output can sink up to +8mA while maintaining VOL ≤ 0.4V, as specified in the DC Electrical Characteristics table. This allows direct interfacing with standard CMOS and TTL reset inputs without external buffer stages, provided the target device's reset pin leakage and capacitance remain within compatible limits.