Analog Devices Inc./Maxim Integrated DS1233Z-15/T&R

Overview

DS1233Z-15/T&R from Analog Devices is a 5V microprocessor supervisory circuit in SOT-223 package that monitors VCC for 15% tolerance (4.0V–4.24V trip point), asserts reset for 350ms after power recovery or pushbutton release, and integrates internal 5kΩ pull-up and precision temperature-compensated voltage reference. It serves as a system-level power-on reset and manual reset controller in embedded microcontroller systems.

For engineers reviewing the DS1233Z-15/T&R datasheet, DS1233Z-15/T&R pinout, DS1233Z-15/T&R application, or DS1233Z-15/T&R equivalent, key selection criteria include VCC trip accuracy (±1.25V over temperature), guaranteed 350ms reset pulse width, pushbutton debounce capability, internal pull-up resistor value, and SOT-223 thermal performance in industrial temperature range.

Technical Context

The DS1233Z-15/T&R implements dual-function supervision: precise 5V supply monitoring using a temperature-compensated bandgap reference and comparator, and hardware-debounced pushbutton reset control with edge detection and 350ms active-low output hold. Its reset assertion logic is independent of software and ensures deterministic timing during brownout and manual reset events.

It operates across -40°C to +85°C with 50μA quiescent current, supports VCC from 1.2V to 5.5V, and requires no external components beyond a 100pF–0.01μF capacitor on RST for proper pushbutton operation. The device uses internal hysteresis and slew-rate insensitive detection to reject noise-induced false triggers.

Key Specifications

Pinout & Package

SOT-223 package with 4-pin configuration: compact surface-mount footprint (6.5mm × 3.5mm × 1.8mm), thermally enhanced design with exposed thermal pad, RoHS-compliant lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809TRD2+T and TPS3808G15DBVR, the DS1233Z-15/T&R uniquely combines fixed 15% 5V monitoring, hardware pushbutton debounce, and internal pull-up in a 4-pin SOT-223-offering lowest component count and fastest time-to-reset functionality for cost-sensitive industrial microcontroller systems.

Availability

DS1233Z-15/T&R is available at Aetrix Electronics and suitable for industrial PLC control modules, medical diagnostic handhelds, smart energy meters, and automotive body control modules requiring stable component supply and long-term production continuity.

Supply support for DS1233Z-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 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/T&R belongs to the EconoReset family of supervisory circuits designed specifically for cost-effective, reliable power-on and manual reset generation in resource-constrained microcontroller applications.

FAQ

What is the exact VCC trip voltage range for DS1233Z-15/T&R?

The DS1233Z-15/T&R has a guaranteed VCC trip point range of 4.0V to 4.24V at 25°C, corresponding to 15% tolerance around nominal 5V supply. This range is maintained with ±1.25V accuracy over the full -40°C to +85°C operating temperature range due to its internal temperature-compensated voltage reference. The DS1233Z-15/T&R does not support adjustable thresholds - it is factory-trimmed for this specific 15% window.

Does DS1233Z-15/T&R require an external capacitor on the RST pin?

Yes, DS1233Z-15/T&R requires a capacitor between 100pF and 0.01μF connected from RST to ground for proper pushbutton debounce operation. This capacitor stabilizes the RST line during mechanical switch transitions and enables the internal debouncing circuit to detect clean edges. Without it, the DS1233Z-15/T&R may generate multiple or missed reset pulses during button press/release cycles.

Can DS1233Z-15/T&R be used with 3.3V microcontrollers?

No, DS1233Z-15/T&R is specifically designed for 5V systems and monitors VCC relative to a 5V nominal reference. Its trip points (4.0V–4.24V) are incompatible with 3.3V supply rails. For 3.3V applications, Analog Devices offers the DS1233A-15 variant with 2.64V–2.80V trip range. Using DS1233Z-15/T&R on a 3.3V rail would result in permanent reset assertion since VCC remains below the minimum trip threshold.

What is the function of Pin 4 on DS1233Z-15/T&R?

Pin 4 on DS1233Z-15/T&R is a dedicated ground terminal, distinct from Pin 1. It provides a second low-impedance path to system ground, improving thermal dissipation through the SOT-223 exposed pad and reducing ground loop noise in electrically noisy environments. Both ground pins must be connected to the same ground plane for correct operation and specification compliance.

Is DS1233Z-15/T&R RoHS-compliant and lead-free?

Yes, DS1233Z-15/T&R is RoHS-compliant and lead-free, indicated by the "+" suffix in its full ordering designation (DS1233Z-15+/T&R). The device meets EU Directive 2011/65/EU requirements and uses matte tin lead finish. Its SOT-223 package is rated for 260°C reflow soldering per JEDEC J-STD-020, supporting standard lead-free assembly processes.