Analog Devices Inc./Maxim Integrated DS5000-32-16

Overview

DS5000-32-16 from Maxim Integrated is an 8-bit 8051-compatible microcontroller with 32 kB nonvolatile SRAM for program and data storage, 16 MHz maximum crystal frequency, and crashproof operation preserving all memory contents for 10 years without VCC at room temperature. It features on-chip full-duplex UART, two timer/event counters, 32 parallel I/O lines, and software security for encrypted execution - deployed in secure embedded systems requiring field-upgradable firmware and power-fail resilience.

For engineers reviewing the DS5000-32-16 datasheet, DS5000-32-16 pinout, DS5000-32-16 application, or DS5000-32-16 equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options - all grounded in Maxim's official DS5000(T) documentation and ordering data.

Technical Context

The DS5000-32-16 implements a CMOS 8051 core with object-code compatibility to industry-standard 8051 instruction set and pinout. Its internal memory architecture uses 32 kB of nonvolatile SRAM mapped across separate program and data address spaces, supporting up to 64 kB each via expanded bus mode.

It integrates hardware-level crashproofing: power-fail reset, early-warning power-fail interrupt, watchdog timer, and internal pull-down resistors on RST and EA pins. The device operates from 4.05 V to 4.65 V, draws 45.6 mA typical at 16 MHz, and supports serial bootstrap loading at 300–9600 bps using standard ASCII commands over UART.

Key Specifications

Pinout & Package

DS5000-32-16 is housed in a 40-pin dual in-line package (DIP) with 0.600-inch width, compliant with JEDEC MS-026. Pin functions align precisely with standard 8051 layout for drop-in replacement in legacy designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8051-compatible microcontroller applications.

Compared with DS5000T-32-16, DS5000-32-16 removes RTC circuitry to reduce cost and power while retaining identical crashproof memory and 8051 compatibility; versus DS89C450, it trades flash speed and USB for guaranteed decade-long data retention without batteries or supercaps.

Availability

DS5000-32-16 is available at Aetrix Electronics and suitable for secure industrial controllers, power-meter firmware platforms, and legacy system upgrade modules requiring stable component supply, long-term lifecycle support, and zero-power memory retention.

Supply support for DS5000-32-16 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 secure microcontroller solutions for industrial, automotive, and communications markets.

The DS5000(T) product line was designed specifically for applications demanding crashproof firmware persistence, field-upgradable security, and seamless 8051 migration - targeting metering, medical, and critical infrastructure systems.

FAQ

What is the primary function of the DS5000-32-16 in an embedded system?

The DS5000-32-16 serves as a secure, crashproof 8-bit microcontroller executing 8051-compatible firmware from 32 kB of nonvolatile SRAM. Its core function is to maintain full program and data integrity across power loss events - enabling reliable operation in utility meters, industrial controllers, and safety-critical devices where battery backup is impractical. DS5000-32-16 achieves this through integrated power-fail detection, watchdog supervision, and zero-power memory retention.

Does the DS5000-32-16 support in-system programming without external hardware?

Yes, the DS5000-32-16 supports in-system programming via its on-chip serial bootstrap loader. Using only three wires (RXD, TXD, GND), it accepts Intel HEX files at standard baud rates (300–9600 bps) without requiring a parallel programmer or external voltage programming supply. This capability is enabled by the DS5000-32-16's internal UART and dedicated loader command set (e.g., 'L' for load, 'V' for verify), making field firmware updates fully self-contained.

How does the DS5000-32-16 differ from the DS5000T-32-16 variant?

The DS5000-32-16 and DS5000T-32-16 share identical 32 kB nonvolatile SRAM, 16 MHz speed rating, pinout, and 8051 compatibility - but DS5000T-32-16 integrates a permanently powered real-time clock (RTC) with on-board crystal. The DS5000-32-16 omits RTC circuitry, reducing cost and power consumption while retaining all crashproof memory features. No other functional or electrical differences exist between the two parts.

What voltage range must be maintained to ensure reliable operation of the DS5000-32-16?

The DS5000-32-16 operates reliably within a supply voltage range of 4.05 V to 4.65 V at VCC. Its power-fail warning circuit triggers an interrupt when voltage drops below 4.15 V (typical), allowing firmware to execute a controlled save routine before reset occurs at ~4.05 V. Maintaining VCC above 4.05 V ensures correct timing, I/O drive strength, and NV SRAM write integrity - critical for DS5000-32-16's crashproof behavior.

Can the DS5000-32-16 replace a standard 8051 or 8031 microcontroller on an existing PCB?

Yes, the DS5000-32-16 is explicitly designed as a pin-compatible and timing-compatible replacement for industry-standard 8051 and 8031 microcontrollers. It matches the 40-pin DIP footprint, 8051 instruction set, and signal timing specifications - including ALE, PSEN, and bus strobe waveforms. When EA is tied to +5 V (as required for internal NV RAM), the DS5000-32-16 behaves identically to an 8031 with on-chip memory, enabling direct drop-in upgrades without PCB changes.