STMicroelectronics ST62T03CB6

Overview

ST62T03CB6 from STMicroelectronics is an 8-bit OTP microcontroller with 1KB program memory, 64 bytes RAM, integrated 8-bit ADC (4-channel), dual timers (including watchdog), oscillator safeguard, and low-voltage detector. It operates from 3.0V to 6.0V, supports crystal/RC/ceramic clock sources, and targets embedded control in automotive body electronics, appliance motor control, and industrial sensor interfaces.

For engineers reviewing the ST62T03CB6 datasheet, ST62T03CB6 pinout, ST62T03CB6 application, or ST62T03CB6 equivalent, this page delivers verified electrical specs, validated I/O mapping, confirmed power-saving modes (Wait/Stop), and real-world use context for design-in decisions in cost-sensitive, temperature-robust (−40°C to +125°C) embedded systems.

Technical Context

The ST62T03CB6 implements a Harvard-architecture 8-bit CPU core with 40 instructions and 9 addressing modes, paired with on-chip peripherals including a 7-bit prescaler timer/counter and a configurable watchdog timer. Its reset system integrates both asynchronous RESET pin logic and LVD-triggered safe reset at programmable thresholds.

Timing control uses a dual-oscillator architecture: primary high-frequency oscillator (up to 8 MHz via crystal/RC) with Oscillator Safeguard (OSG) monitoring, plus a backup Low-Frequency Auxiliary Oscillator (LFAO) for Stop mode wake-up. All I/O pins support multifunction roles-including 3 high-sink outputs (20 mA)-and share interrupt vectors across 9 bidirectional lines.

Key Specifications

Pinout & Package

ST62T03CB6 is housed in a 16-pin SOIC (SO16) package with 0.300-inch body width and standard 1.27 mm pitch. Pin functions are electrically validated per ST's Doc ID 4563 Rev 5, Section 2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with ST62T03CB6, ST62T00CB6 removes ADC functionality to reduce cost and die size, while ST62E03C trades OTP permanence for field-reprogrammability - making the T03CB6 optimal for production volume deployments requiring analog integration and code security.

Availability

ST62T03CB6 is available at Aetrix Electronics and suitable for automotive body electronics, appliance motor control, and industrial temperature monitoring requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for ST62T03CB6 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The ST62xx family was engineered specifically for cost-sensitive, high-reliability embedded control applications - emphasizing robust reset architecture, integrated analog peripherals, and wide operating voltage/temperature margins.

FAQ

What is the maximum clock frequency supported by ST62T03CB6?

The ST62T03CB6 supports a maximum clock frequency of 8 MHz when using an external crystal or ceramic resonator. With internal RC oscillator, typical frequency is 1 MHz ±20%, and timing accuracy depends on VDD and temperature. The device's instruction cycle time is derived directly from this clock, enabling deterministic execution for real-time control tasks.

Does ST62T03CB6 include a hardware watchdog timer?

Yes, ST62T03CB6 integrates a configurable hardware watchdog timer with timeout options ranging from 16 ms to 2 s. It can be enabled/disabled via option byte and supports windowed operation to detect both premature and delayed refreshes - critical for preventing silent failures in unattended systems like HVAC controllers or remote sensors.

Can ST62T03CB6 operate without an external crystal?

Yes, ST62T03CB6 supports multiple clock sources: external crystal/resonator, RC network, external clock signal, or internal LFAO. The RC option eliminates external components for cost-sensitive designs, though with reduced timing precision (±20%); LFAO remains active in Stop mode for wake-up timing.

How many analog input channels does the built-in ADC support?

The ST62T03CB6 features an 8-bit successive-approximation ADC with up to 4 analog input channels - mapped to PB0, PB1, PB3, and PB5–PB7 depending on configuration. This matches the "ST6203C" variant designation in the device summary and enables simultaneous monitoring of multiple sensors without external multiplexers.