STMicroelectronics ST7FL05Y0MAE

Overview

ST7FL05Y0MAE from STMicroelectronics is an automotive-grade 8-bit microcontroller featuring 1.5 Kbytes single-voltage XFlash, 128 bytes RAM, 128 bytes data EEPROM with 300K write/erase cycles, 8-bit ADC (5 channels), and dual timers (8-bit Lite Timer with watchdog + 12-bit Autoreload Timer with PWM). It operates from 3.0–5.5 V at up to 8 MHz and supports -40°C to +105°C ambient temperature in SO16 150mil package for engine control modules and body electronics.

For engineers reviewing the ST7FL05Y0MAE datasheet, ST7FL05Y0MAE pinout, ST7FL05Y0MAE application, or ST7FL05Y0MAE equivalent, key selection criteria include its automotive temperature rating, integrated SPI interface, high-sink I/O capability (20 mA on 6 pins), and In-Application Programming support for field firmware updates.

Technical Context

The ST7FL05Y0MAE implements an enhanced 8-bit ST7 core with 63 instructions, 17 addressing modes, and hardware 8×8 unsigned multiply. Its memory subsystem includes byte-erasable XFlash with read-out protection and 128-byte data EEPROM retaining data for 20 years at 55°C.

Clock management integrates a factory-trimmed internal RC oscillator (1 MHz ±2%), PLL ×8 multiplier for 8 MHz operation, and four power-saving modes (Halt, Active Halt, Wait, Slow). Peripheral control uses dedicated registers mapped to addresses 0000h–007Fh, including LTCSR, ATCSR, SPICR, and ADCCSR.

Key Specifications

Pinout & Package

ST7FL05Y0MAE is housed in a 16-pin Small Outline (SO16) package with 150 mil body width and standard JEDEC MS-012AC footprint. Pin pitch is 1.27 mm; thermal resistance θ_JA = 90°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ST7FL05Y0MAE, ST7FL05Y0M1 offers identical functionality in a mechanically distinct package, while ST7FL09Y0MAE provides expanded RAM for more demanding real-time tasks-neither replaces the original's optimized balance of cost, size, and automotive qualification.

Availability

ST7FL05Y0MAE is available at Aetrix Electronics and suitable for engine control units, body control modules, HVAC systems, and instrument cluster interfaces requiring stable component supply across extended automotive lifecycles.

Supply support for ST7FL05Y0MAE 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 automotive, industrial, and consumer markets.

The ST7 family delivers cost-optimized 8-bit MCUs targeting automotive body electronics and powertrain sub-systems, emphasizing robustness, low-power operation, and seamless integration with legacy vehicle networks.

FAQ

Is ST7FL05Y0MAE qualified for automotive applications?

Yes. ST7FL05Y0MAE is specified for operation from -40°C to +105°C and designed to meet AEC-Q100 stress test requirements for automotive grade 2 components. Its Flash memory retains data for 20 years at 55°C, and it includes built-in watchdog timer and power-on reset circuitry essential for safety-critical vehicle subsystems.

What programming interfaces does ST7FL05Y0MAE support?

ST7FL05Y0MAE supports In-Circuit Programming (ICP) and In-Application Programming (IAP) via its dedicated ICC interface using pins PA5 (ICCDATA) and PA6 (ICCCLK). No external programming voltage is required-programming occurs at standard VDD levels (3.0–5.5 V), enabling field firmware updates without device removal.

Can the internal RC oscillator replace an external crystal?

Yes. The factory-trimmed 1 MHz internal RC oscillator achieves ±2% accuracy over temperature and voltage, sufficient for non-timing-critical functions like UART baud generation or SPI clocking. For applications requiring tighter timing (e.g., CAN bus), the PLL ×8 multiplier can lock to an external 1 MHz resonator to generate a stable 8 MHz system clock.

How is ADC conversion triggered and read?

ADC conversion is initiated by writing to ADCCSR register bit ADON; completion is signaled by ADCCSR bit EOC. The 8-bit result is stored in ADCDR register and accessible via direct memory read. Five analog inputs (PB0–PB4) share the same ADC hardware, with channel selection controlled by ADCCSR bits CH0–CH2 before each conversion.