Infineon Technologies S29AL008J55BFIR23

Overview

S29AL008J55BFIR23 from Infineon Technologies (formerly Cypress) is an 8 Mbit, 3.0 V-only boot sector Flash memory organized as 1M × 8-bit or 512K × 16-bit, featuring 55 ns access time, AEC-Q100 Grade 1 (–40°C to +125°C), and flexible sector architecture with one 16 KB, two 8 KB, one 32 KB, and fifteen 64 KB sectors. It supports in-system programming via standard 3.0 V VCC-no 5 V or 12 V required-and integrates hardware write protection, erase suspend/resume, and CFI compliance for automotive firmware storage.

For engineers reviewing the S29AL008J55BFIR23 datasheet, S29AL008J55BFIR23 pinout, S29AL008J55BFIR23 application, or S29AL008J55BFIR23 equivalent, key selection criteria include boot-block configuration (top/bottom), sector protection granularity, RY/BY# and RESET# hardware control timing, and compatibility with JEDEC single-power-supply Flash command sets in safety-critical embedded systems.

Technical Context

The S29AL008J55BFIR23 implements a command-driven state machine architecture that executes embedded program/erase algorithms with automatic pulse width control and margin verification. It uses Fowler-Nordheim tunneling for erase and hot electron injection for programming, enabling 1,000,000 program/erase cycles per sector and 20-year data retention.

Its dual-mode interface supports byte (DQ7–DQ0) and word (DQ15–DQ0) configurations via BYTE# pin, while hardware features-including WP#-controlled boot-sector lock, RY/BY# status signaling, and RESET#-initiated state reset-enable robust integration into automotive microcontroller boot paths requiring deterministic recovery and secure firmware update sequencing.

Key Specifications

Pinout & Package

Package: 48-ball Fine-pitch BGA (VBK048), 0.8 mm pitch, 8.15 mm × 6.15 mm × 1.00 mm body height.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar boot-sector Flash memory applications.

Compared with S29AL008J70TFIR20 and MX29LV008CTTI-55G, the S29AL008J55BFIR23 delivers superior automotive-grade reliability (AEC-Q100 Grade 1), integrated security (electronic serial number), and standardized configurability (CFI), making it optimal for new designs requiring long-term support and functional safety alignment.

Availability

S29AL008J55BFIR23 is available at Aetrix Electronics and suitable for automotive ECU firmware storage, industrial PLC program retention, and medical device boot code applications requiring stable component supply across extended product lifecycles.

Supply support for S29AL008J55BFIR23 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

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive ICs, and secure microcontrollers with emphasis on functional safety and reliability.

The S29AL008J belongs to Infineon's automotive-qualified parallel NOR Flash portfolio, engineered specifically for mission-critical boot memory in engine control, braking, and ADAS systems where deterministic timing, data integrity, and long-term endurance are non-negotiable.

FAQ

Is S29AL008J55BFIR23 pin-compatible with earlier S29AL008D devices?

Yes - the S29AL008J55BFIR23 maintains identical pinout and software command compatibility with the 200 nm S29AL008D, including TSOP and BGA packages. It is manufactured on 110 nm process technology but retains full electrical and mechanical backward compatibility for drop-in replacement in existing designs.

What is the function of the BYTE# pin, and how does it affect data bus width?

The BYTE# pin selects between x8 and x16 data bus modes: when HIGH, DQ15–DQ0 operate as a 16-bit data bus; when LOW, only DQ7–DQ0 are active for 8-bit operation. This allows seamless integration with both 8-bit and 16-bit microcontrollers without external multiplexing or glue logic.

How does the Secured Silicon Sector support device authentication in production?

The Secured Silicon Sector contains a factory-programmed or customer-programmable 8-word (16-byte) electronic serial number accessible only via a specific command sequence. Once locked, it cannot be altered, enabling unique device identification, firmware binding, and clone prevention in certified production environments.

Can WP# protect only the boot sector, or does it affect other sectors?

WP# exclusively protects the boot sector (16 KB)-either top or bottom depending on configuration-and has no effect on remaining sectors. Protection is hardware-based and active regardless of command state, ensuring immunity to software glitches or corrupted firmware that might otherwise disable logical write protection mechanisms.