Infineon Technologies S29AL008J70BFA023

Overview

S29AL008J70BFA023 from Infineon Technologies (formerly Cypress) is an 8 Mbit (1M × 8-bit / 512K × 16-bit), 3.0 V-only boot sector Flash memory with 55 ns access time, AEC-Q100 Grade 1 qualification (–40°C to +125°C), and flexible sector architecture including one 16 KB, two 8 KB, one 32 KB, and fifteen 64 KB sectors. It supports in-system programming via standard 3.0 V V_CC, features Secured Silicon Sector with 128-word electronic serial number, and is used in automotive engine control units for storing boot firmware and calibration data.

For engineers reviewing the S29AL008J70BFA023 datasheet, S29AL008J70BFA023 pinout, S29AL008J70BFA023 application, or S29AL008J70BFA023 equivalent, key selection criteria include boot-block configuration (top/bottom), sector protection granularity, CFI compliance for host auto-configuration, erase suspend capability for real-time firmware updates, and RY/BY# hardware status signaling.

Technical Context

The S29AL008J70BFA023 implements a command-register-driven state machine for embedded erase and program algorithms, eliminating need for external high-voltage supplies. It uses Fowler-Nordheim tunneling for erase and hot electron injection for programming, with internal voltage regulation enabling full 2.7–3.6 V operation.

Its dual-mode interface supports byte (DQ7–DQ0) and word (DQ15–DQ0) configurations via BYTE# pin, while hardware features - including WP# for boot-sector write protection, RESET# for immediate operation abort, and RY/BY# for cycle completion detection - enable robust integration into safety-critical automotive microcontroller boot paths.

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.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S29AL008J70TFI020 and MX29LV008CTTI-70G, the S29AL008J70BFA023 uniquely delivers BGA footprint efficiency, CFI-based software abstraction, and cryptographically bindable silicon identity - making it the sole choice for next-gen automotive and medical platforms requiring secure, scalable, and maintainable firmware storage.

Availability

S29AL008J70BFA023 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLCs, and telematics gateways requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant Flash memory.

Supply support for S29AL008J70BFA023 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 MCUs, and secure connectivity solutions with strong vertical integration in automotive and industrial markets.

The S29AL008J belongs to Infineon's automotive-qualified parallel NOR Flash product line, designed specifically for mission-critical boot code storage in engine, transmission, and ADAS control units where data integrity, endurance, and temperature resilience are non-negotiable.

FAQ

What boot sector configuration does S29AL008J70BFA023 support?

The S29AL008J70BFA023 supports both top-boot and bottom-boot configurations, selectable via hardware strapping or command sequence. The protected 16 KB boot sector resides either at the highest or lowest address range, enabling flexibility for different bootloader architectures - e.g., bottom-boot for legacy BIOS-style startup, top-boot for secure bootloaders that execute first from high memory.

How does the Secured Silicon Sector function in practice?

The Secured Silicon Sector is a dedicated 128-word (256-byte) region containing an 8-word (16-byte) factory-assigned random electronic serial number. Once programmed and locked - either at Infineon's facility or by the customer - it becomes permanently read-only. This enables cryptographic binding of firmware images to specific hardware units, satisfying UDS (Unified Diagnostic Services) security access requirements in ISO 14229-compliant automotive diagnostics.

Can S29AL008J70BFA023 be used in place of older S29AL008D devices?

Yes - the S29AL008J70BFA023 is manufactured on 110 nm process technology and explicitly designed as a drop-in replacement for the 200 nm S29AL008D, maintaining identical pinout, command set, timing parameters, and software compatibility. No hardware or firmware changes are required for migration, though updated datasheet Rev. *Q must be referenced for revised AC characteristics and thermal derating guidance.

What is the role of the BYTE# pin during initialization?

The BYTE# pin determines bus width mode at power-up or reset: pulled LOW selects 8-bit data bus (DQ7–DQ0 active); pulled HIGH selects 16-bit mode (DQ15–DQ0 active). Its state is latched internally and remains fixed until next reset - ensuring deterministic interface behavior without runtime reconfiguration. This eliminates ambiguity during early boot when MCU GPIOs may be floating.