Infineon Technologies S29AS008J70BFI030

Overview

S29AS008J70BFI030 from Infineon Technologies (formerly Cypress) is an 8 Mbit, 1.8 V-only boot sector Flash memory organized as 1M × 8-bit / 512K × 16-bit, featuring top/bottom configurable boot blocks, 70 ns access time, and industrial temperature range (–40°C to +85°C). It supports in-system programming/erasure via standard 1.8 V V_CC, includes Secured Silicon Sector with 128-word ESN, and is used for firmware storage in embedded controllers and boot code execution in power-constrained edge devices.

For engineers reviewing the S29AS008J70BFI030 datasheet, S29AS008J70BFI030 pinout, S29AS008J70BFI030 application, or S29AS008J70BFI030 equivalent, key selection criteria include boot sector architecture flexibility, JEDEC-compliant command set, hardware write protection (WP#), RY/BY# status signaling, and support for both x8/x16 bus modes in TSOP/FBGA packages.

Technical Context

This device implements a sector-erase Flash architecture with eight 8 KB + fifteen 64 KB sectors (byte mode) or eight 4 Kword + fifteen 32 Kword sectors (word mode), enabling selective reprogramming without disturbing adjacent firmware regions. It uses Fowler-Nordheim tunneling for erase and hot electron injection for program operations, with on-chip voltage generation eliminating need for external V_PP.

The internal state machine executes Embedded Erase and Embedded Program algorithms, automatically timing pulses and verifying cell margin. Erase Suspend/Erase Resume allows background read/program in non-erasing sectors, while Unlock Bypass reduces multi-word programming cycles from four to two writes per data word.

Key Specifications

Pinout & Package

Available in 48-pin TSOP (Type I) and 48-ball FBGA (VBK048, 8.15 mm × 6.15 mm) packages. Both variants share identical pin functions and logic behavior.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S29AS008J70BFI030, the S29GL032N90TFI020 offers greater density but demands 3.0 V infrastructure changes, while the MX29LV008CTTI-70G sacrifices security features and standardization for lower unit cost - making the S29AS008J70BFI030 optimal for new 1.8 V designs requiring secure, standards-compliant boot memory.

Availability

S29AS008J70BFI030 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive body control modules, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.

Supply support for S29AS008J70BFI030 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, sensor, and memory solutions for industrial, automotive, and IoT applications.

The S29AS008J belongs to Infineon's legacy Cypress Flash memory product line, engineered specifically for reliable, low-voltage boot code storage in resource-constrained embedded systems demanding high endurance and secure identity binding.

FAQ

What package types are offered for S29AS008J70BFI030?

The S29AS008J70BFI030 is manufactured in two RoHS-compliant packages: 48-pin TSOP Type I (standard thin small-outline package) and 48-ball FBGA (VBK048, 8.15 mm × 6.15 mm). Both packages support identical electrical functionality, pinout, and timing specifications per the Infineon datasheet 002-00870 Rev. *L.

Does S29AS008J70BFI030 support both x8 and x16 data bus configurations?

Yes - the device supports configurable bus width via the BYTE# pin: when BYTE# is high, it operates in 16-bit mode with DQ15–DQ0 active; when low, it operates in 8-bit mode with DQ7–DQ0 active and DQ15 repurposed as address bit A-1. This dual-mode capability simplifies migration between microcontroller families with differing data bus widths.

How is hardware write protection implemented on S29AS008J70BFI030?

Hardware write protection is implemented through the dedicated WP# pin, which - when asserted low - permanently locks the two outermost boot sectors (top or bottom, depending on configuration) regardless of software sector group protection status. The WP# pin has an internal pull-up, so it defaults to VIH (unprotected) when left unconnected, enabling flexible design-in without mandatory external pull-ups.

What is the purpose of the Secured Silicon Sector in S29AS008J70BFI030?

The Secured Silicon Sector is a dedicated 128-word (256-byte) region containing a factory-programmed or customer-programmable 8-word (16-byte) random Electronic Serial Number (ESN). It is accessed via a specific command sequence and can be permanently locked to provide immutable device identity for secure boot, anti-counterfeiting, and firmware licensing - independent of main array contents.