Infineon Technologies S29JL064J55TFA000

Overview

S29JL064J55TFA000 from Infineon Technologies (formerly Cypress) is a 64-Mb simultaneous read/write flash memory organized as 4M × 16-bit or 8M × 8-bit, operating at 3.0 V only with 55 ns access time. It features four-bank architecture enabling zero-latency concurrent read and program/erase operations, secured silicon region with factory-locked 16-byte ESN, and JEDEC-compliant CFI interface. Used in embedded boot code storage where deterministic latency and in-system reprogrammability are critical.

For engineers reviewing the S29JL064J55TFA000 datasheet, S29JL064J55TFA000 pinout, S29JL064J55TFA000 application, or S29JL064J55TFA000 equivalent, key selection criteria include simultaneous bank operation capability, 256-byte secured silicon sector lock status, 55 ns tACC timing, hardware write protection via WP#/ACC, and FBGA/TSOP package compatibility with legacy 48-pin footprints.

Technical Context

The S29JL064J55TFA000 implements a four-bank flash architecture-two 8-Mb banks with mixed 8 KB/64 KB sectors and two 24-Mb banks with uniform 64 KB sectors-enabling true background erase and program while reading from any non-busy bank. Its command set fully complies with JEDEC 42.4, supporting autoselect, CFI query, erase suspend/resume, and unlock bypass programming.

Hardware-level data protection includes low-VCC detection inhibiting writes during power transitions, RY/BY# status signaling, DQ7 polling, and DQ6/DQ2 toggle bits for real-time operation monitoring. The Secured Silicon Region supports either factory-programmed 16-byte ESN or customer one-time programmable lock, with DQ6 indicating lock origin (0 = factory, 1 = customer).

Key Specifications

Pinout & Package

Package: 48-ball Fine-pitch BGA (VBK048 footprint) - compatible with high-density PCB layouts and automated assembly processes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar flash memory applications.

Compared with S29JL064J70TFI000 and S29GL064S90TFI010, the S29JL064J55TFA000 uniquely delivers zero-latency concurrent operation, factory-locked ESN, and erase suspend-making it the sole option for real-time embedded systems requiring deterministic firmware update behavior without CPU stalls.

Availability

S29JL064J55TFA000 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive BCM boot code, medical imaging boot loaders, and network equipment configuration storage requiring stable component supply across multi-year production cycles.

Supply support for S29JL064J55TFA000 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 S29JL064J belongs to Infineon's legacy Cypress flash memory product line, designed specifically for deterministic, in-system reprogrammable boot storage in safety-critical and real-time embedded systems.

FAQ

What does "simultaneous read/write" mean for the S29JL064J55TFA000?

It means the device divides its memory into four independent banks, allowing read operations from any non-busy bank while program or erase executes in another. Only two banks operate concurrently, and there is zero latency between initiating a read and accessing valid data during background writes-critical for real-time firmware updates without CPU stalling.

How is the Secured Silicon Region used in practice?

The 256-byte Secured Silicon Region supports either factory-programmed 16-byte electronic serial numbers (ESNs) with permanent lock status verifiable via autoselect, or customer one-time programmable lock for proprietary keys. DQ6 indicates lock origin (0 = factory, 1 = customer), preventing substitution of factory-locked parts with customer-locked ones in secure supply chains.

Can the S29JL064J55TFA000 replace older S29JL064J variants in existing designs?

Yes-pin-compatible with all S29JL064J speed grades (55/60/70 ns) in both 48-ball FBGA and 48-pin TSOP packages, sharing identical command sets, sector maps, and electrical characteristics. No layout or firmware changes are needed when upgrading from slower variants to the 55 ns version for improved boot timing margin.

Does the device support both 8-bit and 16-bit data interfaces?

Yes-BYTE# pin selects 8-bit mode (DQ7–DQ0 active) or 16-bit mode (DQ15–DQ0 active). In 8-bit mode, DQ15 functions as A-1 (LSB address), enabling seamless integration with 8-bit microcontrollers while retaining full 64 Mb density through extended addressing.