Renesas AT25PE16-SHF-T

Overview

AT25PE16-SHF-T from Adesto Technologies is a 16-Mbit serial Flash memory with SPI interface, RapidS™ high-speed operation up to 85 MHz, dual 512/528-byte SRAM buffers, and flexible erase granularity (page/4KB block/128KB sector/chip). It operates from a single 2.3V–3.6V supply and targets embedded firmware storage, voice/image buffering, and real-time data logging in industrial controllers.

For engineers reviewing the AT25PE16-SHF-T datasheet, AT25PE16-SHF-T pinout, AT25PE16-SHF-T application, or AT25PE16-SHF-T equivalent, key selection considerations include its continuous array read capability (up to 85 MHz), ultra-low 300nA deep power-down current, dual-buffer interleaved write architecture, and support for both default (512B) and customer-selectable (528B) page sizes.

Technical Context

The AT25PE16-SHF-T implements a sequential-access DataFlash-L® architecture with two independent 512/528-byte SRAM buffers enabling concurrent receive-and-program operation. Its SPI interface supports modes 0 and 3, with clock-to-output time of ≤6 ns and four distinct continuous read opcodes (01h, 03h, 0Bh, 1Bh) optimized for low-power, standard, high-frequency, and legacy timing.

Memory organization comprises 4,096 pages (512B or 528B each), organized into 16 sectors of 128KB, with programmable sector protection via hardware WP pin and software register. All erase/program cycles are self-timed, and the device includes a 128-byte factory-programmed security register containing a unique identifier.

Key Specifications

Pinout & Package

AT25PE16-SHF-T is packaged in an 8-lead SOIC (0.208" wide), RoHS-compliant, green package. Pin functions are electrically identical across SOIC and UDFN variants per datasheet DS-25PE16-143D.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25PE16-SHF-T, the W25Q16JVSSIQ offers higher clock speed but lacks dual-SRAM buffering and ultra-low deep power-down, while the MX25L1606EM2I-12G adds QPI support but omits the unique ID and 300nA power state - making AT25PE16-SHF-T optimal for battery-constrained, streaming-data, and security-critical embedded systems.

Availability

AT25PE16-SHF-T is available at Aetrix Electronics and suitable for industrial control firmware storage, battery-powered sensor data logging, and secure voice prompt buffering requiring stable component supply and long-term lifecycle support.

Supply support for AT25PE16-SHF-T 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

Adesto Technologies (now part of Dialog Semiconductor, part of Renesas Electronics) specialized in low-power, high-performance non-volatile memory and analog ICs for IoT and industrial applications.

The AT25PE16-SHF-T belongs to the DataFlash-L® family, designed specifically for sequential-access, high-reliability, ultra-low-power embedded storage where traditional parallel NOR/NAND interfaces are impractical.

FAQ

What is the maximum operating frequency of the AT25PE16-SHF-T during continuous array read?

The AT25PE16-SHF-T supports up to 85 MHz during RapidS™ high-frequency continuous array read (opcode 1Bh), delivering sustained throughput exceeding 8.5 MB/s. This is the highest supported clock rate for any read operation and is validated under VCC = 3.0V–3.6V and TA = −40°C to +85°C. The AT25PE16-SHF-T achieves this via optimized internal timing and low clock-to-output delay (tV ≤ 6 ns).

Does the AT25PE16-SHF-T support both 512-byte and 528-byte page sizes?

Yes, the AT25PE16-SHF-T supports user-configurable page size: 512 bytes is the factory-default configuration, while 528 bytes is a customer-selectable option enabled during manufacturing. The selected size applies uniformly to both main memory pages and SRAM buffers, and determines address bit allocation (21-bit vs. 22-bit addressing) and dummy byte requirements in command sequences.

How does the dual-SRAM buffer architecture of the AT25PE16-SHF-T improve system write performance?

The AT25PE16-SHF-T's two independent 512/528-byte SRAM buffers allow the host to load new data into one buffer while the other buffer's contents are being programmed into main memory - enabling true interleaved write operation. This eliminates write stall time in continuous data streams, such as real-time sensor logging or audio capture, and is confirmed in the datasheet's "Interleaving between both buffers can dramatically increase a system's ability to write a continuous data stream."

What is the purpose and electrical behavior of the WP pin on the AT25PE16-SHF-T?

The WP (Write Protect) pin on the AT25PE16-SHF-T is an active-low hardware lock that independently disables all program and erase operations on sectors designated in the Sector Protection Register - even if software protection is disabled. Internally pulled high, it may be left floating if unused, but Adesto recommends connecting it to VCC. When asserted (low), the AT25PE16-SHF-T ignores all program/erase commands and remains in idle state after CS deassertion.

Is the 128-byte security register on the AT25PE16-SHF-T writable or factory-programmed only?

The 128-byte security register on the AT25PE16-SHF-T is factory-programmed with a unique device identifier and is read-only - it cannot be modified by the user or host system. Access is provided via standard JEDEC Manufacturer and Device ID read commands, and the register contents are guaranteed unique per unit, supporting cryptographic device binding and anti-counterfeiting in certified medical or industrial applications.