Renesas AT25PE16-SSHF-B

Overview

AT25PE16-SSHF-B from Adesto Technologies is a 16-Mbit serial Flash memory with sequential access architecture, supporting SPI modes 0 and 3, RapidS™ high-speed interface up to 85 MHz, 512/528-byte configurable page size, and dual 512/528-byte SRAM buffers for concurrent read-while-write operation - deployed in embedded firmware storage, voice/data logging, and boot code retention systems.

For engineers reviewing the AT25PE16-SSHF-B datasheet, AT25PE16-SSHF-B pinout, AT25PE16-SSHF-B application, or AT25PE16-SSHF-B equivalent, key selection considerations include its ultra-low 300nA deep power-down current, hardware write protection (WP), reset-controlled state machine, JEDEC-compliant ID read, and support for page/block/sector/chip erase granularity - critical for industrial IoT edge nodes and resource-constrained microcontroller-based designs.

Technical Context

The AT25PE16-SSHF-B implements a serial-peripheral-interface Flash memory architecture with two independent SRAM buffers enabling interleaved buffering during main array reprogramming. Its internal address counter supports seamless page-boundary crossing in continuous read modes without latency penalty.

It uses self-timed erase and program cycles with built-in error detection via EPE bit in Status Register, and supports four distinct continuous read opcodes (01h, 03h, 0Bh, 1Bh) optimized for low-power, standard, high-frequency, and ultra-high-frequency operation - each with defined max SCK limits (fCAR3, fCAR2, fCAR1, fCAR4).

Key Specifications

Pinout & Package

AT25PE16-SSHF-B is packaged in an 8-lead SOIC (0.208" wide), RoHS-compliant, green plastic body. Pin functions are electrically validated per DS-25PE16-143D–2/2022.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q16JVSNIQ and MX25L1606EM2I-12G, the AT25PE16-SSHF-B uniquely delivers simultaneous buffer access and main memory programming - eliminating software-managed double-buffering overhead - while offering the lowest deep-power-down current and fastest continuous read latency in its class.

Availability

AT25PE16-SSHF-B is available at Aetrix Electronics and suitable for industrial HMI boot memory, medical device configuration storage, voice/data logging, and firmware storage requiring stable component supply across extended product lifecycles.

Supply support for AT25PE16-SSHF-B 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, Renesas Electronics) specialized in low-power, high-performance serial Flash and non-volatile memory solutions for embedded and IoT applications.

The AT25PE16-SSHF-B belongs to the DataFlash-L® family, designed specifically for sequential-access, high-reliability data and code storage in space- and power-constrained systems - emphasizing continuous read performance, ultra-low standby current, and robust in-field programmability.

FAQ

What is the default page size configuration for the AT25PE16-SSHF-B?

The AT25PE16-SSHF-B ships with a default page size of 512 bytes, but supports a customer-selectable 528-byte page option. This configuration is fixed at manufacturing and cannot be changed in-circuit. The 528-byte variant accommodates industry-standard ECC byte overhead for enhanced reliability in mission-critical firmware storage applications, and both configurations maintain identical 4,096-page addressing structure. All timing specifications, including tEP (erase+program time), are validated for both page sizes in the official datasheet DS-25PE16-143D–2/2022.

Does the AT25PE16-SSHF-B support true read-while-write functionality?

Yes, the AT25PE16-SSHF-B supports true concurrent operation via two independent 512/528-byte SRAM buffers. While one buffer receives incoming data via Buffer Write command, the main memory array can simultaneously execute a Buffer-to-Main-Memory Page Program - enabling uninterrupted data streaming without CPU intervention. This differs from simple "read-while-erase" found in basic NOR Flash, as the AT25PE16-SSHF-B guarantees zero-latency overlap between input ingestion and persistent storage commit, verified under worst-case temperature and voltage conditions per datasheet Section 6.2.

What is the purpose of the RESET pin on the AT25PE16-SSHF-B?

The RESET pin on the AT25PE16-SSHF-B provides hardware-level state machine recovery: asserting it low immediately terminates any active program, erase, or read operation and forces the device into a known idle state. Unlike software resets, this action is asynchronous and guaranteed to clear internal command latches and status flags - critical for fail-safe recovery after power glitches or watchdog timeouts. The internal power-on reset circuit ensures safe initialization without external RC networks, and if unused, the pin must be externally pulled high per datasheet recommendation to prevent spurious resets.

How does the WP pin function on the AT25PE16-SSHF-B?

The WP (Write Protect) pin on the AT25PE16-SSHF-B provides hardware-enforced sector locking: when held low, it overrides all software-based protection commands and prevents program/erase operations on sectors designated in the Sector Protection Register. It operates independently of the internal protection logic and remains active even if the register is corrupted. The pin is internally pulled high, so leaving it unconnected defaults to unprotected mode - however, Adesto recommends external connection to VCC for robustness unless hardware-level write blocking is explicitly required in the system design.

Which continuous read opcode should be used for lowest power consumption in battery-operated devices?

For minimum power consumption, use the 01h opcode (Continuous Array Read – Low Power Mode) on the AT25PE16-SSHF-B. This mode supports clock frequencies up to fCAR3 (15 MHz) and requires no dummy bytes after the address sequence - reducing total SCK transitions and dynamic power draw. Combined with its 300 nA ultra-deep power-down current, this opcode enables ultra-low-energy data retrieval in intermittent-sensing applications such as wireless sensor nodes, where average current must remain below 1 µA over multi-year deployments.