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Renesas AT25PE20-SHN-B
- Part No.:
- AT25PE20-SHN-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25PE20-SHN-B.pdf
- Description:
- IC FLASH 2MBIT SPI 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,868
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Product details
Overview
AT25PE20-SHN-B from Adesto Technologies is a 2-Mbit serial Flash memory with SPI interface, 256/264-byte page architecture, RapidS™ high-speed operation up to 85 MHz, and ultra-low-power Deep Power-Down mode (300 nA typical). It serves as nonvolatile storage for firmware, configuration data, and voice/image assets in space-constrained embedded systems.
For engineers reviewing the AT25PE20-SHN-B datasheet, AT25PE20-SHN-B pinout, AT25PE20-SHN-B application, or AT25PE20-SHN-B equivalent, key selection criteria include its dual-page-size flexibility (256 vs. 264 bytes), integrated 256/264-byte SRAM buffer for E²PROM emulation, hardware write protection (WP), reset control (RESET), and industrial-temperature support (–40°C to +85°C).
Technical Context
The AT25PE20-SHN-B implements a sequential-access DataFlash-L® architecture with dedicated SRAM buffer and main memory array organized as 1,024 pages. It supports SPI modes 0 and 3, uses MSB-first data transfer, and employs self-timed erase/program cycles with status register monitoring (RDY/BUSY, EPE).
Its command set includes four Continuous Array Read variants (0Bh/03h/01h/E8h), Main Memory Page Read (D2h), Buffer Read (D4h/D1h), Buffer Write (84h), and three page-program variants (83h/88h/82h) with or without built-in erase-enabling robust in-system reprogramming without external high-voltage supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2,162,688 bits (2-Mbit), organized as 1,024 pages of 256 or 264 bytes |
| Supply voltage | 1.65 V to 3.6 V - enables direct interfacing with 1.8 V, 2.5 V, and 3.3 V logic domains |
| Max clock frequency | 85 MHz (RapidS™ mode) - supports high-throughput firmware loading and streaming |
| Read latency | 6 ns clock-to-output (tV) - minimizes wait states in time-critical read operations |
| Power-down current | 300 nA typical (Ultra-Deep Power-Down) - extends battery life in always-on sensor nodes |
| Endurance & retention | 100,000 program/erase cycles per page; 20-year data retention - suitable for field-upgradable devices |
| Operating temperature | –40°C to +85°C - certified for industrial-grade reliability without derating |
Pinout & Package
AT25PE20-SHN-B is packaged in an 8-lead SOIC (0.208" wide), with pins fully compatible across Adesto's AT25PE20 family variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates all commands on high-to-low transition and terminates on low-to-high |
| SO | Serial Output | Output-only data line; outputs data on falling edge of SCK; tri-states when CS is high |
| WP | Write Protect | Hardware lock for sector protection; overrides software protection when asserted low |
| GND | Ground | Reference return path for VCC and all I/O signals |
| VCC | Power Supply | Single 1.65–3.6 V supply for all operations - no auxiliary voltage rails required |
| RESET | Reset Input | Active-low asynchronous reset; terminates ongoing operations and returns state machine to idle |
| SCK | Serial Clock | Master-generated clock; latches SI on rising edge, clocks SO on falling edge |
| SI | Serial Input | Command/address/data input; ignored when CS is deasserted |
Key Features
| Feature | Design Value |
|---|---|
| Configurable page size | Factory-default 256-byte pages or customer-selectable 264-byte pages - optimizes density vs. ECC overhead |
| Dedicated SRAM buffer | 256/264-byte on-die buffer - enables atomic read-modify-write for byte-level E²PROM emulation |
| RapidS™ interface | 85 MHz max SCK with 6 ns tV - delivers >80 MB/s effective throughput for burst reads |
| Flexible erase granularity | Page (256/264 B), Block (2 KB), Sector (32 KB), or Chip (2 Mbit) - reduces wear and improves update efficiency |
| Security register | 128-byte factory-programmed unique ID - supports device authentication and secure boot binding |
Applications
| Industrial HMI Firmware Storage | Medical Sensor Configuration |
|---|---|
Use Scenario: Storing GUI assets, calibration tables, and localized language packs in panel-mounted HMIs with limited PCB area. IC Role / Device Role / Timing Role: Nonvolatile code and data storage with fast sequential read access via SPI. Use Value: 85 MHz RapidS™ read speed enables sub-100 ms firmware load; 256-byte pages align with typical display tile sizes. | Use Scenario: Retaining patient-specific calibration parameters and usage logs in portable ECG monitors powered by coin cells. IC Role / Device Role / Timing Role: Low-power persistent memory supporting infrequent writes and long-term data retention. Use Value: 300 nA Ultra-Deep Power-Down current extends battery life beyond 5 years; 20-year retention ensures data integrity over device lifetime. |
| Smart Meter Bootloader Storage | Automotive Telematics Log Buffer |
Use Scenario: Hosting field-upgradable bootloader images in ANSI C12.19-compliant electricity meters operating across –25°C to +70°C. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for critical boot code with hardware write protection. Use Value: WP pin + 128-byte security register prevent unauthorized firmware modification; industrial temp range ensures reliability in outdoor enclosures. | Use Scenario: Capturing CAN bus diagnostic events and GPS timestamps during vehicle crash events where power may be interrupted. IC Role / Device Role / Timing Role: High-endurance, fast-write memory for transient event logging with graceful power-loss recovery. Use Value: 100,000-cycle endurance and page-erase capability allow frequent small updates; buffer-to-memory programming ensures atomic log commits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q20EW | 2-Mbit SPI Flash with Quad I/O support; no integrated SRAM buffer; 104 MHz max clock (Quad mode) | Lacks built-in buffer for E²PROM emulation; requires external logic or firmware overhead for byte-alterability | Choose W25Q20EW only if Quad SPI bandwidth is required and buffer-based read-modify-write is unnecessary |
| Microchip SST25VF020B | 2-Mbit SPI Flash with 256-byte pages; no RapidS™; max 50 MHz clock; no Ultra-Deep Power-Down (1 µA standby) | Higher active and standby current; lacks hardware RESET and WP pins; no factory-unique ID | Choose SST25VF020B only for legacy designs where RapidS™ speed and ultra-low-power modes are not needed |
Compared with W25Q20EW and SST25VF020B, AT25PE20-SHN-B uniquely integrates a configurable SRAM buffer, 85 MHz RapidS™ performance, 300 nA power-down, and hardware RESET/WP - making it optimal for energy-sensitive, firmware-upgradable embedded systems requiring atomic data updates.
Availability
AT25PE20-SHN-B is available at Aetrix Electronics and suitable for industrial HMI firmware storage, medical sensor configuration, smart meter bootloader storage, automotive telematics log buffering, and portable instrumentation requiring stable component supply and long-lifecycle support.
Supply support for AT25PE20-SHN-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, a Renesas company) specialized in low-power, high-reliability nonvolatile memory and IoT interface solutions.
The AT25PE20-SHN-B belongs to the DataFlash-L® family, designed specifically for embedded systems needing sequential-access Flash with integrated buffer, rapid read speeds, and ultra-low-power operation in space- and energy-constrained environments.
FAQ
What is the default page size configuration for AT25PE20-SHN-B?
The AT25PE20-SHN-B ships with a default page size of 256 bytes. A customer-selectable 264-byte page option is available at order time and affects address mapping, dummy byte count in commands, and buffer addressing (BFA8–BFA0 vs. BFA7–BFA0). The selected page size is fixed per unit and cannot be changed in-circuit.
Does AT25PE20-SHN-B support true byte-level programming without erasing entire pages?
No - AT25PE20-SHN-B does not support true byte-level programming. However, its integrated 256/264-byte SRAM buffer enables efficient E²PROM emulation via a single-command read-modify-write sequence (opcode 82h), allowing logical byte alteration while physically programming full pages after internal erase.
What is the function of the RESET pin on AT25PE20-SHN-B, and is it mandatory to use?
The RESET pin on AT25PE20-SHN-B provides asynchronous hardware reset: a low level forces the device into idle state, terminating any ongoing operation. It is not mandatory - the device includes an internal power-on reset circuit. If unused, RESET should be externally pulled high per datasheet recommendation.
How does the WP pin interact with software-based sector protection on AT25PE20-SHN-B?
The WP pin on AT25PE20-SHN-B operates independently of software protection. When WP is asserted low, all sectors marked in the Sector Protection Register become immune to program/erase commands - even if the Enable Sector Protection command has not been issued. WP takes precedence and cannot be overridden by firmware.
Can AT25PE20-SHN-B be used in place of standard NOR Flash in existing SPI designs?
AT25PE20-SHN-B is pin-compatible with other 8-lead SOIC SPI Flash devices but differs in architecture: it uses sequential-access DataFlash-L® instead of random-access NOR. Command sets, timing, and page/sector layouts differ. Migration requires firmware updates to match AT25PE20-SHN-B's opcodes, address formats, and buffer-aware programming flow.
AT25PE20-SHN-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- -
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR (SLC)
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 85 MHz
- Write Cycle Time - Word, Page:
- 8µs, 3ms
- Access Time:
- 6 ns
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25PE20-SHN-B FAQ
1.How can I place an order for AT25PE20-SHN-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25PE20-SHN-B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT25PE20-SHN-B reliable?
The price and inventory of AT25PE20-SHN-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25PE20-SHN-B is usually 5 days.
3.What payment methods are accepted for AT25PE20-SHN-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25PE20-SHN-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25PE20-SHN-B?
AT25PE20-SHN-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25PE20-SHN-B order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT25PE20-SHN-B?
For technical support, including AT25PE20-SHN-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25PE20-SHN-B requirements.
6.How does Aetrix verify that AT25PE20-SHN-B is sourced from the original manufacturer or authorized distributors?
All AT25PE20-SHN-B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT25PE20-SHN-B meets industry standards.
7.What is the process for return or replacement of AT25PE20-SHN-B?
All AT25PE20-SHN-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25PE20-SHN-B, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT25PE20-SHN-B part is unused and in its original packaging.
Return procedure for AT25PE20-SHN-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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