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Renesas AT25DF161-SSH-T
- Part No.:
- AT25DF161-SSH-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25DF161-SSH-T.pdf
- Description:
- IC FLASH 16MBIT SPI 100MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,637
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Product details
Overview
AT25DF161-SSH-T from Adesto Technologies (now part of Dialog Semiconductor) is a 16-Mbit serial SPI Flash memory IC designed for code shadowing and mixed code/data storage in embedded systems. It operates from a single 2.7V–3.6V supply, supports RapidS (100 MHz) and standard SPI (85 MHz) modes, features 4/32/64-Kbyte uniform erase blocks, and delivers ≤5 ns clock-to-output timing - enabling fast boot and firmware update in resource-constrained industrial controllers and IoT edge nodes.
For engineers reviewing the AT25DF161-SSH-T datasheet, AT25DF161-SSH-T pinout, AT25DF161-SSH-T application, or AT25DF161-SSH-T equivalent, key selection criteria include its dual-input/dual-output read/write capability, sector lockdown for permanent read-only protection, 128-byte OTP security register, 100,000 program/erase endurance, and support for industrial temperature range (−40°C to +85°C) in 8-lead SOIC package.
Technical Context
The AT25DF161-SSH-T implements a flexible hierarchical erase architecture with four granularities (4/32/64-Kbyte blocks + full chip), enabling efficient code patching and data logging without over-erasing. Its SPI interface natively supports Modes 0 and 3, with dual-input programming (SO as input) and dual-output reading (SI as output) to double effective throughput at same clock frequency.
Hardware write protection via WP pin, individual sector protect/unprotect commands, and irreversible sector lockdown (via 33h opcode) provide layered security. The device integrates automatic program/erase failure detection, suspend/resume functionality, and deep power-down mode (5 µA typical) - all managed through standardized status register and command set compliant with JEDEC ID protocols.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 Mbyte) organized as 32 sectors × 64 Kbyte; enables compact firmware storage with minimal footprint. |
| Supply Voltage | 2.7V–3.6V single supply; eliminates need for charge pumps or auxiliary voltage rails in 3V systems. |
| Max Read Frequency | 100 MHz (RapidS mode); reduces boot time and improves real-time data access latency. |
| Read Latency | ≤5 ns clock-to-output (tV); ensures deterministic timing for high-speed microcontroller interfaces. |
| Erase Granularity | Uniform 4-Kbyte, 32-Kbyte, 64-Kbyte blocks + full chip; minimizes wasted space during partial updates. |
| Endurance & Retention | 100,000 program/erase cycles; 20-year data retention; suitable for field-upgradable firmware with long service life. |
| Power Consumption | 5 mA active read current (20 MHz); 5 µA deep power-down; critical for battery-powered edge devices. |
| Operating Temperature | −40°C to +85°C; validated for industrial control, automotive infotainment, and outdoor sensor nodes. |
Pinout & Package
AT25DF161-SSH-T uses an industry-standard 8-lead SOIC (208-mil wide) package. Pin functions are fully SPI-compatible with hardware write protection and hold control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates all commands and places SO in high-Z when deasserted. |
| SCK | Serial Clock | Controls data sampling; rising edge latches SI/SIO, falling edge clocks SO/SOI. |
| SI (SIO) | Serial Input / Dual-Output Read | Input for commands/addresses/data; becomes output (SIO) during Dual-Output Read for 2-bit/cycle transfer. |
| SO (SOI) | Serial Output / Dual-Input Program | Output for read data; becomes input (SOI) during Dual-Input Program for concurrent 2-bit/cycle loading. |
| WP | Write Protect | Hardware lock for protected sectors; low-active; internally pulled high; enables tamper-resistant firmware partitioning. |
| HOLD | Communication Pause | Temporarily suspends SPI transfer without deselecting device; preserves internal state during host interrupts. |
| VCC | Power Supply | 2.7V–3.6V main supply; powers core logic, memory array, and I/O buffers. |
| GND | Ground Reference | System ground return path; required for stable operation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Output Read Array (3Bh) | Delivers 2 bits per SCK cycle - doubles effective read bandwidth vs. standard SPI, accelerating firmware load and OTA updates. |
| Sector Lockdown (33h) | Makes any combination of 64-Kbyte sectors permanently read-only - prevents malicious or accidental overwrite of bootloader or crypto keys. |
| 128-byte OTP Security Register | Stores unique device serialization, ESN, or locked encryption keys - provides hardware-rooted identity for secure boot and provisioning. |
| Flexible Erase Architecture | 4/32/64-Kbyte uniform blocks eliminate wasted space in mixed code/data applications - avoids need for external EEPROM. |
| Program/Erase Suspend & Resume | Allows host to pause long erase cycles (e.g., 400 ms chip erase) to service higher-priority tasks - improves system responsiveness. |
| Deep Power-Down Mode (B9h) | Reduces current to 5 µA typical - extends battery life in always-on sensor nodes and wearable devices. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Configuration |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Non-volatile code storage with rapid boot and secure field updates; leverages 4-Kbyte block erase for subroutine-level patches and sector lockdown for bootloader protection. Use Value: Eliminates need for external EEPROM; 100,000-cycle endurance supports decades of firmware revisions; industrial temp rating ensures reliability in uncontrolled enclosures. |
Use Scenario: Holding device-specific configuration, calibration data, and OTA update staging area in battery-powered environmental sensors deployed outdoors. IC Role / Device Role / Timing Role: Mixed code/data storage with low-power deep-sleep operation; uses 32-Kbyte block erase for config updates and OTP register for unique device ID. Use Value: 5 µA deep power-down extends 10-year battery life; dual-output read accelerates sensor initialization; 20-year data retention guarantees calibration persistence. |
| Automotive Infotainment Bootloader | Medical Device Secure Boot |
Use Scenario: Storing primary bootloader and recovery image in head-unit systems requiring ASIL-B–compatible firmware integrity and fast cold-start performance. IC Role / Device Role / Timing Role: Trusted boot source with hardware write protection (WP pin) and global protect/unprotect for manufacturing programming; 5 ns tV ensures deterministic startup timing. Use Value: Sector lockdown prevents unauthorized modification of bootloader; 100 MHz RapidS read speeds reduce boot time below 500 ms threshold. |
Use Scenario: Securing cryptographic keys, digital certificates, and regulatory-compliant firmware signatures in portable diagnostic equipment subject to FDA cybersecurity requirements. IC Role / Device Role / Timing Role: Hardware-enforced secure storage; OTP register holds immutable ESN and keys; sector lockdown isolates crypto modules from application partitions. Use Value: Meets IEC 62304 and UL 60601-1 software lifecycle requirements; tamper-proof storage satisfies HIPAA/FDA audit trails for firmware provenance. |
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 W25Q16JVSSIQ | 16 Mbit, 3.3V, 133 MHz max read, no RapidS or dual-I/O; standard SPI only; lacks sector lockdown and OTP register. | Lower-cost option for basic code storage where advanced security and high-speed dual-mode operation are not required. | Select W25Q16JVSSIQ when budget constraints outweigh need for hardware lockdown or 100 MHz RapidS performance. |
| Macronix MX25L1606EM2I-12G | 16 Mbit, 3.3V, 85 MHz max read, supports Dual/Quad I/O; includes software protection but no hardware WP pin or sector lockdown. | Suitable for designs needing faster Quad I/O reads but not requiring permanent read-only sectors or OTP-based device identity. | Choose MX25L1606EM2I-12G if Quad SPI interface and JEDEC xSPI compatibility are priorities over hardware write lock and irreversible lockdown. |
Compared with W25Q16JVSSIQ and MX25L1606EM2I-12G, the AT25DF161-SSH-T uniquely combines RapidS 100 MHz operation, dual-input/dual-output capability, hardware WP-controlled sector locking, and a dedicated 128-byte OTP register - making it the only option among the three that supports both high-throughput firmware loading and cryptographically anchored device identity in a single 8-SOIC package.
Availability
AT25DF161-SSH-T is available at Aetrix Electronics and suitable for industrial PLCs, IoT edge nodes, automotive infotainment systems, and medical diagnostics equipment requiring stable component supply across extended product lifecycles.
Supply support for AT25DF161-SSH-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, acquired by Dialog Semiconductor in 2020, specialized in low-power, high-performance non-volatile memory and analog solutions for IoT and industrial markets.
The AT25DF161-SSH-T belongs to Adesto's DataFlash® family, engineered specifically for embedded systems demanding fast, secure, and energy-efficient serial Flash with fine-grained erase and hardware-enforced protection - targeting code+data co-storage in constrained environments.
FAQ
What is the maximum clock frequency supported by AT25DF161-SSH-T in RapidS mode?
The AT25DF161-SSH-T supports up to 100 MHz in RapidS mode using the 1Bh read opcode. This enables the fastest possible sequential read throughput, with clock-to-output latency limited to 5 ns. Standard SPI read (0Bh opcode) is rated to 85 MHz, while legacy 03h read operates up to 50 MHz - allowing design flexibility based on host controller capabilities and signal integrity constraints.
Does AT25DF161-SSH-T support hardware write protection, and how is it implemented?
Yes, AT25DF161-SSH-T implements hardware write protection via the dedicated WP (Write Protect) pin. When held low, it locks protected sectors against program and erase operations regardless of software commands. The WP pin is internally pulled high, so it may be left floating if unused - though external connection to VCC is recommended for noise immunity. This complements software-based sector protection and global protect/unprotect commands.
Can AT25DF161-SSH-T be used for secure key storage, and what feature enables this?
Yes, AT25DF161-SSH-T includes a 128-byte One-Time Programmable (OTP) Security Register specifically designed for secure key storage. Once programmed, OTP contents cannot be erased or rewritten - making it suitable for storing cryptographic keys, electronic serial numbers (ESN), or device-unique identifiers. This hardware-enforced immutability provides a root-of-trust foundation for secure boot and firmware authentication workflows.
What erase block sizes does AT25DF161-SSH-T support, and why does granularity matter?
AT25DF161-SSH-T supports uniform 4-Kbyte, 32-Kbyte, 64-Kbyte block erases plus full-chip erase. Fine 4-Kbyte granularity minimizes over-erasure when updating small firmware modules or configuration parameters - preserving data integrity in adjacent sectors. This eliminates wasted memory space common with larger-block Flash devices and reduces wear on unrelated code segments during partial updates.
Is AT25DF161-SSH-T compatible with standard SPI controllers, and which modes does it support?
Yes, AT25DF161-SSH-T is fully compatible with standard SPI controllers and supports SPI Modes 0 and 3. Both modes use rising-edge sampling and falling-edge output, differing only in SCK idle polarity. This broad compatibility ensures seamless integration with ARM Cortex-M, RISC-V, and legacy microcontrollers without requiring custom driver logic - while still enabling advanced features like dual-input programming and dual-output reading via dedicated opcodes.
AT25DF161-SSH-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 16Mbit
- Memory Organization:
- 2M x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 100 MHz
- Write Cycle Time - Word, Page:
- 7µs, 3ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25DF161-SSH-T FAQ
1.How can I place an order for AT25DF161-SSH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25DF161-SSH-T 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 AT25DF161-SSH-T reliable?
The price and inventory of AT25DF161-SSH-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25DF161-SSH-T is usually 5 days.
3.What payment methods are accepted for AT25DF161-SSH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25DF161-SSH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25DF161-SSH-T?
AT25DF161-SSH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25DF161-SSH-T 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 AT25DF161-SSH-T?
For technical support, including AT25DF161-SSH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25DF161-SSH-T requirements.
6.How does Aetrix verify that AT25DF161-SSH-T is sourced from the original manufacturer or authorized distributors?
All AT25DF161-SSH-T 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 AT25DF161-SSH-T meets industry standards.
7.What is the process for return or replacement of AT25DF161-SSH-T?
All AT25DF161-SSH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25DF161-SSH-T, 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 AT25DF161-SSH-T part is unused and in its original packaging.
Return procedure for AT25DF161-SSH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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