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Renesas AT25DL161-SSHN-B
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- Part No.:
- AT25DL161-SSHN-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25DL161-SSHN-B.pdf
- Description:
- IC FLASH 16MBIT SPI 100MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,812
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Product details
Overview
AT25DL161-SSHN-B from Renesas Electronics is a 16-Mbit serial Flash memory IC designed for code shadowing and secure data storage in 1.8 V embedded systems. It operates from 1.65 V to 1.95 V, supports SPI Modes 0/3 and RapidS™ up to 100 MHz, features 32 × 64-kB uniform sectors, and delivers 5 ns clock-to-output timing. It is used in industrial controllers requiring reliable firmware storage with sector-level protection.
For engineers reviewing the AT25DL161-SSHN-B datasheet, AT25DL161-SSHN-B pinout, AT25DL161-SSHN-B application, or AT25DL161-SSHN-B equivalent, key selection criteria include dual-I/O read/write capability, hardware write-protect (WP) pin control, OTP security register support, deep power-down current (8 µA), and industrial temperature range (–40 °C to +85 °C).
Technical Context
The AT25DL161-SSHN-B implements a flexible erase architecture with four granularities: 4-kB, 32-kB, 64-kB block erase, and full-chip erase - enabling efficient code patching and data logging without over-erasing. Its dual-input program and dual-output read modes double effective throughput versus standard SPI by transferring two bits per clock edge.
Protection is implemented via software-configurable sector lock/unlock, global protect/unprotect, hardware-controlled WP pin locking, and permanent sector lockdown with freeze option. A 128-byte OTP security register (64 B factory preprogrammed, 64 B user-programmable) supports device serialization and key storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB) organized as 32 sectors × 64 kB - enables modular firmware partitioning and isolated data logging regions. |
| Supply Voltage | 1.65 V – 1.95 V - compatible with 1.8 V core logic without level shifting or auxiliary supplies. |
| Max Clock Frequency | 100 MHz (RapidS™), 85 MHz (standard SPI) - reduces instruction fetch latency in real-time boot and update sequences. |
| Read Latency | 5 ns clock-to-output (tV) - ensures deterministic timing for time-critical boot code execution. |
| Erase Endurance | 100,000 cycles (–40 °C to +85 °C) - supports frequent field firmware updates in industrial gateways and PLCs. |
| Data Retention | 20 years - guarantees long-term integrity of calibration data, configuration profiles, and cryptographic keys. |
| Deep Power-Down Current | 8 µA typical - extends battery life in always-on IoT edge nodes during sleep states. |
Pinout & Package
AT25DL161-SSHN-B is packaged in an 8-lead SOIC (150-mil wide), RoHS-compliant, green package. Pin functions are validated per Renesas DS-AT25DL161-8795 Rev.L.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates command sequence on high-to-low transition and terminates on low-to-high - critical for multi-device SPI bus arbitration. |
| SCK | Serial Clock | Master-generated clock; rising edge latches SI input, falling edge clocks SO output - defines maximum interface speed and timing margin. |
| SI (SIO) | Serial Input / Dual-Output Data | Primary command/address/data input; becomes SIO output during Dual-Output Read - enables 2-bit-per-cycle reads for bandwidth-sensitive applications. |
| SO (SOI) | Serial Output / Dual-Input Data | Primary data output; becomes SOI input during Dual-Input Program - allows parallel 2-bit writes to accelerate page programming. |
| WP | Write Protect | Hardware lock control; low-active signal freezes sector protection state - prevents accidental firmware corruption during power transients. |
| HOLD | Communication Hold | Pauses ongoing SPI transfer without deselecting device; requires CS asserted and SCK low - preserves context during interrupt servicing. |
| VCC | Power Supply | 1.65–1.95 V supply; powers all internal logic and Flash array - eliminates need for charge pumps or external VPP. |
| GND | Ground Reference | System ground return path; required for stable I/O thresholds and noise immunity in mixed-signal PCB layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-I/O Read/Write | Enables 2-bit-per-clock transfers during Dual-Output Read and Dual-Input Program - cuts read/write time by ~50% vs. standard SPI at same frequency. |
| Uniform Sector Erase | Supports 4-kB, 32-kB, and 64-kB block erase - allows precise erasure of bootloader, application, and parameter sections without disturbing adjacent code. |
| Permanent Sector Lockdown | Freezable lockdown of any 64-kB sector to read-only - secures boot ROM, crypto keys, or calibration tables against runtime or malicious overwrite. |
| 128-byte OTP Security Register | 64 B factory-programmed (e.g., unique ID), 64 B user-programmable - provides tamper-resistant storage for ESN, device certificates, or symmetric keys. |
| Program/Erase Suspend | Allows interrupt-driven foreground tasks to pause background erase/program operations - essential for real-time OS coexistence. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Archiving |
|---|---|
|
Use Scenario: Storing and updating ladder logic firmware and I/O mapping tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with rapid sector erase and hardware write protection - ensures safe in-field updates without risking system crash. Use Value: 4-kB erase granularity minimizes downtime during partial firmware patches; WP pin prevents accidental overwrite during brownout conditions. |
Use Scenario: Archiving patient-specific calibration parameters, sensor offsets, and regulatory compliance logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, long-retention data logger with OTP register for device serialization - meets IEC 62304 traceability requirements. Use Value: 20-year data retention and permanent lockdown of calibration sectors guarantee audit-ready integrity across product lifecycle. |
| Smart Energy Meter Bootloader | Automotive Telematics OTA Module |
|
Use Scenario: Hosting secure bootloader and public-key verification routines in ANSI C12.22-compliant electricity meters with remote firmware upgrade capability. IC Role / Device Role / Timing Role: Trusted execution root with sector lockdown and OTP key storage - enforces chain-of-trust from reset vector. Use Value: Freeze-enabled lockdown of bootloader sector blocks unauthorized modification; 100,000 endurance supports lifetime field updates. |
Use Scenario: Storing signed firmware images and certificate revocation lists in cellular-connected vehicle telematics control units (TCUs). IC Role / Device Role / Timing Role: High-speed, protected code/data repository supporting dual-I/O reads for fast OTA image validation and decompression. Use Value: 100 MHz RapidS™ mode accelerates hash computation and signature verification; deep power-down (8 µA) extends battery backup runtime. |
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 W25Q16JW | 16 Mbit, 1.7–2.0 V supply, 133 MHz Quad SPI, no Dual-I/O, no sector lockdown freeze | Lacks permanent lockdown and RapidS™; supports QPI but not dual-I/O program | Select when quad-I/O bandwidth is prioritized over hardware-enforced read-only sectors. |
| Macronix MX25L1633F | 16 Mbit, 2.7–3.6 V supply, 104 MHz SPI, no OTP register, no deep power-down mode | Requires 3.3 V rail; lacks 8 µA deep power-down and 128-byte OTP security register | Select only in legacy 3.3 V designs where ultra-low sleep current and device serialization are non-critical. |
Compared with W25Q16JW and MX25L1633F, the AT25DL161-SSHN-B uniquely combines 1.8 V operation, dual-I/O acceleration, permanent sector lockdown, and OTP-based device identity - making it optimal for secure, battery-sensitive, and firmware-update-intensive industrial edge devices.
Availability
AT25DL161-SSHN-B is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics, smart energy meters, and automotive telematics requiring stable component supply, long-term manufacturability, and guaranteed RoHS-compliant sourcing.
Supply support for AT25DL161-SSHN-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
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, infrastructure, and IoT markets.
The AT25DL161-SSHN-B belongs to Renesas' serial Flash memory product line, engineered specifically for secure, low-voltage, high-reliability code and data storage in resource-constrained embedded systems operating across extended industrial temperatures.
FAQ
What voltage range does the AT25DL161-SSHN-B support?
The AT25DL161-SSHN-B operates from 1.65 V to 1.95 V - optimized for 1.8 V systems. It performs all read, program, and erase functions within this single supply range, eliminating the need for auxiliary voltage rails or charge pumps. This simplifies power design in space-constrained industrial and portable applications where the AT25DL161-SSHN-B is commonly deployed.
Does the AT25DL161-SSHN-B support true dual-I/O operation?
Yes, the AT25DL161-SSHN-B supports both Dual-Output Read (using SO and SI pins simultaneously) and Dual-Input Program (using SO and SI pins as inputs). This dual-lane capability doubles effective data throughput compared to standard SPI, reducing latency for firmware loading and configuration updates - a key advantage in time-sensitive applications using the AT25DL161-SSHN-B.
How many sectors does the AT25DL161-SSHN-B have, and what are their sizes?
The AT25DL161-SSHN-B contains 32 uniform sectors, each 64 kB in size, totaling 2 MB (16 Mbit). It also supports finer-granularity erases: 4-kB and 32-kB blocks. This hierarchical erase architecture allows precise, non-disruptive updates - for example, modifying a single communication stack module without affecting bootloader or calibration data stored elsewhere in the AT25DL161-SSHN-B array.
Can sectors be permanently locked on the AT25DL161-SSHN-B?
Yes, the AT25DL161-SSHN-B supports sector lockdown with a permanent freeze option. Any combination of its 64-kB sectors can be made irreversibly read-only via the Sector Lockdown Register and Freeze command. Once frozen, those sectors cannot be reprogrammed or erased - providing hardware-enforced protection for boot code, cryptographic keys, or regulatory calibration data stored in the AT25DL161-SSHN-B.
What is the purpose of the 128-byte OTP security register in the AT25DL161-SSHN-B?
The 128-byte OTP (One-Time Programmable) security register in the AT25DL161-SSHN-B consists of 64 bytes factory-programmed (e.g., unique device ID) and 64 bytes user-programmable. It is used for secure device serialization, Electronic Serial Number (ESN) storage, locked key material, or tamper-resistant configuration tokens - enhancing system-level security and traceability in deployments relying on the AT25DL161-SSHN-B.
AT25DL161-SSHN-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 16Mbit
- Memory Organization:
- 256 Bytes x 8192 pages
- Memory Interface:
- SPI
- Clock Frequency:
- 100 MHz
- Write Cycle Time - Word, Page:
- 8µs, 3ms
- Access Time:
- -
- Voltage - Supply:
- 1.65V ~ 1.95V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25DL161-SSHN-B FAQ
1.How can I place an order for AT25DL161-SSHN-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25DL161-SSHN-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 AT25DL161-SSHN-B reliable?
The price and inventory of AT25DL161-SSHN-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25DL161-SSHN-B is usually 5 days.
3.What payment methods are accepted for AT25DL161-SSHN-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25DL161-SSHN-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25DL161-SSHN-B?
AT25DL161-SSHN-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25DL161-SSHN-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 AT25DL161-SSHN-B?
For technical support, including AT25DL161-SSHN-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25DL161-SSHN-B requirements.
6.How does Aetrix verify that AT25DL161-SSHN-B is sourced from the original manufacturer or authorized distributors?
All AT25DL161-SSHN-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 AT25DL161-SSHN-B meets industry standards.
7.What is the process for return or replacement of AT25DL161-SSHN-B?
All AT25DL161-SSHN-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25DL161-SSHN-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 AT25DL161-SSHN-B part is unused and in its original packaging.
Return procedure for AT25DL161-SSHN-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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