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Renesas AT25SF161B-MHD-T
- Part No.:
- AT25SF161B-MHD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT25SF161B-MHD-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,995
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Product details
Overview
AT25SF161B-MHD-T from Renesas Electronics is a 16-Mbit SPI serial flash memory IC supporting dual I/O and quad I/O operations, with 108 MHz max clock frequency, 2.5–3.6 V supply range, and execute-in-place (XiP) capability for embedded boot and code storage applications.
For engineers reviewing the AT25SF161B-MHD-T datasheet, AT25SF161B-MHD-T pinout, AT25SF161B-MHD-T application, or AT25SF161B-MHD-T equivalent, key selection factors include quad-SPI timing compliance (1-4-4, 0-4-4), 4 kB/32 kB/64 kB erase granularity, OTP security registers, SFDP support, and low-power deep power-down mode (1.5 µA).
Technical Context
The AT25SF161B-MHD-T implements a flexible SPI interface supporting modes 0 and 3, with configurable I/O widths (1-1-1, 1-1-2, 1-1-4, 1-4-4, 0-4-4) and continuous read wrap (8/16/32/64-byte). Its internal architecture includes SRAM data buffers, Y/X decoders, and protection logic enabling non-volatile memory array control.
It features three status registers (SR1–SR3) with bit-assigned control over write enable, quad enable (QE), block protection, and volatile/non-volatile configuration. The device supports program/erase suspend/resume, deep power-down with ABh resume, and HOLD functionality for SPI transaction pausing without clock reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB), organized as 2,097,152 bytes for firmware, boot code, or configuration storage |
| Max Clock Frequency | 108 MHz - enables high-throughput XiP execution and fast firmware updates |
| Erase Granularity | 4 kB / 32 kB / 64 kB blocks and full-chip - balances code update flexibility with data integrity |
| Page Program Time | 0.4 ms typical - supports efficient incremental firmware patching |
| Deep Power-Down Current | 1.5 µA maximum - extends battery life in always-on IoT edge nodes |
| Data Retention | 20 years - ensures long-term reliability in industrial control and automotive infotainment |
| Endurance | 100,000 program/erase cycles - suitable for field-upgradable systems with frequent OTA updates |
Pinout & Package
AT25SF161B-MHD-T uses an 8-lead SOIC (0.208" wide, EIAJ standard) package. Pin functions are fully compatible across all supported packages (SOIC, DFN, WLCSP), with shared pin numbering and electrical behavior.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for SPI command initiation; must transition high-to-low to start and low-to-high to end operations |
| SCK | Serial Clock | Master-generated clock; rising edge latches SI input, falling edge clocks SO output |
| SI (I/O0) | Serial Input / Quad I/O Lane 0 | Primary command/address/data input; becomes bidirectional I/O0 during dual/quad read commands |
| SO (I/O1) | Serial Output / Quad I/O Lane 1 | Primary data output; becomes bidirectional I/O1 during dual/quad read commands |
| WP (I/O2) | Write Protect / Quad I/O Lane 2 | Configurable: hardware write-protection when QE=0, or I/O2 lane when QE=1; internally pulled high |
| HOLD (I/O3) | Hold / Quad I/O Lane 3 | Pauses ongoing SPI transfer without resetting state; becomes I/O3 in quad mode; internally pulled high |
| VCC | Power Supply | 2.5–3.6 V operation; requires external 10 kΩ pull-up on CS for reliable power-up sequencing |
| GND | Ground Reference | System ground connection; critical for noise immunity in high-speed SPI signaling |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O & XiP Support | Enables 0-4-4 continuous read mode for zero-command-overhead code execution directly from flash |
| Flexible Erase Architecture | Independent 4 kB, 32 kB, and 64 kB erase blocks allow selective firmware module updates without full reflash |
| Three 256-byte OTP Security Registers | Store immutable keys, certificates, or device identifiers; programmable only once per register |
| Serial Flash Discoverable Parameters (SFDP) | Standardized JEDEC register (5Ah) provides host with runtime-accessible timing, density, and feature metadata |
| Non-Volatile Memory Protection | User-definable protected region at memory start or end, controlled via WP pin or status register bits |
Applications
| Industrial PLC Firmware Storage | Automotive Infotainment Boot Memory |
|---|---|
|
Use Scenario: Storing and executing real-time control firmware in programmable logic controllers with periodic field updates. IC Role / Device Role / Timing Role: Primary boot memory and XiP code store; delivers deterministic instruction fetch latency under 108 MHz SPI clock. Use Value: 4 kB block erase enables modular firmware patching; 20-year data retention ensures multi-decade system deployment without refresh. |
Use Scenario: Hosting boot loader and OS kernel for head-unit microcontrollers requiring secure, fast startup. IC Role / Device Role / Timing Role: Execute-in-place (XiP) memory mapped to MCU address space; supports 0-4-4 quad-I/O for sub-100 ns instruction fetch. Use Value: Three OTP registers store cryptographic keys for secure boot validation; SFDP simplifies host driver auto-configuration. |
| IoT Edge Node Configuration Storage | Medical Device Parameter Archive |
|
Use Scenario: Persisting calibrated sensor offsets, network credentials, and user preferences in battery-powered wireless sensors. IC Role / Device Role / Timing Role: Low-power non-volatile storage with deep power-down mode (1.5 µA) activated between BLE transmissions. Use Value: 100,000 P/E cycles support daily OTA parameter updates over 27 years; WP pin enables hardware-level write lock during normal operation. |
Use Scenario: Archiving device calibration logs, usage history, and regulatory audit trails in Class II medical electronics. IC Role / Device Role / Timing Role: Tamper-resistant data archive with non-volatile protection and OTP-secured serial number binding. Use Value: Dual/quad I/O read modes accelerate log retrieval during diagnostics; JEDEC-standard ID (9Fh) ensures traceability in FDA-regulated BOMs. |
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 W25Q16JVSNIQ | 16 Mbit, 133 MHz max clock, 1.65–3.6 V supply, no OTP registers, different SFDP layout | Lacks 3×256-byte OTP security registers; supports faster clock but wider voltage tolerance | Select when higher speed and broader VCC range outweigh need for hardware-secured identity storage |
| Macronix MX25L1633FZBI-10G | 16 Mbit, 104 MHz max clock, 2.7–3.6 V supply, supports 1-1-4 only (no 0-4-4 XiP mode) | No continuous-read 0-4-4 command; lacks deep power-down (min 5 µA vs. 1.5 µA) | Select when cost sensitivity dominates and XiP performance or ultra-low standby current are not required |
Compared with W25Q16JVSNIQ and MX25L1633FZBI-10G, the AT25SF161B-MHD-T uniquely combines 0-4-4 XiP support, 1.5 µA deep power-down, and factory-programmable OTP registers-making it optimal for secure, battery-constrained, and deterministic-execution designs.
Availability
AT25SF161B-MHD-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive infotainment boot memory, and IoT edge node configuration storage requiring stable component supply across multi-year production cycles.
Supply support for AT25SF161B-MHD-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
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT markets.
The AT25SF161B-MHD-T belongs to Renesas' AT25SF family of SPI flash devices engineered for robust, low-power, and secure code and data storage in resource-constrained embedded systems.
FAQ
What is the operating voltage range for the AT25SF161B-MHD-T?
The AT25SF161B-MHD-T supports two supply configurations: 2.7 V to 3.6 V and 2.5 V to 3.6 V. This dual-voltage capability allows direct integration into both legacy 3.3 V systems and newer low-power 2.5 V domains without level-shifting. The AT25SF161B-MHD-T maintains full specification compliance-including 108 MHz operation and 1.5 µA deep power-down-across its entire rated voltage range.
Does the AT25SF161B-MHD-T support execute-in-place (XiP) operation?
Yes, the AT25SF161B-MHD-T explicitly supports XiP via its 0-4-4 quad-I/O read command (EBh), which eliminates opcode transmission overhead and enables continuous, high-bandwidth instruction fetch directly from flash. This capability is validated in the datasheet's Product Overview and timing diagrams (Figures 12–13), and is essential for reducing boot latency in microcontroller-based systems using the AT25SF161B-MHD-T as primary code memory.
How many one-time programmable (OTP) security registers does the AT25SF161B-MHD-T include?
The AT25SF161B-MHD-T includes three independent 256-byte OTP security registers, accessible via dedicated commands (42h/44h/48h/4Bh). Each register can be programmed once and retains data for 20 years. These registers are used for storing cryptographic keys, unique device IDs, or calibration secrets-functions confirmed in Section 10 of the AT25SF161B-MHD-T datasheet and distinct from standard memory array programming.
What erase block sizes are supported by the AT25SF161B-MHD-T?
The AT25SF161B-MHD-T supports four erase granularities: 4 kB (20h), 32 kB (52h), 64 kB (D8h), and full-chip (60h/C7h). Typical erase times are 50 ms (4 kB), 120 ms (32 kB), 200 ms (64 kB), and 5.5 s (full chip). This hierarchy enables precise firmware updates-such as patching a single driver module-without disturbing unrelated code or configuration data stored elsewhere in the AT25SF161B-MHD-T memory array.
Is the AT25SF161B-MHD-T compatible with standard SPI protocols?
Yes, the AT25SF161B-MHD-T is fully SPI-compatible, supporting modes 0 and 3 per JEDEC JESD251. It accepts standard opcodes (e.g., 03h for read array, 02h for page program) and extends compatibility with dual-output (3Bh), dual-I/O (BBh), quad-output (6Bh), and quad-I/O (EBh/E7h) variants. All timing parameters-including setup/hold and clock frequency-are defined relative to standard SPI waveforms in the AT25SF161B-MHD-T datasheet (Sections 7–8, Figures 40–41).
AT25SF161B-MHD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 16Mbit
- Memory Organization:
- 2M x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 108 MHz
- Write Cycle Time - Word, Page:
- 5µs, 5ms
- Access Time:
- 6 ns
- Voltage - Supply:
- 2.5V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (5x6)
AT25SF161B-MHD-T FAQ
1.How can I place an order for AT25SF161B-MHD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF161B-MHD-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 AT25SF161B-MHD-T reliable?
The price and inventory of AT25SF161B-MHD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25SF161B-MHD-T is usually 5 days.
3.What payment methods are accepted for AT25SF161B-MHD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF161B-MHD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF161B-MHD-T?
AT25SF161B-MHD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF161B-MHD-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 AT25SF161B-MHD-T?
For technical support, including AT25SF161B-MHD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF161B-MHD-T requirements.
6.How does Aetrix verify that AT25SF161B-MHD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF161B-MHD-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 AT25SF161B-MHD-T meets industry standards.
7.What is the process for return or replacement of AT25SF161B-MHD-T?
All AT25SF161B-MHD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF161B-MHD-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 AT25SF161B-MHD-T part is unused and in its original packaging.
Return procedure for AT25SF161B-MHD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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