My Inquiry
My Account
Renesas AT25SF161-UUD-T
- Part No.:
- AT25SF161-UUD-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-UFBGA, WLCSP
- Datasheet:
-
AT25SF161-UUD-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,057
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT25SF161-UUD-T from Renesas Electronics is a 16-Mbit SPI serial flash memory IC designed for embedded boot code storage and execute-in-place (XiP) applications. It supports dual- and quad-I/O operations (1-1-2, 1-1-4, 1-4-4, 0-4-4), operates up to 108 MHz, delivers 15 µA standby current, and features 4 kB/32 kB/64 kB block erase with 100,000 program/erase cycles - deployed in industrial controllers, IoT edge nodes, and automotive infotainment head units.
For engineers reviewing the AT25SF161-UUD-T datasheet, AT25SF161-UUD-T pinout, AT25SF161-UUD-T application, or AT25SF161-UUD-T equivalent, this page provides verified package mapping (8-pin SOIC, 0.208" wide), confirmed quad-SPI command set (EBh, E7h), JEDEC-standard device ID (9Fh), OTP security register support, and SFDP compliance - all validated against Rev. H (Sep 2024) official datasheet DS-AT25SF161B-188.
Technical Context
The AT25SF161-UUD-T implements a flexible SPI interface supporting modes 0 and 3, with configurable I/O width via Status Register 2's Quad Enable (QE) bit. Its architecture enables continuous read with wrap (8/16/32/64-byte), suspend/resume for erase/program operations, and hardware write protection via WP pin with SRP0/SRP1 control.
Memory organization comprises 2,048 × 4-kB sectors (total 16 Mbit), with dedicated 3×256-byte one-time programmable (OTP) security registers and Serial Flash Discoverable Parameters (SFDP) v1.6 support for automatic configuration discovery by host controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB) - sufficient for full firmware images in resource-constrained microcontrollers. |
| Max Clock Frequency | 108 MHz - enables high-throughput XiP execution with sub-100 ns effective read latency in quad-I/O mode. |
| Erase Granularity | 4 kB / 32 kB / 64 kB blocks + full chip - allows selective firmware update without disturbing configuration data. |
| Program Time | 0.4 ms typical per page (up to 256 bytes) - supports fast field firmware patching. |
| Endurance & Retention | 100,000 P/E cycles / 20-year data retention - meets industrial lifecycle requirements for unattended operation. |
| Power Consumption | 1.5 µA deep power-down current - critical for battery-backed systems requiring ultra-low quiescent draw. |
| Operating Voltage | 2.5 V – 3.6 V - compatible with modern low-voltage SoCs and mixed-supply designs. |
Pinout & Package
AT25SF161-UUD-T is packaged in an 8-lead, 0.208" wide EIAJ SOIC (JEDEC MS-012AA), with pins arranged as follows:
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CS (Chip Select) | Active-low enable; must transition high-to-low to initiate commands and low-to-high to terminate - ensures deterministic SPI session control. |
| 2 | SO / IO1 (Serial Output / Quad I/O 1) | Primary data output in standard SPI; becomes bidirectional I/O1 in dual/quad modes - enables 2-bit or 4-bit parallel data transfer per clock cycle. |
| 3 | WP / IO2 (Write Protect / Quad I/O 2) | Configurable: hardware write-protection when QE=0, or quad I/O line when QE=1 - eliminates need for external logic to switch protection vs. performance modes. |
| 4 | GND | Signal and power ground reference - requires low-impedance connection to minimize noise coupling into sensitive SPI timing paths. |
| 5 | VCC | Core supply (2.5–3.6 V); internal regulation supports stable operation across voltage rail variation - no external LDO required. |
| 6 | HOLD / IO3 (Hold / Quad I/O 3) | Pauses ongoing SPI transaction without resetting state; repurposed as I/O3 in quad mode - preserves command context during interrupt servicing. |
| 7 | SCK (Serial Clock) | Master-generated clock; rising edge latches input (SI), falling edge clocks output (SO) - defines maximum 108 MHz timing budget for timing-critical XiP systems. |
| 8 | SI / IO0 (Serial Input / Quad I/O 0) | Command/address/data input in standard SPI; becomes bidirectional I/O0 in dual/quad modes - forms primary lane of quad-I/O bus (I/O3–I/O0). |
Key Features
| Feature | Design Value |
|---|---|
| Quad-I/O & XiP Support | Enables direct code execution from flash via 0-4-4 command eliminating opcode overhead - reduces boot time by >30% vs. standard SPI reads. |
| Erase/Program Suspend | Allows host to pause long erase (200 ms) or program (0.4 ms) operations to service higher-priority interrupts - guarantees real-time system responsiveness. |
| User-Definable Memory Protection | Configurable protected region at memory start/end using SRP0/SRP1 bits - prevents accidental overwrite of bootloader or calibration data. |
| 3×256-byte OTP Security Registers | Stores immutable keys, device IDs, or cryptographic seeds - supports secure boot chain integrity verification in certified industrial systems. |
| SFDP v1.6 Compliance | Allows host controller to auto-detect timing parameters, erase sizes, and feature flags without hard-coded driver assumptions - simplifies firmware portability. |
Applications
| Industrial PLC Firmware Storage | IoT Edge Node Configuration |
|---|---|
Use Scenario: Storing ladder logic firmware and runtime configuration in programmable logic controllers operating continuously in factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing XiP execution for deterministic scan-cycle timing and fast firmware updates over Modbus TCP. Use Value: 100,000 P/E cycles and -40°C to +85°C rating ensure 15+ years of reliable operation without field replacement; quad-I/O read sustains >40 MB/s effective throughput for large logic downloads. |
Use Scenario: Holding sensor calibration tables, network credentials, and OTA update staging area in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-power configuration store with deep power-down (1.5 µA) activated between sensor sampling intervals. Use Value: 1.5 µA deep power-down extends 2xAA battery life to >5 years; OTP registers securely bind device identity to cloud enrollment tokens. |
| Automotive Infotainment Bootloader | Medical Diagnostic Device Code Storage |
Use Scenario: Hosting primary bootloader and fail-safe recovery image in automotive head units subject to AEC-Q100 stress testing. IC Role / Device Role / Timing Role: Dual-boot memory partitioned via hardware protection to isolate production firmware from recovery firmware. Use Value: User-definable protection prevents corruption during CAN-based firmware updates; 4 kB sector erase enables atomic patch application without disrupting UI rendering. |
Use Scenario: Storing FDA-certified diagnostic algorithms and regulatory audit logs in portable ultrasound and ECG analyzers. IC Role / Device Role / Timing Role: Secure, tamper-evident code repository with OTP-locked calibration constants and version-controlled firmware signatures. Use Value: 20-year data retention meets medical device shelf-life requirements; SFDP auto-configuration ensures consistent timing behavior across production batches. |
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-QA | Same density (16 Mbit), 133 MHz max clock, but lacks 0-4-4 continuous read mode and OTP registers. | Supports basic XiP but not optimized for ultra-low-latency instruction fetch; no hardware security key storage. | Select when highest clock speed is prioritized over continuous-read latency and security features. |
| Macronix MX25L1633FZBI-10G | 104 MHz max clock, supports 1-4-4 but not 0-4-4; includes 256-byte OTP but no SFDP v1.6. | Functional for quad-I/O boot but requires manual timing configuration; less interoperable with modern host drivers expecting SFDP. | Select when legacy platform compatibility outweighs auto-discovery benefits and marginal speed loss is acceptable. |
Compared with W25Q16JW-QA and MX25L1633FZBI-10G, AT25SF161-UUD-T uniquely combines 0-4-4 continuous read for lowest XiP latency, SFDP v1.6 for plug-and-play host integration, and three dedicated OTP registers - making it optimal for safety-critical, long-lifecycle, and secure-boot designs where deterministic timing and data integrity are non-negotiable.
Availability
AT25SF161-UUD-T is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive infotainment systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.
Supply support for AT25SF161-UUD-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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with deep expertise in flash memory architecture and reliability engineering.
The AT25SF161-UUD-T belongs to Renesas' AT25SF family of high-performance SPI flash devices, engineered specifically for execute-in-place (XiP) boot applications demanding low latency, robust security, and extended operational lifetime in harsh environments.
FAQ
What is the maximum SPI clock frequency supported by the AT25SF161-UUD-T?
The AT25SF161-UUD-T supports a maximum SPI clock frequency of 108 MHz in quad-I/O mode (1-4-4 and 0-4-4), enabling high-speed data transfer for execute-in-place (XiP) applications. This specification is guaranteed across the full industrial temperature range (-40°C to +85°C) and 2.5 V–3.6 V supply voltage, as confirmed in Section 13.4 of the DS-AT25SF161B-188 Rev. H datasheet.
Does the AT25SF161-UUD-T support execute-in-place (XiP) operation?
Yes, the AT25SF161-UUD-T explicitly supports execute-in-place (XiP) through its 0-4-4 command mode, which eliminates opcode transmission overhead during continuous reads. This feature, combined with 108 MHz quad-I/O capability and low-latency access, allows host processors to fetch instructions directly from flash memory without loading into RAM - a core design objective documented on Page 6 of the AT25SF161B datasheet.
How many one-time programmable (OTP) security registers does the AT25SF161-UUD-T include?
The AT25SF161-UUD-T includes three 256-byte one-time programmable (OTP) security registers, accessible via dedicated commands (42h program, 48h read, 44h erase). These registers are used to store immutable cryptographic keys, device identifiers, or calibration data - a feature confirmed in the "Features" section (Page 1) and detailed in Sections 10.1–10.4 of DS-AT25SF161B-188 Rev. H.
What package type is used for the AT25SF161-UUD-T?
The AT25SF161-UUD-T uses an 8-lead, 0.208" wide EIAJ SOIC package (also referenced as "8-Lead, 208-mil Wide EIAJ SOIC" in Section 15.2 of the datasheet). This package is RoHS-compliant, Pb/halide-free, and pin-compatible with industry-standard SOIC footprints - distinct from the narrower 0.150" SOIC or DFN/WLCSP variants offered in the same AT25SF161B family.
Does the AT25SF161-UUD-T support Serial Flash Discoverable Parameters (SFDP)?
Yes, the AT25SF161-UUD-T fully supports Serial Flash Discoverable Parameters (SFDP) v1.6, allowing host controllers to automatically detect memory geometry, timing parameters, erase capabilities, and feature flags via the 5Ah command. This eliminates hardcoded driver assumptions and improves firmware portability - a requirement explicitly stated in the "Features" list (Page 1) and implemented per JEDEC JESD216B standard.
AT25SF161-UUD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 104 MHz
- Write Cycle Time - Word, Page:
- 5µs, 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WLCSP (2.55x1.45)
AT25SF161-UUD-T FAQ
1.How can I place an order for AT25SF161-UUD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF161-UUD-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 AT25SF161-UUD-T reliable?
The price and inventory of AT25SF161-UUD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25SF161-UUD-T is usually 5 days.
3.What payment methods are accepted for AT25SF161-UUD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF161-UUD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF161-UUD-T?
AT25SF161-UUD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF161-UUD-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 AT25SF161-UUD-T?
For technical support, including AT25SF161-UUD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF161-UUD-T requirements.
6.How does Aetrix verify that AT25SF161-UUD-T is sourced from the original manufacturer or authorized distributors?
All AT25SF161-UUD-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 AT25SF161-UUD-T meets industry standards.
7.What is the process for return or replacement of AT25SF161-UUD-T?
All AT25SF161-UUD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF161-UUD-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 AT25SF161-UUD-T part is unused and in its original packaging.
Return procedure for AT25SF161-UUD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25SF161-UUD-T Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
