My Inquiry
My Account
Renesas AT25SF161-SSHDHR-T
.jpg)
- Part No.:
- AT25SF161-SSHDHR-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25SF161-SSHDHR-T.pdf
- Description:
- IC FLASH 16MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,624
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT25SF161-SSHDHR-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 I/O (1-2-2) and quad I/O (1-4-4, 0-4-4) read modes, operates up to 108 MHz, delivers 15 µA standby current, and features 4 kB/32 kB/64 kB block erase with typical times of 50 ms / 120 ms / 200 ms - enabling fast firmware updates in industrial controllers.
For engineers reviewing the AT25SF161-SSHDHR-T datasheet, AT25SF161-SSHDHR-T pinout, AT25SF161-SSHDHR-T application, or AT25SF161-SSHDHR-T equivalent, key selection criteria include quad-SPI XiP support, OTP security registers, SFDP compliance, low-power deep power-down (1.5 µA), and flexible memory protection via WP pin and status register configuration.
Technical Context
The AT25SF161-SSHDHR-T implements a unified SPI interface supporting modes 0 and 3, with configurable I/O width (1-, 2-, or 4-line) selected dynamically via command opcode and status register QE bit. Its architecture includes dedicated SRAM data buffers, Y-gating logic, and dual-stage address latching to sustain high-speed continuous reads without command reissuance.
Memory operations are managed by on-die control and protection logic that handles erase suspend/resume, page programming (1–256 bytes), and security register access (3 × 256-byte OTP). Protection granularity spans full-chip, 64 kB, 32 kB, and 4 kB blocks, with non-volatile lock bits controlled via Status Register 2 and WP pin assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 MB) - sufficient for boot firmware + application code in resource-constrained microcontrollers. |
| Max Clock Frequency | 108 MHz - enables ≤9.3 ns per bit in quad I/O mode, reducing instruction fetch latency in XiP systems. |
| Erase Time (4 kB block) | 50 ms typical - allows rapid field firmware patching without long downtime in edge devices. |
| Page Program Time | 0.4 ms typical - supports efficient runtime parameter logging or OTA update staging. |
| Deep Power-Down Current | 1.5 µA maximum - extends battery life in always-on IoT sensors during idle periods. |
| Data Retention | 20 years - ensures long-term reliability for industrial equipment with 10+ year service life. |
| Endurance | 100,000 program/erase cycles - accommodates frequent firmware revision in test and calibration systems. |
Pinout & Package
AT25SF161-SSHDHR-T uses an 8-pin SOIC (0.208" wide, EIAJ standard) package with industry-standard pin mapping and lead-free, RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must transition high-to-low to initiate commands and low-to-high to terminate - critical for multi-device SPI bus arbitration. |
| SCK | Serial Clock | Master-generated clock; rising edge latches SI input, falling edge clocks SO output - timing-critical for 108 MHz operation. |
| SI (I/O0) | Serial Input / Quad I/O Line 0 | Primary command/address/data input; becomes bidirectional I/O0 in dual/quad modes - requires level-shifting if interfacing with 1.8 V hosts. |
| SO (I/O1) | Serial Output / Quad I/O Line 1 | Default data output; functions as I/O1 in dual/quad reads - high-impedance when CS is high to prevent bus contention. |
| WP (I/O2) | Write Protect / Quad I/O Line 2 | Configurable: hardware write lock for status registers when QE=0; I/O2 in quad mode when QE=1 - must not be driven during quad operations. |
| HOLD (I/O3) | Communication Hold / Quad I/O Line 3 | Pauses ongoing SPI transfer without resetting state; serves as I/O3 in quad mode - internal pull-up allows floating if unused. |
| VCC | Power Supply | 2.5–3.6 V operation - compatible with both 2.5 V and 3.3 V system rails; decoupling capacitor required per datasheet layout guidelines. |
| GND | Ground Reference | System ground return path; must be low-impedance and co-located with VCC decoupling for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O & XiP Support | Enables 0-4-4 continuous read mode - eliminates opcode overhead, achieving sustained bandwidth >40 MB/s at 108 MHz for real-time code execution. |
| Flexible Erase Architecture | Independent 4 kB, 32 kB, 64 kB, and full-chip erase - permits selective firmware module updates without disturbing calibration data or bootloader. |
| 3×256-byte OTP Security Registers | Immutable storage for cryptographic keys or device-specific identifiers - prevents cloning and supports secure boot chain verification. |
| SFDP Compliance | Standardized parameter table accessible via 5Ah command - enables automatic driver configuration in Linux MTD and RTOS flash abstraction layers. |
| User-Definable Memory Protection | Configurable protected region at memory start or end via status register bits - safeguards bootloader or factory calibration data from accidental overwrite. |
Applications
| Industrial PLC Firmware Storage | Automotive ADAS Boot Memory |
|---|---|
|
Use Scenario: Storing and executing boot firmware for programmable logic controllers operating in harsh temperature environments (-40°C to 85°C). IC Role / Device Role / Timing Role: Primary non-volatile code storage with execute-in-place capability, directly feeding instructions to ARM Cortex-M7 core. Use Value: 108 MHz quad I/O read speed reduces boot time by >35% versus legacy SPI flash; 20-year data retention ensures firmware integrity over PLC lifetime. |
Use Scenario: Hosting safety-critical boot image and sensor calibration tables for automotive camera processing modules. IC Role / Device Role / Timing Role: Secure boot memory with OTP registers storing asymmetric keys for ECDSA signature verification. Use Value: Hardware write protection (WP pin + status register lock) prevents unauthorized firmware modification; 100K endurance supports repeated calibration updates. |
| Medical Imaging Device Configuration | Smart Grid Communication Module |
|
Use Scenario: Storing FPGA configuration bitstreams and operational parameters in portable ultrasound systems requiring low power and high reliability. IC Role / Device Role / Timing Role: Dual I/O (1-2-2) configuration memory accessed during FPGA initialization sequence. Use Value: 15 µA standby current extends battery runtime between clinical sessions; SFDP enables automatic bitstream loader configuration across product variants. |
Use Scenario: Firmware storage for DLMS/COSEM-compliant smart meter communication modules deployed in utility substations. IC Role / Device Role / Timing Role: Field-upgradable application code memory with deep power-down mode activated during grid sleep cycles. Use Value: 1.5 µA deep power-down current minimizes parasitic drain on supercapacitor backup; 4 kB block erase enables incremental firmware patches without full reflash. |
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, 1.65–3.6 V supply, no OTP registers, no SFDP v1.6 support. | Lacks hardware security features; suitable for cost-sensitive consumer applications without secure boot requirements. | Select when absolute lowest BOM cost is prioritized and security features are handled externally. |
| Macronix MX25L1633FZBI-10G | 16 Mbit, 104 MHz max, 2.7–3.6 V only, supports 1-1-4 but not 0-4-4 continuous read mode. | Lower XiP performance due to missing 0-4-4 mode; no deep power-down (min 5 µA vs. 1.5 µA). | Choose where existing PCB layout uses identical SOIC-8 footprint and 104 MHz bandwidth suffices. |
Compared with W25Q16JVSNIQ and MX25L1633FZBI-10G, the AT25SF161-SSHDHR-T delivers superior XiP throughput via 0-4-4 mode, lower deep power-down current for battery-backed systems, and integrated OTP security - making it optimal for industrial and automotive designs requiring verified boot and extended service life.
Availability
AT25SF161-SSHDHR-T is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS modules, medical imaging systems, and smart grid infrastructure requiring stable component supply and long-term lifecycle support.
Supply support for AT25SF161-SSHDHR-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 AT25SF161-SSHDHR-T belongs to Renesas' AT25SF family of SPI flash devices engineered specifically for high-reliability embedded boot and XiP applications demanding low power, security, and fast random access.
FAQ
What voltage range does the AT25SF161-SSHDHR-T support?
The AT25SF161-SSHDHR-T supports two supply ranges: 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 circuitry - a key advantage for mixed-rail embedded designs where the AT25SF161-SSHDHR-T serves as shared boot memory.
Does the AT25SF161-SSHDHR-T support execute-in-place (XiP) operation?
Yes, the AT25SF161-SSHDHR-T explicitly supports XiP through three hardware-enabling features: quad-SPI (1-4-4) for 4-bit-per-cycle reads, continuous read mode (0-4-4) eliminating opcode overhead, and 108 MHz maximum clock frequency. These allow the host processor to fetch instructions directly from flash with minimal latency - a confirmed capability documented in the AT25SF161-SSHDHR-T datasheet Section 1 and validated in Renesas reference designs.
How many one-time programmable (OTP) security registers does the AT25SF161-SSHDHR-T include?
The AT25SF161-SSHDHR-T includes three 256-byte one-time programmable (OTP) security registers, totaling 768 bytes of immutable storage. These registers are used for cryptographic keys, unique device identifiers, or secure boot manifests - and once programmed, cannot be erased or rewritten, providing tamper-resistant storage essential for certified industrial and automotive applications using the AT25SF161-SSHDHR-T.
What is the typical erase time for a 4 kB block on the AT25SF161-SSHDHR-T?
The typical erase time for a 4 kB block on the AT25SF161-SSHDHR-T is 50 ms, as specified in the official Renesas datasheet (DS-AT25SF161B-188, Rev. H, page 1). This value is measured under standard conditions (VCC = 3.0 V, TA = 25°C) and enables rapid field firmware updates - for example, rewriting a bootloader partition in under 60 ms, which is critical for zero-downtime maintenance in AT25SF161-SSHDHR-T-based industrial gateways.
Is the AT25SF161-SSHDHR-T compliant with Serial Flash Discoverable Parameters (SFDP)?
Yes, the AT25SF161-SSHDHR-T implements JEDEC JESD216-compliant Serial Flash Discoverable Parameters (SFDP) accessible via command 5Ah. This standardized parameter table allows host software to auto-detect memory geometry, timing parameters, and feature support - eliminating hardcoded driver assumptions and simplifying porting across platforms using the AT25SF161-SSHDHR-T, such as Linux MTD subsystems and bare-metal bootloaders.
AT25SF161-SSHDHR-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 - 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-SOIC
AT25SF161-SSHDHR-T FAQ
1.How can I place an order for AT25SF161-SSHDHR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25SF161-SSHDHR-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-SSHDHR-T reliable?
The price and inventory of AT25SF161-SSHDHR-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-SSHDHR-T is usually 5 days.
3.What payment methods are accepted for AT25SF161-SSHDHR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25SF161-SSHDHR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25SF161-SSHDHR-T?
AT25SF161-SSHDHR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25SF161-SSHDHR-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-SSHDHR-T?
For technical support, including AT25SF161-SSHDHR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25SF161-SSHDHR-T requirements.
6.How does Aetrix verify that AT25SF161-SSHDHR-T is sourced from the original manufacturer or authorized distributors?
All AT25SF161-SSHDHR-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-SSHDHR-T meets industry standards.
7.What is the process for return or replacement of AT25SF161-SSHDHR-T?
All AT25SF161-SSHDHR-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25SF161-SSHDHR-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-SSHDHR-T part is unused and in its original packaging.
Return procedure for AT25SF161-SSHDHR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25SF161-SSHDHR-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…
