AT25SF041B-SSHD-B - 4Mbit SPI/Quad-I/O Flash, 108MHz, 8-SOIC | Renesas
부품 번호: AT25SF041B-SSHD-B ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $0.62 | $0.62 |
| 10 | $0.55 | $5.50 |
| 100 | $0.46 | $46.00 |
| 500 | $0.39 | $195.00 |
| 1,000 | $0.33 | $330.00 |
| 5,000 | $0.28 | $1,400.00 |
AT25SF041B-SSHD-B 개요
A serial NOR Flash is a type of non-volatile memory that uses a low pin-count synchronous serial protocol (SPI) instead of a parallel address/data bus. It belongs to the hierarchy NOR Flash -> Flash memory -> non-volatile memory -> semiconductor memory IC. The SPI interface reduces PCB routing, package size, and power consumption versus parallel NOR, while providing fast random-read access for code-storage and data-logging roles. The "B" silicon revision of the AT25SF family reduces the minimum operating voltage to 2.5V (down from 2.7V on the legacy AT25SF041) and adds Execute-in-Place (XiP) support for direct code execution from flash.
Key features include 4 Mbit density (512 KB user space), single/dual/quad SPI modes, 108 MHz maximum clock in Quad-I/O mode, page program up to 256 bytes, sector erase 4 KB and block erase 32 KB / 64 KB, >100 K endurance cycles per sector, >20 year data retention, and a deep power-down current of typically <1 µA. The device supports JEDEC-standard 0x9D, 0x44, 0x5D manufacturer/device IDs for software compatibility.
Internally, the AT25SF041B uses a NOR cell array with a serial command state machine, on-chip page buffer, and status register. The 2.5V–3.6V single supply simplifies integration with 3.3V systems, while built-in ECC and write-protect logic safeguard against accidental modification. SPI modes 0 and 3 are supported, making the part interoperable with virtually any MCU or SoC SPI master.
Typical applications include firmware storage for IoT nodes, boot flash for microcontrollers, data logging for industrial sensors, configuration parameter storage in home appliances, and display drivers in HMI panels. Designers choose the AT25SF041B-SSHD-B when they need reliable 4 Mbit code/data storage in a standard 8-SOIC footprint compatible with millions of off-the-shelf reference designs.
When designing with this part, place a 100 nF decoupling capacitor within 3 mm of the VCC pin and route SCK/MOSI/MISO away from switching nodes. The HOLD and WP pins should be tied high (inactive) for Quad-I/O mode, and CS must be pulled high during power-up to prevent spurious writes.
This page synthesizes distributor stock levels, drop-in alternatives from the same AT25SF family and competitor 4-Mbit SPI NOR devices, and practical design notes not found in the standalone manufacturer datasheet.
드롭인 대체품: AT25SF041B-SSHD-B — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: AT25SF041B-SSHD-B (동일 폼 팩터 및 풋프린트) — 차이점: Package, Supply Voltage (VCC), Memory Type, Operating Temperature, Interface.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
AT25SF041-SSHD-B
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AT25SF041B-SSHB-T
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AT25DF081A-SH-B
✅ 드롭인✓ 재고 있음
$0.58 / 개
데이터시트 보기 →AT25DF641A-SH-B
✅ 드롭인✓ 재고 있음
$1.55 / 개
데이터시트 보기 →W25Q40CLSNIG
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MX25L4006EM2I-12G
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AT25SF041B-SSHD-B 최대 정격 & 전기적 특성
| 메모리 유형 | Non-Volatile NOR Flash |
| 메모리 크기 | 4 Mbit (512 Kbit x 8 / 512 KB) |
| Memory Organization | 512K x 8 |
| 인터페이스 유형 | SPI (Single/Dual/Quad I/O) |
| 최대 클록 주파수 | 108 MHz (Quad I/O) |
| Supply Voltage (VCC) | 2.5 V to 3.6 V |
| Deep Power-Down Current | Typically <1 uA |
| Page Size | 256 bytes |
| Sector Erase Size | 4 KB |
| Block Erase Sizes | 32 KB and 64 KB |
| Program/Erase Endurance | >100,000 cycles per sector |
| Data Retention | >20 years |
| 동작 온도 | -40 C to +85 C |
| 패키지 | 8-SOIC (0.154", 3.90 mm width) |
| 실장 유형 | Surface Mount |
| Lead-Free / RoHS | Lead-Free, RoHS Compliant |
| Manufacturer | Renesas Electronics Corporation (formerly Dialog Semiconductor / Adesto) |
| SPI Modes Supported | Mode 0 and Mode 3 |
| JEDEC IDs | Manufacturer 0x9D / Device IDs 0x44, 0x5D (per datasheet) |
AT25SF041B-SSHD-B 핀 구성
| 핀 1 | CS — Chip Select, active low. Pulled high during power-up to prevent accidental writes. |
| 핀 2 | SO — Serial Data Out (MISO). Used as data output in single SPI mode; repurposed as IO1 in Quad I/O mode. |
| 핀 3 | WP — Write Protect, active low. Tie high to disable hardware write protection. Used as IO2 in Quad I/O mode. |
| 핀 4 | GND — Ground reference. |
| 핀 5 | SI — Serial Data In (MOSI). Used as data input in single SPI mode; repurposed as IO0 in Quad I/O mode. |
| 핀 6 | SCK — Serial Clock. SPI master clock input, up to 108 MHz in Quad I/O mode. |
| 핀 7 | HOLD — Hold, active low. Tie high in normal use. Used as IO3 in Quad I/O mode. |
| 핀 8 | VCC — Power supply, 2.5 V to 3.6 V. Decouple with 100 nF ceramic capacitor placed within 3 mm of the pin. |
일반적인 애플리케이션
AT25SF041B-SSHD-B 적합 용도: 6 애플리케이션s: Firmware Storage for IoT Nodes, MCU Boot Flash / Execute-in-Place (XiP), Industrial Sensor Data Logging, Consumer HMI / Display Configuration Storage, Automotive Infotainment / Telematics Black-Box Storage, Smart Home Hub / Wireless Gateway.
Firmware Storage for IoT Nodes
The AT25SF041B-SSHD-B is ideal for firmware storage in Wi-Fi/BLE IoT sensor nodes because its 4 Mbit (512 KB) capacity fits typical OTA update payloads, while the 108 MHz Quad-I/O SPI interface minimizes boot latency at the host MCU. The 2.5V minimum VCC allows direct connection to coin-cell-recycling or 2x AA battery stacks, and the >100 K erase cycles plus >20 year retention provide headroom for years of field-deployed OTA updates. Place a 100 nF decoupling cap within 3 mm of VCC. The 8-SOIC footprint eases hand-soldering for prototype IoT boards.
추천
MCU Boot Flash / Execute-in-Place (XiP)
The AT25SF041B's 108 MHz Quad-I/O mode and XiP support make it suitable as a boot flash for 32-bit microcontrollers that lack internal flash or that need execute-in-place operation. In XiP mode the CPU runs code directly from the serial flash over SPI without first copying it to RAM, saving 512 KB of internal memory. Standard SPI mode 0/3 compatibility means the host MCU's hardware SPI block can drive it without software bit-banging, simplifying driver development. A typical application is a PIC32MZ external XIP flash using the AT25SF041B on the same QSPI bus as the MCU.
추천
Industrial Sensor Data Logging
In industrial sensor and metering designs, the AT25SF041B-SSHD-B stores logged process data because its 512 KB density accommodates roughly 250 K samples of 16-bit measurement data with time-stamp metadata. The >100 K erase cycle endurance tolerates frequent sector updates from continuous logging, while >20 year retention preserves forensic records after a fault. SPI mode 0/3 compatibility means a 4-wire SPI bus suffices, freeing GPIO on the host MCU. Industrial -40 to +85 C temperature range matches factory-floor environmental specs without thermal conditioning.
추천
Consumer HMI / Display Configuration Storage
The AT25SF041B is a fit for HMI panels and consumer appliances that store GUI bitmaps, language tables, and user preferences. 4 Mbit capacity holds roughly 32 full-screen 128x128 monochrome bitmaps or hundreds of localized strings, while 108 MHz Quad-I/O mode enables fast font/bitmap load times for smooth UI scrolling. The 8-SOIC package suits compact hand-held form factors and pick-and-place assembly lines. Low deep power-down current (<1 uA) preserves battery life in remote controls and smart thermostats. Pin-compatible with industry-standard W25X40LQ.
추천
Automotive Infotainment / Telematics Black-Box Storage
The AT25SF041B-SSHD-B can store non-critical infotainment configuration, navigation cache, or telematics event logs in 12 V 3 V automotive subsystems where a rugged 8-SOIC part with industrial temperature grade is sufficient. 4 Mbit holds a navigation tile cache or last-known GPS coordinates; the SPI bus shares PCB with the head-unit SoC without contention. Note: this part is not AEC-Q100 qualified; for safety-critical ADAS-102 storage use Renesas AT25SF041B automotive-grade variants. 2.5V-3.6V supply aligns with 3V automotive rails without level translation.
추천
Smart Home Hub / Wireless Gateway
The AT25SF041B-SSHD-B stores firmware and configuration in Zigbee/Thread/Z-Wave gateway hubs and Wi-Fi smart speakers. Its 4 Mbit density holds both the gateway application image and a recovery image for fail-safe OTA rollbacks. The 8-SOIC footprint drops from the lid of the lid, allowing two flash chips on the same PCB for A/B partition boot schemes. SPI mode 0/3 compatibility means any 3.3V wireless SoC can drive it. Combined with a low-power MCU, the deep power-down <1 uA current preserves standby battery life in always-listening voice assistants.
추천
추천 제품 요약
엔지니어링 참조 데이터: AT25SF041B-SSHD-B — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | AT25SF041-SSHD-B | AT25SF041B-SSHB-T | AT25DF081A-SH-B | AT25DF641A-SH-B | W25Q40CLSNIG | MX25L4006EM2I-12G |
|---|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Winbond | Macronix |
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Memory Size | 4 Mbit (512 KB) | 4 Mbit (512 KB) | 4 Mbit (512 KB) | 8 Mbit (1024 KB) | 64 Mbit (8 MB) | 4 Mbit (512 KB) | 4 Mbit (512 KB) |
| Interface | SPI / Dual-I/O / Quad-I/O | SPI / Dual-I/O / Quad-I/O | SPI / Dual-I/O / Quad-I/O | SPI / Dual-I/O | SPI / Dual-I/O | SPI / Dual-I/O / Quad-I/O | SPI / Dual-I/O / Quad-I/O |
| Max Clock Frequency | 108 MHz (Quad I/O) | 104 MHz | 108 MHz | 85 MHz | 85 MHz | 104 MHz | 86 MHz |
| Supply Voltage | 2.5 V to 3.6 V | 2.7 V to 3.6 V | 2.5 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.7 V to 3.6 V |
| Sector Erase | 4 KB uniform | 4 KB uniform | 4 KB uniform | 4 KB uniform | 4 KB uniform | 4 KB uniform | 4 KB uniform |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Packaging Format | Tube (98 pcs) | Tube | Tape & Reel | Tube | Tube | Tape & Reel | Tape & Reel |
| Approx. Unit Price (qty 1) | $0.62 | $0.68 | $0.62 | $0.85 | $1.95 | $0.55 | $0.48 |
주요 차별점
- Higher Quad-I/O clock (108 MHz) than legacy AT25SF041 (vs AT25SF041-SSHD-B)
- Wider low-voltage operating range than competitor MX25L4006E (vs MX25L4006EM2I-12G)
- Higher Quad-I/O throughput than competitor W25Q40CL (vs W25Q40CLSNIG)
- Same footprint enables PCB design reuse across densities (vs AT25DF081A-SH-B)
설계 노트
Place a 100 nF X7R ceramic decoupling capacitor within 3 mm of the VCC pin (pin 8) on the AT25SF041B-SSHD-B. Use a wide, short VCC trace (>= 20 mil) and a matching ground pour on the layer directly under the SOIC body to minimize supply bounce during page-program and sector-erase operations. Keep SCK trace length under 50 mm and route it over a continuous ground reference to limit ringing at 108 MHz. Series-termination of 25-33 ohm near the SCK driver may be needed for back-plane placements when SCK > 50 MHz.
Always pull CS high during power-up ramp and reset to prevent accidental write-enable latching. The HOLD and WP pins must be tied high (deasserted) for normal single SPI mode; leaving them floating risks spurious HOLD or WP activation that aborts in-progress reads and writes. After every page program or sector erase command, poll the BUSY bit in Status Register 1 before issuing the next command. Failing to wait causes corrupted data and Status Register errors. Estimated: at 3.3V VCC and 25C ambient, page program takes ~1.5 ms per 256-byte page.
In Quad I/O mode, the AT25SF041B repurposes pins 2 (IO1/MISO), 3 (IO2/WP), 5 (IO0/MOSI), and 7 (IO3/HOLD) as bidirectional data lines. Ensure your SPI master peripheral supports quad-I/O mode and that firmware deasserts WP and HOLD during the read. At 108 MHz Quad I/O, set the MCU's QSPI drive strength to its highest setting. Estimated: total system-level read throughput reaches ~52 MB per channel at 108 MHz Quad I/O, saturating typical 32-bit MCU QSPI peripherals. Add a 100 ohm source-termination resistor on SCK if your layout exceeds 75 mm trace length.
The AT25SF041B-SSHD-B consumes negligible power during read operations (typical active read current in single-digit mA range at 108 MHz); thermal management is not a primary concern. However, during page program and sector erase operations, the internal charge pump activates and active current can rise to ~15 mA. Estimated worst-case VCC write-up: at 3.6 V VCC and 15 mA active write current, dissipation is ~54 mW per chip, well within the 8-SOIC theta-JA of ~140 C/W. No heatsink is required.
When entering deep power-down mode, the AT25SF041B-SSHD-B reduces supply current to typically <1 uA, suitable for battery-backed IoT nodes. Issue the 0xB9 command followed by CS high to enter deep power-down; assert CS low and issue 0xAB (Release from Deep Power-Down) plus 3 dummy bytes to wake. Estimated wake time: ~30 us typical. Per the datasheet, the device defaults to standby mode with CS high, drawing standby current of typically 15-25 uA; use deep power-down for sub-uA quiescent designs.
규정 준수 정보
Lead-Free and RoHS compliant per manufacturer product page. AT25SF041B-SSHD-B is industrial grade (-40 C to +85 C) and not AEC-Q100 qualified - for safety-critical ADAS or chassis storage, contact Renesas for the automotive-grade variant. Halogen-free status not stated explicitly in the datasheet excerpts retrieved.
