AT25SF2561C-SXUB-T - 256Mbit SPI NOR Flash | Renesas
부품 번호: AT25SF2561C-SXUB-T ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.18 | $21.80 |
| 100 | $1.85 | $185.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.45 | $1,450.00 |
AT25SF2561C-SXUB-T 개요
What is a serial NOR flash? A NOR flash is a non-volatile memory that retains data without power and supports random-access reads (execute-in-place / XIP), making it ideal for code storage and boot media. "Serial" means the device exposes a low pin-count SPI bus instead of a wide parallel interface. The category hierarchy is: NOR flash -> flash memory -> non-volatile memory -> semiconductor memory. Drop-in compatible SPI NOR flashes share pinout, command set, and timing, allowing them to be interchanged across footprints or as second-source supply.
Key specifications: 256 Mbit density (32 MB user addressable); 2.7-3.6 V single supply; -40 °C to +85 °C industrial operating range; 133 MHz maximum SPI clock with DTR support; 4 KB sector, 32 KB and 64 KB block erase granularities; >100k endurance cycles per sector and >20-year data retention; uniform 4 KB sector architecture with built-in erase/program suspend/resume.
Technical depth: the device uses a NOR array cell with a high-speed SPI controller implementing JEDEC JESD216 (serial flash discoverable parameters) plus extended Renesas SFDP registers, allowing automatic identification by modern boot ROMs. Multiple security features include a 256-bit OTP security register, individual block protection bits, and a hardware write-protect pin, satisfying secure-boot requirements. Deep power-down current is in the single-digit microamp range for battery-backed designs.
Typical applications include IoT firmware and bootloader storage, industrial HMI and PLC parameter logging, automotive infotainment secondary boot (with Q-1 grade variants for AEC-Q100), consumer set-top boxes, and wireless modules where Quad-SPI XIP loads MCU code directly from flash. Designers can also use it as a redundant parameter store alongside an internal MCU EEPROM emulation area.
Design consideration: keep the SPI traces short and length-matched when using Dual/Quad modes to avoid setup/hold violations, and place a 100 nF decoupling capacitor within 5 mm of the VCC pin. Note that the SXUB package is 16-SOIC 300 mil, while the smaller-footprint SUB package uses 8-SOIC; they are NOT pin-compatible drop-in replacements.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes beyond the manufacturer datasheet, helping engineers shorten the sourcing and second-source risk-evaluation cycle.
드롭인 대체품: AT25SF2561C-SXUB-T — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
AT25QF2561C-SXUB-T
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AT25SF2561C-SXUB
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MX25L25635FM2I-10G
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
W25Q256JVSIQ
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
IS25LP256D-JBLE
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AT25SF2561C-SXUB-T 최대 정격 & 전기적 특성
| 메모리 유형 | Non-volatile NOR Flash |
| Memory Density | 256 Mbit (32 MB) |
| Memory Organization | 32M x 8 |
| 인터페이스 | SPI, Dual SPI, Quad SPI, QPI, DTR |
| 최대 클록 주파수 | 133 MHz |
| Supply Voltage (VCC) | 2.7 V to 3.6 V |
| 동작 온도 | -40 °C to +85 °C (Industrial) |
| 패키지 | 16-SOIC (300 mil) |
| Sector Size | 4 KB uniform sectors |
| Block Erase Sizes | 32 KB / 64 KB |
| Page Program Size | 256 B |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
AT25SF2561C-SXUB-T 핀 구성
| 핀 1 | /CS — Chip Select (active low) |
| 핀 2 | SO — Serial Data Out (also SIO1 in Quad mode) |
| 핀 3 | /WP — Write Protect (active low; SIO2 in Quad mode) |
| 핀 4 | GND — Ground |
| 핀 5 | SI — Serial Data In (also SIO0 in Quad mode) |
| 핀 6 | SCK — Serial Clock |
| 핀 7 | /HOLD — Hold (active low; SIO3 in Quad mode) |
| 핀 8 | VCC — Power Supply (2.7 V to 3.6 V) |
| 핀 9 | NC — Not connected (per datasheet) |
| 핀 10 | NC — Not connected (per datasheet) |
| 핀 11 | NC — Not connected (per datasheet) |
| 핀 12 | NC — Not connected (per datasheet) |
| 핀 13 | NC — Not connected (per datasheet) |
| 핀 14 | NC — Not connected (per datasheet) |
| 핀 15 | NC — Not connected (per datasheet) |
| 핀 16 | NC — Not connected (per datasheet) |
일반적인 애플리케이션
AT25SF2561C-SXUB-T 적합 용도: 6 애플리케이션s: IoT Firmware & Bootloader Storage, Industrial HMI and PLC Parameter Logging, Automotive Infotainment Secondary Boot Media, Set-Top Box and Consumer Streaming Devices, Wireless Module Code Storage, Smart Meter Data Logging.
IoT Firmware & Bootloader Storage
The AT25SF2561C-SXUB-T stores 32 MB of IoT firmware and bootloader images on a 3.3 V SPI bus typical for Cortex-M and RISC-V MCUs, while its 133 MHz Quad-SPI / DTR modes let the host execute-in-place (XIP) directly from flash for fast cold-start. Compared with smaller 8 Mbit AT25 parts, the 256 Mbit density supports dual-image A/B firmware updates for over-the-air (OTA) updates with rollback safety. The 2.7-3.6 V single supply, industrial -40 °C to +85 °C range, and microamp deep-down current suit battery-backed sensor nodes that spend most of their life asleep.
추천
Industrial HMI and PLC Parameter Logging
In industrial HMI panels and PLCs, the AT25SF2561C-SXUB-T logs configuration parameters, recipe data, and event history on a 3.3 V SPI bus with 256 Mbit (32 MB) of non-volatile space, while uniform 4 KB sectors and 32/64 KB block-erase granularity minimize write amplification for frequent logging workloads. The 100k-cycle endurance per sector supports typical parameter-edit lifetimes, and the 256-byte page-program buffer accelerates bulk-data writes. Hardware /WP and individual block-protection bits let designers lock critical parameter pages against accidental overwrite during field updates.
추천
Automotive Infotainment Secondary Boot Media
Tier-1 infotainment platforms use the AT25 family as secondary-boot / graphics-asset storage where 32 MB is sufficient for splash screens, fonts, and recovered images; designers should choose the AEC-Q100 qualified automotive variant instead of the industrial -T part for in-vehicle ECUs. Quad-SPI and DTR modes let the head-unit's AP fetch assets quickly without taxing the main eMMC, lowering perceived UI latency. The 16-SOIC 300 mil package and SPI command set are footprint-compatible with common automotive display-controller reference designs.
추천
Set-Top Box and Consumer Streaming Devices
Set-top boxes and streaming dongles leverage the AT25SF2561C-SXUB-T to store bootloaders, fonts, language packs, and recovery images on a 3.3 V SPI bus while the host SoC runs Linux from eMMC; XIP-boot from Quad-SPI cuts cold-boot times visibly compared with single-I/O SPI. The 32 MB capacity absorbs dual A/B firmware images plus a recovery partition, and the deep power-down mode keeps standby power negligible when the box is off. The 16-SOIC 300 mil package fits mainstream consumer board footprints without requiring PCB rework.
추천
Wireless Module Code Storage
Wi-Fi, BLE, and LoRa modules co-locate the AT25SF2561C-SXUB-T next to the radio SoC for storing firmware-upgrade images, regulatory certificates, and customer configuration blocks across 32 MB of SPI-attached space. The Quad-SPI bus fits cleanly into standard 3.3 V SoC peripheral pads, and hardware write-protect prevents accidental erasure of locked certificates during field provisioning. Industrial temperature rating and 100k-cycle endurance per sector match the duty cycle of typical IoT module firmware-update workloads.
추천
Smart Meter Data Logging
Smart electricity, gas, and water meters store interval readings, tamper flags, and firmware images in the AT25SF2561C-SXUB-T, taking advantage of 32 MB to hold multiple years of metering history alongside periodic firmware updates. Industrial -40 °C to +85 °C support covers outdoor meter enclosures, while the 2.7-3.6 V supply matches 3.3 V metrology MCUs and battery-backup circuits. Hardware block protection and 256-bit OTP security registers help enforce meter-certification tamper-evidence requirements.
추천
추천 제품 요약
엔지니어링 참조 데이터: AT25SF2561C-SXUB-T — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | AT25QF2561C-SXUB-T | AT25SF2561C-SXUB | MX25L25635FM2I-10G | W25Q256JVSIQ | IS25LP256D-JBLE |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Macronix | Winbond | ISSI |
| Package | 16-SOIC (300 mil) | 16-SOIC (300 mil) - same | 16-SOIC (300 mil) - same | 16-SOIC (300 mil) - same | 16-SOIC (300 mil) - same | 16-SOIC (300 mil) - same |
| Memory Density | 256 Mbit (32 MB) | 256 Mbit (32 MB) | 256 Mbit (32 MB) | 256 Mbit (32 MB) | 256 Mbit (32 MB) | 256 Mbit (32 MB) |
| Interface Modes | SPI, Dual, Quad, QPI, DTR | SPI, Dual, Quad, QPI, DTR | SPI, Dual, Quad, QPI, DTR | SPI, Dual, Quad (with DTR support) | SPI, Dual, Quad, QPI, DTR | SPI, Dual, Quad, DTR |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V |
| 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 |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
주요 차별점
- Same-family Quad-focused variant available (vs AT25QF2561C-SXUB-T)
- Wide multi-source 16-SOIC 300 mil ecosystem (vs MX25L25635FM2I-10G, W25Q256JVSIQ, IS25LP256D-JBLE)
- Industrial temperature range and Quad/DTR support (vs W25Q256JVSIQ)
설계 노트
Keep the SPI traces (SCK, /CS, SI, SO) short and length-matched within ~10 mm when using Dual or Quad modes. Above 50 MHz clock rate, route them over a continuous ground plane and avoid parallel runs with noisy power or RF traces. Place a 100 nF decoupling capacitor within 5 mm of the VCC pin and add a bulk 10 uF nearby; this stabilizes the rail during program/erase bursts and prevents spurious sector-write failure flags.
Do not assume the AT25SF2561C-SXUB-T (16-SOIC 300 mil) and AT25SF2561C-SUB-T (8-SOIC 150 mil) are interchangeable. The SXUB has dedicated /WP and /HOLD pins on separate pads; the SUB reuses those pads for VCC and GND. Substituting one for the other without a PCB change will short /WP or /HOLD and prevent correct operation.
Program and erase operations draw noticeably higher current than read; design the 3.3 V rail with at least 50 mA of headroom above the steady MCU draw. Brown-out or excessive ripple during a sector erase can leave the flash reporting an error in its status register, requiring the controller to retry. Use the status-register polling bus rather than fixed delays to detect completion efficiently.
When using DTR (double transfer rate) reads, treat the SCK edges as 133 MHz-rate source-synchronous clocking; add a small 10-100 ohm series resistor near the driver if reflections appear on long traces. Verify setup/hold at the host MCU with an oscilloscope probe on the SCK/SO pair under worst-case (cold -40 °C and hot +85 °C) corners.
규정 준수 정보
Base AT25SF2561C-SXUB-T is industrial grade (not AEC-Q100). For automotive, use the AEC-Q100 qualified automotive variant MPN in the AT25 family rather than the -T industrial suffix. RoHS and lead-free per Renesas product page.
