M25P20-VMN3PB - 2Mbit SPI NOR Flash 75MHz SOIC-8 | Micron
料号： M25P20-VMN3PB ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.9 | $0.90 |
| 10 | $0.85 | $8.50 |
| 100 | $0.78 | $78.00 |
| 500 | $0.7 | $350.00 |
| 1,000 | $0.65 | $650.00 |
M25P20-VMN3PB 概述
Serial NOR Flash is a nonvolatile memory category in which data is read, programmed, and erased over a serial peripheral interface (SPI) rather than a parallel bus. Within the memory hierarchy it sits under Flash memory -> NOR Flash -> serial/quad SPI memory, and is widely used for code storage (XIP), FPGA configuration, and parameter logging because it offers random-access-like byte readability, high reliability, and a minimal pin count.
Key features of the M25P20 include a 2 Mbit organization (256 Kbytes, 4 sectors of 512 Kbit each, 256-byte pages), page program times of 0.8 ms typical for up to 256 bytes, sector erase of 0.6 s typical (512 Kbit), and bulk erase of 3 s typical. The 75 MHz SPI clock rate supports fast code fetch and configuration downloads. Write protect and hold functions are provided on dedicated pins for hardware data protection and bus sharing.
The M25P20 uses Micron NOR Flash cell technology with a standard SPI command set (READ, FAST_READ, PAGE PROGRAM, SECTOR ERASE, BULK ERASE, WRITE ENABLE/DISABLE, READ STATUS), making it command-compatible with many industry-standard serial Flash devices and simplifying firmware reuse. The VMN3 package option is lead-free (Pb-free) and RoHS compliant, and the device supports an extended industrial temperature range.
Typical applications include FPGA configuration bitstream storage, embedded microcontroller code and data storage, LCD panel and display controller firmware, networking equipment boot code, and industrial automation parameter storage. The small SOIC-8 footprint suits space-constrained boards.
For design, keep SPI trace lengths short and use series termination near the source when operating at the full 75 MHz clock rate; decouple VCC with a 100 nF ceramic capacitor close to pin 8.
This page synthesizes distributor pricing, verified drop-in alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet.
直接替换替代料： M25P20-VMN3PB ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： M25P20-VMN3PB （相同外形与封装尺寸） ——差异在于 Bulk Erase Time, Interface, Package, RoHS Status, Sector Erase Time.
快速对比工具——选择替代料号进行并排对比：
M25P20-VMN6GB
✅ 直接替换📋 参考替代料（不在目录中）
M25P20-VMN6TGB
✅ 直接替换📋 参考替代料（不在目录中）
M25P20-VMN3TPB
✅ 直接替换✓ 有现货
$0.8 / 个
查看数据手册 →IS25LQ020A-JNLE
✅ 直接替换📋 参考替代料（不在目录中）
IS25LQ020A-JNLV
✅ 直接替换📋 参考替代料（不在目录中）
AT25F2048Y7-YH27-T
✅ 直接替换📋 参考替代料（不在目录中）
A25L20PUQ-F
✅ 直接替换📋 参考替代料（不在目录中）
M25P20-VMN3PB 最大额定值与电气特性
| 存储器类型 | NOR Flash, Serial SPI |
| 存储容量 | 2 Mbit (256 Kbyte) |
| 存储组织 | 256K x 8 |
| Max Clock Frequency | 75 MHz |
| 电源电压 | 2.7 V to 3.6 V |
| 接口 | SPI (Serial Peripheral Interface) |
| Page Program Time | 0.8 ms typical (up to 256 bytes) |
| Sector Erase Time | 0.6 s typical (512 Kbit sector) |
| Bulk Erase Time | 3 s typical (2 Mbit) |
| Number of Sectors | 4 (512 Kbit each) |
| Page Size | 256 bytes |
| 工作温度 | -40C to +125C |
| 封装 | 8-SO (SOIC-8, 0.150 inch width) |
| 安装类型 | Surface Mount |
| Pins | 8 |
| RoHS 状态 | Compliant (Pb-free) |
| Write Protect | Hardware /W pin |
| Hold Function | Yes (/HOLD pin) |
M25P20-VMN3PB 引脚配置
| 引脚 1 | /S — Chip Select (active low) |
| 引脚 2 | Q — Serial Data Output (MISO) |
| 引脚 3 | /W — Write Protect (active low) |
| 引脚 4 | VSS — Ground |
| 引脚 5 | D — Serial Data Input (MOSI) |
| 引脚 6 | C — Serial Clock |
| 引脚 7 | /HOLD — Hold (suspend SPI transfer) |
| 引脚 8 | VCC — Power supply (2.7 V to 3.6 V) |
典型应用
M25P20-VMN3PB 适用于 6 应用s: FPGA Configuration Storage, Embedded Microcontroller Code and Data Storage, Networking Equipment Boot Code, Display and LCD Controller Firmware, Industrial Automation Parameter Storage, Consumer Electronics Firmware Storage.
FPGA Configuration Storage
The M25P20-VMN3PB stores 2 Mbit (256 Kbyte) configuration bitstreams for small-to-mid-size FPGAs and CPLDs, read over its 75 MHz SPI interface. At the maximum clock, code fetch achieves roughly 9.4 MB/s, so a full configuration image loads in a few tens of milliseconds, meeting typical FPGA power-on-to-operational budgets. The device implements the standard M25P command set (READ, FAST_READ) that FPGA configuration loaders directly support, and its 2.7V-3.6V supply connects to common 3.3V configuration rails without level shifting. Designers should hold /S high during FPGA power-up and use the /HOLD pin when the SPI bus is shared with other peripherals.
推荐
Embedded Microcontroller Code and Data Storage
In MCU-based systems where on-chip Flash is insufficient, the M25P20-VMN3PB provides 256 Kbytes of external code or data storage via a standard 4-wire SPI bus. The 0.8 ms typical page program time allows parameter logging at up to kilohertz rates per 256-byte page, while 0.6 s sector erase supports wear-managed logging schemes across the four 512 Kbit sectors. The hardware /W write-protect pin can gate the status register and block protect regions against accidental corruption during brownout. With -40C to +125C operation, the device suits automotive-adjacent and industrial controller environments where reliable nonvolatile storage is mandatory.
推荐
Networking Equipment Boot Code
Switches, routers, and Ethernet controllers require a small, reliable nonvolatile store for boot loaders and MAC/PHY initialization code. The M25P20-VMN3PB's 75 MHz SPI clock and FAST_READ command deliver the read bandwidth needed for fast boot, while its industrial temperature rating and Pb-free SOIC-8 package fit standard telecom hardware profiles. The bulk erase command (3 s typical) enables full-image reflashing during field firmware updates, and 256-byte page programming matches common boot image erase-block granularity. Decouple VCC with 100 nF close to pin 8 to handle program current transients shared with the host SoC rail.
推荐
Display and LCD Controller Firmware
LCD panels, OLED modules, and display controllers store gamma tables, configuration scripts, and OSD fonts in serial NOR Flash. The M25P20-VMN3PB's 2 Mbit capacity holds typical 256 Kbyte font and calibration sets, and its SOIC-8 footprint fits behind display modules. The /HOLD pin permits sharing one SPI bus between the display controller and touch sensor without bus conflicts, suspending a transfer and resuming without losing the read address. With a 2.7V-3.6V supply matching the 3.3V display rail and -40C to +85C operation required by most display modules (device supports +125C), it integrates cleanly into monitor and signage hardware.
推荐
Industrial Automation Parameter Storage
PLCs, motor drives, and sensor nodes must persist calibration constants, counters, and configuration across power cycles in electrically noisy industrial environments. The M25P20-VMN3PB provides 2 Mbit of nonvolatile storage with hardware write protect via /W, allowing critical parameter blocks to be locked after commissioning. Its -40C to +125C range covers drive enclosures and cabinet installations, and the standard SPI command set is supported by all major MCU ecosystems, shortening firmware development. Sector erase (0.6 s typical) supports dual-bank parameter schemes so a failed update on one sector leaves the fallback bank intact.
推荐
Consumer Electronics Firmware Storage
Set-top boxes, appliances, and IoT devices use low-density serial NOR Flash for boot ROMs and firmware because NOR offers direct byte-read access required by first-stage boot loaders, unlike NAND. The M25P20-VMN3PB's low cost (from about $0.90 as of 2026-09-02), Pb-free SOIC-8 package, and 75 MHz interface made it a volume staple for this role. Although the part is EOL, remaining inventory still supports service and repair builds; new consumer designs should qualify the listed drop-in equivalents (IS25LQ020A, AT25F2048) to secure long-term supply without PCB redesign.
推荐
推荐产品汇总
工程参考数据： M25P20-VMN3PB ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | M25P20-VMN3TPB | IS25LQ020A-JNLE | AT25F2048Y7-YH27-T | A25L20PUQ-F |
|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same |
| Brand | Micron Technology | Micron Technology | Renesas Electronics (ISSI) | Microchip Technology | Will Semiconductor (AMIC) |
| Memory Size | 2 Mbit | 2 Mbit | 2 Mbit | 2 Mbit | 2 Mbit |
| Interface | SPI, 75 MHz | SPI, 75 MHz | SPI | SPI | SPI |
| 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 |
关键差异点
- Standard M25P command set with wide ecosystem support （对比 AT25F2048Y7-YH27-T)
- 75 MHz SPI clock for fast code fetch （对比 A25L20PUQ-F)
- Trade-off: end-of-life status （对比 IS25LQ020A-JNLE)
设计说明
At the full 75 MHz SPI clock, treat the four SPI lines as controlled-impedance traces. Keep total trace length under about 10 cm, route C (clock) away from Q (data out) where possible, and add 22-33 ohm series resistors near the driver on C and D if ringing appears at 3.3V edges. Ensure /S rises before the clock starts and hold times per the M25P20 datasheet (Rev. C) are met; undershoot below VSS on /S can trigger spurious write-enable states.
Place a 100 nF ceramic decoupling capacitor within 2-3 mm of the VCC pin (pin 8) plus a 4.7-10 uF bulk capacitor on the 3.3V rail. Program and erase operations draw transient current bursts that, if un-decoupled, dip VCC below the 2.7V minimum and can corrupt in-flight writes. If the Flash shares a rail with an RF or MCU load, consider a small ferrite bead between the bulk capacitor and the device.
The /W pin only protects against write-enable of the status register and protected regions - it does not prevent all writes; implement software write-protection via the block-protect bits for critical data. Do not float /HOLD; tie it high through a 10k resistor if unused. Because the M25P family is EOL, define a second-source footprint strategy now: the listed SOIC-8 equivalents (IS25LQ020A, AT25F2048) fit the same land pattern but require command-set regression testing before qualification.
合规信息
RoHS compliant per digchip specification data; SOP-8 plastic package is RoHS compliant. PB suffix designates Pb-free package in tube packing. REACH, halogen-free, and conflict minerals status not stated in verified data.
