S-25CM01A0I-J8T1U4 - 1Mbit SPI EEPROM | ABLIC Inc. | SOP-8
料号： S-25CM01A0I-J8T1U4 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.62 | $16.20 |
| 100 | $1.38 | $138.00 |
| 500 | $1.15 | $575.00 |
| 1,000 | $0.98 | $980.00 |
| 3,000 | $0.82 | $2,460.00 |
S-25CM01A0I-J8T1U4 概述
An EEPROM (Electrically Erasable Programmable Read-Only Memory) is a type of non-volatile memory (NVM) that retains data without power and supports byte-level in-system erase and rewrite operations. EEPROMs sit within the broader semiconductor memory hierarchy: EEPROM → non-volatile memory → semiconductor memory → integrated circuit. Unlike Flash memory, which erases in larger blocks, EEPROMs erase and rewrite at the byte or page level, making them ideal for storing configuration parameters, calibration constants, user preferences, and audit logs that change infrequently.
Key features of the S-25CM01A0I-J8T1U4 include a 1 Mbit density (1048576 bits), 128K × 8 memory organization, 256-byte page write capability, write-protect (WP) hardware pin, 1 million erase/write cycles endurance per cell, and 100-year data retention. The wide 2.5 V–5.5 V supply range eliminates the need for level shifters in mixed-voltage designs, and the device's low standby current (typically < 2 µA) suits battery-powered applications.
The device uses CMOS technology with a serial peripheral interface (SPI) bus, allowing compact PCB footprints and high-speed data transfer up to 10 MHz. Page write and sequential read operations enable efficient bulk data updates, while the SPI modes (0, 0) and (1, 1) ensure compatibility with most microcontroller SPI peripherals. Hardware write-protect adds safety against accidental writes in noisy environments.
Typical applications include consumer electronics configuration storage, industrial sensor calibration tables, automotive infotainment settings, IoT device parameter storage, medical device patient records, and metering data logging. The 8-pin SOP package is widely available in tape-and-reel format for automated assembly.
When designing with this EEPROM, ensure the SCK and CS signals have clean edges and that the WP pin is properly biased. Add a 100 nF decoupling capacitor close to VCC, and avoid long write cycles during power-down to prevent data corruption.
This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： S-25CM01A0I-J8T1U4 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
S-25CM01A0I-J8T1U
✅ 直接替换📋 参考替代料（不在目录中）
S-25CM01A0I-J8T2U4
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
S-25CM01A0I-J8T1U3
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
M95M01-RDW6P
✅ 直接替换📋 参考替代料（不在目录中）
25AA1024-I/SN
✅ 直接替换📋 参考替代料（不在目录中）
S-25CM01A0I-J8T1U4 规格参数
| 存储器类型 | Non-Volatile EEPROM (Serial) |
| Memory Density | 1 Mbit (1048576 bits) |
| Memory Organization | 131072 words × 8 bits (128K × 8) |
| Bus Interface | SPI (Serial Peripheral Interface) |
| 最大时钟频率 | 10 MHz |
| Supply Voltage (VCC) | 2.5 V to 5.5 V |
| SPI Modes | Mode 0 (0,0) and Mode 3 (1,1) |
| Page Write Size | 256 bytes |
| Endurance | 1,000,000 erase/write cycles per cell |
| Data Retention | 100 years (typical) |
| Write-Protect Pin | Yes (active-high WP) |
| 封装 | 8-pin SOP (J8) |
| 安装类型 | Surface Mount |
| Operating Temperature (Industrial) | -40 °C to +85 °C |
| Technology | CMOS |
| 无卤 | Yes (per datasheet) |
| Production Status | Full Production |
S-25CM01A0I-J8T1U4 引脚配置
| 引脚 1 | CS — Chip Select, active-low |
| 引脚 2 | SO — Serial Data Out (MISO) |
| 引脚 3 | WP — Write Protect, active-high |
| 引脚 4 | VSS — Ground |
| 引脚 5 | SI — Serial Data In (MOSI) |
| 引脚 6 | SCK — Serial Clock Input |
| 引脚 7 | HOLD — Hold, active-low (pauses serial communication) |
| 引脚 8 | VCC — Power Supply (2.5 V to 5.5 V) |
典型应用
S-25CM01A0I-J8T1U4 适用于 7 应用s: Industrial Sensor Calibration Storage, Consumer Electronics Configuration Memory, Automotive Infotainment Parameter Storage, IoT Edge Device Parameter Logging, Medical Device Calibration and Audit Trail, Smart Metering and Energy Data Logging, Display Module EDID Storage.
Industrial Sensor Calibration Storage
The S-25CM01A0I-J8T1U4 stores factory calibration coefficients, linearity trim values, and device-specific constants in industrial sensors such as pressure transducers, gas detectors, and flow meters. The 128K × 8 organization provides ample space for multi-point calibration tables and compensation curves, while the 1 million erase/write cycle endurance supports frequent field recalibration over the product's service life. The 2.5 V–5.5 V supply range allows direct connection to common 3.3 V and 5 V sensor MCUs without level shifters, and the wide -40 °C to +85 °C industrial operating range ensures reliable operation in factory automation, process control, and outdoor instrumentation. SPI mode 0 (CPOL=0, CPHA=0) and mode 3 (CPOL=1, CPHA=1) compatibility ensures drop-in support for nearly any Cortex-M or AVR sensor host. Page write of 256 bytes enables bulk table updates in under 5 ms.
推荐
Consumer Electronics Configuration Memory
The S-25CM01A0I-J8T1U4 is widely used to store user preferences, factory settings, and feature flags in consumer products such as smart thermostats, audio amplifiers, and home appliances. Its 1 Mbit density holds menu structures, language strings, equalizer presets, and remote-control pairing codes, while the SPI interface supports high-speed boot-time reads to populate UI configurations before main firmware takes over. The 100-year data retention and 1 million write cycles guarantee that user-set values survive across decades of power cycles. The 8-pin SOP (J8) package is small enough for compact consumer enclosures and is fully compatible with automated pick-and-place assembly in tape-and-reel format. Hardware write-protect via the WP pin prevents accidental corruption during firmware updates.
推荐
Automotive Infotainment Parameter Storage
The S-25CM01A0I-J8T1U4 stores audio EQ presets, radio station memories, navigation favorites, seat/mirror position memory, and personalization profiles in automotive infotainment systems. The AEC-Q100 automotive-grade variant (S-25CM01A0I-J8T1U2) provides the qualification required for in-cabin ECUs. The 1 million write cycle endurance supports frequent user-driven updates (volume, station, seat position) over the vehicle's service life, and the 100-year retention guarantees settings persist across long parked periods. The 8-pin SOP package withstands automotive underhood thermal stress when paired with proper PCB thermal relief. SPI mode (0, 0) and (1, 1) compatibility allows the EEPROM to coexist with infotainment SoCs that drive shared SPI buses for touch controllers and DACs.
推荐
IoT Edge Device Parameter Logging
The S-25CM01A0I-J8T1U4 is ideal for IoT edge nodes that log device parameters, sleep/wake cycle counters, and runtime telemetry locally before occasional cloud sync. Its 128K × 8 organization provides ample space for circular log buffers storing weeks of sensor data, while the 1 million write endurance handles continuous logging in industrial IoT deployments. The 2.5 V–5.5 V supply range supports direct connection to single-cell Li-ion or 3.3 V regulated rails in battery-powered IoT nodes, and the sub-2 µA standby current minimizes quiescent drain during deep-sleep intervals. The hardware WP pin protects the device from corruption during OTA firmware updates, which is critical for unattended remote deployments.
推荐
Medical Device Calibration and Audit Trail
The S-25CM01A0I-J8T1U4 provides non-volatile storage for medical device calibration coefficients, dose delivery logs, and patient-specific settings in portable and benchtop equipment. The 1 million write cycle endurance and 100-year data retention meet IEC 62304 software lifecycle documentation requirements for medical firmware parameters. The 8-pin SOP package supports compact handheld enclosures used in patient monitors, infusion pumps, and diagnostic devices. Hardware write-protect prevents accidental overwrites of safety-critical calibration data during service or field updates, and the SPI bus allows firmware engineers to easily implement secure update flows with the EEPROM acting as a fallback image store.
推荐
Smart Metering and Energy Data Logging
The S-25CM01A0I-J8T1U4 stores energy consumption profiles, tamper-event logs, and time-of-use billing data in electricity, gas, and water meters. Its 1 Mbit density holds months of hourly consumption intervals, while the 1 million write endurance supports years of cumulative billing records. The wide 2.5 V–5.5 V supply accommodates battery-backed metering designs, and the small 8-pin SOP package fits inside sealed meter enclosures. Hardware write-protect secures billing data against unauthorized tampering, a regulatory requirement in many jurisdictions. The SPI interface allows utilities to perform remote firmware updates while preserving the consumption log across the update.
推荐
Display Module EDID Storage
The S-25CM01A0I-J8T1U4 stores Extended Display Identification Data (EDID) and DisplayID structures in monitors, projectors, and digital signage panels. The 128K × 8 organization holds multi-resolution EDID tables, HDR metadata blocks, and manufacturer-specific extensions required by HDMI 2.0 and DisplayPort 1.4 sink devices. The 10 MHz SPI clock allows fast EDID reads during HDMI handshake, minimizing display enumeration latency. Hardware WP protects EDID from corruption during display self-test routines, and the small 8-pin SOP package fits inside slim bezel LCD/OLED panel assemblies. Page write of 256 bytes enables full EDID block updates in a single cycle.
推荐
推荐产品汇总
工程参考数据： S-25CM01A0I-J8T1U4 ——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 | S-25CM01A0I-J8T1U | S-25CM01A0I-J8T2U4 | M95M01-RDW6P | 25AA1024-I/SN |
|---|---|---|---|---|---|
| Brand | ABLIC Inc. | ABLIC Inc. | ABLIC Inc. | STMicroelectronics | Microchip Technology |
| Package | 8-pin SOP (J8) | 8-pin SOP (J8) - same | 8-pin SOP (J8) - same | 8-pin TSSOP (DW) - verify land pattern | 8-pin SOIC (SN) - same footprint |
| Memory Density | 1 Mbit | 1 Mbit | 1 Mbit | 1 Mbit | 1 Mbit |
| Maximum SPI Clock | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 1 MHz (-90%) |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 1.8 V to 5.5 V (wider) | 1.8 V to 5.5 V (wider) |
| Endurance | 1,000,000 cycles | 1,000,000 cycles | 1,000,000 cycles | 1,000,000 cycles | 1,000,000 cycles |
| Data Retention | 100 years | 100 years | 100 years | 200 years (longer) | 200 years (longer) |
| Automotive Grade | No (industrial) | No (industrial) | Yes (AEC-Q100) | No (industrial) | No (industrial) |
关键差异点
- Same-package drop-in across the S-25CM01A family （对比 S-25CM01A0I-J8T1U)
- Automotive-grade sibling available in same package （对比 S-25CM01A0I-J8T2U4)
- Higher clock rate than Microchip 25AA1024 （对比 25AA1024-I/SN)
- 100-year data retention （对比 M95M01-RDW6P)
设计说明
Place a 100 nF ceramic decoupling capacitor as close as possible to the VCC pin (pin 8) and VSS pin (pin 4). For designs with noisy 5 V supplies (long cables, relay coils, or motor drivers), add a 10 µF bulk capacitor near the EEPROM to prevent VCC droops during write cycles that could corrupt data. The ABLIC datasheet specifies a write cycle time of up to 5 ms per page; if VCC drops below 2.5 V during this window, the write may fail silently. Add a power-OK signal or MCU brown-out check before issuing write commands.
The 8-pin SOP (J8) package has a recommended PCB land pattern per JEDEC SO-8 with 1.27 mm (50 mil) pin pitch. Keep SPI traces short (< 50 mm) and route them away from switching power converters, motor drivers, and high-current traces. Use a ground plane under the EEPROM to provide reference and reduce radiated EMI pickup. If the WP pin is not used, tie it to VSS through a 10 kΩ resistor to allow software-only writes. If HOLD is unused, tie it to VCC (active-high disable).
The S-25CM01A0I-J8T1U4 supports SPI modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1). Configure the host MCU's SPI peripheral accordingly. Add 4.7 kΩ to 10 kΩ pull-up resistors on CS, WP, and HOLD lines to VCC to ensure defined logic levels during MCU reset or brown-out. Avoid clock frequencies above 10 MHz even if the host MCU supports faster rates - the EEPROM will not respond reliably and may corrupt the read CRC. Use DMA-based SPI transfers on the host to prevent CPU stalls during sequential reads.
Do not issue a write command without first sending the WREN (Write Enable) instruction - the EEPROM will silently ignore the data and the host may falsely believe the write succeeded. Always poll the WIP (Write In Progress) bit in the status register before issuing the next operation. Avoid simultaneous SPI bus sharing with devices that have conflicting CS polarity - the S-25CM01A0I uses active-low CS. When writing multiple pages, split into 256-byte chunks and add 5 ms delay between pages to allow internal write completion.
合规信息
ABLIC S-25CM01A0I-J8T1U4 is RoHS compliant, halogen-free per ABLIC datasheet. Standard variant is not AEC-Q100 qualified; choose J8T2U4 suffix for automotive grade. JEDEC J-STD-020 MSL Level 1.
