24LC1025T-I/SM - 1Mb I2C EEPROM, 2.5-5.5V, 8-SOIJ | Microchip
부품 번호: 24LC1025T-I/SM ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.62 | $26.20 |
| 100 | $2.31 | $231.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.84 | $1,840.00 |
| 2,500 | $1.68 | $4,200.00 |
24LC1025T-I/SM 개요
What is an I2C Serial EEPROM? An EEPROM (Electrically Erasable Programmable Read-Only Memory) is a non-volatile memory that retains data without power and supports byte-level electrical erase and rewrite. I2C (Inter-Integrated Circuit) serial EEPROMs communicate over a two-wire bus (SCL clock + SDA data), making them ideal when a system microcontroller needs a small, low-pin-count, low-power store for configuration, calibration, or event logs. In the component taxonomy, the 24LC1025T-I/SM sits at: serial EEPROM -> EEPROM -> non-volatile memory -> memory IC -> semiconductor IC. Compared with Flash, EEPROM offers byte-level write granularity, simpler firmware drivers, and far higher endurance-per-byte for small-parameter storage.
Key features of the 24LC1025T-I/SM include a 1 Mbit (128K x 8) density organized across two 64K-byte address blocks with software-selectable block addressing via the A0/A1/A2 device-address pins (function address lines), hardware write-protect (WP), and support for both random and sequential read across the full 0000h to 1FFFFh address range. The device implements a 128-byte page-write buffer, cascading write capability up to 64 bytes per page, and self-timed erase/write cycles. Typical active read current is 1 mA maximum, standby current is 1 µA maximum, and the device operates across the industrial -40C to +85C temperature range.
Technically, the 24LC1025T-I/SM uses Microchip's proprietary CMOS EEPROM process and an I2C-compatible two-wire serial interface (SMBus-compatible at lower speeds). The 7-bit slave address uses the upper-four fixed bits (1010) with three user-configurable device-address bits, allowing up to eight 24LC1025 devices to share a single I2C bus for total storage up to 8 Mbit. Write operations require only the slave address, word address, and up to 128 bytes of data; the device automatically generates the ACK and ACK-after-write polling response.
Typical applications include data logging in personal communications devices, parameter storage in industrial data-acquisition systems, configuration retention for consumer electronics, black-box event recording in metering equipment, and storing calibration constants in sensor modules. The 8-SOIJ (SOIJ-8) J-lead surface-mount package provides stronger lead compliance and better thermal-cycle reliability than standard SOIC, making the part well-suited to automotive under-hood, industrial, and high-vibration environments.
When designing with this device, note that the WP pin must be tied to VCC or GND (it must not float), and that a 100 nS minimum SCL high/low time and 1.2 µS bus free time must be respected. Pull-up resistors on SDA and SCL are required; typical values are 4.7 kohm for 3.3V/5V VCC and shorter buses, and 2.2 kohm for longer or more heavily loaded buses.
This page synthesizes distributor pricing, drop-in same-package alternatives, design notes, and application guidance not consolidated on the Microchip product page or any single distributor listing.
드롭인 대체품: 24LC1025T-I/SM — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: 24LC1025T-I/SM (동일 폼 팩터 및 풋프린트) — 차이점: Data Retention, Endurance, Memory Type, Interface, Memory Size.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
24LC1025-I/SM
✅ 드롭인✓ 재고 있음
$2.1 / 개
데이터시트 보기 →24AA1025T-I/SM
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
24FC1025T-I/SM
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
24AA1025T-E/SM
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
M24M01-RMN6P
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AT24CM01-SSHM-T
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
24LC1025T-I/SM 사양
| 메모리 유형 | Non-volatile EEPROM |
| 메모리 크기 | 1 Mbit (128K x 8) |
| Memory Organization | Two 64K x 8 blocks with software block-select |
| 인터페이스 | I2C (2-wire serial) |
| 최대 클록 주파수 | 400 kHz |
| Access Time | 900 ns |
| Operating Voltage Range | 2.5 V to 5.5 V |
| Write Cycle Time | 5 ms (byte/page, self-timed) |
| Page Write Buffer Size | 128 bytes |
| Device Address Pins | A0, A1, A2 (hardware-selectable, up to 8 devices per bus) |
| Write Protect Pin (WP) | Yes (hardware WP of entire array) |
| Active Read Current | 1 mA maximum |
| Standby Current | 1 µA maximum |
| Endurance | 1,000,000 erase/write cycles per page (typical) |
| Data Retention | 200 years (typical) |
| 동작 온도 | -40C to +85C (industrial, I grade) |
| 패키지 | 8-SOIJ (SOIJ-8, J-lead, 5.30 mm body width) |
| 실장 유형 | Surface Mount (Tape & Reel) |
| MSL 레벨 | 1 (unlimited floor life) |
| RoHS 상태 | Compliant |
24LC1025T-I/SM 핀 구성
| 핀 1 | A0 — Device address bit 0 (tie to VCC or GND) |
| 핀 2 | A1 — Device address bit 1 (tie to VCC or GND) |
| 핀 3 | A2 — Device address bit 2 (tie to VCC or GND) |
| 핀 4 | VSS — Ground reference |
| 핀 5 | SDA — Serial data (open-drain; external pull-up required) |
| 핀 6 | SCL — Serial clock (external pull-up required) |
| 핀 7 | WP — Write protect (tie to VCC to protect array; GND to enable writes) |
| 핀 8 | VCC — Supply voltage 2.5V to 5.5V |
일반적인 애플리케이션
24LC1025T-I/SM 적합 용도: 6 애플리케이션s: Personal Communications Device Parameter Storage, Industrial Data Acquisition Logger, Smart Meter Calibration & Event Log, Black-Box Recorder & Event Audit Trail, Consumer Audio/Video Equipment Settings, IoT Sensor Module Calibration Storage.
Personal Communications Device Parameter Storage
The 24LC1025T-I/SM is a strong fit for parameter storage in personal communications handsets, where it stores user preferences, calibration data, RF power tables, and last-network selection. Its 1 Mbit (128K x 8) capacity holds full feature-set profiles plus history; the I2C interface minimizes GPIO use on the baseband MCU; the 1 µA standby current preserves battery life in idle; and the 8-SOIJ J-lead package survives handheld mechanical stress. Typical designs use it as a shadow store, mirroring Wi-Fi/Bluetooth credentials and IMEI-equivalent identifiers.
추천
Industrial Data Acquisition Logger
The 24LC1025T-I/SM suits multi-channel industrial data loggers that capture sensor waveforms, run-hours, alarm history, and configuration profiles. The 1 Mbit density supports tens of thousands of 16-bit samples or full sensor calibration blocks; the 128-byte page buffer speeds block writes; hardware write-protect via WP prevents accidental field reprogramming; and the industrial -40C to +85C temperature range tolerates factory-floor conditions. The 8-SOIJ package's J-leads improve thermal-cycle reliability vs SOIC in outdoor enclosures.
추천
Smart Meter Calibration & Event Log
For electricity, water, and gas smart meters, the 24LC1025T-I/SM stores factory calibration coefficients, RTC compensation tables, tamper flags, and rolling consumption history. Its 200-year data retention far exceeds the typical 15-20 year meter service life; the byte-level write granularity suits individual event records without erase sectors; and the 1M-cycle endurance handles frequent load-profile writes. The 8-SOIJ package is approved by most metering reference designs and fits behind the meter's tamper seal.
추천
Black-Box Recorder & Event Audit Trail
The 24LC1025T-I/SM serves as the audit-log backbone in elevator controllers, industrial machine tools, and medical device event recorders. Its 1 Mbit capacity retains months of timestamped operational events and fault codes; sequential read at 400 kHz supports fast log dumps over I2C during service; the WP pin allows service-mode lockout of critical sections. The robust 8-SOIJ J-lead package handles high-vibration installations without cracked solder joints.
추천
Consumer Audio/Video Equipment Settings
In AV receivers, sound bars, and smart TVs, the 24LC1025T-I/SM stores user EQ curves, surround-mode preferences, HDMI-CEC device maps, parental-control PINs, and language/region defaults. Its byte-write flexibility lets designers update single settings without erasing unrelated data; the 1 µA standby current is invisible to the standby-power budget; and the 8-SOIJ footprint is standard across consumer AV reference designs. Sequential read enables quick boot-time configuration restore.
추천
IoT Sensor Module Calibration Storage
The 24LC1025T-I/SM provides calibration and identity storage for IoT sensor nodes - environmental, gas, and motion sensors - storing per-unit compensation coefficients, certificates, and provisioning keys. The 1 Mbit space holds multiple sensor profiles in one device; the I2C bus shares the same wires used by many sensors, simplifying routing; and the wide 2.5V-5.5V supply matches coin-cell and lithium chemistries. The 8-SOIJ package is small enough for sensor PCBs yet rugged for field deployment.
추천
추천 제품 요약
엔지니어링 참조 데이터: 24LC1025T-I/SM — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | 24LC1025-I/SM | 24AA1025T-I/SM | 24FC1025T-I/SM | 24AA1025T-E/SM | M24M01-RMN6P | AT24CM01-SSHM-T |
|---|---|---|---|---|---|---|---|
| Package | 8-SOIJ (5.30 mm) | 8-SOIJ (5.30 mm) - same | 8-SOIJ (5.30 mm) - same | 8-SOIJ (5.30 mm) - same | 8-SOIJ (5.30 mm) - same | 8-SO (150 mil) - gull-wing variant | 8-SOIC (3.90 mm) - narrow body |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics | Microchip Technology (Adesto legacy) |
| Memory Size | 1 Mbit (128K x 8) | 1 Mbit | 1 Mbit | 1 Mbit | 1 Mbit | 1 Mbit | 1 Mbit |
| Interface / Max Clock | I2C, 400 kHz | I2C, 400 kHz | I2C, 400 kHz | I2C, 1 MHz | I2C, 400 kHz | I2C, 400 kHz | I2C, 1 MHz |
| Operating Voltage | 2.5V to 5.5V | 2.5V to 5.5V | 1.7V to 5.5V | 2.5V to 5.5V | 1.7V to 5.5V | 2.5V to 5.5V (some variants 1.8V-5.5V) | 1.7V to 3.6V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C |
| Page Write Size | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 256 bytes | 256 bytes |
| Standby Current (max) | 1 µA | 1 µA | 1 µA | 1 µA | 1 µA | 1 µA | 1 µA |
주요 차별점
- Same-brand drop-in speed upgrade available (vs 24FC1025T-I/SM)
- Same-brand drop-in supply-range upgrade (vs 24AA1025T-I/SM)
- Cross-brand pin-compatible competitor part (vs M24M01-RMN6P (STMicroelectronics))
설계 노트
Place the 24LC1025T-I/SM as close as possible to the host MCU's SDA/SCL pins to minimize bus capacitance. Keep the SOIJ-8 device away from switching-regulator switching nodes and high-current traces to reduce injected noise. The 8-SOIJ J-leads require a slightly larger PCB land pattern than standard SOIC-8 gull-wing parts - verify your CAD library against the Microchip package drawing before tape-out.
Pull-up resistors on SDA and SCL are mandatory because both lines are open-drain. Typical values are 4.7 kohm for VCC of 3.3V-5V and short buses (<100 mm); drop to 2.2 kohm for longer or heavily-loaded buses. For I2C Fast-mode Plus (>400 kHz) operation, choose 1 kohm to 2.2 kohm. Total bus capacitance including PCB traces, device pins, and any other slaves must stay below the standard I2C limit of 400 pF for 400 kHz operation.
Three pitfalls to avoid: (1) Do not float the WP pin - tie it explicitly to VCC (write-protect on) or GND (writes allowed); floating WP can pick up noise and randomly block writes. (2) After the last byte of a write, do not poll the device before the internal write cycle completes; use ACK polling only after the device has had time to enter write mode, or wait the full 5 ms maximum write time. (3) Do not exceed 128 bytes in a single page write - if more data is written, the address counter wraps and overwrites the start of the page.
The 24LC1025T-I/SM's 900 ns access time and 400 kHz max clock give generous timing margins at standard bus speeds. For long buses (>200 mm) or noisy environments, add a 100 ohm series resistor near the MCU end of SDA and SCL to dampen ringing, and verify signal integrity with an oscilloscope on the actual PCB rather than relying on simulation alone. The SDA and SCL rise/fall time is set by the bus pull-up resistor and total capacitance - aim for <300 ns rise time at 400 kHz.
규정 준수 정보
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; for automotive use, refer to Microchip's separately qualified 24LC1025 variants. J-lead SOIJ-8 package is lead-free matte-tin plated.
