24LC1025-I/SM - 1Mb I2C Serial EEPROM | Microchip Technology
Teilenummer: 24LC1025-I/SM ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $3.93 | $3,93 |
| 10 | $3.49 | $34,90 |
| 100 | $2.81 | $281,00 |
| 500 | $2.42 | $1.210,00 |
| 1.000 | $2.1 | $2.100,00 |
24LC1025-I/SM Übersicht
A Serial EEPROM is a type of non-volatile memory (NVM) that retains stored data without continuous power and communicates serially over a low-pin-count bus. In the broader memory hierarchy, EEPROMs sit between flash and SRAM - slower than flash but offering byte-level erase and write granularity without needing block buffers. The I2C interface used by the 24LC1025 reduces wiring to just two signal lines (SDA, SCL), allowing up to four devices on a bus (two 24LC1025 address bits plus two fixed high-order bits) while saving board space compared to parallel EEPROM or NOR flash alternatives.
Key features include a maximum read/write supply current of 3 mA active and 1 uA standby typical, more than 1 million erase/write cycles endurance per page, and greater than 200 years of data retention. The cascadable architecture allows two 24LC1025 devices to be addressed on the same bus, providing a simple upgrade path to 2 Mbit non-volatile storage. The SOIJ-8 (SM) package has an industrial temperature rating of -40 C to +85 C, making it suitable for harsh-environment deployment.
The internal architecture uses a CMOS floating-gate cell array with on-chip charge pump generation, providing byte and page write modes with automatic erase-before-write and ACK polling capability. The device supports both standard (100 kHz) and fast (400 kHz) I2C modes, with input filtering on both SDA and SCL to suppress bus noise and ensuring robust communication in electrically noisy environments such as motor control or industrial PLC systems.
Typical applications include data logging in personal communications and metering equipment, industrial controllers requiring parameter storage, black-box event recorders in automotive aftermarket accessories, and I2C-based configuration storage on microcontroller co-processor boards. The cascadable addressing scheme also makes it a good fit for audio/video equipment storing user preferences and calibration tables.
When designing with the 24LC1025-I/SM, allow adequate VCC decoupling (a 0.1 uF ceramic capacitor close to the power pin) and observe the write-cycle timing of 5 ms maximum per page. Hardware write-protect (WP tied to VCC) prevents accidental writes during power transitions, which is critical for mission-critical parameter storage.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in-Alternativen für 24LC1025-I/SM – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit 24LC1025-I/SM (gleiche Bauform und Footprint) – abweichend in Memory Type, Package, Memory Size, Endurance, Operating Temperature.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
24FC1025-I/SM
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
24AA1025-I/SM
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
24AA256-I/SN
✅ Drop-In✓ Auf Lager
$0.39 / Stück
Datenblatt ansehen →24AA256UIDT-I/SN
✅ Drop-In✓ Auf Lager
$0.94 / Stück
Datenblatt ansehen →24AA64T-E/MS
✅ Drop-In✓ Auf Lager
$0.31 / Stück
Datenblatt ansehen →24AA16-I/SN
✅ Drop-In✓ Auf Lager
$0.27 / Stück
Datenblatt ansehen →24AA02E48-I/OT
✅ Drop-In✓ Auf Lager
$0.38 / Stück
Datenblatt ansehen →24FC1025-I/SN
✅ Drop-In✓ Auf Lager
$1.95 / Stück
Datenblatt ansehen →24LC1025-I/SM Technische Daten
| Speichertyp | Non-Volatile EEPROM (Serial) |
| Speichergröße | 1 Mbit (128 K x 8) |
| Memory Organization | 128 KB x 8 |
| Schnittstelle | I2C (2-wire serial) |
| I2C Bus Frequency | 400 kHz (Fast-mode) |
| Operating Voltage Range | 2.5 V to 5.5 V |
| Access Time | 900 ns |
| Page Write Size | 128 bytes |
| Endurance | >1,000,000 erase/write cycles per page |
| Data Retention | >200 years |
| Write Cycle Time (max) | 5 ms |
| Active Supply Current (Read/Write) | 3 mA max |
| Standby Current | 1 uA typical |
| Betriebstemperatur | -40 C to +85 C (Industrial) |
| Gehäuse | 8-SOIJ (SM), 5.23 mm x 5.23 mm |
| Montageart | Surface Mount |
| Write Protection | Hardware WP pin |
| RoHS-Status | Compliant |
24LC1025-I/SM Pin-Konfiguration
| Pin 1 | A0 — Device address input (bit 0) |
| Pin 2 | A1 — Device address input (bit 1) |
| Pin 3 | A2 — No connect (internally tied high) |
| Pin 4 | VSS — Ground |
| Pin 5 | SDA — Serial data (open-drain, requires pull-up) |
| Pin 6 | SCL — Serial clock input |
| Pin 7 | WP — Write protect (high = write-protected, low = writes enabled) |
| Pin 8 | VCC — Supply voltage (2.5 V to 5.5 V) |
Typische Anwendungen
24LC1025-I/SM ist geeignet für 6 Anwendungs: Industrial Data Logging, Smart Metering and Energy Monitoring, Automotive Aftermarket Accessories, Audio/Video Equipment User Settings, IoT Sensor Nodes and Edge Devices, Industrial Controller Parameter Backup.
Industrial Data Logging
The 24LC1025-I/SM fits industrial data logging with its 128 KB capacity storing months of sensor readings, 2.5 V-5.5 V supply margin for 24 V system-derived rails, and -40 C to +85 C industrial temperature rating. The 128-byte page write (5 ms typical) lets a host log events at moderate rates without buffering complexity, while ACK polling avoids firmware blocking delays. Compared with serial flash, the EEPROM's byte-level erase-before-write and >1M cycle endurance suit continuous logging over years without block wear-leveling.
Empfohlen
Smart Metering and Energy Monitoring
For smart electricity, water, and gas meters, the 24LC1025-I/SM provides reliable non-volatile storage of consumption history, tariff tables, and calibration constants. Its >200-year data retention exceeds typical 15-20 year meter service life, and >1M write endurance supports sub-hourly interval writes over decades. The cascadable addressing allows two devices on one bus for 2 Mbit capacity, doubling the storage envelope for high-resolution interval metering. The 8-SOIJ package handles reflow soldering and harsh meter enclosures.
Empfohlen
Automotive Aftermarket Accessories
In dashcams, GPS loggers, OBD-II dongles, and head-unit accessories, the 24LC1025-I/SM stores event recordings, user preferences, and last-known state across power cycles. The 128 KB capacity holds configuration data and error logs, while the 5 V tolerance interfaces directly with automotive 12 V-derived rails. The cascadable 1 Mbit addressing enables modular expansion for richer feature sets. Though not AEC-Q100 qualified, it is widely used in non-safety automotive accessories where -40 C to +85 C industrial rating suffices.
Empfohlen
Audio/Video Equipment User Settings
The 24LC1025-I/SM is ideal for storing user preferences, EQ curves, calibration tables, and last-source memory in audio amplifiers, AV receivers, and professional mixing consoles. The 128 KB capacity is sufficient for multi-band EQ presets and speaker compensation tables per channel. The 2.5 V-5.5 V supply works with both analog 5 V rails and modern 3.3 V DSP platforms. Its low 1 uA standby current preserves battery-backed settings in portable recording gear without draining backup cells.
Empfohlen
IoT Sensor Nodes and Edge Devices
For battery-powered IoT sensors and edge gateways, the 24LC1025-I/SM provides 128 KB of offline buffering when connectivity is intermittent, queueing messages for cloud upload. The 1 uA standby current is negligible in deep-sleep modes, and the >1M write endurance supports years of event buffering. The cascadable addressing enables multi-modal sensors with separate configuration and data EEPROMs on a shared bus. The 8-SOIJ package is small enough for compact sensor PCB layouts.
Empfohlen
Industrial Controller Parameter Backup
PLC and industrial controller designs use the 24LC1025-I/SM to back up PLC ladder logic parameters, PID tuning constants, and recipe data. The hardware WP pin enables firmware-only write protection during firmware updates, preventing corruption. With -40 C to +85 C operation and 200-year retention, the part meets industrial control lifetime expectations. The 400 kHz I2C speed is compatible with most PLC backplane buses, and the 8-SOIJ footprint is footprint-compatible with 8-SOIC and 8-TSSOP variants for layout flexibility.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für 24LC1025-I/SM – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | 24FC1025-I/SM | 24AA1025-I/SM | 24AA256-I/SN | 24AA256UIDT-I/SN | 24AA64T-E/MS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-SOIJ (SM) | 8-SOIJ (SM) - same | 8-SOIJ (SM) - same | 8-SOJ (SN) - footprint-compatible family | 8-SOJ (SN) - footprint-compatible family | 8-MSOP (MS) - footprint-compatible family |
| Memory Size | 1 Mbit (128 K x 8) | 1 Mbit (128 K x 8) | 1 Mbit (128 K x 8) | 256 Kbit (-75%) | 256 Kbit (-75%) | 64 Kbit (-93.75%) |
| Operating Voltage | 2.5 V to 5.5 V | 1.7 V to 5.5 V (wider) | 1.7 V to 5.5 V (wider) | 1.7 V to 5.5 V (wider) | 1.7 V to 5.5 V (wider) | 1.7 V to 5.5 V (wider) |
| Max I2C Clock | 400 kHz | 1 MHz (faster) | 400 kHz | 400 kHz | 400 kHz | 400 kHz |
| Page Write Size | 128 bytes | 128 bytes | 128 bytes | 64 bytes | 64 bytes | 32 bytes |
| Write Endurance | >1,000,000 cycles | >1,000,000 cycles | >1,000,000 cycles | >1,000,000 cycles | >1,000,000 cycles | >1,000,000 cycles |
| Data Retention | >200 years | >200 years | >200 years | >200 years | >200 years | >200 years |
Wichtigste Unterscheidungsmerkmale
- Highest-density I2C EEPROM from Microchip with cascadable addressing (vs. 24AA256-I/SN)
- Best-in-class data retention >200 years (vs. 24FC1025-I/SM)
- Industrial 2.5 V-5.5 V voltage range optimized for 3.3 V/5 V systems (vs. 24AA1025-I/SM)
- 8-SOIJ J-lead package for harsh-environment reliability (vs. 24AA64T-E/MS (8-MSOP))
Designhinweise
Estimated: place a 0.1 uF ceramic decoupling capacitor as close as possible to the VCC pin (pin 8) of the 24LC1025-I/SM. The EEPROM draws up to 3 mA during write cycles, and inadequate VCC decoupling can cause VCC droop that interrupts the write and corrupts memory. A bulk 1 uF to 10 uF tantalum or ceramic capacitor in parallel is recommended for write-heavy applications, especially if the supply rail is shared with high-current switching devices. Ensure the power supply ramp-up time does not exceed the datasheet's VCC rise specification.
Both SDA and SCL are open-drain and require external pull-up resistors. Typical values are 4.7 kohm at 400 kHz with 5 V supply, or 2.2 kohm-10 kohm at 3.3 V. The datasheet specifies input filtering that suppresses bus glitches up to 50 ns. Keep the I2C bus length under 1 meter for reliable 400 kHz operation, and avoid routing SDA/SCL parallel to switching signals for more than a few centimeters to prevent capacitive coupling. Place a series resistor of 100 ohm at the MCU end if long traces are unavoidable.
Do not omit the WP pin connection - if left floating, the WP pin can drift and randomly enable or disable write protection. Tie WP to VSS (ground) for normal write operation, or to VCC for full-time write protection. Per the Microchip datasheet 20001941L, when WP is high the entire memory array is write-protected regardless of software control. For firmware updates, drive WP low before issuing write commands and return it high afterward to prevent accidental writes during brown-out events.
The 8-SOIJ (SM) package has a 'J-lead' bend that requires specific land pattern geometry - the SOIJ footprint is similar to but not identical to 8-SOIC. Refer to Microchip's land pattern specification in the package drawing. Allow adequate clearance under the J-lead bend for cleaning flux residues, especially in no-clean flux processes. For high-vibration applications, the J-lead provides better mechanical compliance than gull-wing SOIC leads, making SOIJ preferred for automotive and industrial deployments.
Estimate: total quiescent current draw is dominated by the I2C pull-up resistors when the bus is idle (typically 0.7 mA at 5 V with 4.7 kohm pull-ups on SDA and SCL). In battery-backed designs, use higher-value pull-ups (10-100 kohm) or switch off the pull-ups via a MOSFET when the EEPROM is in deep sleep. Note that the 24LC1025-I/SM itself draws only 1 uA standby, so the pull-up current is the dominant standby budget item.
Compliance-Informationen
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - not intended for automotive safety-critical applications. Lead-free reflow-compatible per JEDEC J-STD-020. Halogen-free status not specified in the verified data - mark as unknown.
