24AA16-I/SN - 16Kbit I2C EEPROM, 1.7V-5.5V, 400kHz | Microchip
部品番号: 24AA16-I/SN ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.49 | $0.49 |
| 10 | $0.44 | $4.40 |
| 100 | $0.39 | $39.00 |
| 500 | $0.34 | $170.00 |
| 1,000 | $0.3 | $300.00 |
| 2,500 | $0.27 | $675.00 |
24AA16-I/SN 概要
A serial EEPROM (Electrically Erasable Programmable Read-Only Memory) is a non-volatile memory device that communicates with a host microcontroller through a small pin count serial protocol, retaining data without power. EEPROM belongs to the broader non-volatile memory family alongside Flash and ROM, but is byte-erasable, ideal for storing small, frequently updated configuration parameters. Within a system hierarchy, the 24AA16 functions as a memory IC > EEPROM > serial EEPROM > I2C EEPROM > non-volatile memory > semiconductor, commonly used to store user settings, calibration data, and device IDs.
Key features include a low standby current of 1 uA (typical) and active read current of 1 mA, hardware write-protection capability through the WP pin, and a page write buffer that supports up to 16 bytes of data per write cycle. The 24AA16-I/SN operates across the industrial temperature range of -40C to +85C and supports a minimum of 1 million erase/write cycles with data retention of more than 200 years.
The 24AA16 uses CMOS technology and is offered in three speed grades: the 24AA16 (1.7V-5.5V, 400 kHz), the 24LC16B (2.5V-5.5V, 400 kHz), and the 24FC16 (1.7V-5.5V, 1 MHz). The I2C interface supports standard (100 kHz) and fast (400 kHz) modes, and the device is hardware-compatible with industry-standard I2C bus specifications. The eight 256-byte blocks enable block-write protection and selective data updates.
Typical applications include consumer electronics for storing user preferences, industrial control for calibration constants and serial numbers, medical devices for patient data and device configuration, automotive accessory modules, and smart metering. It is well-suited to IoT endpoints that need persistent parameter storage with low standby current.
When designing with this device, place a 0.1 uF decoupling capacitor close to the VCC pin and respect the maximum I2C bus capacitance. The WP pin can be tied low or high to enable or disable write protection; leaving it floating risks accidental write-lock state.
This page combines verified distributor pricing, drop-in alternatives, and practical design notes that are not found in the manufacturer datasheet alone, giving procurement and engineering teams a single decision-ready reference for the 24AA16-I/SN.
ドロップイン代替品: 24AA16-I/SN — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: 24AA16-I/SN （同一形状・フットプリント） — 相違点: Memory Size, Package, Standby Current, Active Read Current, Data Retention.
クイック比較ツール — 並列比較する代替部品を選択:
24LC16B-I/SN
✅ ドロップイン📋 参考代替品（カタログ未掲載）
24FC16-I/SN
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BR24L16F-WE2
✅ ドロップイン📋 参考代替品（カタログ未掲載）
M24C16-RMN6TP
✅ ドロップイン✓ 在庫あり
$0.25 / 個
データシートを見る →24AA16-I/SN 最大定格＆電気的特性
| メモリタイプ | EEPROM (Electrically Erasable Programmable ROM) |
| メモリサイズ | 16 Kbit (2K x 8) |
| Memory Organization | 8 blocks of 256 x 8 bits |
| インターフェース | I2C (2-wire serial) |
| 最大クロック周波数 | 400 kHz |
| Access Time | 900 ns |
| Supply Voltage (VCC) | 1.7 V to 5.5 V |
| Standby Current | 1 uA (typical) |
| Active Read Current | 1 mA (typical) |
| Write Cycle Time (Page) | 5 ms (max, page write) |
| Write Endurance | 1,000,000 erase/write cycles |
| Data Retention | More than 200 years |
| Hardware Write Protection | Yes (WP pin) |
| 動作温度 | -40C to +85C (Industrial) |
| パッケージ | 8-pin SOIC (SN) |
| 実装タイプ | Surface Mount |
| Logic Family | CMOS |
| RoHS ステータス | Compliant |
24AA16-I/SN ピン構成
| ピン 1 | A0 — Device address input bit 0 (tie to VCC or VSS) |
| ピン 2 | A1 — Device address input bit 1 (tie to VCC or VSS) |
| ピン 3 | A2 — Device address input bit 2 (tie to VCC or VSS) |
| ピン 4 | VSS — Ground |
| ピン 5 | SDA — I2C serial data (open-drain, requires pull-up) |
| ピン 6 | SCL — I2C serial clock (input) |
| ピン 7 | WP — Write-protect input (high disables writes to upper array) |
| ピン 8 | VCC — Positive supply voltage (1.7V to 5.5V) |
主な用途
24AA16-I/SN の用途: 6 件s: Industrial Sensor Calibration Storage, Consumer Electronics User Settings, Medical Device Parameter Logging, IoT Endpoint Configuration Memory, Automotive Accessory Module Memory, Smart Metering and Energy Monitoring.
Industrial Sensor Calibration Storage
The 24AA16-I/SN stores calibration coefficients and serial numbers in industrial sensors such as pressure transmitters, flow meters, and temperature probes. Its 1.7V to 5.5V supply range supports direct connection to 3.3V microcontroller rails, while 1M write cycles accommodate factory re-calibration events. The 1uA standby current is negligible against the sensor's own bias power, and the SOIC-8 footprint simplifies PCBA layout for compact field-mountable housings.
おすすめ
Consumer Electronics User Settings
The 24AA16-I/SN provides persistent storage for user preferences such as display brightness, audio EQ presets, last-channel memory, and language selection in TVs, audio receivers, and white goods. With 2Kbytes organized as 8 blocks, designers can allocate separate blocks to different functional subsystems (e.g., audio, video, network) and selectively write-protect critical configuration regions via the WP pin, preventing accidental corruption during power glitches.
おすすめ
Medical Device Parameter Logging
The 24AA16-I/SN stores patient session parameters, device configuration, and usage counters in portable medical devices such as glucose meters, nebulizers, and TENS units. Its 200-year data retention and 1M write endurance meet the lifetime requirements of home-health products, while the 1.7V minimum supply enables operation directly from a single coin-cell or Li-Ion backup during battery replacement. The SOIC-8 footprint supports miniaturized PCB layouts required for wearable form factors.
おすすめ
IoT Endpoint Configuration Memory
The 24AA16-I/SN is ideal for IoT endpoints such as Wi-Fi thermostats, smart locks, and asset trackers that need persistent configuration storage for Wi-Fi credentials, MQTT endpoints, and security tokens. Its 1 uA standby current contributes negligibly to sleep-mode energy budgets, while 400 kHz I2C clock is sufficient for occasional small-payload reads during wake cycles. Block-write protection enables security tokens to be locked while other regions remain user-modifiable.
おすすめ
Automotive Accessory Module Memory
The 24AA16-I/SN is used in aftermarket automotive modules (dashcams, alarm systems, parking sensors) for storing user-set thresholds, event logs, and last-state memory. The industrial -40C to +85C temperature rating handles cabin and trunk environments, and 1M write cycles accommodate frequent status updates from vibration or proximity sensors. Hardware write-protection via the WP pin prevents firmware bugs from corrupting critical calibration data.
おすすめ
Smart Metering and Energy Monitoring
The 24AA16-I/SN stores tariff schedules, cumulative energy registers, and tamper-event counters in electricity, water, and gas meters. Its 200-year data retention exceeds the typical 20-year meter service life, while 1M write cycles handle cumulative-energy updates every few seconds over the device lifetime. The wide 1.7V to 5.5V supply range supports operation from backup supercapacitors during main-power failures.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: 24AA16-I/SN — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 24LC16B-I/SN | 24FC16-I/SN | BR24L16F-WE2 | M24C16-RMN6TP |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | ROHM Semiconductor | STMicroelectronics |
| Package | 8-SOIC (SN) | 8-SOIC (SN) | 8-SOIC (SN) | 8-SOIC | 8-SOIC |
| Memory Density | 16 Kbit (2K x 8) | 16 Kbit | 16 Kbit | 16 Kbit | 16 Kbit |
| VCC Range | 1.7 V to 5.5 V | 2.5 V to 5.5 V | 1.7 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Max Clock Frequency | 400 kHz | 400 kHz | 1 MHz | 400 kHz | 400 kHz |
| Standby Current | 1 uA | 1 uA | 1 uA | 2 uA | 1 uA |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Write Endurance | 1,000,000 cycles | 1,000,000 cycles | 1,000,000 cycles | 1,000,000 cycles | 1,000,000 cycles |
主な差別化要因
- Widest supply voltage range in the 24XX16 family （vs 24LC16B-I/SN)
- Lower cost than 1 MHz Fast-mode Plus variant （vs 24FC16-I/SN)
- Drop-in footprint compatibility with major cross-brand EEPROMs （vs BR24L16F-WE2 (ROHM))
設計ノート
Floating WP pin risk: the WP (write-protect) input on pin 7 must be tied either to VCC or to VSS through a known logic level. If left floating, the WP input may sample a high level after power-up and permanently disable writes to the upper memory array (addresses 0x0800 to 0x0FFF). Source: Microchip 24AA16/24LC16B/24FC16 datasheet, write-protection description.
Add a 0.1 uF decoupling capacitor as close as possible to the VCC pin (pin 8) and a bulk capacitor if the supply rail is shared with switching converters. The I2C bus lines SDA and SCL are open-drain and require external pull-up resistors (typically 4.7 kohm to 10 kohm depending on bus capacitance and speed). Total bus capacitance should not exceed 400 pF to stay within Fast-mode timing.
Page-write timing: the 24AA16 supports up to 16-byte page writes. Per the Microchip datasheet, sending more than 16 bytes in a single write cycle will roll over and overwrite the beginning of the same page. For arbitrary-length writes, split data into 16-byte chunks and poll the device with a current-address read (or use ACK polling) between writes to avoid data corruption.
Multi-device bus addressing: the 24AA16 uses a 4-bit device address comprising the fixed 1010 prefix plus three hardware pins (A0, A1, A2). Per the datasheet, eight 24AA16 devices can coexist on a single I2C bus by hard-strapping different A0/A1/A2 combinations, giving a system total of 128 Kbits. Tie unused address pins to known logic levels to prevent bus-address conflicts during enumeration.
コンプライアンス情報
RoHS and REACH compliance per Microchip product documentation. The 24AA16-I/SN industrial grade is not AEC-Q100 qualified; for automotive applications request the AEC-Q100 qualified grade from Microchip.
