DS1338C-3# I2C RTC with 56-Byte NV RAM | Analog Devices
部品番号: DS1338C-3# ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
DS1338C-3# 概要
A real-time clock is a timekeeping integrated circuit that maintains calendar information when the main system clock is unavailable. Within the hierarchy of semiconductors, an RTC is a clock and timing IC, while the DS1338C adds digital data storage and serial host communication. This combination makes it useful for systems that need wall-clock timestamps, event scheduling, traceable boot records, or configuration retention during power interruptions.
The verified device information identifies seconds, minutes, hours, calendar data, I2C address and data transfer, 56-byte NV SRAM, and a 2.7V-to-5.5V supply range. Its NV memory can retain application data while the RTC supplies time and calendar information. Because both functions use one compact 16-pin SOIC device, a board can reduce its component count compared with separate RTC and memory packages.
The I2C interface allows a host microcontroller to read and write the clock/calendar and access the NV SRAM through serial transactions. Firmware must implement the device's register map, address conventions, and access sequence exactly as described in the manufacturer datasheet. The verified product data does not provide a complete timing table, oscillator calibration value, temperature range, or absolute maximum ratings, so those values must be verified before design release.
Typical uses include industrial controllers, data loggers, metering equipment, embedded instruments, and compact consumer products that retain timestamps or small configuration records. The DS1338C-3# is especially appropriate when the system already supports I2C and needs a dedicated timekeeping device rather than deriving time solely from a host microcontroller.
For a new PCB, preserve the manufacturer's recommended I2C pull-up arrangement, power decoupling, crystal connection, and exposed-pad requirements where applicable. Confirm the exact DS1338C-3# datasheet, package drawing, and ordering information before layout. This page synthesizes the verified device identity, distributor listing data, package information, and design guidance without inventing unprovided electrical values.
ドロップイン代替品: DS1338C-3# — 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。
クイック比較ツール — 並列比較する代替部品を選択:
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストDS1338C-3# 仕様
| Device Type | I2C real-time clock (RTC) with NV SRAM |
| Clock/Calendar Format | Full BCD clock/calendar |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Serial Interface | I2C, 2-wire serial |
| NV SRAM Capacity | 56 bytes |
| パッケージ | 16-pin SOIC |
| Package Width | 7.50 mm |
| Nominal Package Length | 0.295 inch |
| Timekeeping Functions | Seconds, minutes, hours, calendar |
| Data Transfer | Address and data transferred serially |
| Technology | CMOS |
| 実装タイプ | Surface mount |
| RoHS ステータス | Compliant |
DS1338C-3# 0.295 inch ピン配置ガイド
DS1338C-3# (0.295 inch パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: DS1338C-3#.
詳細は データシート をご参照ください。
主な用途
DS1338C-3# の用途: 6 件s: Industrial Data Logger, Embedded Instrumentation, Metering and Energy Measurement, IoT Sensor Gateway, Secure Access and Event Tracking, Compact Consumer Electronics.
Industrial Data Logger
The DS1338C-3# fits an industrial data logger that must timestamp measurements independently of its host controller. Its I2C interface allows the logger MCU to retrieve seconds, minutes, hours, and calendar data over a shared two-wire bus, while the 56-byte NV SRAM can hold compact metadata or calibration values. The 2.7V-to-5.5V supply range supports low-voltage embedded systems, but the designer should verify oscillator accuracy and current consumption for the intended logging interval and power budget.
おすすめ
Embedded Instrumentation
The DS1338C-3# is appropriate for measurement instruments that need traceable event times and persistent operating records. A host processor can read the BCD clock/calendar through I2C and associate readings with a measurement sequence, while the NV RAM provides a small place for configuration or counter data. Compared with relying only on a software timer, the dedicated RTC continues its timekeeping function independently. Exact timing accuracy and retention limits require the official datasheet.
おすすめ
Metering and Energy Measurement
The DS1338C-3# can provide a real-time reference for metering equipment that records consumption intervals, maintenance events, or configuration changes. The 16-pin SOIC package is useful when the meter has limited PCB area, and the 2.7V-to-5.5V range can fit common low-voltage rails. Firmware must handle BCD conversion, calendar rules, and I2C error recovery correctly. NV RAM retention and write behavior should be validated against the intended power-loss conditions.
おすすめ
IoT Sensor Gateway
The DS1338C-3# suits an IoT gateway that must associate sensor events with a consistent timestamp even when the main processor restarts. I2C connectivity keeps the connection compact, and the RTC's clock/calendar can support event ordering, scheduling, and daily logging. The 56-byte NV SRAM may store short configuration records, though it is too small for general event buffering. A gateway with strict power constraints should verify standby current and oscillator start behavior from the datasheet.
おすすめ
Secure Access and Event Tracking
The DS1338C-3# can support access-control or asset-tracking equipment that needs event time stamps and a small amount of persistent state. The host MCU can read calendar registers over I2C and store compact identifiers or counters in the 56-byte NV SRAM. This is not a replacement for a secure cryptographic memory device; it is a timekeeping and small-storage solution. Validate power-loss tolerance, access-control functions, and system security requirements separately.
おすすめ
Compact Consumer Electronics
The DS1338C-3# is useful in compact consumer products that need a real-time reference for display logs, alarm scheduling, setup history, or service diagnostics. Its 16-pin SOIC package provides a defined surface-mount footprint, and the I2C interface avoids dedicating many host GPIO pins. The 2.7V-to-5.5V operating range supports embedded rails, but battery-powered products should confirm standby consumption and battery-life impact. Firmware should handle clock initialization and calendar rollover according to the datasheet.
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: DS1338C-3# — 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 |
|---|---|
| Brand | Analog Devices |
| Package | 16-pin SOIC |
| Supply Voltage | 2.7V to 5.5V |
| Interface | I2C two-wire serial |
| NV SRAM | 56 bytes |
| Clock/Calendar | Full BCD clock/calendar |
| Calendar Fields | Seconds, minutes, hours, calendar |
| Technology | CMOS |
| RoHS | Compliant |
主な差別化要因
- Integrated timekeeping and persistent storage （vs DS1337S+)
- Two-wire serial host interface （vs DS1338Z-33+)
- Defined supply range and package identity （vs DS1338UA-33+)
設計ノート
The verified supply range is 2.7V to 5.5V, so the host rail, I2C pull-up voltage, and RTC supply must be selected together. Confirm the device's absolute maximum ratings and operating current from the manufacturer datasheet before connecting a rail. Decoupling requirements and allowable bus voltage levels were not included in the supplied data, so do not infer capacitor values or pull-up resistor values from this page.
Treat the I2C SDA and SCL nets as a defined two-wire bus. Place any required pull-ups close to the bus master or according to the manufacturer guidance, and keep the routing short away from noisy switching nodes. The verified data confirms I2C communication but does not provide bus capacitance, rise-time, or frequency limits; obtain those values from the datasheet before setting the firmware timing.
Do not assume that DS1338-family comparison results prove drop-in compatibility. Verify every pin, the I2C address, oscillator connection, register map, calendar behavior, NV RAM access, and package drawing against the exact datasheet. The supplied cross-reference results mention DS1337S+, DS1338Z-33+, and DS1338UA-33+, but they do not provide sufficient verified evidence to approve any of them as a direct replacement.
Use the manufacturer's SOIC-16 land pattern and pin-1 orientation when laying out the board. Preserve the recommended crystal, load, and bypass-capacitor placement if the selected DS1338C-3# variant includes an external oscillator. Because the supplied verified data confirms the package family but not the complete footprint or pin table, release PCB artwork only after checking the current manufacturer package drawing.
コンプライアンス情報
The supplied FindIC result identifies DS1338C-3# as RoHS compliant. No verified REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statement was provided. The device is an RTC/clock IC, so AEC-Q100 is not applicable in the supplied data.
