DS1338C-3# I2C RTC with 56-Byte NV RAM | Analog Devices
MPN: DS1338C-3# ✗ Cuối đờiDS1338C-3# Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho DS1338C-3# — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với DS1338C-3# (cùng hình factor và footprint) — khác nhau ở Package, Product Type, Serial Interface, Calendar Fields, Device Type.
Không có bộ thay thế dễ dàng lắp đặt sẵn có cho sản phẩm này.
Yêu cầu các bộ thay thếDS1338C-3# Thông số kỹ thuật
| 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 |
| Hộp | 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 |
| Kiểu lắp đặt | Surface mount |
| Trạng thái RoHS | Compliant |
Hướng dẫn cấu hình chân DS1338C-3# 0.295 inch
Cấu hình chân cho DS1338C-3# (0.295 inch gói). Số thứ tự chân, chức năng và sơ đồ kết nối được xác định trong tài liệu thông số kỹ thuật của nhà sản xuất. Tham khảo nó để biết footprint và hướng dẫn hàn chính xác.
Không có dữ liệu chân cụ thể sẵn có cho DS1338C-3#.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
DS1338C-3# phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho DS1338C-3# — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này |
|---|---|
| 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 |
Bảo phân biệt quan trọng
- Integrated timekeeping and persistent storage (vsDS1337S+)
- Two-wire serial host interface (vsDS1338Z-33+)
- Defined supply range and package identity (vsDS1338UA-33+)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.