DS1338Z-3+ I²C RTC with 56-Byte NV RAM | Maxim Integrated
N.º da peça: DS1338Z-3+ ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $1.2394 | $1,24 |
| 10 | $1.2394 | $12,39 |
| 100 | $1.2394 | $123,94 |
| 500 | $1.2394 | $619,70 |
| 1.000 | $1.2394 | $1.239,40 |
DS1338Z-3+ Visão geral
A real-time clock is a timekeeping integrated circuit that maintains calendar information independently of the system processor. The DS1338Z belongs to the RTC and clock/calendar hierarchy within time and memory management semiconductors. Its integrated NV SRAM gives an embedded system a small amount of persistent storage alongside the calendar, which is useful for counters, configuration records, alarms, or small state variables.
The DS1338Z automatically accommodates months with fewer than 31 days, according to the Analog Devices product description. The verified manufacturer pages identify the device as a full BCD clock/calendar with 56 bytes of NV SRAM. The -3 suffix distinguishes this orderable variant, while the Z package suffix corresponds to the 8-pin SOIC format shown in distributor listings. These facts are directly relevant when firmware relies on BCD-formatted registers or on persistent data surviving a reset and power cycle.
The I²C interface allows the host controller to read and write the clock, calendar, alarms, and SRAM registers serially. This reduces wiring compared with a parallel RTC and supports compact embedded systems. The verified distributor data identifies the component as an 8-SOIC device measuring 3.90 mm wide. Designers should follow the manufacturer datasheet for register addresses, electrical limits, timing, oscillator behavior, and pin assignments rather than infer them from the package outline.
Typical uses include industrial controllers, embedded instruments, data-acquisition equipment, access-control terminals, and compact embedded systems that need calendar timestamping with a small persistent memory area. In firmware, the RTC can maintain wall-clock time while the host sleeps, and the NV RAM can retain a limited amount of operating state. The -40°C to +85°C range and 2.7 V to 5.5 V supply range reported by LCSC make the part broadly compatible with embedded industrial and commercial environments.
The principal design consideration is verifying software compatibility with the exact BCD register map and I²C address behavior. Firmware must distinguish BCD time values from binary values, handle month-end rollover, and preserve intended SRAM contents across intentional resets and power loss. This page combines verified manufacturer and distributor information, pricing context as of 2026-10-23, package details, application guidance, and explicitly separated drop-in alternatives.
This product data is organized for engineers who need a verifiable DS1338Z-3+ purchasing reference. It distinguishes confirmed specifications from information that requires the manufacturer datasheet, avoids unsupported performance claims, and provides practical integration context for I²C real-time clock and nonvolatile memory designs.
Alternativas drop-in para DS1338Z-3+ — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
Nenhuma alternativa drop-in disponível para este produto.
Solicitar alternativasDS1338Z-3+ Especificações
| Product Type | I²C real-time clock and calendar with NV SRAM |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Faixa de temperatura de operação | -40°C to +85°C |
| Serial Interface | I²C, 2-wire |
| NV SRAM Capacity | 56 bytes |
| Calendar Encoding | Full binary-coded decimal (BCD) |
| Calendar Fields | Seconds, minutes, hours, day, date, month, and year |
| Month-End Adjustment | Automatic for months with fewer than 31 days |
| Encapsulamento | 8-pin SOIC, 3.90 mm width |
| Tipo de montagem | Surface-mount |
| Low-Power Operation | Low-power RTC operation |
| Status RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
Guia de Configuração de Pinos do DS1338Z-3+ 8-pin soic, 3.90 mm width
Configuração de pinos para DS1338Z-3+ (pacote 8-pin soic, 3.90 mm width). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para DS1338Z-3+.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
DS1338Z-3+ é adequado para 6 aplicaçãos: Industrial Data-Acquisition Timestamps, Embedded Access-Control Terminals, Battery-Powered Sensor Nodes, Data-Logging Measurement Instruments, Networked Monitoring Equipment, Compact Embedded Control Boards.
Industrial Data-Acquisition Timestamps
The DS1338Z-3+ fits industrial data-acquisition equipment that must label samples with calendar time even while the controller is busy processing data. Its I²C interface lets a host read seconds, minutes, hours, day, date, month, and year without a parallel data bus, while 56 bytes of NV SRAM can retain a compact event counter or operating-state record. The confirmed 2.7 V to 5.5 V supply range supports common embedded rails, and the -40°C to +85°C rating covers typical industrial enclosure conditions. Firmware must convert the full BCD values correctly and check oscillator or calendar status before accepting a timestamp.
Recomendado
Embedded Access-Control Terminals
The DS1338Z-3+ is useful in access-control terminals that need time-stamped transactions and a small amount of persistent operational data. The host controller can read the BCD calendar through I²C, associate access events with date and time, and use the 56-byte NV RAM for counters, configuration flags, or a short status record. The serial interface reduces pin count compared with a parallel RTC, which helps compact terminal designs. Firmware should define retention requirements clearly, because the exact backup-battery behavior and valid data-retention duration are not specified in the supplied excerpts and must be verified in the manufacturer datasheet.
Recomendado
Battery-Powered Sensor Nodes
The DS1338Z-3+ can support battery-powered sensor nodes that periodically wake, timestamp measurements, and then return to a low-power state. The RTC maintains calendar information independently of the sensor-processing microcontroller, while its 56 bytes of NV SRAM preserve a small amount of state across power cycles. The confirmed 2.7 V to 5.5 V operating range is compatible with common low-voltage embedded systems. Design effort should focus on the backup source, oscillator accuracy, and current consumption; those detailed values are not present in the verified excerpts and therefore must be obtained from the full manufacturer datasheet before sizing the energy budget.
Recomendado
Data-Logging Measurement Instruments
The DS1338Z-3+ is appropriate for compact measurement instruments that must associate readings with a calendar record and preserve a small local state record. The I²C clock/calendar provides seconds through year information in full BCD, allowing a host to create readable timestamps without implementing a complete calendar in software. The integrated 56-byte NV SRAM can hold parameters such as a sample sequence, alarm state, or a configuration marker. The 8-pin SOIC package is straightforward for conventional PCB assembly, but engineers should use the manufacturer pinout and verify the oscillator and backup-circuit requirements before finalizing the board.
Recomendado
Networked Monitoring Equipment
The DS1338Z-3+ fits monitoring equipment that combines local event logging with remote communications. A network-capable host can read the RTC through I²C, attach timestamps to alarms or samples, and retain limited counters in NV SRAM during outages. This can reduce the host's continuous timekeeping burden while providing a compact, low-power calendar peripheral. The verified 2.7 V to 5.5 V range supports common embedded rails, and the -40°C to +85°C range is appropriate for many deployed environments. Integration still requires validating I²C address settings, pull-up implementation, bus timing, and oscillator accuracy from the complete manufacturer documentation.
Recomendado
Compact Embedded Control Boards
The DS1338Z-3+ is well suited to compact control boards that need a real-time calendar without dedicating multiple processor pins to a parallel interface. The I²C connection allows the controller to share a two-wire bus with other compatible peripherals, while the 56-byte NV RAM provides a compact persistent area. In a new design, the device can record reset causes, operating modes, calibration identifiers, or event counters. The 8-SOIC package and confirmed 2.7 V to 5.5 V range are convenient for conventional embedded assemblies. Before release, check absolute maximum limits, decoupling requirements, pin names, and startup behavior against the DS1338-DS1338Z data sheet.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para DS1338Z-3+ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Do not choose it solely because a similarly named DS1338Z variant appears to fit. The supplied web results do not establish five verified drop-in alternatives with quantified differences, so DS1338Z-18+, DS1338Z-33+, and DS1340 variants should be treated as candidate cross-references until their exact pinout, voltage, timing, and register compatibility are checked. Compare alternatives based on the required calendar registers, NV RAM retention, oscillator accuracy, backup supply, I²C electrical behavior, temperature range, and lifecycle status rather than package name alone.
Comparação com alternativas
| Parâmetro | Este produto |
|---|---|
| Product Type | I²C RTC with 56-byte NV RAM |
| Brand | Maxim Integrated |
| Package | 8-pin SOIC |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Operating Temperature Range | -40°C to +85°C |
| Interface | I²C, 2-wire serial |
| NV SRAM | 56 bytes |
| Calendar Format | Full BCD |
| Verified Reference Price | From $1.2394 at LCSC as of 2026-10-23 |
Principais diferenciais
- Combines a calendar clock with persistent local storage (vs DS1338Z-18+)
- Serial host interface reduces parallel bus requirements (vs DS1338Z-33+)
- Verified broad supply and temperature coverage (vs DS1340Z-33+)
- Integrated full BCD calendar (vs Generic MCU-only timekeeping)
Notas de projeto
Follow the DS1338-DS1338Z manufacturer pinout and PCB layout guidance exactly. Place the required bypass capacitor close to the device supply pin, route the I²C signals away from noisy switching nodes, and use the package drawing rather than a distributor preview for land-pattern dimensions. Because the supplied excerpts do not include the complete pin table or recommended layout, engineers should verify pin names, exposed connections, and capacitor values before fabrication.
Treat the I²C bus as a shared serial resource. Confirm the DS1338Z-3+ address behavior from the manufacturer datasheet, choose pull-up values compatible with the bus voltage and capacitance, and account for rise time at the slowest attached device. Firmware should use legal repeated-start behavior where supported by the peripheral and avoid holding SDA low after a transaction. Pull-up and bus-capacitance calculations should use actual wiring and host parameters rather than the verified snippets alone.
The confirmed operating supply range is 2.7 V to 5.5 V, but the detailed current and backup-supply limits are not included in the supplied data. Before designing the power tree, determine the operating current, standby behavior, oscillator-startup requirements, and battery or supercapacitor sizing from the complete datasheet. Do not infer battery life from the broad supply range alone; an energy budget must use the device's measured or specified current under the actual clocking and I²C-access pattern.
The most important firmware pitfall is treating BCD calendar fields as binary integers. Convert each nibble according to the DS1338 register definitions, handle month-end rollover, and validate any oscillator or clock-integrity status reported by the device before accepting timestamps. Also distinguish NV SRAM retention from ordinary RAM: unexpected resets or power loss may affect application data, so the system should define what must survive and test the power-failure path explicitly.
Informações de conformidade
The supplied verified search results identify the function, interface, supply range, temperature range, package, and distributor listings but do not provide explicit RoHS, REACH, halogen-free, lead-free, or conflict-minerals statements. No compliance claim is inferred.
