DS1307ZN+T&R/C02 - 56B I2C RTC | Maxim Integrated
N.º de pieza: DS1307ZN+T&R/C02 ✗ Fin de vidaDS1307ZN+T&R/C02 Descripción general
A real-time clock is a timekeeping integrated circuit that continues tracking calendar time independently of the host processor's main clock. The DS1307 belongs to the hierarchy of clock and timing integrated circuits, serial real-time clocks, and battery-backed timekeeping devices. Unlike a simple counter or digital display, it provides decoded calendar data, programmable clock and calendar registers, and 56 bytes of SRAM for application-specific data.
Key features include a low-power BCD clock and calendar, 56 bytes of NV SRAM, a two-wire bidirectional I2C serial interface, and operation from 4.5 V to 5.5 V. The manufacturer describes the time format as HH:MM:SS in either 12-hour or 24-hour operation, while the date format is YY-MM-DD-dd. Calendar information includes seconds, minutes, hours, day, date, month, and year.
The device is accessed through a serial I2C bus, allowing the host controller to read or update time while using pull-up resistors on the bus. The clock/calendar section and the 56-byte NV SRAM share the same serial interface. This integration reduces the number of external timing components required in embedded systems while retaining battery-backed state when the system supply is removed.
Typical uses include embedded instrumentation, industrial control panels, data-acquisition equipment, consumer appliances, and microcontroller systems that require a calendar timestamp after power loss. The same physical 8-SOIC footprint can simplify prototype transitions to a qualified PCB layout, although pull-up placement, backup-battery compatibility, oscillator stability, and decoupling remain application-specific concerns.
The primary design consideration is preserving clean I2C communication while the RTC operates from a 5 V rail. Keep the I2C pull-ups and decoupling capacitors close to their associated devices, confirm that the host logic levels are compatible with the bus, and provide the backup source required by the application. Review the manufacturer datasheet before finalizing the crystal, backup-cell, and layout implementation.
This page consolidates the verified manufacturer and distributor information for the DS1307ZN+T&R/C02, adds practical RTC design guidance, and clearly identifies where package, pinout, temperature, pricing, and lifecycle details still require verification.
Alternativas directas para DS1307ZN+T&R/C02 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con DS1307ZN+T&R/C02 (mismo factor de forma y huella) — difiere en Package, End-of-Month Adjustment, Product Type, Register Organization, Serial Interface.
DS1307ZN+
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Ver hoja de datos →DS1307Z+
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Ver hoja de datos →DS1307ZN+T&R/C02 Especificaciones
| Device Type | Serial real-time clock and calendar |
| Timekeeping Format | Full binary-coded decimal (BCD) |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Serial Interface | I2C, 2-wire bidirectional serial |
| NV SRAM Capacity | 56 bytes |
| Calendar Data | Seconds, minutes, hours, day, date, month, and year |
| Date Format | YY-MM-DD-dd |
| Time Format | HH:MM:SS, 12/24-hour |
| End-of-Month Adjustment | Automatic adjustment for months with fewer than 31 days |
| Encapsulado | 8-SOIC (0.154 inch, 3.90 mm width) |
| Tipo de montaje | Surface mount |
| Maximum Supply Voltage | 5.5 V |
| Minimum Supply Voltage | 4.5 V |
| Estado RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
Guía de configuración de pines de DS1307ZN+T&R/C02 8-soic (0.154 inch, 3.90 mm width)
Configuración de pines para DS1307ZN+T&R/C02 (encapsulado 8-soic (0.154 inch, 3.90 mm width)). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para DS1307ZN+T&R/C02.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
DS1307ZN+T&R/C02 es adecuado para 6 aplicacións: Embedded Data-Acquisition Systems, Industrial Control and Monitoring Panels, Consumer Appliance Timekeeping, Battery-Backed Instrumentation, Network and Communications Equipment, Microcontroller-Based Products.
Embedded Data-Acquisition Systems
The DS1307ZN+T&R/C02 fits embedded data-acquisition equipment that must timestamp samples with calendar-accurate time after a mains interruption. Its full BCD clock exposes seconds, minutes, hours, day, date, month, and year, while automatic end-of-month adjustment prevents invalid dates in shorter months. The 56 bytes of NV SRAM can retain a small device identifier, calibration flag, or configuration record. Operate the part from the verified 4.5 V to 5.5 V range and read it through the two-wire I2C interface; confirm pull-up values and backup-battery support against the complete datasheet before production release.
Recomendado
Industrial Control and Monitoring Panels
Industrial monitoring panels can use the DS1307ZN+T&R/C02 to maintain an event timestamp independently of the main controller's software clock. The device supplies date and time in YY-MM-DD-dd and HH:MM:SS formats, including selectable 12-hour or 24-hour presentation, which simplifies structured logging by a host processor. Its 56-byte NV SRAM provides limited persistent storage for counters or setup flags. Because the supplied excerpts do not verify the temperature rating or compliance status, industrial deployment requires review of the full manufacturer datasheet and qualification records rather than assuming suitability for every environmental condition.
Recomendado
Consumer Appliance Timekeeping
The DS1307ZN+T&R/C02 is suitable for consumer appliances that need date, time, and limited persistent configuration across power cycles. A host microcontroller can access the BCD clock and 56-byte NV SRAM over I2C, avoiding a separate dedicated nonvolatile storage component for small amounts of data. Automatic handling of months with fewer than 31 days supports reliable calendar timestamps without host-side correction for those months. The verified 4.5 V to 5.5 V supply range supports nominal 5 V power systems, but the complete datasheet should be consulted for backup-cell requirements, electrical limits, and the exact recommended external components.
Recomendado
Battery-Backed Instrumentation
For portable test and measurement equipment, the DS1307ZN+T&R/C02 can preserve a timestamp and 56 bytes of NV SRAM while the main supply is unavailable. This permits records to be associated with the correct day and time after power restoration instead of relying on a host controller's volatile real-time counter. The device's low-power BCD clock/calendar and two-wire serial interface fit a compact embedded architecture. The exact backup source, oscillator behavior, leakage contribution, and low-voltage retention limits are not included in the verified snippets, so the complete manufacturer datasheet must guide the battery and power-fail implementation.
Recomendado
Network and Communications Equipment
Communications equipment can use the DS1307ZN+T&R/C02 for local timestamps, boot logs, and configuration persistence when a server or network time source is unavailable. The I2C clock/calendar provides structured seconds through year information, while the 56-byte NV SRAM can hold limited state that should survive a reset. This is useful in gateways, controllers, and network appliances requiring a simple local time reference. Verify I2C bus capacitance, pull-up voltage, address configuration, and bus isolation before adding the device to a multi-node system because those implementation details are not quantified in the supplied distributor excerpts.
Recomendado
Microcontroller-Based Products
The DS1307ZN+T&R/C02 complements microcontrollers that need a separate calendar clock rather than a simple monotonic timer. The host reads decoded seconds, minutes, hours, day, date, month, and year over I2C, allowing it to construct reliable event records while the RTC maintains time independently. The 56-byte NV SRAM is useful for a device serial number fragment, boot count, or operating flag. The verified 4.5 V to 5.5 V range and 8-SOIC package support integration into a 5 V embedded board, although the MCU, pull-up network, backup source, and oscillator components must be checked against the full datasheet.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para DS1307ZN+T&R/C02 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | DS1307ZN+ | DS1307Z+ |
|---|---|---|---|
| Device Type | Serial RTC and clock/calendar with 56-byte NV SRAM | Serial RTC and clock/calendar with 56-byte NV SRAM | DS1307-family real-time clock |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 8-SOIC (0.154 inch, 3.90 mm width) | 8-SOIC (0.154 inch, 3.90 mm width) - same | 8-SOIC (0.154 inch, 3.90 mm width) - same |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Serial Interface | I2C, 2-wire bidirectional serial | I2C, 2-wire bidirectional serial | I2C, 2-wire bidirectional serial |
| NV SRAM Capacity | 56 bytes | 56 bytes | 56 bytes |
| Calendar Format | Full BCD seconds through year | Full BCD seconds through year | Full BCD seconds through year |
| End-of-Month Adjustment | Automatic | Automatic | Automatic |
Diferenciadores clave
- Integrated calendar clock and persistent storage (frente a DS1307ZN+)
- Nominal 5 V integration (frente a DS1307Z+)
- Calendar handling reduces host correction logic (frente a DS1307ZN+)
- Compact eight-pin implementation (frente a DS1307Z+)
Notas de diseño
Place the DS1307ZN+T&R/C02 close to the host controller and place its supply-decoupling capacitor at the device supply pins with a short, low-inductance connection. Route the I2C clock and data traces away from noisy power-conversion paths and maintain continuous ground references. The supplied data confirms the 8-SOIC footprint and I2C interface but does not provide recommended capacitor values or trace dimensions; obtain those values from the complete manufacturer datasheet rather than estimating them.
Do not treat the /C02 ordering suffix as interchangeable without checking the manufacturer ordering guide, packing configuration, and included components. The verified listings identify DS1307ZN+T&R/C02 and DS1307ZN+ as members of the same DS1307 family, but the supplied snippets do not expose the complete differences between suffixes. Maintain the exact approved MPN in the BOM, use the manufacturer pinout for PCB review, and confirm that any substitution preserves the required packing, components, and production traceability.
Design the backup-power path around the complete DS1307 datasheet because the verified excerpts identify the 4.5 V to 5.5 V operating range but do not specify the backup-cell chemistry, switchover thresholds, or leakage limits. Check whether the chosen supply topology permits uninterrupted RTC operation during a system power loss and account for the backup source's effect on total board leakage. Do not infer the capacitor, crystal, or backup-cell selection from the distributor summaries alone.
I2C signal integrity depends on the complete pull-up network and bus topology, which are not included in the verified snippets. Select pull-up values from the full datasheet after considering bus voltage, capacitance, clock rate, and the number of connected devices. Keep pull-ups near the bus master when appropriate, avoid long stubs, and test rise times at the worst-case process, voltage, and temperature corners before release.
Información de cumplimiento
The provided cross-reference search references RoHS and REACH comparisons, but the snippets do not expose their actual status values. No compliance claim has therefore been assigned without a verified source statement.