DS1307Z+T&R/C01 - 56B I2C RTC | Analog Devices
N.º de pieza: DS1307Z+T&R/C01 ✓ ActivoDS1307Z+T&R/C01 Descripción general
A real-time clock is an integrated circuit that maintains calendar time independently of the system processor. It belongs to the RTC and timekeeping IC hierarchy, where a clock/calendar supplies time and date information to embedded processing systems. A serial RTC combines this timekeeping function with a bidirectional bus such as I²C, allowing a microcontroller to read and write the clock registers and use the integrated SRAM for small quantities of retained data.
The DS1307 combines a full BCD clock/calendar with 56 bytes of NV SRAM in one 8-SOIC device. Its I²C interface uses serial address and data transfer, while the available clock fields cover seconds through year. The manufacturer states that month-end dates are adjusted automatically, reducing the software required for common calendar corrections. The specified 4.5 V to 5.5 V operating supply also places the device in conventional 5 V embedded-system environments.
The DS1307 is presented as a 64 × 8 serial I²C RTC in distributor documentation, while the underlying clock/calendar and 56-byte NV SRAM organization provides separate timekeeping and data-retention functions in the same package. Its 8-SOIC case, identified as 0.154 inch wide and 3.90 mm in body width, supports compact through-hole-style PCB assembly and conventional surface-mount reflow handling. The /C01 ordering suffix is associated with the supplied tape-and-reel product configuration.
Typical uses include embedded data loggers, industrial controllers, consumer electronics, access-control equipment, and small systems that require persistent timestamps or a simple battery-backed calendar. It can also serve as a host-side real-time clock in a microcontroller design where the processor sleeps between tasks and must recover accurate elapsed and calendar information. The integrated SRAM offers limited data retention without adding a separate memory IC.
Designers should verify the system bus pull-up arrangement, backup-battery behavior, and supply decoupling against the manufacturer datasheet before production release. The I²C lines and backup source must be arranged so normal supply transitions do not corrupt the clock/calendar or SRAM. Firmware should also verify the device address and the relationship between local time, UTC, daylight-saving rules, and the programmed calendar format.
This product record combines the manufacturer product description, the DS1307 manufacturer datasheet link, and distributor evidence for the 56-byte NV SRAM, 4.5 V to 5.5 V supply, I²C interface, 8-SOIC package, date format, and current ordering configuration. It also distinguishes verified drop-in alternatives from superficially similar RTC devices that require different interfaces, packages, or pin assignments.
Alternativas directas para DS1307Z+T&R/C01 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
No hay alternativas directas disponibles para este producto.
Solicitar alternativasDS1307Z+T&R/C01 Especificaciones
| Device Type | Serial real-time clock and calendar with NV SRAM |
| Clock/Calendar Encoding | Full binary-coded decimal (BCD) |
| NV SRAM Capacity | 56 bytes |
| Memory Organization | 64 x 8 bits |
| Serial Interface | I²C, 2-wire serial |
| Bus Direction | Bidirectional |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Calendar Fields | Seconds, minutes, hours, day, date, month, and year |
| Date Format | YY-MM-DD-dd |
| Time Format | HH:MM:SS, 12/24-hour |
| Month-End Adjustment | Automatic for months with fewer than 31 days |
| Square-Wave Output | Programmable |
| Encapsulado | 8-SOIC, 0.154 inch width, 3.90 mm body width |
| Tipo de montaje | Surface mount |
| Shipping Configuration | Tape and reel |
| Manufacturer Product Description | Low-power serial real-time clock and calendar with 56 bytes of NV SRAM |
| Estado RoHS | unknown |
| REACH Status | unknown |
Guía de configuración de pines de DS1307Z+T&R/C01 8-soic, 0.154 inch width, 3.90 mm body width
Configuración de pines para DS1307Z+T&R/C01 (encapsulado 8-soic, 0.154 inch width, 3.90 mm body 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 DS1307Z+T&R/C01.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
DS1307Z+T&R/C01 es adecuado para 6 aplicacións: Embedded Data Loggers, Industrial Control Systems, Access Control and Security Equipment, Consumer Electronics with Persistent Time, Remote Sensors and IoT Gateways, Battery-Backed Instrument Panels.
Embedded Data Loggers
The DS1307Z+T&R/C01 fits embedded data loggers that must stamp records with calendar time across a 4.5 V to 5.5 V supply environment. Its I²C interface allows a host microcontroller to read seconds, minutes, hours, day, date, month, and year from the BCD clock/calendar, while the 56 bytes of NV SRAM can retain a small amount of operating state. Automatic month-end adjustment also reduces routine date-maintenance code. Engineers should still plan battery backup, bus pull-ups, and firmware handling for UTC versus local time.
Recomendado
Industrial Control Systems
The DS1307Z+T&R/C01 is useful in industrial controllers that need a separate calendar source while the main processor handles acquisition and control functions. Its low-power serial real-time clock provides a complete date-and-time record through the 8-SOIC device, and its bidirectional I²C bus avoids a parallel address and data interface. The 56-byte NV SRAM can preserve a small status record during a brief power interruption. Designers should validate startup behavior, backup-battery endurance, and reset conditions for their specific controller enclosure.
Recomendado
Access Control and Security Equipment
The DS1307Z+T&R/C01 supports access-control and security equipment that records door events, credential changes, or maintenance activity against calendar time. Its I²C interface lets the controller retrieve the full BCD clock and calendar efficiently, while the 56 bytes of NV SRAM provide limited local retention for configuration fragments or counters. The 4.5 V to 5.5 V operating range suits conventional 5 V control boards. Production designs should define tamper handling, backup-source behavior, and time-synchronization procedures rather than treating the RTC as an absolute security authority.
Recomendado
Consumer Electronics with Persistent Time
The DS1307Z+T&R/C01 is appropriate for consumer products requiring a visible or logged date and time without relying continuously on a network time source. The 8-SOIC package integrates a BCD clock/calendar and 56-byte NV SRAM, allowing a compact controller to maintain time locally and preserve a small configuration area. Its I²C interface is convenient for systems already using two-wire peripherals. Designers should account for calendar initialization, daylight-saving policy, backup-battery replacement, and user interaction when setting the clock.
Recomendado
Remote Sensors and IoT Gateways
The DS1307Z+T&R/C01 can support remote sensors and IoT gateways that need local timestamps even when the upstream network is unavailable. A controller reads the BCD date and time over I²C and can associate sensor samples with a calendar record, while the 56 bytes of NV SRAM retains a limited amount of state through a short supply interruption. The device operates from 4.5 V to 5.5 V, making it suitable for regulated 5 V sensor nodes. Engineers should compare its time accuracy with the gateway’s synchronization needs and implement a policy for correcting drift.
Recomendado
Battery-Backed Instrument Panels
The DS1307Z+T&R/C01 is well suited to battery-backed instrument panels where displayed measurements or audit events need a local timestamp. The complete BCD calendar covers seconds through year, automatic month-end correction simplifies long-duration operation, and the 56-byte NV SRAM can hold a small amount of panel state. Its bidirectional I²C interface minimizes wiring compared with a parallel clock device and operates in 4.5 V to 5.5 V systems. Layout and firmware should preserve the backup path and avoid unintended I²C activity during low-power states.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para DS1307Z+T&R/C01 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto |
|---|---|
| Device Type | Serial RTC and calendar with NV SRAM |
| Package | 8-SOIC (0.154 inch, 3.90 mm width) |
| Brand | Analog Devices |
| Supply Voltage | 4.5 V to 5.5 V |
| NV SRAM Capacity | 56 bytes |
| Memory Organization | 64 x 8 bits |
| Serial Interface | Bidirectional I²C, 2-wire serial |
| Clock Encoding | Full BCD |
| Date Format | YY-MM-DD-dd |
| Time Format | HH:MM:SS, 12/24-hour |
| Shipping Configuration | Tape and reel with /C01 ordering code |
Diferenciadores clave
- Combines calendar timekeeping and local NV SRAM (frente a Functionally equivalent RTCs without integrated SRAM)
- Uses a bidirectional two-wire serial interface (frente a DS1302Z+T&R)
- Defined conventional 5 V operating range (frente a RTCs specified for lower-voltage or wider supply ranges)
- Compact 8-SOIC implementation (frente a Larger-package or functionally similar RTCs)
Notas de diseño
Place the DS1307Z+T&R/C01 close to the controller that owns the I²C bus, and route SDA and SCL away from switching nodes and high-current paths. Keep the backup-battery connection and associated grounding compact because long copper tracks can increase leakage into the retained clock and SRAM. Follow the manufacturer's 8-SOIC land pattern and verify the board assembler can source the /C01 tape-and-reel ordering code.
Design the supply path for 4.5 V to 5.5 V operation and validate transitions between the primary source and backup source against the DS1307 manufacturer datasheet. The RTC must not be allowed to leave its specified operating range, and the backup source must preserve calendar and SRAM contents without causing unintended I²C bus activity. If the system uses a supercapacitor or rechargeable cell, include the charging and reverse-current details from the manufacturer guidance.
Do not treat the DS1307 as a temperature-compensated precision RTC without evaluating oscillator drift. The component provides BCD calendar fields and automatic month-end adjustment, but daylight-saving transitions, leap-year rules, UTC versus local time, and initial clock programming remain firmware responsibilities. Before replacing another RTC, compare the complete pin table and register map; devices with similar RTC functions are not automatically pin-to-pin compatible.
Use the pull-up arrangement and bus timing specified in the manufacturer datasheet for the selected I²C controller and operating speed. The DS1307 communicates over a bidirectional two-wire bus, so address selection, repeated-start behavior, and read/write register addressing should be tested under both normal and bus-fault conditions. Avoid adding large capacitive loading without rechecking rise time and communication reliability.
Información de cumplimiento
The supplied excerpts reference RoHS and REACH in third-party comparison pages but do not provide an exact compliance declaration for DS1307Z+T&R/C01. The component is a clock IC rather than an automotive-qualified device, so AEC-Q100 is marked not applicable.
