DS1338Z-3+

Real Time Clock Overview

The DS1338Z-3+ is a low-power serial real-time clock (RTC) and 56-byte NV SRAM manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 2.7V to 5.5V, with a typical active current of 110µA at 3.3V and standby current of 80µA. The device features an I²C interface, supports -40°C to +85°C industrial temperatures, and includes automatic power-fail detection for seamless switching to a backup supply.

Real Time Clock Feature Summary

• Full BCD clock/calendar with leap-year compensation valid up to 2100
• 56-byte battery-backed general-purpose RAM with unlimited writes
• Built-in power-fail detect and switch circuitry
• Programmable square-wave output signal

Real Time Clock Applications

• Handhelds (GPS, POS Terminal)
• Consumer Electronics (Set-Top Box, Digital Recording, Network Appliance)
• Office Equipment (Fax/Printer, Copier)
• Medical (Glucometer, Medicine Dispenser)
• Telecommunications (Router, Switcher, Server)

Real Time Clock Procurement Notes

Verify the package type matches the required footprint, as the Z suffix indicates an 8-SOIC package. Confirm that the ordering suffix corresponds to the specific voltage variant needed for the application design. Ensure compliance with RoHS standards if lead-free components are required for the manufacturing process.

Real Time Clock Selection Notes

Select the DS1338Z-3+ when a 2.7V minimum supply voltage is acceptable. Compare against the DS1338Z-18+ for lower voltage applications or the DS1338Z-33+ for nominal 3.3V systems. Consider the DS1338C series if an integrated crystal is preferred to save board space.

Real Time Clock Part Context

The DS1338Z-3+ belongs to the DS1338 family of serial RTCs. It shares core functionality with variants like the DS1338Z-18+ and DS1338Z-33+, differing primarily in recommended operating voltage ranges. The 'Z' designation specifies the 8-pin SOIC package format.

Real Time Clock Replacement Considerations

Direct substitutes include other DS1338 variants such as DS1338Z-18+ or DS1338Z-33+ if voltage requirements differ. For packages with integrated crystals, consider the DS1338C series.