DS17485S-5

$4.98

Description：IC RTC CLK/CALENDAR PAR 24SOIC
Series：-

SKU:1c54e38a4a12 Category: Real Time Clocks Brand: Analog Devices Inc./Maxim Integrated

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Product introduction

DS17485S-5 is listed in the Real Time Clock range at ChipApex. The manufacturer field lists Analog Devices Inc./Maxim Integrated. Its product description is IC RTC CLK/CALENDAR PAR 24SOIC. Review the specifications below when checking this part for your BOM.

Real Time Clock specifications for DS17485S-5

Description：IC RTC CLK/CALENDAR PAR 24SOIC
Series：-
Package：Tube
Mfr：Analog Devices Inc./Maxim Integrated
Type：Clock/Calendar
Features：Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output
Memory Size：4KB
Time Format：HH:MM:SS (12/24 hr)
Date Format：YY-MM-DD-dd
Interface：Parallel
Voltage - Supply：4.5V ~ 5.5V
Voltage - Supply, Battery：2.5V ~ 3.7V
Current - Timekeeping (Max)：3mA @ 4.5V ~ 5.5V
Operating Temperature：0°C ~ 70°C
Mounting Type：Surface Mount
Grade：-
Qualification：-
Package / Case：24-SOIC (0.295", 7.50mm Width)
Supplier Device Package：24-SOIC

Real Time Clock datasheet and documents for DS17485S-5

DS17485S-5

Real Time Clock Overview

The DS17485S-5 is a real-time clock (RTC) IC from the DS17x85 family, designed as a successor to the DS12885. It features a multiplexed byte-wide interface and provides a real-time clock/calendar with leap year compensation through 2099. The device includes one time-of-day alarm, three maskable interrupts, and a programmable square-wave output. It incorporates 4096 bytes of battery-backed NV SRAM alongside 114 bytes of general-purpose RAM. Operating at +5.0V nominal with a range of 4.5V to 5.5V, it utilizes an external 32.768kHz crystal and switches automatically to backup power upon primary supply failure.

Real Time Clock Feature Summary

4096 Bytes Battery-Backed NV SRAM
Multiplexed Byte-Wide Interface
Leap Year Compensation Through 2099
Automatic Power-Fail Detect and Switch

Real Time Clock Applications

Embedded Systems
Utility Meters
Security Systems
Network Hubs, Bridges, and Routers

Real Time Clock Procurement Notes

Verify component status as the DS17485S-5 is listed as obsolete in distributor records. Confirm availability of the direct replacement DS17485S-5+ for current production needs. Ensure ordering suffixes match required package types and voltage specifications. Check RoHS compliance status for specific manufacturing batches.

Real Time Clock Selection Notes

Select this part for systems requiring high-capacity nonvolatile memory integrated with RTC functions. The +5V operation suits legacy PC-clock designs. Verify crystal load capacitance requirements (6pF or 12.5pF) against the selected oscillator component. Ensure VBAT and VBAUX supplies are correctly configured for auxiliary functions like kickstart.

Real Time Clock Part Context

This component belongs to the DS17x85 series, which also includes the DS17285 (2KB RAM) and DS17885 (8KB RAM). Unlike the DS17x87 variants, the DS17485 does not integrate a quartz crystal or lithium battery, requiring external connections via X1/X2 and VBAT pins. It shares pin compatibility with the industry-standard DS12887.