Product Summary

The DS1687-3IND is a real-time clock (RTC) designed as successors to the industry-standard DS1285,DS1385, DS1485, and DS1585 PC RTCs. These devices provide the industry-standard DS1687-3IND clock function witheither +3.0V or +5.0V operation. The DS1687-3IND also incorporates a number of enhanced features including a siliconserial number, power-on/off control circuitry, 242 bytes of user NV SRAM, and 32.768kHz output for sustainingpower management activities.

Parametrics

DS1687-3IND absolute maximum ratings: (1)Voltage Range on Any Pin Relative to Ground: 0.3V to +6V; (2)Operating Temperature Range, Commercial: 0℃ to +70℃ Operating Temperature Range, Industrial: -40℃ to +85℃ ; (3)Storage Temperature Range: EDIP -40℃ to +85℃ PDIP, SO, TSSOP -55℃ to +125℃; (4)Lead Temperature (soldering, 10s): +260℃(Note: EDIP is hand or wave-soldered only.); (5)Soldering Temperature (reflow): +260℃.

Features

DS1687-3IND features: (1)+3V or +5V Operation; (2)64-Bit Silicon Serial Number; (3)Power-Control Circuitry Supports System; (4)Power-On from Date/Time Alarm or Key Closure; (5)32kHz Output for Power Management; (6)Crystal-Select Bit Allows RTC to Operate with 6pF or 12.5pF Crystal; (7)SMI Recovery Stack; (8)242 Bytes Battery-Backed NV RAM; (9)Auxiliary Battery Input.

Diagrams

DS1687-3IND block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
DS1687-3IND
DS1687-3IND

Maxim Integrated Products

Real Time Clock 3V/5V RTC

Data Sheet

0-346: $5.83
DS1687-3IND+
DS1687-3IND+

Maxim Integrated Products

Real Time Clock 3V/5V RTC

Data Sheet

0-1: $11.99
1-25: $8.05
25-50: $5.83
50-100: $5.76