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Select all	Attribute	Value
	Brand	Maxim Integrated
	Functions	NV SRAM, Real Time Clock
	User RAM	242B
	Bus Type	Multiplexed
	Mounting Type	Surface Mount
	Package Type	EDIP
	Pin Count	24
	Dimensions	1.34 x 0.72 x 0.37mm
	Length	1.34mm
	Width	0.72mm
	Height	0.37mm
	Maximum Operating Supply Voltage	5.5 V
	Minimum Operating Temperature	0 °C
	Minimum Operating Supply Voltage	4.5 V
	Maximum Operating Temperature	+70 °C

	Select all
	Brand Maxim Integrated
	Functions NV SRAM, Real Time Clock
	User RAM 242B
	Bus Type Multiplexed
	Mounting Type Surface Mount
	Package Type EDIP
	Pin Count 24
	Dimensions 1.34 x 0.72 x 0.37mm
	Length 1.34mm
	Width 0.72mm
	Height 0.37mm
	Maximum Operating Supply Voltage 5.5 V
	Minimum Operating Temperature 0 °C
	Minimum Operating Supply Voltage 4.5 V
	Maximum Operating Temperature +70 °C

Datasheet DS1687-3+

COO (Country of Origin):: PH

Y2K Compliant
+3V or +5V Operation
64-Bit Silicon Serial Number
Power-Control Circuitry Supports System Power-On from Date/Time Alarm or Key Closure
32kHz Output for Power Management
Crystal-Select Bit Allows RTC to Operate with 6pF or 12.5pF Crystal
SMI Recovery Stack
242 Bytes Battery-Backed NV RAM
Auxiliary Battery Input
RAM Clear Input
Century Register
Date Alarm Register
Compatible with Existing BIOS for Original DS1287 Functions
Available as Chip (DS1685) or Stand-Alone Encapsulated DIP (EDIP) with Embedded Battery and Crystal (DS1687)
Timekeeping Algorithm Includes Leap-Year Compensation Valid Through 2099
Applications
Embedded Systems
Network Hubs, Switches, Routers
Security Systems
Utility Meters

Maxim Integrated DS1687-3+, Real Time Clock, 242B RAM Multiplexed, 24-Pin EDIP

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