DS17285 Real Time Clock: Pinout, Equivalent and Datasheet

The following figure is the diagram of DS17285 Pinout.

Pinout

The followings are DS17285 Symbol, Footprint, and 3D Model.

Symbol

Footprint

3D Model

The DS17285 Real Time Clock is designed to be successors to the industry-standard DS12885. The DS17285 (hereafter referred to as the DS17x85) provides a real-time clock/calendar, one time-of-day alarm, three maskable interrupts with a common interrupt output, a programmable square wave, and 114 bytes of battery-backed NV SRAM. The DS17x85 also incorporates a number of enhanced functions including a silicon serial number, power-on/off control circuitry, and 2k, 4k, or 8kbytes of battery-backed NV SRAM. The DS17x85 power-control circuitry allows the system to be powered on by an external stimulus such as a keyboard or by a time-and-date (wake-up) alarm. The PWR output pin is triggered by one or either of these events, and is used to turn on an external power supply. The PWR pin is under software control, so that when a task is complete, the system power can then be shut down.

For all devices, the date at the end of the month is automatically adjusted for months with fewer than 31 days, including correction for leap years. It also operates in either 24-hour or 12-hour format with an AM/PM indicator. A precision temperature-compensated circuit monitors the status of V_CC. If a primary power failure is detected, the device automatically switches to a backup supply. A lithium coin cell battery can be connected to the V_BAT input pin on the DS17285 to maintain time and date operation when primary power is absent. The DS17285 includes a V_BAUX input used to power auxiliary functions such as PWR control. The device is accessed through a multiplexed byte-wide interface.

This article will introduce DS17285 systematically from its features, pinout to its specifications, applications, also including DS17285 datasheet and so much more.

● RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Through 2099

● Optional +3.0V or +5.0V Operation

● SMI Recovery Stack

● 64-Bit Silicon Serial Number

● Power-Control Circuitry Supports System Power-On from Date/Time Alarm or Key Closure

● Crystal Select Bit Allows Operation with 6pF or 12.5pF Crystal

● 12-Hour or 24-Hour Clock with AM and PM in 12-Hour Mode

● 114 Bytes of General-Purpose, Battery-Backed NV SRAM

● Extended Battery-Backed NV SRAM: 2048 Bytes

● RAM Clear Function

● Interrupt Output with Six Independently Maskable Interrupt Flags

● Time-of-Day Alarm Once per Second to Once per Day

● End of Clock Update Cycle Flag

● Programmable Square-Wave Output

● Automatic Power-Fail Detect and Switch Circuitry

● Available in PDIP, SO, or TSOP Package

● Optional Industrial Temperature Range Available

● Underwriters Laboratory (UL) Recognized

Maxim Integrated DS17285S-3+ technical specifications, attributes, parameters and parts with similar specifications to Maxim Integrated DS17285S-3+.

The following is the Functional Diagram of DS17285.

Functional Diagram

The following diagram shows the DS17285 Typical Operating Circuit.

Typical Operating Circuit

● Embedded Systems

● Utility Meters

● Security Systems

● Network Hubs, Bridges, and Routers

The following diagrams show the DS17285 Package.

Top View

Side View

End View

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