DS1688S Maxim Integrated Products, DS1688S Datasheet

DS1688S

Manufacturer Part Number

DS1688S

Description

IC RTC W/NV RAM CTRL 28-SOIC

Manufacturer

Maxim Integrated Products

Type

Clock/Calendar/Serializedr

Datasheet

1.DS1688S.pdf (3 pages)

Specifications of DS1688S

Memory Size

114B

Time Format

HH:MM:SS (12/24 hr)

Date Format

YY-MM-DD

Interface

Parallel

Voltage - Supply

2.7 V ~ 3.3 V, 4.5 V ~ 5.5 V

Operating Temperature

0°C ~ 70°C

Mounting Type

Surface Mount

Package / Case

28-SOIC (7.5mm Width)

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

DS1688S

Manufacturer:

DALLAS

Quantity:

Company:

Meier Automation Equipment Co., Limited

Part Number:

DS1688S

Manufacturer:

Quantity:

20 000

Current page: 1 of 3
Download datasheet (94Kb)

www.maxim-ic.com

GENERAL DESCRIPTION

The DS1688/DS1691 are real-time clocks

(RTCs) designed as successors to the industry

standard

DS1585 PC real-time clocks. These devices

provide the industry standard DS1285 clock

function with the new feature of either +3.0V or

+5.0V operation and automatic backup and write

protection to an external SRAM. The DS1688

also incorporates a number of enhanced features

including a silicon serial number, power-on/off

control circuitry, 114 bytes of user NV SRAM,

power-on elapsed timer, and power-cycle

counter.

PIN CONFIGURATIONS

ORDERING INFORMATION

+ Denotes a lead(Pb)-free/RoHS-compliant device.

+ A “+” anywhere on the top mark denotes a lead(Pb)-free/RoHS-compliant device.

DS1688S

DS1688S+

DS1691

TOP VIEW

PART

DS1285,

DS1385,

TEMP RANGE

0C to +70C

DS1485,

and

VOLTAGE (V)

3V/5V Serialized Real-Time Clocks

1 of 3

3 to 5

FEATURES

Incorporates Industry Standard DS1287 PC

Clock Plus Enhanced Features:

 +3V or +5V Operation

 64-Bit Silicon Serial Number

 64-Bit Customer Specific ROM or

 Power Control Circuitry Supports System

 Automatic Battery Backup and Write

 Crystal Select Bit Allows RTC to Operate

 114 Bytes User NV RAM

 Auxiliary Battery Input

 RAM Clear Input

 Century Register

 32kHz Output for Power Management

 32-Bit V

 16-Bit Power-Cycle Counter

 Compatible with Existing BIOS for

 Available as IC (DS1688) or Stand-Alone

 Timekeeping Algorithm Includes Leap

Additional Serial Number Available

Power-On from Date/Time Alarm or Key

Closure

Protection to External SRAM

with 6Pf or 12.5Pf Crystal

Counter

Original DS1287 Functions

Module with Embedded Battery and

Crystal (DS1691)

Year Compensation Valid Up to 2100

PIN-PACKAGE

28 SO (0.330)

28 EDIP (0.740)

BAT

with NV RAM Control

Powered Elapsed Time

DS1688/DS1691

REV: 112205

TOP MARK*

DS1688S

DS1691

Related parts for DS1688S

DS1688S Summary of contents

Page 1

... Module with Embedded Battery and Crystal (DS1691)  Timekeeping Algorithm Includes Leap Year Compensation Valid Up to 2100 VOLTAGE ( DS1688/DS1691 with NV RAM Control Powered Elapsed Time CC Powered Elapsed Time BAT PIN-PACKAGE TOP MARK (0.330) DS1688S 28 SO (0.330) DS1688S DS1691 28 EDIP (0.740) REV: 112205 ...

Page 2

DETAILED DESCRIPTION Each DS1688/DS1691 is individually manufactured with a unique 64-bit serial number as well as an additional 64-bit customer-specific ROM or serial number. The serial number is programmed and tested at Dallas to ensure that no two devices are ...

Page 3

... Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time The Maxim logo is a registered trademark of Maxim Integrated Products, Inc. The Dallas logo is a registered trademark of Dallas Semiconductor Corporation. FUNCTION Auxiliary Battery Supply ...

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