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參數(shù)資料
| 型號： | DS1691 |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Timer or RTC |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDIP28 |
| 封裝： | 0.740 INCH, ENCAPSULATED, DIP-28 |
| 文件頁數(shù)： | 1/6頁 |
| 文件大?。?/td> | 394K |
| 代理商： | DS1691 |
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REV: 112205
GENERAL DESCRIPTION
The DS1688/DS1691 are real-time clocks
(RTCs) designed as successors to the industry
standard DS1285, DS1385, DS1485, and
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
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
Additional Serial Number Available
Power Control Circuitry Supports System
Power-On from Date/Time Alarm or Key
Closure
Automatic Battery Backup and Write
Protection to External SRAM
Crystal Select Bit Allows RTC to Operate
with 6Pf or 12.5Pf Crystal
114 Bytes User NV RAM
Auxiliary Battery Input
RAM Clear Input
Century Register
32kHz Output for Power Management
32-Bit VCC Powered Elapsed Time
Counter
32-Bit VBAT Powered Elapsed Time
Counter
16-Bit Power-Cycle Counter
Compatible with Existing BIOS for
Original DS1287 Functions
Available as IC (DS1688) or Stand-Alone
Module with Embedded Battery and
Crystal (DS1691)
Timekeeping Algorithm Includes Leap
Year Compensation Valid Up to 2100
ORDERING INFORMATION
PART
TEMP RANGE
VOLTAGE (V)
PIN-PACKAGE
TOP MARK*
DS1688S
0
°C to +70°C
3 to 5
28 SO (0.330
″)
DS1688S
DS1688S+
0
°C to +70°C
3 to 5
28 SO (0.330
″)
DS1688S
DS1691
0
°C to +70°C
3 to 5
28 EDIP (0.740
″)
DS1691
+ Denotes a lead-free/RoHS-compliant device.
+ A “+” anywhere on the top mark denotes a lead-free/RoHS-compliant device.
DS1688/DS1691
3V/5V Serialized Real-Time Clocks
with NV RAM Control
www.maxim-ic.com
TOP VIEW
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PDF描述 |
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| DS1724S | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), RECTANGULAR, SURFACE MOUNT |
| DS1724S | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), RECTANGULAR, SURFACE MOUNT |
| DS1973-F3 | 512 X 8 1-WIRE SERIAL EEPROM, MEDB2 |
| DS1973-F5 | 512 X 8 1-WIRE SERIAL EEPROM, MRDB2 |
| DS1995L-F5 | 16K X 1 NON-VOLATILE SRAM, MRDB2 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1691 WAF | 制造商:Texas Instruments 功能描述: |
| DS1691/1692 WAF | 制造商:Texas Instruments 功能描述: |
| DS1691A | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:(RS-422/RS-423) Line Drivers with TRI-STATE Outputs |
| DS1691AJ/883 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:(RS-422/RS-423) Line Drivers with TRI-STATE Outputs |
| DS1691AJ/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Line Driver |
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