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參數(shù)資料
| 型號： | DS1688S |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Timer or RTC |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數(shù)： | 1/4頁 |
| 文件大?。?/td> | 63K |
| 代理商： | DS1688S |
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092600
FEATURES
Incorporates industry standard DS1287 PC clock
plus enhanced features:
+3 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
6 pF or 12.5 pF crystal
114 bytes user NV RAM
Auxiliary battery input
RAM clear input
Century register
32 kHz 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 #
DESCRIPTION
DS1688S
RTC IC, 28–pin SOIC
DS1691
RTC Module; 28–pin DIP
PIN ASSIGNMENT
PIN DESCRIPTION
X1
- Crystal Input
X2
- Crystal Output
RCLR
- RAM Clear Input
AD0-AD7
- Mux’ed Address/Data Bus
PWR
- Power-on Interrupt Output
KS
- Kickstart Input
CS
- RTC Chip Select Input
ALE
- RTC Address Strobe
WR
- RTC Write Data Strobe
RD
- RTC Read Data Strobe
VCCO
- RAM Power Supply Output
DS1688/DS1691
3 Volt/5 Volt Serialized Real Time Clock
with NV RAM Control
www.dalsemi.com
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS1688S+ | 功能描述:實時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1689 | 功能描述:實時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1689_05 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:3V/5V Serialized Real-Time Clocks with NV RAM Control |
| DS1689S | 功能描述:實時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1689S/R | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:3V/5V Serialized Real-Time Clocks with NV RAM Control |
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