參數(shù)資料
型號： DS1688
廠商： DALLAS SEMICONDUCTOR
元件分類： XO, clock
英文描述： 3 Volt Serialized Real Time Clock with NV RAM Control(帶非易失性RAM控制的3V不掉電實時時鐘)
中文描述： 1 TIMER(S), REAL TIME CLOCK, PDIP28
封裝： 0.600 INCH, DIP-28
文件頁數(shù)： 1/5頁
文件大?。?/td> 50K
代理商： DS1688
DS1688/DS1691
3 Volt/5 Volt Serialized Real Time Clock
with NV RAM Control
DS1688/DS1691
030598 1/5
FEATURES
Incorporates industry standard DS1287 PC clock plus
enhanced features:
+3 or +5 volt 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 NVRAM
Auxiliary battery input
RAM clear input
Century register
32 KHz output for power management
32–bit V
CC
powered elapsed time counter
32–bit V
BAT
powered elapsed time counter
16–bit power cycle counter
Compatible with existing BIOS for original DS1287
functions
Available as chip (DS1688) or stand–alone module
with embedded battery and crystal (DS1691)
Timekeeping algorithm includes leap year compensa-
tion valid up to 2100
ORDERING INFORMATION
PART #
DS1688
DS1688S
DS1691
DESCRIPTION
RTC Chip, 28–pin DIP
RTC Chip, 28–pin SOIC
RTC Module; 28–pin DIP
PIN ASSIGNMENT
V
BAUX
X1
X2
RCLR
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
PWR
GND
CEI
CEO
V
CCI
V
CCO
SQW
V
BAT
IRQ
PSEL
RD
GND
WR
ALE
CS
KS
V
BAUX
X1
X2
RCLR
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
PWR
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CEI
CEO
V
CCI
V
CCO
SQW
V
BAT
IRQ
PSEL
RD
GND
WR
ALE
CS
KS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
DS1688 28–PIN DIP
(600 MIL)
DS1688S 28–PIN SOIC
(330 MIL)
CEI
CEO
V
CCI
V
CCO
SQW
NC
IRQ
PSEL
RD
NC
WR
ALE
CS
KS
V
BAUX
NC
NC
RCLR
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
PWR
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
DS1691 28–PIN ENCAPSU-
LATED PACKAGE (740 MIL)
PIN DESCRIPTION
X1
X2
RCLR
AD0-AD7
PWR
KS
CS
ALE
WR
RD
V
CCO
– Crystal Input
– Crystal Output
– RAM Clear Input
– Mux’ed Address/Data Bus
– Power–on Interrupt Output
– Kickstart Input
– RTC Chip Select Input
– RTC Address Strobe
– RTC Write Data Strobe
– RTC Read Data Strobe
– RAM Power Supply Output
相關(guān)PDF資料
PDF描述
DS1691 5 Volt Serialized Real Time Clock with NV RAM Control(帶非易失性RAM控制的5V不掉電實時時鐘)
DS1689 3 Volt Serialized Real Time Clock with NV RAM Control(帶非易失性RAM控制的3V不掉電實時時鐘)
DS1693 5 Volt Serialized Real Time Clock with NV RAM Control(帶非易失性RAM控制的5V不掉電實時時鐘)
DS1705 5.0 Volt MicroMonitor(5.0 V微監(jiān)控器（手復(fù)+電源比較器+看門狗）)
DS1706 3.3 and 5.0 Volt MicroMonitor(3.3和5.0 V微監(jiān)控器（手復(fù)+電源比較器+看門狗）)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1688_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
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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
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(fēng)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(fēng)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
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*