參數(shù)資料
型號： DS1689S
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)： 1/32頁
文件大?。?/td> 381K
代理商： DS1689S
1 of 32
092800
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 (DS1689) or standalone
module with embedded battery and crystal
(DS1693)
IC is available in industrial temperature
version
Timekeeping algorithm includes leap year
compensation valid up to 2100
ORDERING INFORMATION
PART #
DESCRIPTION
DS1689S
RTC IC, 28-pin SOIC
DS1689SN
RTC IC, 28-pin SOK IND
DS1693
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
(Open drain)
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
IRQ
- Interrupt Request Output
(Open drain)
SQW
- Square Wave Output
VCCI
- +3- or +5V Main Supply
GND
- Ground
VBAT
- Battery + Supply
VBAUX
- Auxiliary Battery Supply
PSEL
- +3- or +5V Power Select
CEI
- RAM Chip Enable In
CEO
- RAM Chip Enable Out
DS1689/DS1693
3-Volt/5-Volt Serialized Real Time Clock
with NV RAM Control
www.dalsemi.com
VBAUX
DS1689S 28-Pin SOIC
(330-mil)
13
27
1
2
3
4
5
6
7
8
9
10
11
12
14
28
26
25
24
23
22
21
20
19
18
17
15
16
CEI
VCCO
SQW
VBAT
IRQ
PSEL
RD
GND
WR
ALE
KS
CS
CEO
VCCI
X2
AD0
AD2
AD3
AD4
AD5
AD6
AD7
GND
PWR
X1
RCLR
AD1
GND
DS1693 28-Pin Encapsulated Package
(740-mil)
13
27
NC
AD0
AD2
AD3
AD4
AD5
AD6
AD7
GND
PWR
CEI
VCCO
SQW
NC
IRQ
PSEL
RD
NC
WR
ALE
KS
CS
1
2
3
4
5
6
7
8
9
10
11
12
14
28
26
25
24
23
22
21
20
19
18
17
15
16
NC
RCLR
AD1
VBAUX
CEO
VCCI
相關(guān)PDF資料
PDF描述
DS1693 1 TIMER(S), REAL TIME CLOCK, PDMA28
DS1689 1 TIMER(S), REAL TIME CLOCK, PDIP28
DS1720S+T&R DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), RECTANGULAR, SURFACE MOUNT
DS1720S+ DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), RECTANGULAR, SURFACE MOUNT
DS1720S DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), RECTANGULAR, SURFACE MOUNT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
DS1689S/T 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/T&R 制造商:Rochester Electronics LLC 功能描述:
DS1689S/T&R 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
DS1689S/T&R/ 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
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