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參數(shù)資料
型號： DS1689
廠商： DALLAS SEMICONDUCTOR
元件分類： Timer or RTC
英文描述： 1 TIMER(S), REAL TIME CLOCK, PDIP28
封裝： 0.600 INCH, DIP-28
文件頁數(shù)： 1/32頁
文件大小： 376K
代理商： DS1689
1 of 32
080299
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 NV RAM
§ 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 (DS1689) or standalone
module with embedded battery and crystal
(DS1693)
§ Chips are available in industrial temperature
version
§ Timekeeping algorithm includes leap year
compensation valid up to 2100
ORDERING INFORMATION
PART #
DESCRIPTION
DS1689
RTC Chip, 28-pin DIP
DS1689S
RTC Chip, 28-pin SOIC
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
DS1689/DS1693
3-Volt/5-Volt Serialized Real Time Clock
with NV RAM Control
www.dalsemi.com
DS1689 28-Pin DIP
(600-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
VBAUX
X2
AD0
AD2
AD3
AD4
AD5
AD6
AD7
GND
PWR
X1
RCLR
AD1
CEI
VCCO
SQW
VBAT
IRQ
PSEL
RD
GND
WR
ALE
KS
CS
CEO
VCCI
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
GND
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
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
DS1721S+T&R DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 1Cel, RECTANGULAR, SURFACE MOUNT
DS1721U+ DIGITAL TEMP SENSOR-SERIAL, 12BIT(s), 1Cel, SQUARE, SURFACE MOUNT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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(fēng)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
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:
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