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DS1689SN PDF预览

DS1689SN

更新时间: 2024-09-24 22:50:47
品牌 Logo 应用领域
达拉斯 - DALLAS 计时器或实时时钟微控制器和处理器外围集成电路光电二极管双倍数据速率
页数 文件大小 规格书
32页 321K
描述
3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control

DS1689SN 技术参数

生命周期:Transferred包装说明:SOIC-28
Reach Compliance Code:unknown风险等级:5.72
Is Samacsys:N其他特性:CAN ALSO OPERATE WITH 5V SUPPLY
最大时钟频率:0.032 MHz外部数据总线宽度:8
信息访问方法:PARALLEL, DIRECT ADDRESS/MUXED BUSJESD-30 代码:R-PDSO-G28
端子数量:28计时器数量:1
最高工作温度:85 °C最低工作温度:-40 °C
封装主体材料:PLASTIC/EPOXY封装形状:RECTANGULAR
封装形式:SMALL OUTLINE认证状态:Not Qualified
最大供电电压:3.63 V最小供电电压:2.97 V
标称供电电压:3.3 V表面贴装:YES
技术:CMOS温度等级:INDUSTRIAL
端子形式:GULL WING端子位置:DUAL
uPs/uCs/外围集成电路类型:TIMER, REAL TIME CLOCKBase Number Matches:1

DS1689SN 数据手册

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DS1689/DS1693  
3-Volt/5-Volt Serialized Real-Time Clock  
with NV RAM Control  
www.maxim-ic.com  
FEATURES  
PIN ASSIGNMENT  
Incorporates industry standard DS1287 PC clock  
plus enhanced features:  
VBAUX  
1
28  
27  
CEI  
VBAUX  
1
2
3
4
28  
27  
CEI  
NC  
NC  
2
3
4
CEO  
VCCI  
X1  
CEO  
VCCI  
26  
25  
26  
25  
X2  
C +3- or +5V operation  
VCCO  
RCLR  
AD0  
AD1  
AD2  
VCCO  
RCLR  
AD0  
AD1  
5
6
24  
23  
C 64-bit silicon serial number  
C 64-bit customer specific ROM or additional  
serial number available  
SQW  
5
6
24  
23  
SQW  
NC  
VBAT  
7
8
22  
21  
IRQ  
PSEL  
RD  
7
22  
21  
20  
19  
18  
17  
AD2  
AD3  
IRQ  
PSEL  
RD  
AD3  
AD4  
AD5  
AD6  
AD7  
PWR  
GND  
8
9
20  
19  
9
AD4  
AD5  
AD6  
C Power control circuitry supports system  
power-on from date/time alarm or key closure  
C Automatic battery backup and write  
protection to external SRAM  
10  
NC  
10  
11  
12  
GND  
WR  
11  
18  
WR  
12  
17  
ALE  
AD7  
PWR  
GND  
ALE  
CS  
13  
14  
16  
15  
13  
14  
16  
15  
CS  
KS  
KS  
C Crystal select bit allows RTC to operate with  
6 pF or 12.5 pF crystal  
DS1693 28-Pin Encapsulated Package  
(740-mil)  
DS1689S 28-Pin SOIC  
(330-mil)  
C 114 bytes user NV RAM  
C Auxiliary battery input  
PIN DESCRIPTION  
C RAM clear input  
X1  
X2  
RCLR  
- Crystal Input  
C Century register  
- Crystal Output  
C 32 kHz output for power management  
C 32-bit VCC powered elapsed time counter  
C 32-bit VBAT powered elapsed time counter  
C 16-bit power cycle counter  
C Compatible with existing BIOS for original  
DS1287 functions  
- RAM Clear Input  
AD0-AD7  
- Mux’ed Address/Data Bus  
PWR  
KS  
- Power-on Interrupt Output  
(Open drain)  
- Kickstart Input  
C Available as IC (DS1689) or standalone  
module with embedded battery and crystal  
(DS1693)  
CS  
ALE  
- RTC Chip Select Input  
- RTC Address Strobe  
WR  
- RTC Write Data Strobe  
C IC is available in industrial temperature  
version  
RD  
VCCO  
- RTC Read Data Strobe  
- RAM Power Supply Output  
C Timekeeping algorithm includes leap year  
compensation valid up to 2100  
IRQ  
- Interrupt Request Output  
(Open drain)  
SQW  
VCCI  
- Square Wave Output  
- +3- or +5V Main Supply  
- Ground  
ORDERING INFORMATION  
GND  
VBAT  
VBAUX  
PSEL  
PART #  
DS1689S  
DS1689SN  
DS1693  
DESCRIPTION  
- Battery + Supply  
RTC IC, 28-pin SOIC  
RTC IC, 28-pin SOIC IND  
RTC Module; 28-pin DIP  
- Auxiliary Battery Supply  
- +3- or +5V Power Select  
CEI  
- RAM Chip Enable In  
- RAM Chip Enable Out  
CEO  
1 of 32  
092800  

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