- 您现在的位置：买卖IC网 > PDF目录9395 > DS1685QN-5+ (Maxim Integrated Products)IC RTC 5V 64-BIT Y2KC IND 28PLCC PDF资料下载
参数资料
| 型号： | DS1685QN-5+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 32/34页 |
| 文件大小： | 0K |
| 描述： | IC RTC 5V 64-BIT Y2KC IND 28PLCC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 37 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，NVSRAM，方波输出，Y2K |
| 存储容量： | 242B |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | 并联 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 电压 - 电源，电池： | 2.5 V ~ 3.7 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-LCC（J 形引线） |
| 供应商设备封装： | 28-PLCC（11.51x11.51） |
| 包装： | 管件 |
| 产品目录页面： | 1434 (CN2011-ZH PDF) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页当前第32页第33页第34页
DS1685/DS1687 3V/5V Real-Time Clocks
7 of 34
Table 1. Crystal Specifications*
8B
PARAMETER
9B
SYMBOL
MIN
TYP
MAX
UNITS
Nominal Frequency
fO
32.768
kHz
Series Resistance
ESR
50
k
Load Capacitance
CL
6, 12.5
pF
*The crystal, traces, and crystal input pins should be isolated from RF generating signals. Refer to Application Note 58: Crystal Considerations
for Dallas Real-Time Clocks for additional specifications.
CLOCK ACCURACY
The accuracy of the clock is dependent on the accuracy of the crystal and the accuracy of the match between the
capacitive load of the oscillator circuit and the capacitive load for which the crystal was trimmed. Additional error is
added by crystal frequency drift caused by temperature shifts. External circuit noise coupled into the oscillator
circuit can result in the clock running fast. Figure 3 shows a typical PC board layout for isolation of the crystal and
oscillator from noise. Refer to Application Note 58: Crystal Considerations with Dallas Real-Time Clocks for
detailed information.
The DS1685 can also be driven by an external 32.768 kHz oscillator. In this configuration, the X1 pin is connected
to the external oscillator signal and the X2 pin is floated. Refer to Application Note 58: Crystal Considerations with
Dallas Real-Time Clocks for detailed information about crystal selection and crystal layout.
Figure 2. Oscillator Circuit Showing Internal Bias Network
Figure 3. Typical Crystal Layout
Countdown
Chain
RTC
X1
X2
Crystal
CL1
CL2
RTC
Registers
Local ground plane (Layer 2)
crystal
X1
X2
GND
NOTE: AVOID ROUTING SIGNAL LINES IN
THE CROSSHATCHED AREA (UPPER
LEFT QUADRANT) OF THE PACKAGE
UNLESS THERE IS A GROUND PLANE
BETWEEN THE SIGNAL LINE AND THE
DEVICE PACKAGE.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1844E-010+ | IC POT DIG QUAD 10K 20-TSSOP |
| VI-J4T-MZ | CONVERTER MOD DC/DC 6.5V 25W |
| VI-B23-MY-F4 | CONVERTER MOD DC/DC 24V 50W |
| DS1244W-120+ | IC NVSRAM 256KBIT 120NS 28DIP |
| DS1806E-100+ | IC POT DIG SEXTET 100K 20-TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1685QN-5/T&R | 制造商:Maxim Integrated Products 功能描述:IC RTC 5V 64-BIT Y2KC IND 28PLCC |
| DS1685QN-5/T&R | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1685QN-5/TR | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3V/5V Real-Time Clocks |
| DS1685QN-5_12 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:3V/5V Real-Time Clocks |
| DS1685QN-5+ | 功能描述:实时时钟 3V/5V RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。