參數(shù)資料
型號: DS1685Q-5/T&R
廠商: Maxim Integrated Products
文件頁數(shù): 31/34頁
文件大?。?/td> 0K
描述: IC RTC 5V 64-BIT Y2KC 28-PLCC
產品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 500
類型: 時鐘/日歷
特點: 警報器,NVSRAM,方波輸出,Y2K
存儲容量: 242B
時間格式: HH:MM:SS(12/24 小時)
數(shù)據(jù)格式: YY-MM-DD-dd
接口: 并聯(lián)
電源電壓: 4.5 V ~ 5.5 V
電壓 - 電源,電池: 2.5 V ~ 3.7 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 28-LCC(J 形引線)
供應商設備封裝: 28-PLCC(11.51x11.51)
包裝: 帶卷 (TR)
DS1685/DS1687 3V/5V Real-Time Clocks
6 of 34
Figure 1. Block Diagram
OSCILLATOR CIRCUIT
The DS1685 uses an external 32.768kHz crystal. The oscillator circuit does not require any external resistors or
capacitors to operate. Table 1 specifies several crystal parameters for the external crystal, and Figure 2 shows a
functional schematic of the oscillator circuit. The oscillator is controlled by an enable bit in the control register.
Oscillator startup times are highly dependent upon crystal characteristics, PC board leakage, and layout. High ESR
and excessive capacitive loads are the major contributors to long startup times. A circuit using a crystal with the
recommended characteristics and proper layout usually starts within one second.
Power
Control
VBAT
GND
OSC
BUS
Interface
VCC
X1
X2
CS
WR
ALE
RD
AD0 - AD7
Divide
by 8
Divide by
64
Divide by
64
16:1 Mux
Square
Wave
Generator
Registers A, B,C,D
Clock/Calendar and
Alarm Registers
User Ram
114 Bytes
Clock/Calender
Update Logic
IRQ
SQW
RLCR
IRQ
Generator
Buffered Clock/
Calendar and Alarm
Registers
VBAUX
Extended RAM Addr/
Data Registers
Extended Control/
Status Registers
64-Bit Serial Number
Century Counter
Date Alarm
RTC Address -2
RTC Address -3
Extended
User RAM
128 Bytes
RAM
Clear
Logic
DS1687 only
Select
PWR
KS
DS1685/DS1687
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DS1685QN-3 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1685QN-3_12 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:3V/5V Real-Time Clocks
DS1685QN-3+ 功能描述:實時時鐘 3V/5V RTC 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
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DS1685QN-5/T&R 制造商:Maxim Integrated Products 功能描述:IC RTC 5V 64-BIT Y2KC IND 28PLCC