參數(shù)資料
型號: MAX6902ETA+T
廠商: Maxim Integrated Products
文件頁數(shù): 15/20頁
文件大?。?/td> 0K
描述: IC RTC SPI COMPAT 8-TDFN
標(biāo)準(zhǔn)包裝: 1
類型: 時鐘/日歷
特點: 警報器,閏年,NVSRAM,Y2K
存儲容量: 31B
時間格式: HH:MM:SS(12/24 小時)
數(shù)據(jù)格式: YY-MM-DD-dd
接口: SPI
電源電壓: 2 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 8-WDFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 8-TDFN-EP(3x3)
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: MAX6902ETA+TDKR
Detailed Description
The MAX6902 is a real-time clock/calendar with an SPI-
compatible interface and 31 x 8 bits of SRAM. It pro-
vides seconds, minutes, hours, day of the week, date of
the month, month, and year information, held in seven 8-
bit timekeeping registers (Functional Diagram). An on-
chip 32.768kHz oscillator circuit requires only a single
external crystal to operate. Table 1 specifies the para-
meters for the external crystal, and Figure 1 shows a
functional schematic of the oscillator circuit. The
MAX6902’s register addresses and definitions are
described in Figure 2 and in Table 2. Time and calendar
data are stored in the registers in binary-coded decimal
(BCD) format. A polled alarm function is included for
scheduled timing of user-defined times or intervals.
MAX6902
SPI-Compatible RTC in a TDFN
4
_______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1
SCLK
Serial Clock Input. SPI clock for DIN and
DOUT data transfers.
2
DOUT
SPI Data Output
3
DIN
SPI Data Input
4
GND
Ground
5
CS
Chip Select Input. Active low for valid data
transfers.
6VCC
Power-Supply Pin. Bypass VCC to GND
with a 0.1F capacitor.
7
X2
External 32.768kHz Crystal
8
X1
External 32.768kHz Crystal
—EP
Exposed Paddle. Internally connected to
GND. Connect to GND, but do not use as
the sole ground connection point or leave
unconnected.
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Frequency
f
32.768
kHz
Equivalent
Series
Resistance
(ESR)
RS
40
60
k
Ω
Parallel Load
Capacitance
CL
11.2
12.5
13.7
pF
Q Factor
Q
40,000
60,000
MAX6902
X1
X2
25pF
EXTERNAL
CRYSTAL
Figure 1. Crystal Oscillator Circuit Schematic
Table 1. Acceptable Quartz Crystal
Parameters
0.1
1.0
10.0
TIMEKEEPING CURRENT
vs. SUPPLY VOLTAGE
MAX6902
toc01
SUPPLY VOLTAGE (V)
SUPPLY
CURRENT
A)
2.0
3.5
4.0
2.5
3.0
4.5
5.0
5.5
Typical Operating Characteristic
(TA = +25°C, unless otherwise noted.)
相關(guān)PDF資料
PDF描述
MAX7375AXR604+T IC OSC SILICON SC70-3
MAX7394ATTLY+T IC OSC SILICON 922KHZ 6-TDFN
MAX7403CSA+ IC FILTER LOWPASS 8-SOIC
MAX7405EPA+ IC FILTER LOWPASS 8-DIP
MAX7412EPA+ IC FILTER LOWPASS 5TH 8DIP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX6902ETA-TG05 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
MAX6909EO30 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
MAX6909EO30+ 功能描述:實時時鐘 Integrated Circuits (ICs) 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
MAX6909EO30+T 功能描述:實時時鐘 Integrated Circuits (ICs) 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
MAX6909EO30-T 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