參數(shù)資料
型號(hào)： DS1743WP-120
英文描述： Y2KC Nonvolatile Timekeeping RAM
中文描述： Y2KC非易失內(nèi)存時(shí)鐘
文件頁(yè)數(shù)： 4/17頁(yè)
文件大?。?/td> 247K
代理商： DS1743WP-120
DS1743/DS1743P
4 of 17
CLOCK ACCURACY (DIP MODULE)
The DS1743 is guaranteed to keep time accuracy to within
±
1 minute per month at 25
°
C. The RTC is
calibrated at the factory by Dallas Semiconductor using nonvolatile tuning elements, and does not require
additional For this reason, methods of field clock calibration are not available and not necessary. Clock
accuracy is also effected by the electrical environment and caution should be taken to place the RTC in the
lowest level EMI section of the PCB layout. For additional information please see application note 58.
CLOCK ACCURACY (POWERCAP MODULE)
The DS1743 and DS9034PCX are each individually tested for accuracy. Once mounted together, the
module will typically keep time accuracy to within
±
1.53 minutes per month (35 ppm) at 25°C. Clock
accuracy is also effected by the electrical environment and caution should be taken to place the RTC in the
lowest level EMI section of the PCB layout. For additional information please see application note 58.
DS1743 REGISTER MAP
Table 2
DATA
B
4
ADDRESS
B
7
B
6
B
5
B
3
B
2
YEAR
MONTH
DATE
B
1
B
0
FUNCTION/RANGE
1FFF
1FFE
1FFD
1FFC
1FFB
1FFA
1FF9
1FF8
10 Year
YEAR
MONTH
DATE
DAY
HOUR
MINUTES
SECONDS
CONTROL
00-99
01-12
01-31
01-07
00-23
00-59
00-59
00-39
X
X
BF
X
X
X
X
FT
X
X
10 Mo
10 Date
X
X
X
DAY
10 HOUR
HOUR
MINUTES
SECONDS
CENTURY
10 MINUTES
10 SECONDS
10 CENTURY
OSC
W
R
OSC
= STOP BIT
W = WRITE BIT
R = READ BIT
X = SEE NOTE BELOW
FT = FREQUENCY TEST
BF = BATTERY FLAG
NOTE:
All indicated “X” bits are not dedicated to any particular function and can be used as normal RAM bits.
RETRIEVING DATA FROM RAM OR CLOCK
The DS1743 is in the read mode whenever
OE
(output enable) is low,
WE
(write enable) is high, and
CE
(chip enable) is low. The device architecture allows ripple-through access to any of the address locations
in the NV SRAM. Valid data will be available at the DQ pins within t
AA
after the last address input is
stable, providing that the
CE
, and
OE
access times and states are satisfied. If
CE
, or
OE
access times and
states are not met, valid data will be available at the latter of chip enable access (t
CEA
) or at output enable
access time (t
CEA
). The state of the data input/output pins (DQ) is controlled by
CE
, and
OE
. If the
outputs are activated before t
AA
, the data lines are driven to an intermediate state until t
AA
. If the address
inputs are changed while
CE
, and
OE
remain valid, output data will remain valid for output data hold time
(t
OH
) but will then go indeterminate until the next address access.
相關(guān)PDF資料
PDF描述
DS1743WP-150 Y2KC Nonvolatile Timekeeping RAM
DS1743P-100 OSC 3.3V SMT 7X5 CMOS
DS1743P-70 Y2KC Nonvolatile Timekeeping RAM
DS1743 Y2KC Nonvolatile Timekeeping RAM
DS1743P Y2KC Nonvolatile Timekeeping RAM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1743WP-120+ 功能描述:實(shí)時(shí)時(shí)鐘 Timekeeping NV RAM 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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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
DS1743WP-120IND 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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
DS1743WP-120IND+ 功能描述:實(shí)時(shí)時(shí)鐘 Timekeeping NV RAM 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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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
DS1743WP-150 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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
DS1743WP-150+ 功能描述:實(shí)時(shí)時(shí)鐘 Timekeeping NV RAM 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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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
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