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參數(shù)資料
| 型號(hào)： | DS1646-120+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC RAM TIMEKEEP NV 120NS 32-EDIP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 12 |
| 類型： | 時(shí)鐘/日歷 |
| 特點(diǎn)： | 閏年，NVSRAM |
| 存儲(chǔ)容量： | 128KB |
| 時(shí)間格式： | HH:MM:SS（24 小時(shí)） |
| 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 |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 32-DIP 模塊（0.600"，15.24mm） |
| 供應(yīng)商設(shè)備封裝： | 32-EDIP |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1432 (CN2011-ZH PDF) |
DS1646/DS1646P
5 of 12
CLOCK ACCURACY (DIP MODULE)
The DS1646 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 calibration. For this reason, methods of field clock calibration are not available and not
necessary. Clock accuracy is also affected 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 refer to
Application Note 58.
CLOCK ACCURACY (POWERCAP MODULE)
The DS1646 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 affected 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 refer to Application Note 58.
1646 REGISTER MAP—BANK1 Table 2
ADDRESS
DATA
FUNCTION
B7
B6
B5
B4
B3
B2
B1
B0
1FFFF
—
Year
00–99
1FFFE
X
—
Month
01–12
1FFFD
X
-
—
Date
01–31
1FFFC
X
FT
X
—
Day
01–07
1FFFB
X
—
Hour
00–23
1FFFA
X
—
Minutes
00–59
1FFF9
OSC
—
Seconds
00–59
1FFF8
W
R
X
Control
A
OSC
= Stop Bit
R = Read Bit
FT = Frequency Test
W = Write Bit
X = Unused
Note: All indicated “X” bits are unused but must be set to “0” during write cycles to ensure proper clock
operation.
RETRIEVING DATA FROM RAM OR CLOCK
The DS1646 is in the read mode whenever WE (write enable) is high; CE (chip enable) is low. The
device architecture allows ripple-through access to any of the address locations in the NVSRAM. Valid
data will be available at the DQ pins within tAA 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 are not met, valid data will be
available at the latter of chip-enable access (tCEA) or at output enable access time (tOEA). The state of the
data input/output pins (DQ) is controlled by CE and OE . If the outputs are activated before tAA, the data
lines are driven to an intermediate state until tAA. If the address inputs are changed while CE and OE
remain valid, output data will remain valid for output data hold time (tOH) but will then go indeterminate
until the next address access.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1646-120+ | 功能描述:實(shí)時(shí)時(shí)鐘 NV Timekeeping 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 |
| DS1646-15 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:NVRAM (Battery Based) |
| DS1646H-120 | 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 |
| DS1646L-12 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:NVRAM (Battery Based) |
| DS1646L-120 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:NVRAM (Battery Based) |
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