- 您現(xiàn)在的位置：買賣IC網 > PDF目錄381717 > DS1251Y (Maxim Integrated Products, Inc.) 4096K NV SRAM with Phantom Clock(帶幻影時鐘的4096K NV 靜態(tài)RAM) PDF資料下載
參數(shù)資料
| 型號： | DS1251Y |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 4096K NV SRAM with Phantom Clock(帶幻影時鐘的4096K NV 靜態(tài)RAM) |
| 中文描述： | 4096K非易失SRAM與幻影時鐘（帶幻影時鐘的4096K非易失靜態(tài)RAM）的 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 90K |
| 代理商： | DS1251Y |
DS1251Y
4096K NV SRAM with Phantom Clock
DS1251Y
022798 1/12
FEATURES
Real time clock keeps track of hundredths of seconds,
minutes, hours, days, date of the month, months, and
years
512K x 8 NV SRAM directly replaces volatile static
RAM or EEPROM
Embedded lithium energy cell maintains calendar op-
eration and retains RAM data
Watch function is transparent to RAM operation
Month and year determine the number of days in each
month; valid up to 2100
Lithium energy source is electrically disconnected to
retain freshness until power is applied for the first time
Standard 32–pin JEDEC pinout
Full 10% operating range
Operating temperature range 0
°
C to 70
°
C
Accuracy is better than
±
1 minute/month @ 25
°
C
Over 10 years of data retention in the absence of
power
Available in 120 ns and 150 ns access time
ORDERING INFORMATION
DS1251Y–120
DS1251Y–150
120 ns access
150 ns access
PIN ASSIGNMENT
32–PIN ENCAPSULATED PACKAGE
740 MIL FLUSH
V
CC
A15
A17
WE
A13
A8
A9
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
A18/RST
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
PIN DESCRIPTION
A
0
–A
18
CE
GND
DQ
0
–DQ
7
V
CC
WE
OE
RST
– Address Inputs
– Chip Enable
– Ground
– Data In/Data Out
– Power (+5V)
– Write Enable
– Output Enable
– Reset
DESCRIPTION
The DS1251Y 4096K NV SRAM with Phantom Clock is
a fully static nonvolatile RAM (organized as 512K words
by 8 bits) with a built–in real time clock. The DS1251Y
has a self–contained lithium energy source and control
circuitry which constantly monitors V
CC
for an out–of–
tolerance condition. When such a condition occurs, the
lithium energy source is automatically switched on and
write protection is unconditionally enabled to prevent
garbled data in both the memory and real time clock.
The Phantom Clock provides timekeeping information
including hundredths of seconds, seconds, minutes,
hours, day, date, month, and year information. The date
at the end of the month is automatically adjusted for
months with less than 31 days, including correction for
leap years. The Phantom Clock operates in either
24–hour or 12–hour format with an AM/PM indicator.
相關PDF資料 |
PDF描述 |
|---|---|
| DS1258AB | 128K x 16 Nonvolatile SRAM(128K x 16 非易失性靜態(tài)RAM) |
| DS1258Y | 128K x 16 Nonvolatile SRAM(128K x 16 非易失性靜態(tài)RAM) |
| DS1258W | 3.3V 128K x 16 Nonvolatile SRAM(3.3V 128K x 16 非易失性靜態(tài)RAM) |
| DS1259 | Battery Manager Chip(電池管理芯片) |
| DS1260 | Smart Battery(智能電池) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS1251Y-120 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:4096K NV SRAM with Phantom Clock |
| DS1251Y-150 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS1251Y-70 | 功能描述:實時時鐘 4096K NV SRAM w/Phantom Clock 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 |
| DS1251Y-70+ | 功能描述:實時時鐘 4096K NV SRAM w/Phantom Clock 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 |
| DS1251YP | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:4096k NV SRAM with Phantom Clock |
發(fā)布緊急采購，3分鐘左右您將得到回復。