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參數(shù)資料
| 型號(hào)： | DS1248Y |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Using the Dallas Phantom Real Time Clocks(帶幻象實(shí)時(shí)時(shí)鐘的NVSRAM) |
| 中文描述： | 使用達(dá)拉斯幻影實(shí)時(shí)時(shí)鐘（帶幻象實(shí)時(shí)時(shí)鐘的非易失性SRAM） |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 91K |
| 代理商： | DS1248Y |
DS1248Y
1024K NV SRAM with Phantom Clock
DS1248Y
022798 1/12
FEATURES
Real time clock keeps track of hundredths of seconds,
minutes, hours, days, date of the month, months, and
years
128K 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 28–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, 150 and 200 ns access time
ORDERING INFORMATION
DS1248Y–XXX
–120
–150
–200
120 ns access
150 ns access
200 ns access
PIN ASSIGNMENT
32–PIN ENCAPSULATED PACKAGE
740 MIL FLUSH
V
CC
A15
NC
WE
A13
A8
A9
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
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
o
–A
16
CE
GND
DQ
0
–DQ
7
V
CC
WE
OE
NC
RST
– Address Inputs
– Chip Enable
– Ground
– Data In/Data Out
– Power (+5V)
– Write Enable
– Output Enable
– No Connect
– Reset
DESCRIPTION
The DS1248Y 1024K NV SRAM with Phantom Clock is
a fully static nonvolatile RAM (organized as 128K words
by 8 bits) with a built–in real time clock. The DS1248Y
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.
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| DS1249Y | 2048K Nonvolatile SRAM(2048K 非易失性靜態(tài)RAM) |
| DS1267 | Dual Digital Potentiometer Chip(雙路數(shù)字電位器芯片) |
| DS1280 | 3-Wire to Bytewide Converter Chip(3線至字節(jié)寬度（8位）轉(zhuǎn)換芯片) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1248Y-100IND | 功能描述:IC NVSRAM 1MBIT 100NS 32DIP RoHS:否 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 實(shí)時(shí)時(shí)鐘 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:時(shí)鐘/日歷 特點(diǎn):警報(bào)器，閏年，SRAM 存儲(chǔ)容量:- 時(shí)間格式:HH:MM:SS（12/24 小時(shí)） 數(shù)據(jù)格式:YY-MM-DD-dd 接口:SPI 電源電壓:2 V ~ 5.5 V 電壓 - 電源，電池:- 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 包裝:管件 |
| DS1248Y-120 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS1248Y-200 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS1248Y-70 | 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 |
| DS1248Y-70+ | 功能描述:實(shí)時(shí)時(shí)鐘 1024k 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(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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