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參數(shù)資料
| 型號： | DS1254Y |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PBGA168 |
| 封裝： | BGA-168 |
| 文件頁數(shù)： | 10/17頁 |
| 文件大?。?/td> | 161K |
| 代理商： | DS1254Y |
DS1254
2 of 17
DESCRIPTION
The DS1254 is a fully static nonvolatile RAM (organized as 2M works by 8 bits) with built-in real time
clock. The DS1254 has a self-contained lithium energy source and control circuitry which constantly
monitors VCC for an out-of-tolerance condition. When such a condition occurs, the DS1254 makes use of
an attached DS3800 Battery Cap to maintain clock information and preserve stored data while protecting
that data by disallowing all memory accesses. Additionally, the DS1254 has dedicated circuitry for
monitoring the status of an attached DS3800 Battery Cap.
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.
Pin Assignment Figure 1
Because the DS1254 has a total of 168 balls and only 35 active signals, balls are wired together into
groups, thus providing redundant connections for every signal.
VCC
A7
A6
A5
GND
A4
A3
A2
A1
1
2
3
4
5
6
7
8
9
29
28
27
26
25
24
23
22
21
10
11
12
13
14
15
16
17
18
19
20
41
40
39
38
37
36
35
34
33
32
31
30
VCC
A17
A18
A19
GND
A20
CE
OE
WE
A0
DQ0
DQ1
DQ2
DQ3
GND
DQ4
DQ5
DQ6
DQ7
BW
V
CC
A
8
A
9
A
10
A
11
GND
A
12
A
13
A
14
A
15
A
16
V
CC
Receptacles for DS3800
Battery Cap pins
GND
VBAT
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS1254YB-100 | 功能描述:IC NVSRAM 16MBIT 100NS 168BGA RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 實時時鐘 系列:- 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:時鐘/日歷 特點:警報器，閏年，SRAM 存儲容量:- 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 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 供應商設備封裝:8-TDFN EP 包裝:管件 |
| DS1254YB2-100 | 功能描述:實時時鐘 2M X 8 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 |
| DS125-6-2G | 制造商:Electronic Hardware Corporation (EHC) 功能描述:CRANK HANDLE ROUND KNOB 6.35MM 制造商:EHC (ELECTRONIC HARDWARE) 功能描述:CRANK HANDLE ROUND KNOB, 6.35MM 制造商:EHC (ELECTRONIC HARDWARE) 功能描述:CRANK HANDLE ROUND KNOB, 6.35MM; Knob / Dial Style:Round with Crank Handle; Shaft Diameter:6.35mm; Knob Diameter:31.75mm; Shaft Type:Round; Knob Material:Plastic; Shaft Size:1/4 (6.35) in. (mm) ;RoHS Compliant: Yes |
| DS1258AB-100 | 功能描述:NVRAM RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| DS1258AB-100# | 功能描述:NVRAM RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
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