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參數(shù)資料
| 型號： | DS1254W |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 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> | 330K |
| 代理商： | DS1254W |
DS1254
2 of 17
DESCRIPTION
The DS1254 is a fully static nonvolatile RAM (NV SRAM) (organized as 2M works by 8 bits) with built-
in real-time clock. It has a self-contained lithium energy source and control circuitry that 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 fewer 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.
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.
Figure 1. PIN ASSIGNMENT
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
A8
A9
A10
A11
GND
A12
A13
A14
A15
A16
V
CC
Receptacles for DS3800
Battery Cap pins
GND
VBAT
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1254Y | 0 TIMER(S), REAL TIME CLOCK, PBGA168 |
| DS1284 | 1 TIMER(S), REAL TIME CLOCK, PDIP28 |
| DS1284QN | 1 TIMER(S), REAL TIME CLOCK, PQCC28 |
| DS1286 | 1 TIMER(S), REAL TIME CLOCK, DIP28 |
| DS12885 | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1254WB-150 | 功能描述:IC NVSRAM 16MBIT 150NS 168BGA 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 |
| DS1254WB2-150 | 功能描述:實(shí)時(shí)時(shí)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(shí)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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1254WB-C01 | 功能描述:實(shí)時(shí)時(shí)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(shí)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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1254WB-C02 | 功能描述:實(shí)時(shí)時(shí)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(shí)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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1254YB-100 | 功能描述:IC NVSRAM 16MBIT 100NS 168BGA 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 |
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