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參數(shù)資料
| 型號： | DS12887 |
| 英文描述： | Real Time Clock |
| 中文描述： | 實(shí)時時鐘 |
| 文件頁數(shù)： | 14/19頁 |
| 文件大?。?/td> | 584K |
| 代理商： | DS12887 |
DS12887
14 of 19
AC ELECTRICAL CHARACTERISTICS
(0
°
C to 70
°
C; V
CC
= 4.5V to 5.5V)
PARAMETER
SYMBOL
Cycle Time
t
CYC
Pulse Width, DS/E Low or RD/
WR
High
PW
EL
Pulse Width, DS/E High or RD/
WR
Low
PW
EH
Input Rise and Fall Time
t
R
, t
F
R/
W
Hold Time
t
RWH
R/
W
Setup Time Before DS/E
t
RWS
Chip Select Setup Time Before DS,
WR
,
or
RD
Chip Select Hold Time
t
CH
Read Data Hold Time
t
DHR
Write Data Hold Time
t
DHW
Muxed Address Valid Time to AS/ALE
Fall
Muxed Address Hold Time
t
AHL
Delay Time DS/E to AS/ALE Rise
t
ASD
Pulse Width AS/ALE High
PW
ASH
Delay Time, AS/ALE to DS/E Rise
t
ASED
Output Data Delay Time From DS/E or
RD
Data Setup Time
t
DSW
Reset Pulse Width
t
RWL
IRQ
Release from DS
t
IRDS
t
IRR
MIN
385
150
125
TYP
MAX
DC
UNITS
ns
ns
ns
ns
ns
ns
ns
NOTES
30
10
50
20
t
CS
0
ns
ns
ns
ns
10
0
30
80
t
ASL
10
20
60
40
20
ns
ns
ns
ns
ns
t
DDR
120
6
100
5
ns
μ
s
μ
s
μ
s
2
2
IRQ
Release from
RESET
NOTES:
1.
All voltages are referenced to ground.
2.
All outputs are open.
3.
The MOT pin has an internal pulldown of 20 K
.
4.
Applies to the AD0–AD7 pins, the
IRQ
pin, and the SQW pin when each is in the high impedance
state.
5.
The
IRQ
pin is open drain.
6.
Measured with a load as shown in Figure 4.
7.
Real time clock modules can be successfully processed through conventional wave–soldering
techniques as long as temperature exposure to the lithium energy source contained within does not
exceed +85
°
C. However, post-solder cleaning with water washing techniques is acceptable, provided
that ultrasonic vibration is not used to prevent damage to the crystal.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS12887+ | 功能描述:實(shí)時時鐘 RTC 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS12887A | 功能描述:實(shí)時時鐘 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 |
| DS12887A+ | 功能描述:實(shí)時時鐘 RTC 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1290 | 功能描述:計(jì)數(shù)器移位寄存器 RoHS:否 制造商:Texas Instruments 計(jì)數(shù)器類型: 計(jì)數(shù)順序:Serial to Serial/Parallel 電路數(shù)量:1 封裝 / 箱體:SOIC-20 Wide 邏輯系列: 邏輯類型: 輸入線路數(shù)量:1 輸出類型:Open Drain 傳播延遲時間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel |
| DS12C887 | 功能描述:實(shí)時時鐘 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 |
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