欢迎访问ic37.com |
会员登录 免费注册
发布采购

X1227S8I-2.7 参数 Datasheet PDF下载

X1227S8I-2.7图片预览
型号: X1227S8I-2.7
PDF下载: 下载PDF文件 查看货源
内容描述: 实时时钟/日历/ CPU监控器, EEPROM [Real Time Clock/Calendar/CPU Supervisor with EEPROM]
分类和应用: 计时器或实时时钟微控制器和处理器外围集成电路光电二极管监控可编程只读存储器电动程控只读存储器电可擦编程只读存储器
文件页数/大小: 28 页 / 442 K
品牌: XICOR [ XICOR INC. ]
 浏览型号X1227S8I-2.7的Datasheet PDF文件第15页浏览型号X1227S8I-2.7的Datasheet PDF文件第16页浏览型号X1227S8I-2.7的Datasheet PDF文件第17页浏览型号X1227S8I-2.7的Datasheet PDF文件第18页浏览型号X1227S8I-2.7的Datasheet PDF文件第20页浏览型号X1227S8I-2.7的Datasheet PDF文件第21页浏览型号X1227S8I-2.7的Datasheet PDF文件第22页浏览型号X1227S8I-2.7的Datasheet PDF文件第23页  
X1227  
Write Cycle Timing  
SCL  
SDA  
8th Bit of Last Byte  
ACK  
t
WC  
Stop  
Start  
Condition  
Condition  
Power Up Timing  
Symbol  
Parameter  
Min.  
Typ.(2)  
Max.  
Units  
ms  
(1)  
t
Time from Power Up to Read  
Time from Power Up to Write  
1
5
PUR  
(1)  
t
ms  
PUW  
Notes: (1) Delays are measured from the time V  
is stable until the specified operation can be initiated. These parameters are not 100%  
CC  
tested.V slew rate should be between 0.2mV/µsec and 50mV/µsec.  
CC  
(2) Typical values are for T = 25°C and V = 5.0V  
A
CC  
Nonvolatile Write Cycle Timing  
Symbol  
Parameter  
Min.  
Typ.(1)  
Max.  
Units  
(1)  
t
Write Cycle Time  
5
10  
ms  
WC  
Note: (1) t  
is the time from a valid stop condition at the end of a write sequence to the end of the self-timed internal nonvolatile write cycle.  
WC  
It is the minimum cycle time to be allowed for any nonvolatile write by the user, unless Acknowledge Polling is used.  
WATCHDOG TIMER/LOW VOLTAGE RESET OPERATING CHARACTERISTICS  
Watchdog/Low Voltage Reset Parameters (See Figures ± and 4)  
Symbols  
Parameters  
Min.  
Typ.  
Max.  
Unit  
Programmed Reset Trip Voltage  
X1227-4.5A  
X1227  
X1227-2.7A  
X1227-2.7  
4.50  
4.25  
2.75  
2.55  
4.63  
4.38  
2.85  
2.65  
4.75  
4.50  
2.95  
2.75  
V
V
PTRIP  
t
V
Detect to RESET LOW  
500  
400  
ns  
RPD  
CC  
Power Up Reset Time-out Delay  
t
100  
250  
ms  
PURST  
t
V
V
Fall Time  
Rise Time  
10  
10  
µs  
µs  
F
CC  
t
R
CC  
Watchdog Timer Period (Crystal=32.768kHz):  
WD1=0, WD0=0  
1.7  
725  
225  
1.75  
750  
250  
1.8  
775  
275  
s
ms  
ms  
t
WDO  
WD1=0, WD0=1  
WD1=1, WD0=0  
t
Watchdog Reset Time-out Delay (Crystal=32.768kHz)  
2-Wire interface  
225  
1
250  
275  
ms  
µs  
V
RST  
t
RSP  
V
Reset Valid V  
1.0  
RVALID  
CC  
Characteristics subject to change without notice. 19 of 28  
REV 1.1.20 1/13/03  
www.xicor.com  
 复制成功!