欢迎访问ic37.com |
会员登录 免费注册
发布采购

WME128K8-125DEM 参数 Datasheet PDF下载

WME128K8-125DEM图片预览
型号: WME128K8-125DEM
PDF下载: 下载PDF文件 查看货源
内容描述: [EEPROM,]
分类和应用: 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内存集成电路
文件页数/大小: 12 页 / 648 K
品牌: MERCURY [ MERCURY UNITED ELECTRONICS INC ]
 浏览型号WME128K8-125DEM的Datasheet PDF文件第2页浏览型号WME128K8-125DEM的Datasheet PDF文件第3页浏览型号WME128K8-125DEM的Datasheet PDF文件第4页浏览型号WME128K8-125DEM的Datasheet PDF文件第5页浏览型号WME128K8-125DEM的Datasheet PDF文件第7页浏览型号WME128K8-125DEM的Datasheet PDF文件第8页浏览型号WME128K8-125DEM的Datasheet PDF文件第9页浏览型号WME128K8-125DEM的Datasheet PDF文件第10页  
WME128K8-XXX  
DATA POLLING CHARACTERISTICS  
DATA POLLING  
VCC = 5.0V, VSS = 0V, -55°C TA +125°C  
The WME128K8-XXX offers a data polling feature which allows a  
faster method of writing to the device. Figure 6 shows the timing  
diagram for this function. During a byte or page write cycle, an  
attempted read of the last byte written will result in the complement  
of the written data on I/O7. Once the write cycle has been  
completed, true data is valid on all outputs and the next cycle may  
begin. Data polling may begin at any time during the write cycle.  
Parameter  
Symbol  
tdh  
Min  
10  
Max  
Unit  
ns  
Data Hold Time  
OE# Hold Time  
OE# To Output Valid  
Write Recovery Time  
toeh  
toe  
10  
ns  
55  
ns  
twr  
0
ns  
FIGURE 6 – DATA POLLING WAVEFORMS  
WE#  
CS#  
OE#  
tOEH  
tOE  
tDH  
I/O7  
HIGH Z  
tWR  
ADDRESS  
TOGGLE BUT CHARACTERISTICS(1)  
TOGGLE BIT: In addition to DATA# Polling another method for  
determining the end of a write cycle is provided . During the write  
operation, successive attempts to read data from the device will  
result in I/O6 toggling between one and zero. Once the write has  
completed, I/O6 will stop toggling and valid data will be read.  
Reading the toggle bit may begin at any time during the write cycle.  
Symbol  
tDH  
Parameter  
Min  
10  
Max  
Units  
ns  
Data Hold Time  
OE Hold Time  
tOEH  
tOE  
tOEHP  
tWR  
10  
ns  
OE to Output Delay  
OE High Pulse  
Write Recovery Time  
ns  
150  
0
ns  
ns  
WE#  
CS#  
tOEH  
OE#  
tOE  
tDH  
HIGH Z  
(2)  
I/O6  
tWR  
NOTE:  
1. Toggling either OE# or CS# or both OE# and CS# will operate toggle bit.  
2. Beginning and ending state of I/O6 will vary  
3. Any address location may be used but the address should not vary.  
6
4311.11E-0718-ss-WME128K8-XXX  
Mercury Corp. - Memory and Storage Solutions • (602) 437-1520 • www.mrcy.com