欢迎访问ic37.com |
会员登录 免费注册
发布采购

MBM29LV008BA-12PTN 参数 Datasheet PDF下载

MBM29LV008BA-12PTN图片预览
型号: MBM29LV008BA-12PTN
PDF下载: 下载PDF文件 查看货源
内容描述: 8M ( 1M ×8 )位 [8M (1M X 8) BIT]
分类和应用: 内存集成电路光电二极管
文件页数/大小: 51 页 / 419 K
品牌: FUJITSU [ FUJITSU ]
 浏览型号MBM29LV008BA-12PTN的Datasheet PDF文件第5页浏览型号MBM29LV008BA-12PTN的Datasheet PDF文件第6页浏览型号MBM29LV008BA-12PTN的Datasheet PDF文件第7页浏览型号MBM29LV008BA-12PTN的Datasheet PDF文件第8页浏览型号MBM29LV008BA-12PTN的Datasheet PDF文件第10页浏览型号MBM29LV008BA-12PTN的Datasheet PDF文件第11页浏览型号MBM29LV008BA-12PTN的Datasheet PDF文件第12页浏览型号MBM29LV008BA-12PTN的Datasheet PDF文件第13页  
MBM29LV008TA-70/-90/-12/MBM29LV008BA-70/-90/-12  
FUNCTIONAL DESCRIPTION  
Read Mode  
The MBM29LV008TA/BA have two control functions which must be satisfied in order to obtain data at the outputs.  
CE is the power control and should be used for a device selection. OE is the output control and should be used  
to gate data to the output pins if a device is selected.  
Address access time (tACC) is equal to the delay from stable addresses to valid output data. The chip enable  
access time (tCE) is the delay from stable addresses and stable CE to valid data at the output pins. The output  
enable access time is the delay from the falling edge of OE to valid data at the output pins. (Assuming the  
addresses have been stable for at least tACC-tOE time.) When reading out a data without changing addresses after  
power-up, it is necessary to input hardware reset or change CE pin from “H” or “L”  
Standby Mode  
There are two ways to implement the standby mode on the MBM29LV008TA/BA devices, one using both the CE  
and RESET pins; the other via the RESET pin only.  
When using both pins, a CMOS standby mode is achieved with CE and RESET inputs both held at VCC ± 0.3 V.  
Under this condition the current consumed is less than 5 µA. The device can be read with standard access time  
(tCE) from either of these standby modes. During Embedded Algorithm operation, VCC active current (ICC2) is  
required even CE = “H”.  
When using the RESET pin only, a CMOS standby mode is achieved with RESET input held at VSS ± 0.3 V (CE  
= “H” or “L”). Under this condition the current is consumed is less than 5 µA. Once the RESET pin is taken high,  
the device requires tRH of wake up time before outputs are valid for read access.  
In the standby mode the outputs are in the high impedance state, independent of the OE input.  
Automatic Sleep Mode  
There is a function called automatic sleep mode to restrain power consumption during read-out of  
MBM29LV008TA/BA data. This mode can be used effectively with an application requested low power  
consumption such as handy terminals.  
To activate this mode, MBM29LV008TA/BA automatically switch themselves to low power mode when  
MBM29LV008TA/BA addresses remain stably during access fine of 150 ns. It is not necessary to control CE,  
WE, and OE on the mode. Under the mode, the current consumed is typically 1 µA (CMOS Level).  
Since the data are latched during this mode, the data are read-out continuously. If the addresses are changed,  
the mode is canceled automatically and MBM29LV008TA/BA read-out the data for changed addresses.  
Output Disable  
With the OE input at a logic high level (VIH), output from the devices are disabled. This will cause the output pins  
to be in a high impedance state.  
Autoselect  
The autoselect mode allows the reading out of a binary code from the devices and will identify its manufacturer  
and type. This mode is intended for use by programming equipment for the purpose of automatically matching  
the devices to be programmed with its corresponding programming algorithm. This mode is functional over the  
entire temperature range of the devices.  
To activate this mode, the programming equipment must force VID (11.5 V to 12.5 V) on address pin A9. Two  
identifier bytes may then be sequenced from the devices outputs by toggling address A0 from VIL to VIH. All  
addresses are DON’T CARES except A0, A1, A6, and A10. (See Table 3.1.)  
9