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MBM29LV080A-70PTR Datasheet(PDF) 8 Page - Fujitsu Component Limited.

Part # MBM29LV080A-70PTR
Description  8M (1M x 8) BIT
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Manufacturer  FUJITSU [Fujitsu Component Limited.]
Direct Link  http://edevice.fujitsu.com/fmd/en/index.html
Logo FUJITSU - Fujitsu Component Limited.

MBM29LV080A-70PTR Datasheet(HTML) 8 Page - Fujitsu Component Limited.

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MBM29LV080A-70/-90/-12
8
s
s
s
s FUNCTIONAL DESCRIPTION
Read Mode
The MBM29LV080A has 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 - tCE time.) See Figure 5.1 for timing specifications.
Standby Mode
There are two ways to implement the standby mode on the MBM29LV080A device, 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 max. During Embedded Algorithm operation, VCC
Active current (ICC2) is required even CE = “H”. The device can be read with standard access time (tCE) from
either of these standby modes.
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 max. 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 MBM29LV080A
data.
This mode can be used effectively with an application requested low power consumption such as handy terminals.
To activate this mode, MBM29LV080A automatically switchs itself to low power mode when MBM29LV080A
addresses remain stably during access time 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).
Standard address access timings provide new data when addresses are changed. While in sleep mode, output
data is latched and always available to the system.
Output Disable
With the OE input at a logic high level (VIH), output from the device is 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 device and will identify its manufacturer
and type. This mode is intended for use by programming equipment for the purpose of automatically matching
the device to be programmed with its corresponding programming algorithm. This mode is functional over the
entire temperature range of the device.
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 device 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.)


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