M29F040B120K1T Micron Technology Inc, M29F040B120K1T Datasheet - Page 5

• Manufacturer Part Number: M29F040B120K1T
• Manufacturer: Micron Technology Inc

Specifications of M29F040B120K1T

• Cell Type: NOR
• Density: 4Mb
• Access Time (max): 120ns
• Interface Type: Parallel
• Boot Type: Not Required
• Address Bus: 19b
• Operating Supply Voltage (typ): 5V
• Operating Temp Range: 0C to 70C
• Package Type: PLCC
• Program/erase Volt (typ): 4.5 to 5.5V
• Sync/async: Asynchronous
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Word Size: 8b
• Number Of Words: 512K
• Supply Current: 15mA
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / Rohs Status: Not Compliant

Automatic Standby. If CMOS levels (V
are used to drive the bus and the bus is inactive for
150ns or more the memory enters Automatic
Standby where the internal Supply Current is re-
duced to the CMOS Standby Supply Current, I
The Data Inputs/Outputs will still output data if a
Bus Read operation is in progress.
Special Bus Operations
Additional bus operations can be performed to
read the Electronic Signature and also to apply
and remove Block Protection. These bus opera-
tions are intended for use by programming equip-
ment and are not usually used in applications.
They require V
Table 4. Bus Operations
Note: X = V
Bus Read
Bus Write
Output Disable
Standby
Read Manufacturer
Code
Read Device Code
Operation
IL
or V
IH
.
ID
to be applied to some pins.
V
V
V
V
V
E
X
IH
IL
IL
IL
IL
V
V
V
V
V
G
X
CC
IH
IH
IL
IL
IL
± 0.2V)
CC3
V
V
V
V
V
.
W
X
IH
IH
IH
IH
IL
Electronic Signature. The memory has two
codes, the manufacturer code and the device
code, that can be read to identify the memory.
These codes can be read by applying the signals
listed in Table 4, Bus Operations.
Block Protection and Blocks Unprotection. Each
block can be separately protected against acci-
dental Program or Erase. Protected blocks can be
unprotected to allow data to be changed. Block
Protection and Blocks Unprotection operations
must only be performed on programming equip-
ment. For further information refer to Application
Note AN1122, Applying Protection and Unprotec-
tion to M29 Series Flash.
Cell Address
Command Address
X
X
A0 = V
Others V
A0 = V
Others V
IL
IH
, A1 = V
, A1 = V
IL
IL
Address Inputs
or V
or V
IH
IH
IL
IL
, A9 = V
, A9 = V
ID
ID
,
,
Inputs/Outputs
Data Output
Data Input
M29F040B
Data
Hi-Z
Hi-Z
E2h
20h
5/20