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AT49BV020-90VI fiches techniques PDF

ATMEL Corporation - 2-Megabit 256K x 8 Single 2.7-volt Battery-Voltage Flash Memory

Numéro de référence AT49BV020-90VI
Description 2-Megabit 256K x 8 Single 2.7-volt Battery-Voltage Flash Memory
Fabricant ATMEL Corporation 
Logo ATMEL Corporation 





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AT49BV020-90VI fiche technique
Features
Single Supply Voltage, Range 2.7V to 3.6V
Single Supply for Read and Write
Fast Read Access Time - 70 ns
Internal Program Control and Timer
8K bytes Boot Block With Lockout
Fast Erase Cycle Time - 10 seconds
Byte By Byte Programming - 30 µs/Byte typical
Hardware Data Protection
DATA Polling For End Of Program Detection
Low Power Dissipation
– 25 mA Active Current
– 50 µA CMOS Standby Current
Typical 10,000 Write Cycles
Description
The AT49BV020 and the AT49LV020 are 3-volt-only, 2 megabit Flash memories
organized as 262,144 words of 8 bits each. Manufactured with Atmel's advanced non-
volatile CMOS technology, the devices offer access times to 70 ns with power dissipa-
tion of just 90 mW over the commercial temperature range. When the device is dese-
lected, the CMOS standby current is less than 50 µA.
To allow for simple in-system reprogrammability, the AT49BV/LV020 does not require
high input voltages for programming. Three-volt-only commands determine the read
and programming operation of the device. Reading data out of the device is similar to
reading from an EPROM. Reprogramming the AT49BV/LV020 is performed by eras-
ing the entire 2 megabits of memory and then programming on a byte by byte basis.
The typical byte programming time is a fast 30 µs. The end of a program cycle can be
optionally detected by the DATA polling feature. Once the end of a byte program cycle
has been detected, a new access for a read or program can begin. The typical num-
ber of program and erase cycles is in excess of 10,000 cycles.
Pin Configuration
(continued)
Pin Name
A0 - A17
CE
OE
WE
I/O0 - I/O7
NC
Function
Addresses
Chip Enable
Output Enable
Write Enable
Data Inputs/Outputs
No Connect
VSOP Top View (8 x 14mm) or
TSOP Top View (8 x 20mm)
Type 1
PLCC Top View
2-Megabit
(256K x 8)
Single 2.7-volt
Battery-Voltage
Flash Memory
AT49BV020
AT49LV020
Rev. 0678C–03/98
1

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No Description détaillée Fabricant
AT49BV020-90VC 2-Megabit 256K x 8 Single 2.7-volt Battery-Voltage Flash Memory ATMEL Corporation
ATMEL Corporation
AT49BV020-90VI 2-Megabit 256K x 8 Single 2.7-volt Battery-Voltage Flash Memory ATMEL Corporation
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