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PDF LE25U20AFD Data sheet ( Hoja de datos )
| Número de pieza | LE25U20AFD | |
| Descripción | 2M-bit (256K x 8) Serial Flash Memory | |
| Fabricantes | ON Semiconductor | |
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LE25U20AFD
Advance Information
CMOS IC
2M-bit (256K x 8)
Serial Flash Memory
www.onsemi.com
Overview
The LE25U20AFD is a serial interface-compatible flash memory device
with a 256K 8-bit configuration. It uses a single 2.5V power supply.
While making the most of the features inherent to a serial flash memory
device, the LE25U20AFD is housed in an 8-pin ultra-miniature package.
These features make this device ideally suited to storing program codes in
applications such as portable information devices, which are required to
have increasingly more compact dimensions. Moreover, by using the small
sector erase function this product is also suitable for the parameter or the
date storage usage with comparatively little rewriting times that becomes a
capacity shortage in EEPROM.
VSOIC8 NB
Features
Read / write operations enabled by single 2.5V power supply: 2.30 to 3.60V supply voltage range
Operating frequency : 30MHz
Temperature range
: 40 to 85C
Serial interface
: SPI mode 0, mode 3 supported
Sector size
: 4K bytes/small sector, 64K bytes/sector
Small sector erase, sector erase, chip erase functions
Page program function (256 bytes / page)
Block protect function
Status functions
: Ready/busy information, protect information
Highly reliable read/write
Number of rewrite times : 100,000 times
Small sector erase time : 40ms (typ.), 150ms (max.)
Sector erase time
: 80ms (typ.), 250ms (max.)
Chip erase time
: 250ms (typ.), 1.6s (max.)
Page program time : 4.0ms/256 bytes (typ.), 5.0ms/256 bytes (max.)
Data retention period : 20 years
Package
: VSOIC8 NB
* This product is licensed from Silicon Storage Technology, Inc. (USA).
This document contains information on a new product. Specifications and information
herein are subject to change without notice.
ORDERING INFORMATION
See detailed ordering and shipping information on page 21 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
October 2014 - Rev. P0
1
Publication Order Number :
LE25U20AFD/D
1 page  
CS
SCK
SI
SO
LE25U20AFD
tCPH
tCSH
tCSS
tDS tDH
DATA VALID
High Impedance
tCLHI tCLLO tCSH
tCSS
High Impedance
Figure 4 Serial Output Timing
CS
SCK
SO
SI
tCLZ
tHO
DATA VALID
tV
tCHZ
www.onsemi.com
5
5 Page 
LE25U20AFD
6. Small Sector Erase
Small sector erase is an operation that sets the memory cell data in any small sector to "1". A small sector consists of
4Kbytes. "Figure 12 Small Sector Erase" shows the timing waveforms, and Figure 21 shows a small sector erase
flowchart. The small sector erase command consists of the first through fourth bus cycles, and it is initiated by
inputting the 24-bit addresses following (D7h/20h). Addresses A17 to A12 are valid, and Addresses A23 to A18 are
"don't care". After the command has been input, the internal erase operation starts from the rising CS edge, and it ends
automatically by the control exercised by the internal timer. Erase end can also be detected using status register RDY.
Figure 12 Small Sector Erase
CS
Self-timed
Erase Cycle
tSSE
SCK
SI
Mode3 0 1 2 3 4 5 6 7 8
Mode0
15 16 23 24 31
8CLK
D7h/20h
Add. Add. Add.
High Impedance
SO
7. Sector Erase
Sector erase is an operation that sets the memory cell data in any sector to "1". A sector consists of 64Kbytes. "Figure
13 Sector Erase" shows the timing waveforms, and Figure 21 shows a sector erase flowchart. The sector erase command
consists of the first through fourth bus cycles, and it is initiated by inputting the 24-bit addresses following (D8h).
Addresses A17 to A16 are valid, and Addresses A23 to A18 are "don't care". After the command has been input, the
internal erase operation starts from the rising CS edge, and it ends automatically by the control exercised by the internal
timer. Erase end can also be detected using status register RDY.
Figure 13 Sector Erase
CS
Self-timed
Erase Cycle
tSE
SCK
SI
Mode3
Mode0
012345678
15 16 23 24 31
8CLK
D8h Add. Add. Add.
High Impedance
SO
www.onsemi.com
11
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| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet LE25U20AFD.PDF ] | |
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