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PDF AT25256-10CC-1.8 Data sheet ( Hoja de datos )
| Número de pieza | AT25256-10CC-1.8 | |
| Descripción | SPI Serial EEPROMs | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Serial Peripheral Interface (SPI) Compatible
• Supports SPI Modes 0 (0,0) and 3 (1,1)
• Low Voltage and Standard Voltage Operation
– 5.0 (VCC = 4.5V to 5.5V)
– 2.7 (VCC = 2.7V to 5.5V)
– 1.8 (VCC = 1.8V to 3.6V)
• 3 MHz Clock Rate
• 64-Byte Page Mode and Byte Write Operation
• Block Write Protection
– Protect 1/4, 1/2, or Entire Array
• Write Protect (WP) Pin and Write Disable Instructions for
Both Hardware and Software Data Protection
• Self-Timed Write Cycle (5 ms Typical)
• High Reliability
– Endurance: 100,000 Write Cycles
– Data Retention: >200 Years
– ESD Protection: >4000V
• Automotive Grade and Extended Temperature Devices Available
• 8-Pin PDIP, 8-Pin EIAJ SOIC, 8-Pin and 16-Pin JEDEC SOIC, 14-Pin and 20-Pin TSSOP,
and 8-Pin Leadless Array Packages
Description
The AT25128/256 provides 131,072/262,144 bits of serial electrically erasable pro-
grammable read only memory (EEPROM) organized as 16,384/32,768 words of 8 bits
each. The device is optimized for use in many industrial and commercial applications
where low power and low voltage operation are essential. The devices are available in
Pin Configurations
(continued)
Pin Name Function
14-Lead TSSOP
CS
SCK
SI
SO
GND
VCC
WP
HOLD
NC
DC
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Power Supply
Write Protect
Suspends Serial Input
No Connect
Don't Connect
CS
SO
NC
NC
NC
WP
GND
1
2
3
4
5
6
7
14 VCC
13 HOLD
12 NC
11 NC
10 NC
9 SCK
8 SI
16-Pin SOIC
CS
SO
NC
NC
NC
NC
WP
GND
1
2
3
4
5
6
7
8
16 VCC
15 HOLD
14 NC
13 NC
12 NC
11 NC
10 SCK
9 SI
20-Lead TSSOP*
NC
CS
SO
SO
NC
NC
WP
GND
DC
NC
1
2
3
4
5
6
7
8
9
10
20 NC
19 VCC
18 HOLD
17 HOLD
16 NC
15 NC
14 SCK
13 SI
12 DC
11 NC
SPI Serial
EEPROMs
128K (16,384 x 8)
256K (32,768 x 8)
AT25128
AT25256
8-Pin PDIP
8-Pin SOIC
8-Pin Leadless Array
CS
SO
WP
GND
1
2
3
4
8 VCC
7 HOLD
6 SCK
5 SI
CS
SO
WP
GND
1
2
3
4
8 VCC
7 HOLD
6 SCK
5 SI
VCC 8
HOLD 7
SCK 6
SI 5
1 CS
2 SO
3 WP
4 GND
Bottom View
*Note: Pins 3, 4 and 17, 18 are internally connected for 14-lead TSSOP socket compatibility.
Rev. 0872E–08/98
1
1 page  
AT25128/256
AC Characteristics (Continued)
Applicable over recommended operating range from TA = -40°C to + 85°C, VCC = As Specified,
CL = 1 TTL Gate and 100 pF (unless otherwise noted).
Symbol
Parameter
Voltage
Min
tLZ Hold to Output Low Z
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
0
0
0
tHZ Hold to Output High Z
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
tDIS Output Disable Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
tWC Write Cycle Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
Endurance(1) 5.0V, 25°C, Page Mode
100K
Note: 1. This parameter is characterized and is not 100% tested. Contact Atmel for further information.
Max
100
200
300
100
200
300
200
250
1000
5
10
10
Units
ns
ns
ns
ms
Write
Cycles
5
5 Page 
WRITE Timing
AT25128/256
HOLD Timing
CS
SCK
HOLD
SO
tCD
tHD
tHZ
tCD
tHD
tLZ
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet AT25256-10CC-1.8.PDF ] | |
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