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ATMEL25256 PDF даташит
| Спецификация ATMEL25256 изготовлена «ATMEL Corporation» и имеет функцию, называемую «(ATMEL25128 / ATMEL25256) SPI Serial EEPROMs». |
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Детали детали
| Номер произв | ATMEL25256 |
| Описание | (ATMEL25128 / ATMEL25256) SPI Serial EEPROMs |
| Производители | ATMEL Corporation |
| логотип |  |
22 Pages
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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
– 2.7 (VCC = 2.7V to 5.5V)
– 1.8 (VCC = 1.8V to 5.5V)
• 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
• Automotive Grade, Extended Temperature and Lead-Free Devices Available
• 8-lead PDIP, 8-lead EIAJ SOIC, 8-lead and 16-lead JEDEC SOIC, 14-lead and 20-lead
TSSOP, and 8-lead 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
space saving 8-lead PDIP (AT25128/256), 8-lead EIAJ SOIC (AT25128/256), 8-lead
and 16-lead JEDEC SOIC (AT25128), 14-lead TSSOP (AT25128), 20-lead TSSOP
(AT25128/256), and 8-lead Leadless Array (AT25256) packages. In addition, the entire
family is available in 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 5.5V) versions.
Table 1. Pin Configuration
Pin Name Function
CS Chip Select
SCK
Serial Data Clock
wwwS.IDataSheet4U.Scoemrial Data Input
SO Serial Data Output
GND
Ground
VCC
Power Supply
14-lead TSSOP
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
8-lead PDIP
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
WP
HOLD
NC
DC
Write Protect
Suspends Serial
Input
No Connect
Don't Connect
CS
SO
WP
GND
1
2
3
4
8 VCC
7 HOLD
6 SCK
5 SI
16-lead 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
8-lead Leadless Array
VCC 8
HOLD 7
SCK 6
SI 5
1 CS
2 SO
3 WP
4 GND
Bottom View
8-lead SOIC
CS
SO
WP
GND
1
2
3
4
8 VCC
7 HOLD
6 SCK
5 SI
*Note: Pins 3, 4 and 17, 18 are internally connected for 14-lead TSSOP socket compatibility.
SPI Serial
EEPROMs
128K (16,384 x 8)
256K (32,768 x 8)
AT25128(1)
AT25256(2)
Notes:
1. This device is not rec-
ommended for new
designs. Please refer
to AT25128A.
2. This device is not rec-
ommended for new
designs. Please refer
to AT25256A.
Rev. 0872O–SEEPR–03/05
1
No Preview Available ! |
The AT25128/256 is enabled through the Chip Select pin (CS) and accessed via a 3-
wire interface consisting of Serial Data Input (SI), Serial Data Output (SO), and Serial
Clock (SCK). All programming cycles are completely self-timed, and no separate Erase
cycle is required before Write.
Block Write protection is enabled by programming the status register with top ¼, top ½
or entire array of write protection. Separate Program Enable and Program Disable
instructions are provided for additional data protection. Hardware data protection is pro-
vided via the WP pin to protect against inadvertent write attempts to the status register.
The HOLD pin may be used to suspend any serial communication without resetting the
serial sequence.
Absolute Maximum Ratings*
Operating Temperature..................................–55°C to +125°C
Storage Temperature .....................................–65°C to +150°C
Voltage on Any Pin
with Respect to Ground .................................... –1.0V to +7.0V
Maximum Operating Voltage .......................................... 6.25V
DC Output Current........................................................ 5.0 mA
*NOTICE:
Stresses beyond those listed under “Absolute Maxi-
mum Ratings” may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions beyond those indicated in the operational sec-
tions of this specification is not implied. Exposure to
absolute maximum rating conditions for extended
periods may affect device reliability.
Figure 1. Block Diagram
www.DataSheet4U.com
16384/32768 x 8
2 AT25128/256
0872O–SEEPR–03/05
No Preview Available ! |
AT25128/256
Table 2. Pin Capacitance(1)
Applicable over recommended operating range from TA = 25°C, f = 1.0 MHz, VCC = +5.0V (unless otherwise noted)
Symbol Test Conditions
Max
Units
Conditions
COUT
CIN
Note:
Output Capacitance (SO)
Input Capacitance (CS, SCK, SI, WP, HOLD)
1. This parameter is characterized and is not 100% tested.
8 pF VOUT = 0V
6 pF VIN = 0V
Table 3. DC Characteristics
Applicable over recommended operating range from TAI = –40°C to +85°C, VCC = +1.8V to +5.5V,
TAE = –40°C to +125°C, VCC = +1.8V to +5.5V(unless otherwise noted)
Symbol Parameter
Test Condition
Min Typ
Max
VCC1
Supply Voltage
1.8 5.5
VCC2
Supply Voltage
2.7 5.5
VCC3
Supply Voltage
4.5 5.5
ICC1 Supply Current VCC = 5.0V at 1 MHz, SO = Open, Read
2.0 3.0
ICC2
Supply Current
VCC = 5.0V at 2 MHz,
SO = Open, Read, Write
3.0 5.0
ISB1
Standby Current
VCC = 1.8V, CS = VCC
ISB2
Standby Current
VCC = 2.7V, CS = VCC
ISB3
Standby Current
VCC = 5.0V, CS = VCC
IIL
Input Leakage
VIN = 0V to VCC
IOL
VIL(1)
Output Leakage
Input Low-voltage
VIN = 0V to VCC, TAC = 0°C to 70°C
VIH(1)
Input High-voltage
VOL1
Output Low-voltage
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VOH1
Output High-voltage
4.5 ≤ VCC ≤ 5.5V
IOL = 3.0 mA
IOH = –1.6 mA
VOL2
VOH2
Note:
Output Low-voltage
Output High-voltage
1.8V ≤ VCC ≤ 3.6V
IOL = 0.15 mA
IOH = –100 µA
1. VIL and VIH max are reference only and are not tested.
–3.0
–3.0
–1.0
VCC x 0.7
VCC - 0.8
VCC - 0.2
0.1 2.0
0.2 2.0
2.0 5.0
3.0
3.0
VCC x 0.3
VCC + 0.5
0.4
0.2
Units
V
V
V
mA
mA
µA
µA
µA
µA
µA
V
V
V
V
V
V
0872O–SEEPR–03/05
3
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| Номер в каталоге | Описание | Производители |
| ATMEL25256 | (ATMEL25128 / ATMEL25256) SPI Serial EEPROMs | ATMEL Corporation |
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|
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