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ATMEL25256 の電気的特性と機能
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ATMEL25256のメーカーはATMEL Corporationです、この部品の機能は「(ATMEL25128 / ATMEL25256) SPI Serial EEPROMs」です。 |
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製品の詳細 ( Datasheet PDF )
| 部品番号 ATMEL25256 |
| 部品説明 (ATMEL25128 / ATMEL25256) SPI Serial EEPROMs |
| メーカ ATMEL Corporation |
ロゴ |
このページの下部にプレビューとATMEL25256ダウンロード（pdfファイル）リンクがあります。 Total 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
1 Page
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
www.DataSheet4U.com
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
3Pages
Figure 2. SPI Serial Interface
AT25128/256
Functional
www.DataSheet4U.com
Description
The AT25128/256 is designed to interface directly with the synchronous serial periph-
eral interface (SPI) of the 6800 type series of microcontrollers.
The AT25128/256 utilizes an 8-bit instruction register. The list of instructions and their
operation codes are contained in Table 5. All instructions, addresses, and data are
transferred with the MSB first and start with a high-to-low CS transition.
Table 5. Instruction Set for the AT25128/256
Instruction Name
Instruction Format
WREN
0000 X110
WRDI
0000 X100
RDSR
0000 X101
WRSR
0000 X001
READ
0000 X011
WRITE
0000 X010
Operation
Set Write Enable Latch
Reset Write Enable Latch
Read Status Register
Write Status Register
Read Data from Memory Array
Write Data to Memory Array
6 AT25128/256
0872O–SEEPR–03/05
6 Page
合計 : 22 ページ |
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| 部品番号 | 部品説明 | メーカ |
| ATMEL25256 | (ATMEL25128 / ATMEL25256) SPI Serial EEPROMs | ATMEL Corporation |