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PDF 24C256 Data sheet ( Hoja de datos )

Número de pieza 24C256
Descripción 2-Wire Serial EEPROMs
Fabricantes ATMELCorporation 
Logotipo ATMELCorporation Logotipo



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No Preview Available ! 24C256 Hoja de datos, Descripción, Manual

Features
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)
Internally Organized 16,384 x 8 and 32,768 x 8
2-Wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
1 MHz (5V), 400 kHz (2.7V) and 100 kHz (1.8V) Compatibility
Write Protect Pin for Hardware and Software Data Protection
64-Byte Page Write Mode (Partial Page Writes Allowed)
Self-Timed Write Cycle (5 ms typical)
High Reliability
– Endurance: 100,000 Write Cycles
– Data Retention: 40 Years
– ESD Protection: > 4000V
Automotive Grade and Extended Temperature Devices Available
8-Pin JEDEC PDIP, 8-Pin JEDEC and EIAJ SOIC, 14-Pin TSSOP, and
8-Pin Leadless Array Packages
Description
The AT24C128/256 provides 131,072/262,144 bits of serial electrically erasable and
programmable read only memory (EEPROM) organized as 16,384/32,768 words of 8
bits each. The device’s cascadable feature allows up to 4 devices to share a common
2-wire bus. The device is optimized for use in many industrial and commercial applica-
tions where low power and low voltage operation are essential. The devices are avail-
able in space-saving 8-pin JEDEC PDIP, 8-pin EIAJ, 8-pin JEDEC SOIC, 14-pin
TSSOP, and 8-pin LAP packages. In addition, the entire family is available in 5.0V
(4.5V to 5.5V), 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 3.6V) versions.
Pin Configurations
Pin Name
A0 to A1
SDA
SCL
WP
NC
Function
Address Inputs
Serial Data
Serial Clock Input
Write Protect
No Connect
8-Pin PDIP
A0
A1
NC
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
8-Pin SOIC
A0
A1
NC
NC
NC
NC
GND
14-Pin TSSOP
1 14
2 13
3 12
4 11
5 10
69
78
VCC
WP
NC
NC
NC
SCL
SDA
A0
A1
NC
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
8-Pin Leadless Array
VCC
WP
SCL
SDA
81
72
63
54
A0
A1
NC
GND
Bottom View
2-Wire Serial
EEPROMs
128K (16,384 x 8)
256K (32,768 x 8)
AT24C128
AT24C256
Rev. 0670C–08/98
1

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24C256 pdf
Bus Timing (SCL: Serial Clock, SDA: Serial Data I/O)
AT24C128/256
Write Cycle Timing (SCL: Serial Clock, SDA: Serial Data I/O)
SCL
SDA
8th BIT ACK
Note:
WORD n
STOP
CONDITION
tWR(1)
START
CONDITION
1. The write cycle time tWR is the time from a valid stop condition of a write sequence to the end of the internal clear/write
cycle.
5

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24C256 arduino
AT24C128 Ordering Information (Continued)
tWR (max)
(ms)
20
ICC (max)
(µA)
800
ISB (max)
(µA)
0.2
fMAX
(kHz)
100
800 0.2 100
Ordering Code
AT24C128-10PC-1.8
AT24C128N-10SC-1.8
AT24C128W-10SC-1.8
AT24C128-10CC-1.8
AT24C128C1-10CC-1.8
AT24C128T1-10TC-1.8
AT24C128-10PI-1.8
AT24C128N-10SI-1.8
AT24C128W-10SI-1.8
AT24C128-10CI-1.8
AT24C128C1-10CI-1.8
AT24C128T1-10TI-1.8
AT24C128/256
Package
8P3
8S1
8S2
8C
8C1
14T
8P3
8S1
8S2
8C
8C1
14T
Operation Range
Commercial
(0°C to 70°C)
Industrial
(-40°C to 85°C)
8C
8C1
8P3
8S1
8S2
14T
Blank
-2.7
-1.8
Package Type
8-Lead, 0.230" Wide, Leadless Array Package (LAP)
8-Lead, 0.300" Wide, Leadless Array Package (LAP)
8-Lead, 0.300" Wide, Plastic Dual Inline Package (PDIP)
8-Lead, 0.150" Wide, Plastic Gull Wing Small Outline Package (JEDEC SOIC)
8-Lead, 0.200" Wide, Plastic Gull Wing Small Outline Package (EIAJ SOIC)
14-Lead, 0.170" Wide, Thin Shrink Small Outline Package (TSSOP)
Options
Standard Operation (4.5V to 5.5V)
Low-Voltage (2.7V to 5.5V)
Low-Voltage (1.8V to 3.6V)
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