Rainbow-electronics AT24C64 Bedienungsanleitung

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1
Features
Low-Voltage and Standard-Voltage Operation
–2.7(V
CC
=2.7Vto5.5V)
–1.8(V
CC
=1.8Vto5.5V)
Low-Power Devices (I
SB
=2 µA at 5.5V) Available
Internally Organized 4096 x 8, 8192 x 8
2-Wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
100 kHz (1.8V, 2.5V, 2.7V) and 400 kHz (5V) Clock Rate
Write Protect Pin for Hardware Data Protection
32-Byte Page Write Mode (Partial Page Writes Allowed)
Self-Timed Write Cycle (10 ms max)
High Reliability
Endurance: 1 Million Write Cycles
Data Retention: 100 Years
Automotive Grade and Extended Temperature Devices Available
8-Pin JEDEC PDIP, 8-Pin JEDEC SOIC, 8-Pin EIAJ SOIC,
and 8-pin TSSOP Packages
Description
The AT24C32/64 provides 32,768/65,536 bits of serial electrically erasable and pro-
grammable read only memory (EEPROM) organized as 4096/8192 words of 8 bits
each. The device’s cascadable feature allows up to 8 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 AT24C32/64 is
available in space saving 8-pin JEDEC PDIP, 8-pin JEDEC SOIC, 8-pin EIAJ SOIC,
and 8-pin TSSOP (AT24C64) packages and is accessed via a 2-wire serial interface.
In addition, the entire family is available in 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 5.5V)
versions.
2-Wire
Serial EEPROM
32K (4096 x 8)
64K (8192 x 8)
AT24C32
AT24C64
Rev. 0336I–SEEPR–07/02
2-Wire, 32K
Serial E
2
PROM
Pin Configurations
Pin Name Function
A0 - A2 Address Inputs
SDA Serial Data
SCL Serial Clock Input
WP Write Protect
8-Pin PDIP
1
2
3
4
8
7
6
5
A0
A1
A2
GND
VCC
WP
SCL
SDA
8-Pin SOIC
1
2
3
4
8
7
6
5
A0
A1
A2
GND
VCC
WP
SCL
SDA
8-Pin TSSOP
1
2
3
4
8
7
6
5
A0
A1
A2
GND
VCC
WP
SCL
SDA
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Inhaltsverzeichnis

Seite 1 - Pin Configurations

1Features• Low-Voltage and Standard-Voltage Operation–2.7(VCC=2.7Vto5.5V)–1.8(VCC=1.8Vto5.5V)• Low-Power Devices (ISB=2 µA at 5.5V) Available• Interna

Seite 2

10AT24C32/640336I–SEEPR–07/02ReadOperationsRead operations are initiated the same way as write operations with the exception that theread/write select

Seite 3

11AT24C32/640336I–SEEPR–07/02Figure 1. Device AddressFigure 2. Byte WriteFigure 3. Page WriteNote: 1. * = DON’TCAREbits2. † =DON’T CARE bits for the 3

Seite 4

12AT24C32/640336I–SEEPR–07/02Figure 4. Current Address ReadFigure 5. Random ReadNote: 1. * = DON’TCAREbitsFigure 6. Sequential Read

Seite 5

13AT24C32/640336I–SEEPR–07/02Note: For 2.7V devices used in the 4.5V to 5.5V range, please refer to performance values in the AC and DC characteristic

Seite 6

14AT24C32/640336I–SEEPR–07/02Note: For 2.7V devices used in the 4.5V to 5.5V range, please refer to performance values in the AC and DC characteristic

Seite 7

15AT24C32/640336I–SEEPR–07/02Packaging Information8P3 – PDIP2325 Orchard ParkwaySan Jose, CA 95131TITLEDRAWING NO.RREV. 8P3, 8-lead, 0.300" Wid

Seite 8

16AT24C32/640336I–SEEPR–07/028S1 – JEDEC SOIC 2325 Orchard Parkway San Jose, CA 95131TITLEDRAWING NO.RREV. Note:10/10/018S1, 8-lead (0.150" W

Seite 9

17AT24C32/640336I–SEEPR–07/028S2 – EIAJ SOIC2325 Orchard ParkwaySan Jose, CA 95131TITLEDRAWING NO.RREV. 8S2, 8-lead, 0.209" Body, Plastic Small

Seite 10 - AT24C32/64

18AT24C32/640336I–SEEPR–07/028A2 – TSSOP2325 Orchard ParkwaySan Jose, CA 95131TITLEDRAWING NO.RREV. 5/30/02COMMON DIMENSIONS(Unit of Measure = mm)SY

Seite 11

Printed on recycled paper.© Atmel Corporation 2002.Atmel Corporation makes no warranty for the use of its products, other than those expressly contain

Seite 12

2AT24C32/640336I–SEEPR–07/02Block DiagramAbsolute Maximum Ratings*Operating Temperature... -55°Cto+125°C*NOTICE: Stress

Seite 13

3AT24C32/640336I–SEEPR–07/02Pin Description SERIAL CLOCK (SCL): The SCL input is used to positive edge clock data into eachEEPROM device and negative

Seite 14

4AT24C32/640336I–SEEPR–07/02Note: 1. This parameter is characterized and is not 100% tested.Note: 1. VILmin and VIHmax are reference only and are not

Seite 15

5AT24C32/640336I–SEEPR–07/02Note: 1. This parameter is characterized and is not 100% tested.AC CharacteristicsApplicable over recommended operating ra

Seite 16

6AT24C32/640336I–SEEPR–07/02Device Operation CLOCK and DATA TRANSITIONS: The SDA pin is normally pulled high with an exter-nal device. Data on the SDA

Seite 17

7AT24C32/640336I–SEEPR–07/02Bus TimingSCL: Serial Clock, SDA: Serial Data I/OWrite Cycle TimingSCL: Serial Clock, SDA: Serial Data I/ONote: 1. The wri

Seite 18

8AT24C32/640336I–SEEPR–07/02Data ValidityStart and Stop DefinitionOutput Acknowledge

Seite 19 - 0336I–SEEPR–07/02 xM

9AT24C32/640336I–SEEPR–07/02Device Addressing The 32K/64K EEPROM requires an 8-bit device address word following a start conditiontoenablethechipforar

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