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PDF AT24C32 Data sheet ( Hoja de datos )
| Número de pieza | AT24C32 | |
| Descripción | 2-Wire Serial EEPROM | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Low-Voltage and Standard-Voltage Operation
– 2.7 (VCC = 2.7V to 5.5V)
– 1.8 (VCC = 1.8V to 5.5V)
• Low-Power Devices (ISB = 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
Pin Configurations
Pin Name
A0 - A2
SDA
SCL
WP
Function
Address Inputs
Serial Data
Serial Clock Input
Write Protect
8-Pin PDIP
A0
A1
A2
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
8-Pin TSSOP
A0
A1
A2
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
8-Pin SOIC
A0
A1
A2
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
2-Wire, 32K
Serial E2PROM
Rev. 0336K–SEEPR–7/03
1
1 page  
AT24C32/64
AC Characteristics
Applicable over recommended operating range from TA = -40°C to +85°C, VCC = +1.8V to +5.5V, CL = 1 TTL Gate and 100
pF (unless otherwise noted).
1.8-volt
2.7-, 2.5-volt
5.0-volt
Symbol
Parameter
Min Max Min Max Min Max Units
fSCL
tLOW
tHIGH
tI
tAA
tBUF
Clock Frequency, SCL
Clock Pulse Width Low
Clock Pulse Width High
Noise Suppression Time(1)
Clock Low to Data Out Valid
Time the bus must be free
before a new transmission can start(1)
100 100 400 kHz
4.7 4.7 1.2
µs
4.0 4.0 0.6
µs
100 100
50 ns
0.1 4.5 0.1 4.5 0.1 0.9
µs
4.7 4.7 1.2
µs
tHD.STA
Start Hold Time
4.0 4.0 0.6
µs
tSU.STA
Start Set-up Time
4.7 4.7 0.6
µs
tHD.DAT
Data In Hold Time
0 0 0 µs
tSU.DAT
tR
tF
Data In Set-up Time
Inputs Rise Time(1)
Inputs Fall Time(1)
200 200 100
1.0 1.0 0.3
300 300 300
ns
µs
ns
tSU.STO
Stop Set-up Time
4.7 4.7 0.6
µs
tDH Data Out Hold Time
100 100
50
ns
tWR Write Cycle Time
20 10 10 ms
Endurance(1)
5.0V, 25°C, Page Mode
1M
1M
1M
Write
Cycles
Note: 1. This parameter is characterized and is not 100% tested.
0336K–SEEPR–7/03
5
5 Page 
Figure 1. Device Address
Figure 2. Byte Write
Figure 3. Page Write
Note: 1. * = DON’T CARE bits
2. † = DON’T CARE bits for the 32K
0336K–SEEPR–7/03
AT24C32/64
11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet AT24C32.PDF ] | |
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