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PDF 24C64A Data sheet ( Hoja de datos )
| Número de pieza | 24C64A | |
| Descripción | AT24C64A | |
| 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 = 6 µA @ 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) and 400 kHz (2.5V) Clock Rate for AT24C32A
• 400 kHz (1.8V) Clock Rate for AT24C64A
• 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, Extended Temperature and Lead-Free Devices Available
• 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead MAP and 8-lead TSSOP Packages
Description
The AT24C32A/64A provides 32,768/65,536 bits of serial electrically erasable and
programmable 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 AT24C32A/64A is
available in space saving 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead MAP and
8-lead TSSOP 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 (8132 x 8)
AT24C32A
AT24C64A
Pin Configurations
Pin Name
A0 - A2
SDA
SCL
WP
Function
Address Inputs
Serial Data
Serial Clock Input
Write Protect
8-lead SOIC
A0
A1
A2
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
8-lead MAP
VCC
WP
SCL
SDA
8
7
6
5
1 A0
2 A1
3 A2
4 GND
Bottom View
8-lead TSSOP
A0
A1
A2
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
8-lead PDIP
A0
A1
A2
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
Rev. 3054H–SEEPR–4/03
1
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AT24C32A/64A
AC Characteristics
Applicable over recommended operating range from TAI = -40°C to +85°C, TAE = -40°C to +125°C, VCC = +1.8V to +5.5V,
CL = 1 TTL Gate and
100 pF (unless otherwise noted).
AT24C32A
AT24C64A
1.8V
2.5V – 5.0V
1.8V – 3.6V
5.0V
Symbol
Parameter
Min Max Min Max Min Max Min Max Units
fSCL
tLOW
tHIGH
tI
tAA
tBUF
Clock Frequency, SCL
100 400 400
400 kHz
Clock Pulse Width Low
4.7
1.3
1.3
1.2
µs
Clock Pulse Width High
Noise Suppression Time(1)
4.0 0.6 0.6 0.6
100 50 100
50
µs
ns
Clock Low to Data Out Valid
0.1 4.5 0.1 0.9 0.2 0.9 0.1
0.9
µs
Time the bus must be free
before a new transmission can 4.7 1.3 1.3 1.2
start(2)
µs
tHD.STA
tSU.STA
tHD.DAT
tSU.DAT
tR
tF
tSU.STO
tDH
tWR
Start Hold Time
Start Set-up Time
Data In Hold Time
Data In Set-up Time
Inputs Rise Time(2)
Inputs Fall Time(2)
Stop Set-up Time
Data Out Hold Time
Write Cycle Time
Endurance(1) 5.0V, 25°C, Page Mode
4.0 0.6 0.6 0.6
µs
4.7 0.6 0.6 0.6
µs
000 0
µs
200 100 100 100
ns
1.0 0.3 0.3
0.3 µs
300 300 300
300 ns
4.7 0.6 0.6 0.6
µs
100 50 200 50
ns
20 10 20
10 ms
1M
1M
1M
1M
Write
Cycles
Notes: 1. This parameter is characterized and is not 100% tested (TA = 25°C).
2. This parameter is characterized and is not 100% tested.
3054H–SEEPR–4/03
5
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Figure 1. Device Address
Figure 2. Byte Write
Figure 3. Page Write
Notes: 1. * = DON’T CARE bits
2. † = DON’T CARE bits for the 32K
Figure 4. Current Address Read
AT24C32A/64A
3054H–SEEPR–4/03
11
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| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet 24C64A.PDF ] | |
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