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AT24C64B
pling to the circuit board V CC plane is <3pF. If coupling is >3pF, Atmel recommends connecting
the address pins to GND.
WRITE PROTECT (WP): The write protect input, when connected to GND, allows normal write
operations. When WP is connected high to V CC , all write operations to the upper quandrant (16K
bits) of memory are inhibited. If the pin is left floating, the WP pin will be internally pulled down to
GND if the capacitive coupling to the circuit board V CC plane is <3pF. If coupling is >3pF, Atmel
recommends connecting the pin to GND.
3. Memory Organization
AT24C64B, 64K SERIAL EEPROM: The 64K is internally organized as 256 pages of 32 bytes
each. Random word addressing requires a 13 bit data word address.
Pin Capacitance (1)
Applicable over recommended operating range from T A = 25 ° C, f = 1.0 MHz, V CC = +1.8V
Symbol
C I/O
C IN
Test Condition
Input/Output Capacitance (SDA)
Input Capacitance (A 0 , A 1 , A 2 , SCL)
Max
8
6
Units
pF
pF
Conditions
V I/O = 0V
V IN = 0V
Note:
1. This parameter is characterized and is not 100% tested.
DC Characteristics
Applicable over recommended operating range from: T AI = -40 to +85 ° C, V CC = +1.8 to +5.5V (unless otherwise noted)
Symbol
V CC1
V CC2
V CC3
I CC1
I CC2
Parameter
Supply Voltage
Supply Voltage
Supply Voltage
Supply Current
Supply Current
Test Condition
V CC = 5.0V
V CC = 5.0V
READ at 400 kHz
WRITE at 400 kHz
Min
1.8
2.7
4.5
Typ
0.4
2.0
Max
5.5
5.5
5.5
1.0
3.0
Units
V
V
V
mA
mA
Input High Level
I SB1
I SB2
I SB3
I LI
I LO
V IL
V IH
V OL2
V OL1
Standby Current
(1.8V option)
Standby Current
(2.7V option)
Standby Current
(5V option)
Input Leakage
Current
Output Leakage
Current
Input Low Level (1)
(1)
Output Low Level
Output Low Level
V CC = 1.8V
V CC = 2.7V
V CC = 4.5 - 5.5V
V IN = V CC or V SS
V OUT = V CC or V SS
V CC = 3.0V
V CC = 1.8V
V IN = V CC or V SS
V IN = V CC or V SS
V IN = V CC or V SS
I OL = 2.1 mA
I OL = 0.15 mA
-0.6
V CC x 0.7
0.10
0.05
1.0
2.0
6.0
3.0
3.0
V CC x 0.3
V CC + 0.5
0.4
0.2
μ A
μ A
μ A
μ A
μ A
V
V
V
V
Note:
1. V IL min and V IH max are reference only and are not tested.
3
3350E–SEEPR–9/07
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