AT24C02A_14 Datasheet, PDF (3/16 Pages) ATMEL Corporation – Write Protect Pin for Hardware Data Protection

AT24C02A/04A
WRITE PROTECT (WP): The AT24C02A/04A have a WP pin that provides hardware
data protection. The WP pin allows normal read/write operations when connected to
ground (GND). When the WP pin is connected to V_CC, the write protection feature is
enabled and operates as shown. (See Table 1.)
Table 1. Write Protect
WP Pin Status
At V_CC
At GND
Part of the Array Protected
24C02A
24C04A
Upper Half (1K) Array
Upper Half (2K) Array
Normal Read/Write Operations
Memory Organization AT24C02A, 2K SERIAL EEPROM: The 2K is internally organized with 32 pages of 8
bytes each. Random word addressing requires an 8-bit data word address.
AT24C04A, 4K SERIAL EEPROM: The 4K is internally organized with 32 pages of 16
bytes each. Random word addressing requires a 9-bit data word address.
Table 2. Pin Capacitance
Applicable over recommended operating range from T_A = 25°C, f = 1.0 MHz, V_cc= +2.7V
Symbol
Test Condition
Max
Units
C_I/O
Input/Output Capacitance (SDA)
8
pF
C_IN
Input Capacitance (A₀, A₁, A₂, SCL)
6
pF
Note: This parameter is characterized and is not 100% tested.
Conditions
V_I/O = 0V
V_IN = 0V
Table 3. DC Characteristics
Applicable over recommended operating range from: T_A = −40°C to +125°C, V_CC = +2.7V to +5.5V
(unless otherwise noted)
Symbol Parameter
Test Condition
Min
Typ
Max
V_CC3
I_CC
I_CC
I_SB3
I_SB4
I_LI
I_LO
V_IL
V_IH
V_OL2
V_OL1
Note:
Supply Voltage
Supply Current V_CC = 5.0V
Supply Current V_CC = 5.0V
Standby Current V_CC = 2.7V
Standby Current V_CC = 5.0V
Input Leakage Current
Output Leakage Current
Input Low Level ⁽¹⁾
READ at 100 kHz
WRITE at 100 kHz
V_IN = V_CC or V_SS
V_IN = V_CC or V_SS
V_IN = V_CC or V_SS
V_OUT = V_CC or V_SS
Input High Level ⁽¹⁾
Output Low Level V_CC = 3.0V
I_OL = 2.1 mA
Output Low Level V_CC = 1.8V
I_OL = 0.15 mA
1. V_IL min and V_IH max are reference only and are not tested.
2.7
−0.6
V_CC x 0.7
0.4
2.0
1.6
8.0
0.10
0.05
5.5
1.0
3.0
4.0
18.0
3.0
3.0
V_CC x 0.3
V_CC + 0.5
0.4
0.2
Units
V
mA
mA
µA
µA
µA
µA
V
V
V
V
3
5083D–SEEPR–4/07