A24C256
AiT Semiconductor Inc.
www.ait-ic.com
MEMORY EEPROM
256k BITS (32768 X 8) TWO-WIRE SERIAL
AC ELECTRICAL CHARACTERISTICS
Applicable over recommended operating range from: TA = -40℃ to +85℃, VCC = +1.7V to +5.5V, CL = 1 TTL
Gate and 100pF, unless otherwise noted
1.7V≤VCC<2.5V
2.5V≤VCC<5.5V
Parameter
Symbol
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
Clock Frequency, SCL
Clock Pulse Width Low
Clock Pulse Width High
Noise Suppression Time
Clock Low to Data Out Valid
Time the bus must be free before
a new transmission can start
Start Hold Time
fSCL
tLOW
tHIGH
tI
-
-
-
-
-
-
400
-
-
0.6
0.4
-
-
-
-
-
-
1000
kHz
μs
1.2
0.6
-
-
-
-
μs
50
0.9
50
0.9
ns
tAA
0.1
0.05
μs
tBUF
1.2
-
-
0.5
-
-
μs
tHD.STA
tSU.STA
tHD.DAT
tSU.DAT
tR
0.6
0.6
0
-
-
0.25
0.25
0
-
-
μs
μs
Start Setup Time
-
-
-
-
Data In Hold Time
-
-
-
-
-
-
μs
Data In Setup Time
100
-
-
100
-
-
ns
Inputs Rise TimeNOTE1
Inputs Fall TimeNOTE1
Stop Setup Time
-
-
0.3
300
-
-
-
0.3
300
-
μs
tF
-
-
ns
tSU.STO
tDH
0.6
50
-
-
0.25
50
-
-
μs
Data Out Hold Time
-
-
-
-
ns
Write Cycle Time
tWR
3.3
5
3.3
5
ms
Write
Cycles
5.0V, 25℃, Byte ModeNOTE1
Endurance
1M
-
-
-
-
-
NOTE1: This parameter is characterized and is not 100% tested.
NOTE2: AC measurement conditions: RL(connects to VCC): 1.3kΩ
Input pulse voltages: 0.3 VCC to 0.7VCC
Input rise and fall time: 50ns
Input and output timing reference voltages: 0.5VCC
The value of RL should be concerned according to the actual loading on the user’s system.
REV2.0
- MAY 2009 RELEASED, NOV 2016 UPDATED -
- 5 -
AITSEMI [ AiT Semiconductor ]
