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CAT24C256 Datasheet(PDF) 3 Page - Catalyst Semiconductor

No. de Pieza. CAT24C256
Descripción  256-Kb I2C CMOS Serial EEPROM
Descarga  14 Pages
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Fabricante  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
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CAT24C256 Datasheet(HTML) 3 Page - Catalyst Semiconductor

 
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CAT24C256
3
Doc No. 04, Rev. D
© 2007 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
A.C. CHARACTERISTICS(1)
VCC = .8 V to 5.5 V, TA = -40°C to 85°C, unless otherwise specified.
Symbol
Parameter
1.8 V - 5.5 V
2.5 V - 5.5 V
units
Min
Max
Min
Max
FSCL
Clock Frequency
00
400
kHz
TI(2)
Noise Suppression Time Constant at
SCL, SDA Inputs
0.
0.
µs
tAA
SCL Low to SDA Data Out
3.5
0.9
µs
tBUF(2)
Time the Bus Must be Free Before a
New Transmission Can Start
4.7
.3
µs
tHD:STA
Start Condition Hold Time
4
0.6
µs
tLOW
Clock Low Period
4.7
.3
µs
tHIGH
Clock High Period
4
0.6
µs
tSU:STA
Start Condition Setup Time
4.7
0.6
µs
tHD:DAT
Data In Hold Time
0
0
µs
tSU:DAT
Data In Setup Time
0.25
0.
µs
tR(2)
SDA and SCL Rise Time

0.3
µs
tF(2)
SDA and SCL Fall Time
0.3
0.3
µs
tSU:STO
Stop Condition Setup Time
4
0.6
µs
tDH
Data Out Hold Time
0.
0.
µs
tWR
Write Cycle Time
5
5
ms
tPU(2), (3)
Power-up to Ready Mode


ms
notes:
() Test conditions according to “A.C. Test Conditions” table.
(2) Tested initially and after a design or process change that affects this parameter.
(3) tPU is the delay between the time VCC is stable and the device is ready to accept commands.
A.C. TEST COnDITIOnS
Input Levels
0.2 x VCC to 0.8 x VCC
Input Rise and Fall Times 50 ns
Input Reference Levels
0.3 x VCC, 0.7 x VCC
Output Reference Levels
0.5 x VCC
Output Load
Current Source: IOL = 3 mA (VCC 2.5 V); IOL =  mA (VCC < 2.5 V); CL = 00 pF


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