24C21 データシートの表示（PDF） - Atmel Corporation

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24C21

2-Wire Serial EEPROM 1K (128 x 8)

Atmel Corporation 

AC Characteristics

Applicable over recommended operating range from TA = -40°C to +85°C, VCC = +2.5V to +5.5V CL = 1 TTL Gate and

100 pF (unless otherwise noted).

2.5-volt

Symbol

Parameter

Min

Max

Units

fSCL

tLOW

tHIGH

tI

Clock Frequency, SCL

Clock Pulse Width Low

Clock Pulse Width High

Noise Suppression Time(1)

(SDA and SCL pins)

0

100

KHz

4.7

µs

4.0

µs

NA

ns

tAA

Clock Low to Data Out Valid

tBUF

Time the bus must be free before a new

transmission can start

0.1

3.5

µs

4.7

µs

tHD.STA

Start Hold Time

4.0

tSU.STA

Start Set-up Time

4.7

tHD.DAT

Data In Hold Time

0

tSU.DAT

Data In Set-up Time

250

tR

Inputs Rise Time(1)

tF

Inputs Fall Time(1)

tSU.STO

Stop Set-up Time

4.0

tDH

Data Out Hold Time

100

tWR

Write Cycle Time

Endurance(1)

5.0V, 25°C, Page Mode

1M

Note: 1. This parameter is characterized and is not 100% tested.

µs

µs

µs

ns

1.0

µs

300

ns

µs

ns

10

ms

Write Cycles

4

AT24C21

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