24C21 datasheet(4/13 Pages) ATMEL

4 / 13 page

AT24C21

Note:

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

AC Characteristics

Applicable over recommended operating range from T

A = -40°C to +85°C, VCC = +2.5V to +5.5V CL = 1 TTL Gate and

100 pF (unless otherwise noted).

Symbol

Parameter

2.5-volt

Units

Min

Max

SCL

Clock Frequency, SCL

100

KHz

LOW

Clock Pulse Width Low

4.7

µs

HIGH

Clock Pulse Width High

4.0

µs

Noise Suppression Time(1)

(SDA and SCL pins)

Clock Low to Data Out Valid

0.1

3.5

µs

BUF

Time the bus must be free before a new

transmission can start

4.7

µs

HD.STA

Start Hold Time

4.0

µs

SU.STA

Start Set-up Time

4.7

µs

HD.DAT

Data In Hold Time

µs

SU.DAT

Data In Set-up Time

250

Inputs Rise Time(1)

1.0

µs

Inputs Fall Time(1)

300

SU.STO

Stop Set-up Time

4.0

µs

Data Out Hold Time

100

Write Cycle Time

Endurance(1)

5.0V, 25°C, Page Mode

Write Cycles

24C21 Datasheet(PDF) 4 Page - ATMEL Corporation

24C21 Datasheet(HTML) 4 Page - ATMEL Corporation

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