AT24C21 datasheet(4/17 Pages) ATMEL

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AT24C21

0405I–SEEPR–7/03

Note:

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

Transmit-only Mode

Symbol

Parameter

2.5-volt

Units

Min

Max

TVAA

Output valid from VCLK

500

VHIGH

VCLK high-time

4.0

µs

VLOW

VCLK low-time

4.7

µs

VHZ

Mode transition time

500

TVPU

Transmit-only power-up time

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).

Symbol

Parameter

2.5-volt

Units

Min

Max

fSCL

Clock Frequency, SCL

100

kHz

tLOW

Clock Pulse Width Low

4.7

µs

HIGH

Clock Pulse Width High

4.0

µs

Noise Suppression Time

(1) (SDA and SCL pins)

tAA

Clock Low to Data Out Valid

0.1

3.5

µs

tBUF

Time the bus must be free before a new transmission can start

4.7

µs

tHD.STA

Start Hold Time

4.0

µs

tSU.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

tSU.STO

Stop Set-up Time

4.0

µs

tDH

Data Out Hold Time

100

Write Cycle Time

Endurance

(1)

5.0V, 25°C, Page Mode

Write Cycles

AT24C21 Datasheet(PDF) 4 Page - ATMEL Corporation

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