AM24LC21 datasheet(4/13 Pages) ETC

4 / 13 page

AM24LC21

Dual Mode, 1K-bits (128 x 8) 2-Wire Serial EEPROM

(Preliminary)

Anachip Corp.

www.anachip.com.tw

Rev 0.0 Aug 10, 2002

4/13

AC Electrical Characteristics

Standard Mode

Vcc=4.5V~5.5V

Fast mode

Symbol

Parameter

Min

Max

Min

Max

Unit

Remarks

FCLK

Clock frequency

−

100

−

400

Khz

−

Clock high time

−

0.6

−

Clock low time

4.7

−

1.3

−

SDA and SCL rise

time

−

0.3

(Note1)

SDA and SCL fall

time

−

0.3

−

0.3

(Note1)

THD(ST)

Start condition hold

time

−

0.6

−

After this period the first

clock pulse is generated

TSU(ST)

Start

condition

setup time

4.7

−

0.6

−

Only relevant for

repeated start condition

THD(DI)

Data input hold time

−

(Note 2)

TSU(DI)

Data

input

setup

time

0.25

−

0.1

−

TSU(STP)

Stop

condition

setup time

−

0.6

−

TAA

Output valid from

clock

−

3.5

−

0.9

(Note 2)

TBUF

Bus free time

4.7

−

1.3

−

Time the bus must be

free before a new

transmission can start

TOF

Output fall time from

VIH(min) to VIL(max)

−

0.25

20+0.1CB

0.25

(Note 1), CB≤100pF

TSP

Input

filter

spike

suppression

(SDA

and SCL pins)

−

0.05

−

0.05

(Note 3)

TWR

Write cycle time

−

Byte or page mode

TVAA

Output valid from

VCLK

−

TVH

VCLK high time

−

0.6

−

TVL

VCLK low time

4.7

−

1.3

−

TVHZ

Mode transition time

−

0.5

−

0.5

−

TVPU

Transmit only power

up time

−

Endurance

−

cycles

0C, V

CC=5V, Block

mode (Note 4)

Note 1. Not 100% tested. CB=total capacitance of one bus line in pF.

Note 2. As a transmitter, the device must provide an internal minimum delay time to bridge the undefined region (minimum 300ns) of the

falling edge of SCL to avoid unitended generation of start or stop conditions

Note 3. The combined TSP and Vhys specifications are due to new schmitt trigger inputs which provide improved noise and spike

suppression. This eliminates the need for a Tl specification for standard operation.

Note 4. This parameter is not tested but ensured by characterization.

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