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Rainbow Electronics BR24C21FV User Manual

Page 3

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BR24C21 / BR24C21F / BR24C21FJ / BR24C21FV

Memory ICs

!

!

!

!

Electrical characteristics (Unless otherwise noted, Ta=

−40∼85°C, V

CC

=2.5

∼5.5V)

Parameter

Symbol

Min.

Typ.

Max.

Unit

Conditions

V

IH1

V

V

IL1

0.3V

CC

V

V

OL

0.4

V

Input leakage current

I

LI

1

µ

A

SCL,

VCLK, V

IN

=

0V

~V

CC

Output leakage current

I

LO

1

1

1

µ

A

Operating current

I

CC

3.0

mA

Standby current

I

SB

10

100

µ

A

0.7V

CC

SCL, SDA

SCL, SDA

SDA, I

OL

=

3.0mA

V

CC

=

5.5V, f

SCL

=

400kHz

SDA, V

OUT

=

0V

~V

CC

"HIGH" input volatge1

"LOW" input volatge1

V

IH2

V

V

IL2

0.8

V

2.0

VCLK, V

CC

4.0V

VCLK

"HIGH" input volatge2

"LOW" input volatge2

V

IL3

0.2V

CC

V

VCLK, V

CC

<

4.0V

"LOW" input volatge3

"LOW" output volatge

V

CC

=

5.5V, SDA

=

SCL

=

V

CC

,

VCLK

=

GND

1

1 Transmit-Only Mode

After the power is on, the BR24C21, BR24C21F, BR24C21FJ and BR24C21FV are in Standby state without providing the clock on the VCLK pin.
After the VCLK pin is provided the clock, the device is switched from Standby to Transmit-Only Mode, and the operating current runs.

Bi-directional Mode

The BR24C21, BR24C21F, BR24C21FJ and BR24C21FV are in Standby state after each command is porformed.

!

!

!

!

Operating timing characteristics (Unless otherwise noted, Ta=

−40∼85°C, V

CC

=2.5

∼5.5V)

Parameter

Symbol

Fast-mode

Vcc

=

2.5~5.5V

Standard-mode

Vcc

=

2.5~5.5V

Unit

f

SCL

kHz

t

HIGH

Noise erase valid time (SCL and SDA)

t

I

µ

s

Data clock "HIGH" time

SCL frequency

µ

s

Data clock "LOW" time

t

LOW

µ

s

SDA/SCL rise time

t

R

µ

s

SDA/SCL fall time

t

F

µ

s

Start condition hold time

t

HD

: STA

µ

s

Start condition setup time

t

SU

: STA

µ

s

Input data hold time

t

HD

: DAT

ns

Input data setup time

t

SU

: DAT

ns

Output data delay time (SCL)

t

PD

µ

s

Stop condition setup time

t

SU

: STO

µ

s

Bus open time before start or transfer

t

BUF

µ

s

t

WR

Min.

0.6

1.3


0.6

0.6

0

100

0.6

1.3

Typ.












Max.

400

0.1

0.3

0.3




0.9


10

Min.

4.0

4.7


4.0

4.7

0

250

4.0

4.7

Typ.












Max.

100

t

VHIGH

VCLK

"HIGH" time

µ

s

0.6

4.0

0.1

1.0

0.3




3.5

Output data delay time (VCLK)

t

VPD

µ

s

1.0

2.0


10

ms

Internal write cycle time

Noise erase valid time (VCLK)

t

VI

µ

s

<

Transmit-Only Mode

>

VCLK

"LOW" time

t

VLOW

µ

s

Transmit-Only powerup time

t

VPU

µ

s

VCLK hold time

t

VHD

µ

s

VCLK setup time

t

VSU

µ

s

1.3

0

0.6

0

0.1

4.7

0

4.0

0

0.1

Mode transition time

t

VHZ

µ

s

0.5

1.0