ROHM BR24C02FV-W, BR24C02FJ-W, BR24C02F-W, BR24C02-W, BR24C01AFV-W Datasheet

BR24C01A-W / BR24C01AF-W / BR24C01AFJ-W / BR24C01AFV-W / BR24C02-W / BR24C02F-W /

Memory ICs

BR24C02FJ-W / BR24C02FV-W / BR24C04-W / BR24C04F-W / BR24C04FJ-W / BR24C04FV-W

I2C BUS compatible serial EEPROM

BR24C01A-W / BR24C01AF-W / BR24C01AFJ-W /
BR24C01AFV-W / BR24C02-W / BR24C02F-W /
BR24C02FJ-W / BR24C02FV-W / BR24C04-W /
BR24C04F-W / BR24C04FJ-W / BR24C04FV-W

The BR24C01A-W, BR24C02-W, and BR24C04-W series are 2-wire (I2C BUS type) serial EEPROMs which are
electrically programmable.

∗ I2C BUS is a registered trademark of Philips.

!!!!

Applications

VCRs, TVs, printers, car stereos, cordless telephones, short wave radios, programmable DIP switches

!!!!

Features

1) 128×8bits (1k) serial EEPROM.

6) Page write function.
(BR24C01A-W / AF-W / AFJ-W / AFV-W)
256×8bits (2k) serial EEPROM.
(BR24C02-W / F-W / FJ-W / FV-W)
512×8bits (4k) serial EEPROM.

7) DATA security
(BR24C04-W / F-W / FJ-W / FV-W)

2) Two wire serial interface.

3) Operating voltage range : 2.7V∼5.5V

4) Low current consumption

8) Noise filters at SCL and SDA pins.

9) Address can be incremented automatically during
Active (at 5V) : 1.5mA (Typ.)
Standby (at 5V) : 0.1µA (Typ.)

5) Auto erase and auto complete functions can be used
during write operations.

10) Compact packages.

11) Rewriting possible up to 100,000 times

12) Data can be stored for ten years without corruption.

!!!!Absolute maximum ratings (Ta = 25°C)

Parameter Symbol Limits Unit

V

Applied voltage −0.3

Power dissipation

Storage temperature −65
Operating temperature °C
Input voltage

∗1 Reduced by 3.0mW for each increase in Ta of 1°C over 25°C.
∗2 Reduced by 4.5mW for each increase in Ta of 1°C over 25°C.
∗3 Reduced by 8.0mW for each increase in Ta of 1°C over 25°C.

CC

Pd

Tstg
Topr

−

300(SSOP−B8)
450(SOP8, SOP−J8)
800(DIP8)

~+6.5 V

~+125 °C

~+85

−40

−0.3~VCC+0.3

∗1
∗2
∗3

BR24C01A-W / AF-W / AFJ-W / AFV-W : 8 bytes
BR24C02-W / F-W / FJ-W / FV-W : 8 bytes
BR24C04-W / F-W / FJ-W / FV-W : 16 bytes

Write protect feature
Inhibit to WRITE at low V

CC

read operations.

mW

V

BR24C01A-W / BR24C01AF-W / BR24C01AFJ-W / BR24C01AFV-W / BR24C02-W / BR24C02F-W /

Memory ICs

BR24C02FJ-W / BR24C02FV-W / BR24C04-W / BR24C04F-W / BR24C04FJ-W / BR24C04FV-W

!!!!Recommended operating conditions (Ta = 25°C)

Parameter Symbol Limits Unit

Power supply voltage

Input voltage V

CC

V

IN

2.7~5.5 (WRITE)

2.7

~

5.5 (READ)
0~V

!!!!Block diagram

BR24C01A-W / AF-W / AFJ-W / AFV-W

7bits

7bits

START STOP

CONTROL LOGIC

1kbits EEPROM ARRAY

SLAVE WORD

·

ADDRESS REGISTER

VCC LEVEL DETECT

ACK

8bits

DATA

REGISTER

GND

A0

A1

A2

1

2

3

4

ADDRESS
DECODER

HIGH VOLTAGE GEN.

V
V

CC

V

!!!!Pin descriptions

Pin name Function

CC

V

8

7

WP

SCL

6

SDA

5

A0, A1, A2 Slave address setting pin

SCL Serial data clock
SDA Serial data input / output

WP Write protect pin

CC

V

Power supply

GND Ground

∗ An open drain output requires a pull-up resistor.

∗

BR24C02-W / F-W / FJ-W / FV-W

8bits

8bits

START STOP

CONTROL LOGIC

2kbits EEPROM ARRAY

ADDRESS REGISTER

GND

A0

A1

A2

1

2

3

4

ADDRESS
DECODER

HIGH VOLTAGE GEN.

BR24C04-W / F-W / FJ-W / FV-W

9bits

9bits

START STOP

CONTROL LOGIC

4kbits EEPROM ARRAY

ADDRESS REGISTER

A0

A1

A2

1

2

ADDRESS
DECODER

3

SLAVE WORD

·

VCC LEVEL DETECT

SLAVE WORD

·

ACK

ACK

8bits

DATA

REGISTER

8bits

DATA

REGISTER

Pin name Function

CC

V

8

A0, A1, A2

SCL

SDA

Slave address setting pin
Serial data clock
Serial data input / output

∗

WP Write protect pin

7

WP

CC

V

Power supply

GND Ground

∗ An open drain output requires a pull-up resistor.

SCL

6

SDA

5

Pin name

Function

A0 N.C.

CC

V

8

7

WP

A1, A2 Slave address setting pin

SCL

SDA

Serial data clock

Serial data input / output
WP Write protect pin
V

CC

Power supply

∗

GND Ground

SCL

6

∗ An open drain output requires a pull-up resistor.

GND

4

HIGH VOLTAGE GEN.

VCC LEVEL DETECT

SDA

5

BR24C01A-W / BR24C01AF-W / BR24C01AFJ-W / BR24C01AFV-W / BR24C02-W / BR24C02F-W /

Memory ICs

BR24C02FJ-W / BR24C02FV-W / BR24C04-W / BR24C04F-W / BR24C04FJ-W / BR24C04FV-W

!!!!Electrical characteristics

DC characteristics (unless otherwise noted, Ta = −40 to + 85 °C, V

Parameter Symbol Min. Typ. Max. Unit Conditions

0.7V

Input high level voltage
Input low level voltage
Output low level coltage
Input leakage current I
Output leakage current I
operatingcurrent dissipation I

Standby current I

Not designed for radiation resistance.

IH

V
V

IL

V

OL

LI

LO

CC

SB

CC

−−

−−

−−

−1

−

−1 −

−

−

−

−

0.3V

= 2.7 to 5.5V)

CC

V

CC

V

0.4 V
1 µA
1 µA

2.0 mA

2.0 µA

OL

=3.0mA(SDA)

I
VIN=0V~V
V
V
V

CC

OUT

=0V~V

CC

CC

=5.5V, f

SCL

=400kHz

CC

=5.5V, SDA·SCL=V

A0, A1, A2=GND, WP=GND

Operating timing characteristics (unless otherwise noted, Ta = −40 to + 85 °C, VCC = 2.7 to 5.5V)

Parameter Symbol

SCL frequency
Data clock HIGH time
Data clock LOW time t

SDA / SCL rise time t
SDA / SCL fall time t
Start condition hold time t
Start condition setup time t
Input data hold time t
Input data setup time t

HD

SU

HD

SU

Output data delay time t
Output data hold time t
Stop condition setup time t

SU

Bus open time before start of transfer t

Noise erase valid time (SCL / SDA pins) t

f

SCL

t

HIGH

LOW

R

F

: STA
: STA
: DAT ns
: DAT ns

PD

DH

: STO

BUF

WR

t

I

Vcc=5V±10% Vcc=3V±10%

Min.

−

0.6

1.2

−

−

0.6

0.6
0

100

0.1

0.1

0.6

1.2

−

−

Typ.

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

Max.

400

−

−

0.3

0.3

−

−

−

−

0.9

−

−

−

10

0.05

Min.

−

4.0

4.7

−

−

4.0

4.7
0

250

0.2

0.2

4.7

4.7

−

−

Typ.

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

Max.

100

−

−

1.0

0.3

−

−

−

−

3.5

−

−

−

10 msInternal write cycle time

0.1

−

−

CC

Unit

kHz

µs
µs
µs
µs
µs
µs

µs
µs
µs
µs

µs

BR24C01A-W / BR24C01AF-W / BR24C01AFJ-W / BR24C01AFV-W / BR24C02-W / BR24C02F-W /

Memory ICs

!!!!Timing charts

SCL

SDA

(input)

SDA

(output)

SCL

SDA

BR24C02FJ-W / BR24C02FV-W / BR24C04-W / BR24C04F-W / BR24C04FJ-W / BR24C04FV-W

t

HIGH

t

DH

tSU : STOtHD : STA tSU : STA

tHD :

t

BUF

STA

t

t

R

tSU : DAT tHD : DAT

START BIT STOP BIT

F

t

LOW

t

PD

· Data is read on the rising edge of SCL.

· Data is output in synchronization with the falling edge of SCL.

Fig.1 Synchronized data input / output timing

SCL

ACKD0

Fig.2 Write cycle timing

WR

t

Start conditionStop condition

!!!!

Circuit operation

SDA

Write data

(n address)

(1) Start condition (recognition of start bit)

Before executing any command, when SCL is HIGH, a start condition (start bit) is required to cause SDA to fall from
HIGH to LOW. This IC is designed to constantly detect whether there is a start condition (start bit) for the SDA and
SCL line, and no commands will be executed unless this condition is satisfied.
(See Fig.1 for the synchronized data input / output timing.)

(2) Stop condition (recognition of stop bit)

To stop any command, a stop condition (stop bit) is required. A stop condition is achieved when SDA goes from
LOW to HIGH while SCL is HIGH. This enables commands to be completed.
(See Fig.1 for the synchronized data input / output timing.)

(3) Precautions concerning write commands

In the WRITE mode, the transferred data is not written to the memory unless the stop bit is executed.