BR24L04F-WE2 Rohm Semiconductor, BR24L04F-WE2 Datasheet - Page 12

IC EEPROM 4KBIT 400KHZ 8SOP

BR24L04F-WE2

Manufacturer Part Number
BR24L04F-WE2
Description
IC EEPROM 4KBIT 400KHZ 8SOP
Manufacturer
Rohm Semiconductor
Datasheets

Specifications of BR24L04F-WE2

Memory Size
4K (512 x 8)
Format - Memory
EEPROMs - Serial
Memory Type
EEPROM
Speed
400kHz
Interface
I²C, 2-Wire Serial
Voltage - Supply
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Package / Case
8-SOP
Clock Frequency
400kHz
Supply Voltage Range
1.8V To 5.5V
Memory Case Style
SOP
No. Of Pins
8
Operating Temperature Range
-40°C To +85°C
Svhc
No SVHC (18-Jun-2010)
Package /
RoHS Compliant
Organization
512 K x 8
Interface Type
I2C
Maximum Clock Frequency
0.4 MHz
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1.8 V
Maximum Operating Current
2 mA
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
1.8 V, 5.5 V
Memory Configuration
512 X 8
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
BR24L04F-WE2
BR24L04F-WE2TR

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I/O peripheral circuit
A0, A1, A2, WP process
Pull up resistance of SDA terminal
SDA is NMOS open drain, so requires pull up resistance. As for this resistance value (R
value from microcontroller V
the larger the consumption current at action.
Maximum value of R
The maximum value of R
Minimum value of Rpu
The minimum value of Rpu is determined by the following factors.
Pull up resistance of SCL terminal
When SCL control is made at CMOS output port, there is no need, but in the case there is timing where SCL becomes "Hi-Z", add a pull up
resistance. As for the pull up resistance, one of several k
output port of microcontroller.
Process of device address terminals (A0, A1, A2)
Check whether the set device address coincides with device address input sent from the master side or not, and select one among
plural devices connected to a same bus. Connect this terminal to pull up or pull down, or Vcc or GND. And, pins (N, C, PIN) not
used as device address may be set to any of "H", "L", and "Hi-Z".
Process of WP terminal
WP terminal is the terminal that prohibits and permits write in hardware manner. In "H" status, only READ is available and WRITE of all
addresses is prohibited. In the case of "L", both are available. In the case to use it as an ROM, it is recommended to connect it to pull
up or Vcc. In the case to use both READ and WRITE, control WP terminal or connect it to pull down or GND.
(1) SDA rise time to be determined by the capacity (CBUS) of bus line of R
(2) The bus electric potential A to be determined by input leak total (I
(1) When IC outputs LOW, it should be satisfied that V
(2) V
And AC timing should be satisfied even when SDA rise time is late.
R
PU
OLMAX
Ex.) When V
Types with N.C. PIN
should sufficiently secure the input "H" level (V
V
Ex.) When V
V
CC
= 0.4V should secure the input "L" level (V
OLMAX
R
V
-
I
PU
L
CC -
R
R
Therefore, the condition (2) is satisfied.
= 0.8V
PU
From (1),
And
PU
≤ V
V
PU
- 0.2V
CC
from ( 2 )
OL
R
IL
CC
PU
IL
CC
= 3V, V
- 0.1V
PU
≤ I
= 3V, I
-
CC
V
300 [ k ]
0.8
OL
IL
IH
≥V
is determined by the following factors.
, I
10 × 10
×
IH
CC
L
L
3–0.7
OL
, and V
= 10µA, V
= 0.4V, I
–6
×
BR24L16/F/FJ/FV/FVT/FVM/FVJ-W  A0、A1、A2
BR24L08/F/FJ/FV/FVT/FVM/FVJ-W  A0、A1
BR24L04/F/FJ/FV/FVT/FVM/FVJ-W  A0
3
R
OL
PU
IH
- I
V
V
R
OL
= 0.7V
OL
OL
IL
PU
V
=0.3 × 3
= 3mA, microcontroller, EEPROM V
≥867 [ ]
=0.4 [ V ]
=0.9 [ V ]
characteristics of this IC. If R
CC -
I
3 – 0.4
3 ×10
OL
CC
,
V
OL
–3
IH
IL
OLMAX
) of microcontroller and EEPROM including recommended noise margin 0.1V
) of microcontroller and EEPROM including recommended noise margin 0.2V
~ several ten k
12/16
Microcontroller
= 0.4V and I
Fig.52 I/O circuit diagram
IL
L
) of device connected to bus at output of "H" to SDA bus and
OLMAX
PU
PU
Bus line
capacity CBUS
R
is recommended in consideration of drive performance of
PU
is large, action frequency is limited. The smaller the R
and SDA should be tR or below.
A
IL
IL
= 3mA.
= 0.3V
BR24LXX
PU
SDA terminal
), select an appropriate value to this resistance
CC
PU
CC
CC
,
.
.

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