S-24C256C
www.ablic.com
www.ablicinc.com
© ABLIC Inc., 2010-2013
2-WIRE SERIAL E
2
PROM
Rev.2.0
_03_S
The S-24C256C is a 2-wire, low current consumption and wide range operation serial E
2
PROM. The S-24C256C has the
capacity of 256 K-bit, and the organization is 32768 words
8-bit. Page write and sequential read are available.
Features
Operating voltage range
Page write:
Sequential read
Operation frequency:
Read:
1.6 V to 5.5 V
Write:
1.7 V to 5.5 V
64 bytes / page
1.0 MHz (V
CC
= 2.5 V to 5.5 V)
400 kHz (V
CC
= 1.6 V to 2.5 V)
Write time:
5.0 ms max.
Noise suppression:
Schmitt trigger and noise filter on input pins (SCL, SDA)
Write protect function during the low power supply voltage
Endurance:
10
6
cycles / unit
*1
(Ta =
25°C)
Data retention:
100 years (Ta =
25°C)
Memory capacity:
256 K-bit
Write protect:
100%
Initial shipment data:
FFh
Lead-free (Sn 100%), halogen-free
*2
*1.
For each unit (unit: the 4 bytes with the same address of W14 to W2)
*2.
Refer to “
Product Name Structure”
for details.
Packages
8-Pin SOP (JEDEC)
8-Pin TSSOP
Caution
This product is intended to use in general electronic devices such as consumer electronics,
office equipment, and communications devices. Before using the product in medical equipment
or automobile equipment including car audio, keyless entry and engine control unit, contact to
ABLIC Inc. is indispensable.
1
2-WIRE SERIAL E
2
PROM
S-24C256C
Pin Configurations
1. 8-Pin SOP (JEDEC)
8-Pin SOP (JEDEC)
Top view
Pin No
Symbol
A0
A1
A2
GND
SDA
*1
SCL
*1
Table 1
Description
Rev.2.0
_03_S
1
2
3
4
8
7
6
5
Figure 1
S-24C256CI-J8T1U4
Slave address input
Slave address input
Slave address input
Ground
Serial data I/O
Serial clock input
Write protect input
7
WP
Connected to V
CC
:
Protection valid
Open or connected to GND: Protection invalid
8
VCC
Power supply
*1.
Do not use it in high impedance.
1
2
3
4
5
6
2. 8-Pin TSSOP
8-Pin TSSOP
Top view
Pin No
1
2
3
4
8
7
6
5
Table 2
Symbol
A0
A1
A2
GND
SDA
*1
SCL
*1
Description
Figure 2
S-24C256CI-T8T1U4
Slave address input
Slave address input
Slave address input
Ground
Serial data I/O
Serial clock input
Write protect input
7
WP
Connected to V
CC
:
Protection valid
Open or connected to GND: Protection invalid
8
VCC
Power supply
*1.
Do not use it in high impedance.
1
2
3
4
5
6
Remark
Refer to the “Package
drawings”
for the details.
2
Rev.2.0
_03_S
Block Diagram
2-WIRE SERIAL E
2
PROM
S-24C256C
WP
SCL
SDA
Start / Stop
Detector
Serial Clock
Controller
LOAD
Device Address
Comparator
COMP
LOAD INC
A2
A1
A0
R/W
Address
Counter
X Decoder
VCC
GND
Voltage Detector
High-Voltage Generator
Data Register
Memory Cell Array
Y Decoder
Selector
D
IN
D
OUT
Data Output
ACK Output
Controller
Figure 3
3
2-WIRE SERIAL E
2
PROM
S-24C256C
Absolute Maximum Ratings
Table 3
Rev.2.0
_03_S
Item
Symbol
Absolute Maximum Ratings
Unit
Power supply voltage
V
CC
0.3
to
6.5
V
Input voltage
V
IN
0.3
to
6.5
V
Output voltage
V
OUT
0.3
to
6.5
V
Operation ambient temperature
T
opr
40
to
85
°C
Storage temperature
T
stg
65
to
150
°C
Caution The absolute maximum ratings are rated values exceeding which the product could suffer
physical damage. These values must therefore not be exceeded under any conditions.
Recommended Operating Conditions
Table 4
Item
Power supply voltage
High level input voltage
Low level input voltage
Symbol
V
CC
V
IH
V
IL
Condition
Read Operation
Write Operation
V
CC
= 1.8 V to 5.5 V
V
CC
= 1.6 V to 1.8 V
V
CC
= 1.8 V to 5.5 V
V
CC
= 1.6 V to 1.8 V
Ta =
40°C
to
85°C
Min.
Max.
1.6
1.7
0.7
V
CC
0.8
V
CC
0.3
0.3
5.5
5.5
5.5
5.5
0.3
V
CC
0.2
V
CC
Unit
V
V
V
V
V
V
Pin Capacitance
Table 5
Item
Input capacitance
I/O capacitance
Symbol
C
IN
C
I / O
Condition
V
IN
= 0 V (SCL, A0, A1, A2, WP)
V
I / O
= 0 V (SDA)
(Ta =
25°C,
f = 1.0 MHz, V
CC
= 5.0 V)
Min.
Max.
Unit
10
pF
10
pF
Endurance
Table 6
Item
Symbol
Operation Ambient Temperature
Endurance
N
W
Ta =
25°C
*1.
For each unit (unit: the 4 bytes with the same address of W14 to W2)
Min.
10
6
Max.
Unit
cycles / unit
*1
Data Retention
Table 7
Item
Data retention
Symbol
Operation Ambient Temperature
Ta =
25°C
Min.
100
Max.
Unit
year
4
Rev.2.0
_03_S
DC Electrical Characteristics
Table 8
2-WIRE SERIAL E
2
PROM
S-24C256C
Item
Current consumption (READ)
Symbol
I
CC1
Condition
Ta =
40°C
to
85°C
V
CC
= 2.5 V to 5.5 V
V
CC
= 1.6 V to 2.5 V
f
SCL
= 1.0 MHz
f
SCL
= 400 kHz
Min.
Max.
Min.
Max.
2.0
1.5
Unit
mA
Table 9
Ta =
40°C
to
85°C
V
CC
= 2.5 V to 5.5 V
V
CC
= 1.7 V to 2.5 V
f
SCL
= 1.0 MHz
f
SCL
= 400 kHz
Min.
Max.
Min.
Max.
4.0
4.0
Item
Current consumption (WRITE)
Symbol
I
CC2
Condition
Unit
mA
Table 10
Ta =
40°C
to
85°C
Item
Symbol
Condition
V
IN
= V
CC
or GND
SCL, SDA,
V
IN
= GND to V
CC
A0, A1, A2
V
IN
> 0.7
V
CC
At standby mode
SDA
V
OUT
= GND to V
CC
WP
V
IN
< 0.3
V
CC
WP
V
IN
> 0.7
V
CC
WP
V
IN
= 0.3
V
CC
WP
V
IN
= 0.7
V
CC
I
OL
= 3.2 mA
I
OL
= 1.5 mA
I
OL
= 0.7 mA
V
CC
= 2.5 V to 5.5 V
Min.
Standby current consumption I
SB
Input leakage current 1
Input leakage current 2
Output leakage current
Input current 1
Input current 2
Input Impedance 1
Input Impedance 2
Low level output voltage
I
LI1
I
LI2
I
LO
I
IL
I
IH
Z
IL
Z
IH
V
OL
30
500
Max.
4.0
1.0
1.0
1.0
50.0
2.0
0.4
0.3
0.2
V
CC
= 1.6 V to 2.5 V
Min.
30
500
Max.
3.0
1.0
1.0
1.0
50.0
2.0
0.3
0.2
A
A
A
A
A
A
k
k
V
V
V
Unit
5
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