S-24C01A Seiko Instruments Inc, S-24C01A Datasheet - Page 6

• Manufacturer Part Number: S-24C01A
• Description: CMOS 2-WIRE SERIAL EEPROM
• Manufacturer: Seiko Instruments Inc

CMOS 2-WIRED SERIAL EEPROM
S-24C01A/02A/04A
6
SDA
SCL
Pin Functions
1. Address Input Pins (A0, A1, and A2)
2. SDA (Serial Data Input/Output) Pin
3. SCL (Serial Clock Input) Pin
4. TEST/WP Pin
Connect pins A0, A1, and A2 to the GND or the V
different ways to assign slave addresses in the S-24C01A and S-24C02A through a combination of pins
A0, A1, and A2, and 4 ways to assign them in the S-24C04A through a combination of pins A1 and A2.
When the input slave address coincides with the slave address transmitted from the master device, 1
device can be selected from among multiple devices connected to the bus. Always connect the address
input pin to GND or V
The SDA pin is used for bilateral transmission of serial data. It consists of a signal input pin and an Nch
open-drain transistor output pin.
Usually pull up the SDA line via resistance to the V
output devices connected in a wired OR configuration.
The SCL pin is used for serial clock input. It is capable of processing signals at the rising and falling edges
of the SCL clock input signal. Make sure the rising time and falling time conform to the specifications.
The S-24C01A does not have a write protection (WP) function. The pin serves as a TEST pin and shoud
always be connect to the GND.
In the S-24C02A and S-24C04A, this pin is used for write protection. When there is no need for write
protection, connect the pin to the GND; when there is a need for write protection, connect the pin to the
Vcc.
Write time
Item
Write data
Symbol
D0
t
WR
CC
and leave it unchanged.
Acknowledge
Min.
—
V
CC
=4.5 to 5.5V
Seiko Instruments Inc.
Figure 5 Write Cycle
Typ.
0.8
Stop
condition
Table 10
Max.
CC
1.0
, respectively, to assign slave addresses. There are 8
CC
, and use it with other open-drain or open-collector
t
WR
Min.
—
V
Start
condition
CC
=2.5 to 4.5V
Typ.
4.0
Max.
5.0
Rev. 2.2
Unit
ms
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