S-24C08C Datasheet, PDF (8/33 Pages) Seiko Instruments Inc – Write protect function during the low power supply voltage

2-WIRE SERIAL E²PROM
S-24C08C (WLP PRODUCT)
Rev.1.0_00_H
 Pin Functions
1. A2 (Slave address input) pin
The slave address is assigned by connecting the A2 pin to the GND or to the V_CC respectively. The two different slave
address can be assigned to the S-24C08C by A2 pin.
The given slave address, which is compared with the slave address transmitted from the master device, is used to
select the one among the multiple devices connected to the bus.
The A2 pin has a pull-down resistor. In open, this pin is set to the same status as it is connected to GND.
2. SDA (Serial data input / output) pin
The SDA pin is used for the bi-directional transmission of serial data. This pin is a signal input pin, and an Nch open
drain output pin.
In use, generally, connect the SDA line to any other device which has the open-drain or open-collector output with
Wired-OR connection by pulling up to V_CC by a resistor (Figure 6 shows the relation with an output load).
3. SCL (Serial clock input) pin
The SCL pin is used for the serial clock input. Since the signals are processed at a rising or falling edge of the SCL
clock, pay attention to the rising and falling time and comply with the specification.
4. WP (Write protect input) pin
The write protect is enabled by connecting the WP pin to V_CC. When not using the write protect, connect this pin to
GND or set in open.
20
18
16
14
Maximum value of pull-up resistor 12
[kΩ]
10
8
6
4
2
0
10
f_SCL = 400 kHz
100
Value of load capacity
[pF]
Figure 6 Output Load
 Initial Delivery Data
Initial delivery data of all addresses is “FFh”.
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