S-24C08C 데이터 시트보기 (PDF) - Unspecified

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S-24C08C

2-WIRE SERIAL E2PROM

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2-WIRE SERIAL E2PROM

S-24C08C (WLP PRODUCT)

Rev.1.0_01_H

 Using S-24C08C

1. Adding a pull-up resistor to SDA I/O pin and SCL input pin

In consideration of I2C-bus protocol function, the SDA I/O pins should be connected with a pull-up resistor.

The S-24C08C cannot transmit normally without using a pull-up resistor.

In case that the SCL input pin of the S-24C08C is connected to the Nch open drain output pin of the master device,

connect the SCL pin with a pull-up resistor. As well, in case the SCL input pin of the S-24C08C is connected to the tri-

state output pin of the master device, connect the SCL pin with a pull-up resistor in order not to set it in high

impedance. This prevents the S-24C08C from error caused by an uncertain output (high impedance) from the tri-state

pin when resetting the master device during the voltage drop.

2. Equivalent circuit of input and I/O pin

The SCL pin and the SDA pin do not have a built-in pull-down or pull-up resistor.

The WP and A2 pins has a built-in pull-down resistor. The SDA pin has an open-drain output.

The followings are equivalent circuits of the pins.

SCL

SDA

Figure 19 SCL Pin

Figure 20 SDA Pin

20

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