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S-24C04DI-J8T1U5 Datasheet(PDF) 10 Page - Seiko Instruments Inc |
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S-24C04DI-J8T1U5 Datasheet(HTML) 10 Page - Seiko Instruments Inc |
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10 / 47 page  2-WIRE SERIAL E2PROM S-24C02D/04D/08D16D Rev.3.0_01_U 10 Pin Functions 1. VCC (Power supply) pin The VCC pin is used to apply positive supply voltage. Regarding the applied voltage value, refer to " Recommended Operating Conditions". Set a bypass capacitor of about 0.1 μF between the VCC pin and the GND pin to make the power supply voltage stable. 2. A0, A1 and A2 (Slave address input) pins In the S-24C02D, to set the slave address, connect each of A0 pin, A1 pin and A2 pin to the GND pin or the VCC pin. Therefore the users can set 8 types of slave address by a combination of A0, A1, A2 pins. In the S-24C04D, to set the slave address, connect each of A1 pin and A2 pin to the GND pin or the VCC pin. Therefore the users can set 4 types of slave address by a combination of A1, A2 pins. In the S-24C08D, to set the slave address, connect A2 pin to the GND pin or the VCC pin. Therefore the users can set 2 types of slave address. In the S-24C16D, the slave address can not be assigned. Comparing the slave address transmitted from the master device and one that you set, makes possible to select one slave address from other devices connected onto the bus. Each of A0 pin, A1 pin and A2 pin has a built-in pull-down resistor. In open, the pin is set to the same status as it connected to the GND pin. In the case of the products with SOT-23-5, set the slave address transmitting from the master device to "0". 3. SDA (Serial data I/O) 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 VCC by a resistor. Figure 4 shows the relation with an output load. 4. 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. 5. WP (Write protect input) pin The write protect is enabled by connecting the WP pin to VCC. When not using the write protect, connect this pin to the GND pin or set in open. Maximum value of pull-up resistor [k Ω] 10 0 2 4 6 8 10 12 14 16 18 20 100 200 fSCL= 400 kHz fSCL= 1000 kHz Value of load capacity [pF] Figure 4 Output Load |
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