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PCA9555 Datasheet(PDF) 11 Page - NXP Semiconductors |
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PCA9555 Datasheet(HTML) 11 Page - NXP Semiconductors |
11 / 22 page Philips Semiconductors Product data sheet PCA9555 16-bit I2C and SMBus I/O port with interrupt 2004 Sep 30 11 TYPICAL APPLICATION SW02284 I/O0.0 I/O0.1 I/O0.2 I/O0.3 I/O0.4 I/O0.5 VDD VDD SCL SDA INT RESET MASTER CONTROLLER GND SCL SDA PCA9555 A1 A0 VSS VDD SUBSYSTEM 3 (e.g. alarm system) SUBSYSTEM 2 (e.g. counter) SUBSYSTEM 1 (e.g. temp sensor) INT VDD ALARM Controlled Switch (e.g. CBT device) ENABLE 10 k Ω 10 k Ω 10 k Ω 2 k Ω NOTE: Device address configured as 1110100 for this example I/O0.0, I/O0.2, I/O0.3, configured as outputs I/O0.1, I/O0.4, I/O0.5, configured as inputs I/O0.6, I/O0.7, and I/O1.0 to I/O1.7 configured as inputs A B INT I/O0.6 I/O0.7 I/O1.0 I/O1.1 I/O1.2 I/O1.3 I/O1.4 I/O1.5 I/O1.6 I/O1.7 10 DIGIT NUMERIC KEYPAD Figure 11. Typical application. |
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