듀얼채널 PCA9515A I2C 버스 확장 리피터 모듈
(PCA9515A I2C Bus Repeater Breakout)
개요
- 본 제품은 듀얼채널 PCA9515A I2C 버스 확장 리피터 모듈입니다.
- I2C 버스를 확장시킬 때 사용할 수 있는 제품으로 듀얼 채널입니다.
특징
- Operating Temperature Range: -40 celsius~85 celsius
- Max Frequency: 400KHz
- Channel Width: 2
- 5V Tolerant I/O: yes
- -Dual Channel Bidirectional Buffer: This product contains two identical bidirectional open drain buffer circuits that extend I2C and similar bus systems without compromising system performance. -Active high enable (EN) input and internal pullup: The PCA9515A has an active-high enable (EN) input with an internal pullup, which allows the user to select when the repeater is active. This can be used To isolate a badly behaved slave on power-up reset. -Power-up control circuit: The device contains a power-up control circuit that sets an internal latch to prevent the output circuits from becoming active until VCC is at a valid level (VCC = 2.3 V). -Dual bus operation: The PCA9515A also can be used to run two buses: one at 5-V interface levels and the other at 3.3-V interface levels, or one at 400-kHz operating frequency and the other at 100-kHz operating If the two buses are operating at different frequencies, the 100-kHz bus must be isolated when the 400-kHz operation of the other bus is required. If the master is running at 400 kHz, the maximum system operating frequency may be less Than 400 kHz, because of the delays that are added by the repeater. -The output low levels for each internal buffer are approximately 0.5 V, but the input voltage of each internal buffer must be 70 mV or more below the output low level, when the output is driven low. This prevents a lockup condition from occurring when the input low condition is released.