PCA9518DBQR Texas Instruments - Yeehing Electronics

5-channel bidirectional 3- to 3.6-V expandable 400-kHz I2C/SMBus buffer/hub

Pricing (USD)

Quantity	Unit Price
1 — 99	1.779
100 — 249	1.469
250 — 999	1.055
1,000 +	0.56

The above prices are for reference only.

Specifications

Manufacturer	Texas Instruments
Product Category	Interface - I/O Expanders
RoHS	Y
Number of I/Os	5 I/O
Maximum Clock Frequency	400 kHz
Operating Supply Voltage	3 V to 3.6 V
Minimum Operating Temperature	- 40 C
Maximum Operating Temperature	+ 85 C
Mounting Style	SMD/SMT
Package / Case	QSOP-20
Packaging	Reel
Features	Reset Pin
Series	PCA9518
Brand	Texas Instruments
Logic Family	PCA
Moisture Sensitive	Yes
Product Type	I/O Expanders
Factory Pack Quantity	2500
Subcategory	Interface ICs
Unit Weight	0.004437 oz

For more information, please refer to datasheet

Documents

PCA9518DBQR Datasheet

More Information

The PCA9518 is an expandable five-channel bidirectional buffer for I2C and SMBus applications. The I2C protocol requires a maximum bus capacitance of 400 pF, which is derived from the number of devices on the I2C bus and the bus length. The PCA9518 overcomes this restriction by separating and buffering the I2C data (SDA) and clock (SCL) lines into multiple groups of 400-pF segments. Any segment-to-segment transition sees only one repeater delay. Each PCA9518 can communicate with other PCA9518 hubs through a 4-wire inter-hub expansion bus. Using multiple PCA9518 parts, any width hub (in multiples of five) can be implemented using the expansion pins, with only one repeater delay and no functional degradation of the system performance.