The PCA9522 is a monolithic bipolar integrated circuit for bus buffering in applications including I2C-bus, SMBus, etc. It includes hot insertion logic for detecting stop and idle conditions, making it ideal for live insertion into backplanes. The buffer extends the bus load limit by buffering both the SCL and SDA lines. The PCA9522 is a drop-in replacement .
Dual, bidirectional unity gain isolating buffer
Hot insertion logic prevents data and clock bus corruption for live backplane
applications
Pre-charge minimizes data corruption on live insertion
Supports I2C-bus (Standard-mode and Fast-mode), SMBus (standard and high power
modes) and PMBus
Open-collector ready output (RDY)
Fast switching times allow operation in excess of 1 MHz
Enable (EN) allows bus segments to be disconnected
Low current standby mode when not enabled
High-impedance ports when IC unpowered
6 mA (static) pull-down capability
Low noise susceptibility
Supp.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | PCA9521 |
NXP Semiconductors |
Fast dual bidirectional bus buffer | |
2 | PCA9525 |
NXP Semiconductors |
Simple 2-wire bus buffer | |
3 | PCA9527 |
NXP Semiconductors |
3-channel bidirectional bus extender | |
4 | PCA9500 |
NXP |
8-bit I2C and SMBus I/O port | |
5 | PCA9501 |
NXP |
8-bit I2C and SMBus I/O port | |
6 | PCA9502 |
NXP Semiconductors |
8-bit I/O expander | |
7 | PCA9504A |
NXP |
Glue chip 4 | |
8 | PCA9505 |
NXP |
40-bit I2C-bus I/O port | |
9 | PCA9506 |
NXP Semiconductors |
40-bit I2C-bus I/O port | |
10 | PCA9507 |
NXP Semiconductors |
2-wire serial bus extender | |
11 | PCA9508 |
NXP |
Hot swappable level translating I2C-bus repeater | |
12 | PCA9509 |
NXP |
Level translating I2C-bus/SMBus repeater |