DataSheetWiki


PCA9522 fiches techniques PDF

NXP Semiconductors - Fast dual bidirectional bus buffer

Numéro de référence PCA9522
Description Fast dual bidirectional bus buffer
Fabricant NXP Semiconductors 
Logo NXP Semiconductors 





1 Page

No Preview Available !





PCA9522 fiche technique
PCA9522
Fast dual bidirectional bus buffer with hot insertion logic
Rev. 1 — 28 September 2011
Product data sheet
1. General description
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 for the IES5502, with only the maximum bus voltage reduced from 15 V to
10 V.
Hot insertion logic allows the IC to be plugged into live backplanes without causing data
corruption on the bus. The open-collector ready signal (RDY) indicates when the
connection has been made. Precharging of the backplane ports minimizes disruptions to
the bus during hot insertion.
The enable function allows sections of the bus to be isolated. Individual parts of the
system can be brought on-line successively. Bus level translation between a very wide
range of bus voltages, from 1.8 V to 10 V, is supported. These features provide enormous
flexibility in interfacing systems of different technologies, operating speeds and loads.
The unique operation of the PCA9522 provides one of the fastest response times of such
bidirectional buffers. It does this without the need for rise-time accelerators which,
combined with low noise margins, may cause glitches outside of the I2C-bus specification.
2. Features and benefits
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
Supports the connection of several buffers in series
Level shift bus voltages from 1.8 V to 10 V

PagesPages 20
Télécharger [ PCA9522 ]


Fiche technique recommandé

No Description détaillée Fabricant
PCA9521 Fast dual bidirectional bus buffer NXP Semiconductors
NXP Semiconductors
PCA9522 Fast dual bidirectional bus buffer NXP Semiconductors
NXP Semiconductors
PCA9525 Simple 2-wire bus buffer NXP Semiconductors
NXP Semiconductors
PCA9527 3-channel bidirectional bus extender NXP Semiconductors
NXP Semiconductors

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche