PCA9511A Datasheet, PDF (1/17 Pages) NXP Semiconductors – Hot swappable I2C-bus and SMBus bus buffer

PCA9511A
Hot Swappable I²C-Bus and
SMBus Bus Buffer
The PCA9511A is a hot swappable I²C−bus and SMBus buffer that
allows I/O card insertion into a live backplane without corrupting the
data and clock buses. Control circuitry prevents the backplane from
being connected to the card until a stop command or bus idle occurs on
the backplane without bus contention on the card. When the
connection is made, the PCA9511A provides bidirectional buffering,
keeping the backplane and card capacitances isolated.
The PCA9511A rise time accelerator circuitry allows the use of
weaker DC pull−up currents while still meeting rise time
requirements. The PCA9511A incorporates a digital ENABLE input
pin, which enables the device when asserted HIGH and forces the
device into a low current mode when asserted LOW, and an
open−drain READY output pin, which indicates that the backplane
and card sides are connected together (HIGH) or not (LOW).
During insertion, the PCA9511A SDA and SCL lines are
precharged to 1 V to minimize the current required to charge the
parasitic capacitance of the chip.
Features
• Bidirectional Buffer for SDA and SCL Lines Increases Fan−Out and
Prevents SDA and SCL Corruption During Live Board Insertion and
Removal from Multipoint Backplane Systems
• DV/Dt Rise Time Accelerators on all SDA and SCL lines
• Active HIGH ENABLE Input
• Active HIGH READY Open−Drain Output
• High−Impedance SDA and SCL for V_CC = 0 V
• 1 V precharge on all SDA and SCL Lines
• Supports Clock Stretching and Multiple Master
arbitration/Synchronization
• V_CC Operating Range: 2.7 V to 5.5 V
• I²C and SMBus SCL Clock Frequency up to 1 MHz
• Alternate Features for
PCA9510A/PCA9512A/PCA9513A/PCA9514A
• Available in: Micro8, SOIC−8
• ESD Performance: 8000 V HBM, 600 V MM, 2000V CDM
• These are Pb−Free Devices
Applications
• cPCI, VME, AdvancedTCA cards and other multipoint backplane
cards that are required to be inserted or removed from an operating
system
http://onsemi.com
MARKING
DIAGRAMS
Micro8]
DM SUFFIX
CASE 846A
8
9511
AYWG
G
1
8
1
SOIC−8
CASE 751
8
9511
AYWW
G
1
A = Assembly Location
L = Wafer Lot
M = Date Code
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information on page 15 of
this data sheet.
© Semiconductor Components Industries, LLC, 2013
1
August, 2013 − Rev. 0
Publication Order Number:
PCA9511A/D