pca9511a NXP Semiconductors, pca9511a Datasheet
pca9511a
Manufacturer Part Number
pca9511a
Description
Hot Swappable I2c-bus And Smbus Bus Buffer
Manufacturer
NXP Semiconductors
Datasheet
1.PCA9511A.pdf
(23 pages)
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1. General description
2. Features
3. Applications
The PCA9511A is a hot swappable I
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.
PCA9511A
Hot swappable I
Rev. 01 — 15 August 2005
Bidirectional buffer for SDA and SCL lines increases fan out and prevents SDA and
SCL corruption during live board insertion and removal from multi-point backplane
systems
Compatible with I
Built-in V t rise time accelerators on all SDA and SCL lines (0.6 V threshold)
Active HIGH ENABLE input
Active HIGH READY open-drain output
High-impedance SDA and SCL pins for V
1 V precharge on all SDA and SCL lines
Supporting clock stretching and multiple master arbitration/synchronization
Operating power supply voltage range: 2.7 V to 5.5 V
0 kHz to 400 kHz clock frequency
ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per
JESD22-A115, and 1000 V CDM per JESD22-C101
Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
Packages offered: SO8, TSSOP8 (MSOP8)
cPCI, VME, AdvancedTCA cards and other multi-point backplane cards that are
required to be inserted or removed from an operating system
2
C-bus standard mode, I
2
C-bus and SMBus bus buffer
2
C-bus and SMBus buffer that allows I/O card
CC
2
C-bus fast mode, and SMBus standards
= 0 V
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