PCA9514AD NXP Semiconductors, PCA9514AD Datasheet - Page 10

• Manufacturer Part Number: PCA9514AD
• Description: Hot Swappable I2C Bus and SMBus Bus Buffer 8-Pin SO Tube
• Manufacturer: NXP Semiconductors

Specifications of PCA9514AD

• Package: 8SO
• Operating Temperature: -40 to 85 °C

NXP Semiconductors
PCA9513A_PCA9514A_4
Product data sheet
Fig 8.
BD_SEL
SDA
SCL
V
CC
10 k
Remark: The PCA9514A can be used in any combination depending on the number of rise time accelerators that are needed
by the system. Normally only one PCA9514A would be required per bus.
Hot swapping multiple I/O cards into a backplane using the PCA9514A in a cPCI, VME, and AdvancedTCA
system
BACKPLANE
R1
8.9 Hot swapping and capacitance buffering application
R2
10 k
CONNECTOR
Figure 8
applications that take advantage of both its hot swapping and capacitance buffering
features. In all of these applications, note that if the I/O cards were plugged directly into
the backplane, all of the backplane and card capacitances would add directly together,
making rise and fall time requirements difficult to meet. Placing a bus buffer on the edge of
each card, however, isolates the card capacitance from the backplane. For a given I/O
card, the PCA9513A and PCA9514A drive the capacitance of everything on the card, and
the backplane must drive only the capacitance of the bus buffer, which is less than 10 pF,
the connector, trace, and all additional cards on the backplane.
See Application Note AN10160, ‘Hot Swap Bus Buffer’ for more information on
applications and technical assistance.
BACKPLANE
through
Figure 11
Rev. 04 — 18 August 2009
illustrate the usage of the PCA9513A and PCA9514A in
POWER SUPPLY
POWER SUPPLY
POWER SUPPLY
HOT SWAP
HOT SWAP
HOT SWAP
ENABLE
SDAIN
SCLIN
ENABLE
SDAIN
SCLIN
ENABLE
SDAIN
SCLIN
Hot swappable I
PCA9513A; PCA9514A
R3
10 k
R7
10 k
R11
10 k
I/O PERIPHERAL CARD N
I/O PERIPHERAL CARD 1
I/O PERIPHERAL CARD 2
GND
GND
GND
V
V
V
CC
CC
CC
SDAOUT
SCLOUT
SDAOUT
SCLOUT
SDAOUT
SCLOUT
READY
READY
READY
C1
0.01 F
C3
0.01 F
C5
0.01 F
2
C-bus and SMBus bus buffer
R4
10 k
R8
10 k
R12
10 k
R5
10 k
R9
10 k
R13
10 k
© NXP B.V. 2009. All rights reserved.
R6
10 k
R10
10 k
R14
10 k
CARD1_SDA
CARD1_SCL
CARD2_SDA
CARD2_SCL
CARDN_SDA
CARDN_SCL
002aab584
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