PCA9513A Просмотр технического описания (PDF) - Philips Electronics
Номер в каталоге
Компоненты Описание
производитель
PCA9513A Datasheet PDF : 25 Pages
| |||
Philips Semiconductors
PCA9513A; PCA9514A
Hot swappable I2C-bus and SMBus bus buffer
30
RPU
(kΩ)
20
10
002aab582
Rmax = 24 kΩ
rise time > 300 ns
recommended
pull-up
20
RPU
(kΩ)
15
10
5
002aab583
Rmax = 16 kΩ
rise time > 300 ns
recommended
pull-up
0
0
100
200
300
400
Cb (pF)
Fig 6. Bus requirements for 3.3 V systems
0
0
100
200
300
400
Cb (pF)
Fig 7. Bus requirements for 5 V systems
8.9 Hot swapping and capacitance buffering application
Figure 8 through Figure 11 illustrate the usage of the PCA9513A and PCA9514A in
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.
PCA9513A_PCA9514A_1
Product data sheet
Rev. 01 — 11 October 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
9 of 25
Share Link: 