PCA9514D,112 NXP Semiconductors, PCA9514D,112 Datasheet - Page 8

• Manufacturer Part Number: PCA9514D,112
• Description: IC HOTSWAP I2C/SMBUS BUFF 8-SOIC
• Manufacturer: NXP Semiconductors
• Type: I²C-Bus and SMBus Switchr

Specifications of PCA9514D,112

• Applications: Hot-Swap/SMB Buffer
• Internal Switch(s): Yes
• Current Limit: 50mA
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-1030-5; 935275232112; PCA9514D

Philips Semiconductors
Hot Swapping and Capacitance Buffering
Application
Figures 9 through 12 illustrate the usage of the PCA9513 and
PCA9514 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
2004 Oct 05
BD_SEL
Hot swappable I
Figure 9. Hot swapping multiple I/O cards into a backplane using the PCA9514 in a CompactPCI, VME, and AdvancedTCA system
V
SDA
SCL
CC
10 k
R1
BACKPLANE
R2
10 k
CONNECTOR
BACKPLANE
2
C and SMBus bus buffer
POWER SUPPLY
POWER SUPPLY
POWER SUPPLY
8
HOT SWAP
HOT SWAP
HOT SWAP
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 PCA9513 or PCA9514 drives the capacitance of
everything on the card and the backplane must drive only the 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.
ENABLE
SDAIN
SCLIN
ENABLE
SDAIN
SCLIN
ENABLE
SDAIN
SCLIN
R3
10 k
R7
10 k
R11
10 k
V
V
V
GND
GND
GND
I/O PERIPHERAL CARD 1
I/O PERIPHERAL CARD 2
I/O PERIPHERAL CARD N
CC
CC
CC
0.01 F
0.01 F
0.01 F
C1
C3
C5
SDAOUT
SDAOUT
SDAOUT
SCLOUT
SCLOUT
SCLOUT
READY
READY
READY
PCA9513; PCA9514
R4
10 k
R8
10 k
R12
10 k
10 k
10 k
10 k
R5
R9
R13
Product data sheet
10 k
10 k
10 k
R6
R10
R14
CARD1_SDA
CARD1_SCL
CARD2_SDA
CARD2_SCL
CARDN_SDA
CARDN_SCL
SW02126