PCA9512AD,112 NXP Semiconductors, PCA9512AD,112 Datasheet - Page 9

• Manufacturer Part Number: PCA9512AD,112
• Description: IC LEVSHIFT I2C/SMBUS BUFF 8SOIC
• Manufacturer: NXP Semiconductors
• Type: I²C-Bus and SMBus Switchr

Specifications of PCA9512AD,112

• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Applications: Hot-Swap/SMB Buffer
• Internal Switch(s): Yes
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Logic Family: PCA
• Maximum Operating Temperature: 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Number Of Lines (input / Output): 3 / 3
• Logic Type: Bus Buffer
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-3361-5; 935279721112; PCA9512AD

NXP Semiconductors
PCA9512A_PCA9512B
Product data sheet
Fig 7.
BD_SEL
V
SDA
SCL
10 kΩ
V
CC2
Remark: Application assumes bus capacitance within ‘proper operation’ region of
system
Hot swapping multiple I/O cards into a backplane using the PCA9512A in a cPCI, VME, and AdvancedTCA
CC
R1
BACKPLANE
8.8 Hot swapping and capacitance buffering application
R2
10 kΩ
Figure 7
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 time 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
PCA9512A drives 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.
CONNECTOR
BACKPLANE
through
All information provided in this document is subject to legal disclaimers.
Figure 9
Rev. 5 — 5 January 2011
Level shifting hot swappable I
illustrate the usage of the PCA9512A in applications that take
POWER SUPPLY
POWER SUPPLY
POWER SUPPLY
R3
5.1 Ω
R7
5.1 Ω
R11
5.1 Ω
HOT SWAP
HOT SWAP
HOT SWAP
C2
C4
C6
0.01 μF
0.01 μF
0.01 μF
PCA9512A
PCA9512A
PCA9512A
V
SDAIN
SCLIN
V
SDAIN
SCLIN
V
SDAIN
SCLIN
PCA9512A; PCA9512B
CC
CC
CC
I/O PERIPHERAL CARD N
I/O PERIPHERAL CARD 1
I/O PERIPHERAL CARD 2
V
V
V
GND
GND
GND
CC2
CC2
CC2
SDAOUT
SDAOUT
SDAOUT
SCLOUT
SCLOUT
SCLOUT
C1
0.01 μF
C3
0.01 μF
C5
0.01 μF
Figure 5
ACC
ACC
ACC
2
C-bus and SMBus bus buffer
R4
10 kΩ
R8
10 kΩ
R12
10 kΩ
and
Figure
R5
10 kΩ
R9
10 kΩ
R13
10 kΩ
6.
© NXP B.V. 2011. All rights reserved.
R6
10 kΩ
R10
10 kΩ
R14
10 kΩ
CARD1_SDA
CARD1_SCL
CARD2_SDA
CARD2_SCL
CARDN_SDA
CARDN_SCL
002aab791
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