pca9600 NXP Semiconductors, pca9600 Datasheet - Page 3

• Manufacturer Part Number: pca9600
• Description: Dual Bidirectional Bus Buffer
• Manufacturer: NXP Semiconductors

NXP Semiconductors
6. Pinning information
7. Functional description
PCA9600_2
Product data sheet
6.1 Pinning
6.2 Pin description
Table 3.
Refer to
The PCA9600 has two identical buffers allowing buffering of SDA and SCL I
signals. Each buffer is made up of two logic signal paths, a forward path from the I
interface, pins SX and SY which drive the buffered bus, and a reverse signal path from the
buffered bus input, pins RX and RY to drive the I
The rest of this discussion will address only the ‘X’ side of the buffer; the ‘Y’ side is
identical.
The I
Symbol
SX
RX
TX
GND
TY
RY
SY
V
Fig 2.
•
•
CC
sense the voltage state of I
(and TY respectively), and
sense the state of pins RX and RY and pull the I
pin RY is LOW.
2
C-bus pin SX is designed to interface with a normal I
Figure 1 “Block diagram of
GND
Pin configuration for SO8
SX
RX
TX
Pin description
1
2
3
4
Pin
1
2
3
4
5
6
7
8
PCA9600D
002aac836
Rev. 02 — 13 August 2008
Description
I
receive signal
transmit signal
negative supply voltage
transmit signal
receive signal
I
positive supply voltage
2
2
8
7
6
5
C-bus (SDA or SCL)
C-bus (SDA or SCL)
2
C-bus pins SX (and SY) and transmit this state to pin TX
V
SY
RY
TY
CC
PCA9600”.
Fig 3.
2
C-bus interface. These paths:
2
GND
C-bus pin LOW whenever pin RX or
RX
Pin configuration for TSSOP8
(MSOP8)
SX
TX
1
2
3
4
2
Dual bidirectional bus buffer
C-bus.
PCA9600DP
002aac837
PCA9600
© NXP B.V. 2008. All rights reserved.
8
7
6
5
2
C-bus
V
SY
RY
TY
CC
2
C-bus
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