MAX7369 Maxim Integrated Products, MAX7369 Datasheet - Page 15

• Manufacturer Part Number: MAX7369
• Description: (MAX7367 - MAX7369) 4-Channel I2C Switches / Multiplexer
• Manufacturer: Maxim Integrated Products

A master initiates communication with a slave device
by issuing a START condition followed by a slave
address byte. The slave address byte consists of 7
address bits and a read/write bit (R/W). When idle, the
MAX7367/MAX7368/MAX7369 continuously wait for a
START condition followed by its slave address. After
recognizing a start condition followed by the correct
address, the MAX7367/MAX7368/MAX7369 are ready
to accept or send data. The least significant bit (LSB) of
the address byte (R/W) determines whether the master
is writing to or reading from the MAX7367/MAX7368/
MAX7369 (R/W = 0 selects a write command, R/W = 1
selects a read command as shown in Figures 12 and
13). After receiving the proper address, the
MAX7367/MAX7368/MAX7369 (slave) issue an ACK by
pulling SDA low for one clock cycle.
Figure 12. Read Command
Figure 13. Write Command
() A2 = 0 FOR MAX7367.
**
** DON'T CARE FOR MAX7369.
X = DON'T CARE.
() A2 = 0 FOR MAX7367.
* DON'T CARE FOR MAX7369.
DON'T CARE FOR MAX7368.
S
S
1
1
START CONDITION
START CONDITION
1
1
______________________________________________________________________________________
DEVICE ADDRESS
1
DEVICE ADDRESS
1
0
0
(A2)
(A2)
4-Channel I
A1
A1
Serial Addressing
A0
A0
1
0
A
A
INT3* INT2* INT1* INT0*
X
ACKNOWLEDGE BIT
FROM SLAVE
ACKNOWLEDGE BIT
FROM SLAVE
2
X
C Switches/Multiplexer
The MAX7367/MAX7368/MAX7369 allow systems to
reuse slave addresses individually on each channel of
the extended bus. To reuse slave addresses on the
extended bus channels of the MAX7367/MAX7368,
ensure no more than one channel with a reused
address is selected at the same time.
The MAX7367/MAX7368/MAX7369 operate from a
+2.3V to +5.5V power-supply voltage. Good power-
supply decoupling is needed to maintain the perfor-
mance of these parts. Bypass V
surface-mount ceramic capacitor. Mount the bypass
capacitor as close as possible to the device.
X
CONTROL BYTE
CONTROL BYTE
X
B3**
B3*
Applications Information
Power-Supply Considerations
B2
B2
Repeated Slave Addresses
STOP CONDITION
STOP CONDITION
B1
B1
B0
B0
DD
NA
A
to GND with a 0.1µF
P
P
NOT ACKNOWLEDGE
BIT FROM MASTER
ACKNOWLEDGE
BIT FROM SLAVE
15