MAX7369 Maxim Integrated Products, MAX7369 Datasheet - Page 16

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

I
level to data and clock lines. There are tradeoffs
between power dissipation and speed, and a compro-
mise must be made in choosing pullup resistor values.
Every device connected to the bus introduces some
capacitance even when the device is not in operation.
I
(30% to 70%) for fast mode, which is defined for a data
rate of 400kbps (refer to I
In order to meet the rise time requirement, choose the
pullup resistors such that the rise time (t
0.85R
4-Channel I
16
2
2
C requires pullup resistors to provide a logic-high
C specifies 300ns rise times to go from low to high
TOP VIEW
______________________________________________________________________________________
PULLUP
x C
BUS
RESET
Choosing Pullup Resistors
GND
SD0
SC0
SD1
SC1
) is less than 300ns. For a bus
A0
A1
2
1
4
5
6
7
8
2
3
C specifications for details).
2
+
C Switches/Multiplexer
MAX7368
TSSOP
16
15
14
13
12
11
10
9
V
SDA
SCL
A2
SC3
SD3
SC2
SD2
DD
R
=
capacitance of 400pF, choose a pullup resistor less
than 880Ω. Often I
specified rise time is exceeded. However, if the rise
times become too slow, the devices on the bus do not
recognize the command signals. Optional resistors (24Ω)
in series with SDA and SCL protect the device inputs
from high-voltage spikes on the bus lines and also mini-
mize crosstalk and undershoot of the bus signals.
PROCESS: BiCMOS
Pin Configurations (continued)
INT0
INT1
GND
SD0
SC0
SD1
SC1
A0
A1
A2
10
1
2
3
4
5
6
7
8
9
+
MAX7369
TSSOP
2
C devices work when the maximum
Chip Information
20
19
18
17
16
15
14
13
12
11
V
SDA
SCL
INT
SC3
SD3
INT3
SC2
SD2
INT2
DD