Datasheet

MAX4548/MAX4549
Serially Controlled, Triple 3x2 Audio/Video
Crosspoint Switches
_______________________________________________________________________________________ 9
Pin Description
COM2B Output 2 of Crosspoint B2525
A0
CS
ABIASL
ABIASH
MID4
SCL
SCLK
A1
DOUT
DIN
SDA
GND
NO3B
SA
NO2A
NO2B
SB
NO3A
NO3C
V+
NO1A
NO1B
SC
NO2C
CBIASH
NO1C
NAME
LSB of 2-Wire Serial-Interface Address Field–20
Chip Select of 3-Wire Serial Interface. Logic low on CS enables serial data to be clocked
in to device. Programming commands are executed on CS’s rising edge.
20–
Low Side of Bias Network for Crosspoint A and B. Use to give the A and B outputs a DC
bias when inputs are AC-coupled (refer to the Using the Internal Bias Resistors section).
2222
High Side of Bias Network for Crosspoint A and B. Use to give the A and B outputs a DC
bias when inputs are AC-coupled (refer to the Using the Internal Bias Resistors section).
2323
Audio Bypass for SA and SB Inputs2424
2-Wire Serial-Interface Clock Input–18
3-Wire Serial-Interface Clock Input18–
LSB+1 of 2-Wire Serial-Interface Address Field–19
Data Output of 3-Wire Serial-Interface. Input data is clocked on SCLK’s falling edge
delayed by 24 clock cycles. DOUT remains active when CS is high.
19–
3-Wire Serial-Interface Data Input. Data is clocked in on SCLK’s rising edge.17–
2-Wire Serial-Interface Data Input. Data is clocked in on SCL’s rising edge.–17
Ground15, 16, 3215, 16, 32
Input 3 to Crosspoint B1414
Shunt Input to Crosspoint A. Use for shunt capacitor of AC ground connection to improve
off-isolation, or as an additional input to switch matrix A.
99
Input 2 to Crosspoint A1010
Input 2 to Crosspoint B1111
Shunt Input to Crosspoint B. Use for shunt capacitor of AC ground connection to improve
off-isolation, or as an additional input to switch matrix B.
1212
Input 3 to Crosspoint A1313
Input 3 to Crosspoint C55
Positive Supply Voltage. Supply range is 2.7V to 5.5V.6, 216, 21
Input 1 to Crosspoint A77
Input 1 to Crosspoint B88
Shunt Input to Crosspoint C. Use for shunt capacitor of AC ground connection to improve
off-isolation, or as an additional input to switch matrix C.
44
Input 2 to Crosspoint C33
High Side of Bias Network for Crosspoint C. Use to give the C outputs a DC bias when
inputs are AC-coupled (refer to the Using the Internal Bias Resistors section).
22
Input 1 to Crosspoint C 11
FUNCTION
PIN
MAX4548 MAX4549