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MAX4573 Schematic ( PDF Datasheet ) - Maxim Integrated

Teilenummer MAX4573
Beschreibung Serially Controlled / Clickless Audio/Video Switches
Hersteller Maxim Integrated
Logo Maxim Integrated Logo 




Gesamt 16 Seiten
MAX4573 Datasheet, Funktion
19-1404; Rev 1; 4/99
Serially Controlled, Clickless
Audio/Video Switches
General Description
The MAX4571–MAX4574 serial-interface controlled
switches are ideal for multimedia applications. Each
device features 35max on-resistance, -90dB audio
off-isolation at 20kHz, -60dB video off-isolation at
1.0MHz, and “clickless” mode operation for audio
applications.
The MAX4571/MAX4573 contain eleven SPST switches,
while the MAX4572/MAX4574 contain two SPST switch-
es and six SPDT switches. The MAX4571/MAX4572 fea-
ture a 2-wire, I2C™-compatible serial interface. The
MAX4573/MAX4574 feature a 3-wire, SPI™/QSPI™/
MICROWIRE™-compatible serial interface. All four
parts are available in 28-pin QSOP, SSOP, and wide
SO packages and operate over the commercial and
extended temperature ranges.
Features
o Selectable Soft Switching Mode for “Clickless”
Audio Operation
o 35max On-Resistance
o -90dB Audio Off-Isolation at 20kHz
-50dB Video Off-Isolation at 10MHz
o -90dB Audio Crosstalk at 20kHz
-52dB Video Crosstalk at 10MHz
o Serial Interface
2-Wire, Fast-Mode, I2C-Compatible (MAX4571/72)
3-Wire, SPI/QSPI/MICROWIRE-Compatible
(MAX4573/74)
o Single-Supply Operation from +2.7V to +5.25V
Set-Top Boxes
PC Multimedia Boards
Applications
Audio Systems
Video Conferencing Systems
Pin Configurations
TOP VIEW
MAX4571/MAX4573
NO1 1
COM1 2
NO2 3
COM2 4
NO3 5
COM3 6
NO4 7
COM4 8
NO5 9
COM5 10
NO6 11
COM6 12
NO7 13
COM7 14
28 V+
27 SDA (DOUT)
26 SCL (DIN)
25 A1 (SCLK)
24 A0 (CS)
23 GND
22 NO8
21 COM8
20 NO9
19 COM9
18 NO10
17 COM10
16 NO11
15 COM11
PART
MAX4571CEI
MAX4571CAI
MAX4571CWI
MAX4571EEI
MAX4571EAI
MAX4571EWI
MAX4572CEI
MAX4572CAI
MAX4572CWI
MAX4572EEI
MAX4572EAI
MAX4572EWI
MAX4573CEI
MAX4573CAI
MAX4573CWI
MAX4573EEI
MAX4573EAI
MAX4573EWI
MAX4574CEI
MAX4574CAI
MAX4574CWI
MAX4574EEI
MAX4574EAI
MAX4574EWI
Ordering Information
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
28 QSOP
28 SSOP
28 Wide SO
28 QSOP
28 SSOP
28 Wide SO
28 QSOP
28 SSOP
28 Wide SO
28 QSOP
28 SSOP
28 Wide SO
28 QSOP
28 SSOP
28 Wide SO
28 QSOP
28 SSOP
28 Wide SO
28 QSOP
28 SSOP
28 Wide SO
28 QSOP
28 SSOP
28 Wide SO
( ) ARE FOR MAX4573
QSOP/SSOP/SO
Pin Configurations continued at end of data sheet.
I2C is a trademark of Philips Corp.
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.






MAX4573 Datasheet, Funktion
Serially Controlled, Clickless
Audio/Video Switches
Note 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 3: Guaranteed by design. Not subject to production testing.
Note 4: RON = RON(MAX) - RON(MIN).
Note 5: Resistance flatness is defined as the difference between the maximum and minimum on-resistance values, as measured
over the specified analog signal range.
Note 6: Leakage parameters are 100% tested at maximum rated temperature, and guaranteed by correlation at TA = +25°C.
Note 7: Off-isolation = 20 log [VCOM_ / VNO_ _ ], VCOM_ = output, VNO_ _ = input to off switch.
Note 8: All timing is measured from the rising clock edge of the ACK bit for 2-wire, and from the rising edge of CS for 3-wire. Turn-
off time is defined at the output of the switch for a 0.5V change, tested with a 300load to ground. Turn-on time is mea-
sured with a 5kload resistor to GND. All timing is shown with respect to 20% V+ and 70% V+, unless otherwise noted.
Note 9: Supply current can be as high as 2mA per switch during switch transitions in the clickless mode, corresponding to a 28mA
total supply transient current requirement.
Note 10: Leakage testing for single-supply operation is guaranteed by testing with a single +5.25V supply.
Note 11: Cb = capacitance of one bus line in pF. Tested with Cb = 400pF.
Note 12: Typical values are for MAX4573/MAX4574 devices.
(V+ = +5V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
ON-RESISTANCE vs. VCOM
50
45 V+ = 2.7V
40
35
V+ = 3.3V
30
25
V+ = 5.0V
20
012345
VCOM (V)
SUPPLY CURRENT vs. TEMPERATURE
5.1
ON-RESISTANCE vs.
VCOM AND TEMPERATURE
32
30
TA = +85°C
28
TA = +70°C
26
TA = +25°C
24
22
20 TA = -40°C
18
01234
VCOM (V)
5
CHARGE INJECTION vs. VCOM
3
LEAKAGE CURRENT vs. TEMPERATURE
100
10
1
COM_ OFF
0.1
NO_ _ OFF
0.01
0.001
-40 -20
NO_ _ ON
0 20 40 60
TEMPERATURE (°C)
80
ON/OFF TIME vs. TEMPERATURE
(HARD MODE)
600
5.0 2 500
4.9 1 400 tON, V+ = 3V
4.8 0 300 tON, V+ = 5V
4.7
4.6
4.5
-40 -20
0 20 40 60
TEMPERATURE (°C)
80
-1
-2
-3
01 2345
VCOM (V)
200
100
0
-40 -20
tOFF, V+ = 3V
tOFF, V+ = 5V
0 20 40 60
TEMPERATURE (°C)
80
6 _______________________________________________________________________________________

6 Page









MAX4573 pdf, datenblatt
Serially Controlled, Clickless
Audio/Video Switches
Table 3. 2-Wire Serial-Interface Data Format
RESET Command
Address Byte
MSB
Command Byte (RESET)
LSB MSB
LSB
S 011 0 1A A0 A0 0 XX X X X X A S
R
10
C
CT
TK
KP
SWITCHSET Command
Address Byte
MSB
Command Byte (SWITCHSET)
LSB MSB
LSB
S 0 11 0 1A A 0 A1 1 XX X X X X A
R
10
C
C
T KK
MAX4571
MSB
First Data Byte
LSB MSB
Second Data Byte
X X X X X SW SW SW A SW SW SW SW SW SW
11 10 9 C 8
7 6 54 3
K
MAX4572
First Data Byte
MSB LSB MSB
Second Data Byte
X X SW SW SW SW SW SW A SW SW SW SW SW SW
8 5 7B 7A 6B 6A C 4B 4A 3B 3A 2B 2A
K
SW
2
SW
1B
LSB
SW
1
A
C
K
LSB
SW
1A
A
C
K
S
T
P
S
T
P
MODESET Command
Address Byte
MSB
S0 11 0 1A A
R 10
T
MAX4571
MSB
First Data Byte
X X X X X SW
11
MAX4572
MSB
XX
First Data Byte
SW SW SW SW
8 5 7B 7A
Command Byte (MODESET)
MSB
0 A0 1 XX
C
K
LSB MSB
SW SW
10 9
A SW
C8
K
SW
7
LSB MSB
SW SW
6B 6A
A SW
C 4B
K
SW
4A
LSB
XXX X A
C
K
Second Data Byte
SW SW SW SW
6 54 3
Second Data Byte
SW SW SW SW
3B 3A 2B 2A
SW
2
SW
1B
LSB
SW
1
A
C
K
LSB
SW A
1A C
K
S
T
P
S
T
P
X = Don't Care
SRT = Start Condition
ACK = Acknowledge Condition
STP = Stop Condition
Logic "0" in any data bit location places the associated switch open or in soft (clickless) switching mode.
Logic "1" in any data bit location places the associated switch closed or in hard switching mode.
For command bit configuration see Table 1.
12 ______________________________________________________________________________________

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