MAX4563CEE+T [MAXIM]
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| 型号： | MAX4563CEE+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
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19-1461; Rev 0; 4/99
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
2/MAX4563
Ge n e ra l De s c rip t io n
Fe a t u re s
The MAX4562/MAX4563 s e ria l-inte rfa c e c ontrolle d
switches are ideal for multimedia applications. Each
♦ Selectable Soft-Switching Mode for “Clickless”
Audio Operation
device features 30Ω max on-resistance (R ), 5Ω R
ON
ON
♦ 30Ω max On-Resistance
match, and 5Ω R
flatness. Audio off-isolation and
ON
crosstalk at 20kHz is -85dB, and video off-isolation and
c ros s ta lk a t 10MHz is -55d B. Both d e vic e s fe a ture
“clickless” mode operation for audio applications.
♦ Audio Performance
-85dB Off-Isolation at 20kHz
-85dB Crosstalk at 20kHz
-0.007% THD
The MAX4562/MAX4563 contain two normally open sin-
gle-pole/double-throw (SPDT) switches and two normal-
ly open single-pole/single-throw (SPST) switches. The
♦ Video Performance
2
-55dB Off-Isolation at 10MHz
-55dB Crosstalk at 10MHz
MAX4562 features a 2-wire I C™-compatible serial
interface. The MAX4563 features a 3-wire SPI™/QSPI™/
MICROWIRE™-compatible serial interface. Both parts
are available in 16-pin QSOP packages and operate
ove r the c omme rc ia l a nd e xte nd e d te mp e ra ture
ranges.
♦ T-Switch Configurable for Improved Off-Isolation
♦ Serial Interface
2
2-Wire I C-Compatible (MAX4562)
3-Wire SPI/QSPI/MICROWIRE-Compatible
(MAX4563)
♦ Single-Supply Operation from +2.7V to +5.5V
Ap p lic a t io n s
Set-Top Boxes
PC Multimedia Boards
Audio Systems
Ord e rin g In fo rm a t io n
Video Conferencing Systems
PART
TEMP. RANGE
0°C to +70°C
PIN-PACKAGE
16 QSOP
MAX4562CEE
MAX4562EEE
MAX4563CEE
MAX4563EEE
-40°C to +85°C
0°C to +70°C
16 QSOP
P in Co n fig u ra t io n
16 QSOP
-40°C to +85°C
16 QSOP
TOP VIEW
V+
1
16 SCL (SCLK)
15 SDA (DIN)
MAX4562
MAX4563
Typ ic a l Op e ra t in g Circ u it
NO1A 2
A0 (CS)
14
COM1
NO1B
GND
3
4
5
13 A1 (DOUT)
12 NO4
COM2
NO2A
NO2B
SIGNAL IN
SIGNAL OUT
NO2A 6
11 COM4
10 NO3
COM3
COM2
NO2B
7
8
9
COM3
NO3
QSOP
( ) ARE FOR MAX4563
2
I C 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.
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
ABSOLUTE MAXIMUM RATINGS
V+ to GND................................................................-0.3V to +6V
NO_ _, COM_, DOUT to GND (Note 1) ........-0.3V to (V+ + 0.3V)
SCL, SDA, CS, SCLK, DIN, A0, A1 to GND..............-0.3V to +6V
Continuous Current into Any Terminal..............................±20mA
Peak Current (NO_ _, COM_ pulsed at 1ms,
Operating Temperature Ranges
MAX456_CEE....................................................0°C to +70°C
MAX456_EEE.................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
10% duty cycle max).....................................................±50mA
Continuous Power Dissipation (T = +70°C)
A
16-Pin QSOP (derate 8.3mW/°C above +70°C)............667mW
Note 1: Signals on NO_ _ or COM_ exceeding V+ or ground are clamped by internal diodes. Limit forward-diode current to maxi-
mum current rating.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS—Single +5V Supply
2/MAX4563
(V+ = +5V ±5%, T = T
A
to T
, unless otherwise noted. Typical values are at T = +25°C.) (Note 2)
MIN
MAX A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ANALOG SWITCHES
V
V
_ _,
NO
Analog Signal Range (Note 3)
0
V+
V
_
COM
I
V
_ = 4mA,
_ _ = 3V,
T
= +25°C
20
3
30
40
5
COM
A
On-Resistance
R
Ω
ON
NO
T = T
A
to T
MAX
V+ = 4.75V
MIN
I
_ = 4mA,
T
= +25°C
COM
A
On-Resistance Match
Between Channels (Note 4)
∆R
V
_ _ = 3V,
Ω
ON
NO
T = T
to T
MAX
7
V+ = 4.75V
A
MIN
I
V
_ = 4mA;
_ _ = 1V, 2V, 3V;
T
= +25°C
2
5
COM
A
On-Resistance
Flatness (Note 5)
R
Ω
FLAT
NO
T = T
A
to T
MAX
7
V+ = 4.75V
MIN
V
_ _ = 4.5V, 1V;
T
= +25°C
-1
-10
-1
0.001
0.001
0.002
1
NO
A
NO_ _ Off-Leakage
Current (Note 6)
I
_ _
V _ = 1V, 4.5V;
COM
V+ = 5.25V
nA
nA
nA
NO
(OFF)
T = T
A
to T
MAX
10
1
MIN
V
_ = 1V, 4.5V;
_ _ = 4.5V, 1V;
T
A
= +25°C
COM
COM_ Off-Leakage
Current (Note 6)
I
_
V
COM (OFF)
NO
T = T
A
to T
MAX
-10
-1
10
1
V+ = 5.25V
MIN
V
_ = 4.5V, 1V;
_ _ = 4.5V, 1V, or
T
A
= +25°C
COM
COM_ On-Leakage
Current (Note 6)
I
_
V
COM (ON)
NO
T = T
A
to T
MAX
-10
10
floating; V+ = 5.25V
MIN
AUDIO PERFORMANCE
R
= 600Ω
0.07
Total Harmonic Distortion
plus Noise
f = 1kHz, V _ _ =
IN NO
L
L
THD+N
%
1V
, V
= 2.5V
R
RMS NO_ _
=10kΩ
0.006
V
_ _ = 1V
, f = 20kHz, R = 600Ω,
NO
RMS IN L
Off-Isolation (Note 7)
V
-85
-85
dB
dB
ISO(A)
Figure 1
V
_ _ = 1V
, f = 20kHz, R = 600Ω,
S
NO
RMS IN
Channel-to-Channel Crosstalk
V
CT(A)
Figure 1
2
_______________________________________________________________________________________
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
2/MAX4563
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)
(V+ = +5V ±5%, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.) (Note 2)
MAX A
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
VIDEO PERFORMANCE
V
_ _ = 1V
, f = 10MHz, R = 50Ω,
NO
RMS IN L
Off-Isolation (Note 7)
V
-55
-55
dB
dB
ISO(V)
Figure 1
V
_ _ = 1V
, f = 10MHz, R = 50Ω,
NO
RMS IN
S
Channel-to-Channel Crosstalk
V
CT(V)
Figure 1
-3dB Bandwidth
Off-Capacitance
BW
R
= 50Ω, R = 50Ω
300
10
MHz
pF
SOURCE
L
C
f
IN
= 1MHz
OFF(NO)
DYNAMIC TIMING WITH CLICKLESS MODE DISABLED (Note 8, Figure 2)
V
_ _ = 2.5V,
= 5kΩ,
= 35pF
T
= +25°C
200
400
500
160
200
NO
A
Turn-On Time
t
R
C
ns
ONSD
L
L
T = T
A
to T
MAX
MIN
V
_ _ = 2.5V,
= 300Ω,
= 35pF
T
A
= +25°C
100
50
NO
Turn-Off Time
t
R
C
ns
ns
OFFSD
L
L
T = T
A
to T
MAX
MIN
Break-Before-Make Time
t
V
NO
_ _ = 2.5V, T = T
to T
MAX
10
BBM
A
MIN
DYNAMIC TIMING WITH CLICKLESS MODE ENABLED (Note 8, Figure 2)
Turn-On Time
t
V
_ _ = 2.5V, R = 5kΩ, C = 35pF
12
3
ms
ms
L
ONSE
NO
L
Turn-Off Time
t
V _ _ = 2.5V, R = 300Ω, C = 35pF
L
NO L
OFFSE
POWER SUPPLY
Supply Voltage Range
Supply Current (Note 9)
V+
I+
T = T
to T
MAX
2.7
5.5
10
V
A
MIN
All logic inputs = 0 or V+, T = T
to T
MAX
6
µA
A
MIN
ELECTRICAL CHARACTERISTICS—Single +3V Supply
(V+ = +3V ±10%, T = T
A
to T , unless otherwise noted. Typical values are at T = +25°C.) (Note 2)
MAX A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ANALOG SWITCHES
V
V
_ _,
NO
Analog Signal Range (Note 3)
On-Resistance
0
V+
V
_
COM
I
V
_ = 4mA,
_ _ = 1V,
T
= +25°C
30
3
60
80
5
COM
A
R
Ω
ON
NO
V+ = 2.7V
T = T
A
to T
MIN MAX
I
_ = 4mA,
_ _ = 1V,
NO
T = +25°C
A
COM
On-Resistance Match
Between Channels (Note 4)
∆R
V
Ω
ON
V+ = 2.7V
T = T
A
to T
MAX
7
MIN
_______________________________________________________________________________________
3
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)
(V+ = +3V ±10%, T = T
A
to T , unless otherwise noted. Typical values are at T = +25°C.) (Note 2)
MAX A
MIN
PARAMETER
SYMBOL
CONDITIONS
= +25°C
MIN
TYP
MAX
UNITS
I
V
= 4mA;
T
A
3
6
COM_
On-Resistance
Flatness (Note 5)
R
= 1V, 1.5V, 2V;
Ω
FLAT
NO_ _
V+ = 2.7V
T = T
to T
MAX
8
1
A
MIN
V
V
_ = 0.5V, 3V;
T
A
= +25°C
-1
-10
-1
0.001
0.001
COM
NO_ _ Off-Leakage
Current (Notes 6, 10)
I
= 3V, 0.5V;
nA
nA
NO_ _(OFF)
NO_ _
V+ = 3.6V
T = T
to T
MAX
10
1
A
MIN
V
V
_ = 0.5V, 3V;
T = +25°C
A
COM
COM_ Off-Leakage
Current (Notes 6, 10)
I
_
= 3V, 0.5V;
COM (OFF)
NO_ _
V+ = 3.6V
T = T
to T
MAX
-10
10
A
MIN
V
V
NO
= 3V, 0.5V;
_ _ = 3V, 0.5V,
COM_
T
A
= +25°C
-1
0.002
1
COM _ On-Leakage
Current (Notes 6, 10)
I
_
nA
COM (ON)
or floating;
V+ = 3.6V
T = T
to T
MAX
-10
10
A
MIN
2/MAX4563
AUDIO PERFORMANCE
R
R
= 600Ω
0.1
L
L
Total Harmonic Distortion
plus Noise
f
= 1kHz, V _ _ =
IN NO
THD+N
%
0.5V
, V
= 1.5V
RMS NO_ _
= 10kΩ
0.01
V
= 0.5V
, f = 20kHz, R = 600Ω,
NO_ _
RMS IN L
Off-Isolation (Note 7)
V
80
85
dB
dB
ISO(A)
Figure 1
V
NO_ _
= 0.5V
, f = 20kHz, R = 600Ω,
S
RMS IN
Channel-to-Channel Crosstalk
VIDEO PERFORMANCE
Off-Isolation (Note 7)
V
CT(A)
Figure 1
V
NO_ _
= 0.5V
, f = 10MHz, R = 50Ω,
RMS IN L
V
ISO(V)
-50
-55
dB
dB
Figure 1
V
NO_ _
= 0.5V
, f = 10MHz, R = 50Ω,
S
RMS IN
Channel-to-Channel Crosstalk
V
CT(V)
Figure 1
-3dB Bandwidth
Off-Capacitance
BW
R
= 50Ω, R = 50Ω
200
10
MHz
pF
SOURCE
L
C
f
IN
= 1MHz
OFF(NO)
DYNAMIC TIMING WITH CLICKLESS MODE DISABLED (Notes 8, 12, and Figure 2)
T
= +25°C
400
200
100
800
1000
350
A
V
= 1.5V,
= 5kΩ, C = 35pF
L
NO_ _
Turn-On Time
t
ns
ONSD
R
L
T = T
A
to T
MAX
MIN
T
A
= +25°C
V
NO_ _
= 1.5V,
Turn-Off Time
t
ns
ns
OFFSD
R
L
= 300Ω, C = 35pF
L
T = T
to T
MAX
500
A
MIN
Break-Before-Make Time
t
V
NO_ _
= 1.5V, T = T
to T
MAX
10
BBM
A
MIN
DYNAMIC TIMING WITH CLICKLESS MODE ENABLED (Notes 8, 12, and Figure 2)
Turn-On Time
Turn-Off Time
t
V
= 1.5V, R = 5kΩ, C = 35pF
12
3
ms
ms
L
ONSE
NO_ _
L
t
V = 1.5V, R = 300Ω, C = 35pF
L
NO_ _ L
OFFSE
4
_______________________________________________________________________________________
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
2/MAX4563
I/O INTERFACE CHARACTERISTICS
(V+ = +2.7V to +5.25V, T = T
A
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DIGITAL INPUTS (SCLK, DIN, CS, SCL, SDA, A0, A1)
V+ = 5V
0.8
0.6
Input Low Voltage
Input High Voltage
V
V
V
IL
V+ = 3V
V+ = 5V
V+ = 3V
3
2
V
IH
Input Hysteresis
V
0.2
0.001
5
V
HYST
Input Leakage Current
Input Capacitance
I
Digital inputs = 0 or V+
f = 1MHz
-1
1
µA
pF
LEAK
C
IN
DIGITAL OUTPUTS (DOUT, SDA)
Output Low Voltage
V
I
= 6mA
0.4
V
V
OL
SINK
DOUT Output High Voltage
V
OH
I
= 0.5mA
V+ - 0.5
SOURCE
2-WIRE TIMING CHARACTERISTICS
(Figure 3, V+ = +2.7V to +5.25V, f
= 100kHz, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
SCL
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
100
UNITS
V+ = 2.7V to 5.25V
V+ = 4.75V to 5.25V
0
SCL Clock Frequency
f
kHz
SCL
400
Bus Free Time between Stop
and Start Conditions
t
4.7
µs
BUF
Hold Time After Start Condition
Stop Condition Setup Time
Data Hold Time
t
t
The first clock is generated after this period
4.0
4.0
0
µs
µs
µs
ns
µs
µs
HD:STA
SU:STO
HD:DAT
t
Data Setup Time
t
250
4.7
4.0
SU:DAT
Clock Low Period
t
LOW
Clock High Period
t
HIGH
20 +
SCL/SDA Rise Time
t
ns
300
R
0.1C
b
20 +
SCL/SDA Fall Time
t
F
ns
ns
300
50
0.1C
b
Pulse Width of Suppressed Spike
0
_______________________________________________________________________________________
5
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
3-WIRE TIMING CHARACTERISTICS
(Figure 5, V+ = +2.7V to +5.25V, f = 2.1MHz, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
OP
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
2.1
UNITS
V+ = 2.7V to 5.25V
V+ = 4.75V to 5.25V
0
Operating Frequency
f
OP
MHz
10
DIN to SCLK Setup
t
100
0
ns
ns
ns
ns
ns
ns
µs
µs
ns
ns
DS
DIN to SCLK Hold
t
DH
t
t
100
0
CS Fall to SCLK Rise Setup
CS Fall to SCLK Rise Hold
SCLK Pulse Width Low
SCLK Pulse Width High
Rise Time (SCLK, DIN, CS)
Fall Time (SCLK, DIN, CS)
SCLK Fall to Output Data Valid
CS Pulse Width High
CSS
CSH
t
200
200
CL
t
CH
t
R
2
2
t
F
t
C
= 50pF
200
LOAD
DO
t
40
CSW
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.
2/MAX4563
Note 4: ∆R
= R
- R
.
ON
ON(MAX)
ON(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 T = +25°C.
A
Note 7: Off-isolation = 20 log (V
_ / V _ _ ), V
_ = output, V _ _ = input to off switch.
COM NO
COM
NO
Note 8: All timing is measured from the clock’s falling edge preceding the ACK signal 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 300Ω load to ground. Turn-on
time is defined at the output of the switch for a 0.5V change and measured with a 5kΩ load 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 12mA
total supply transient current requirement.
Note 10: Leakage testing is guaranteed by testing with a +5.25V supply.
Note 11: C = capacitance of one bus line in pF. Tested with C = 400pF.
b
b
Note 12: Typical values are for MAX4563 devices.
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(V+ = +5V, T = +25°C, unless otherwise noted.)
A
ON-RESISTANCE vs. COM_ VOLTAGE
AND TEMPERATURE
ON-RESISTANCE vs. COM_ VOLTAGE
LEAKAGE CURRENT vs. TEMPERATURE
31
29
27
25
23
21
19
17
15
21
1000
100
10
20
19
18
17
16
15
14
13
12
V+ = 2.7V
T = +85°C
A
COM_OFF
T = +70°C
A
T = +25°C
A
COM_ON
V+ = 3.3V
NO_ _OFF
1
T = -40°C
A
V+ = 5.0V
0.1
0
1
2
3
4
5
0
1
2
3
4
5
-40
-15
10
35
60
85
V
_ (V)
V
COM_
(V)
TEMPERATURE (°C)
COM
6
_______________________________________________________________________________________
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
2/MAX4563
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V+ = +5V, T = +25°C, unless otherwise noted.)
A
TURN-ON AND TURN-OFF TIMES
vs. TEMPERATURE (HARD MODE)
SUPPLY CURRENT vs. TEMPERATURE
CHARGE INJECTION vs. COM_ VOLTAGE
300
5.7
3
250
5.6
5.5
5.4
5.3
5.2
5.1
2
1
t
ON
, V+ = +3V
200
150
100
50
t
ON
, V+ = +5V
0
-1
-2
-3
t
, V+ = +3V
, V+ = +5V
OFF
t
OFF
0
-40
-15
10
35
60
85
-40
-15
10
35
60
85
0
1
2
3
4
5
TEMPERATURE (°C)
TEMPERATURE (°C)
V
COM_
(V)
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
VIDEO FREQUENCY RESPONSE
AUDIO FREQUENCY RESPONSE
0
-20
0
-20
-40
1
600Ω IN AND OUT
600Ω IN AND OUT
SIGNAL = 1V
RMS
INSERTION LOSS
-40
0.1
-60
OFF-ISOLATION
CROSSTALK
-60
-80
OFF-ISOLATION
CROSSTALK
-80
-100
-120
50Ω IN AND OUT
0.01
-100
10
100
1k
10k
100k
0.1
1
10
100
10
100
1000
10,000
100,000
FREQUENCY (Hz)
FREQUENCY (MHz)
FREQUENCY (Hz)
TURN-ON AND TURN-OFF TIMES
(SOFT MODE)
TURN-ON AND TURN-OFF TIMES
(HARD MODE)
CS
(5V/div)
CS
(5V/div)
t
ON
t
ON
(1V/div)
(1V/div)
t
OFF
t
OFF
(1V/div)
(1V/div)
5ms/div
100ns/div
_______________________________________________________________________________________
7
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V+ = +5V, T = +25°C, unless otherwise noted.)
A
SOFT-MODE RISE TIME
SOFT-MODE FALL TIME
2/MAX4563
500µs/div
500µs/div
P in De s c rip t io n
PIN
NAME
FUNCTION
MAX4562
MAX4563
1
1
V+
Positive Supply Voltage
Normally Open Terminals
NO1A, NO1B,
NO2A, NO2B,
NO3, NO4
2, 4, 6, 8,
10, 12
2, 4, 6, 8,
10, 12
3, 7, 9, 11
3, 7, 9, 11
COM1–COM4
GND
A1
Common Terminals
Ground
5
13
–
5
–
LSB + 2 of 2-Wire Serial Interface Address Field
Data Input of 3-Wire Serial Interface
LSB + 1 of 2-Wire Serial Interface Address Field
Chip-Select of 3-Wire Serial Interface
Data Input of 2-Wire Serial Interface
Data Input of 3-Wire Serial Interface
Clock Input of 2-Wire Serial Interface
Clock Input of 3-Wire Serial Interface
13
–
DOUT
A0
14
–
14
–
CS
15
–
SDA
15
–
DIN
16
–
SCL
16
SCLK
8
_______________________________________________________________________________________
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
2/MAX4563
MAX4562
MAX4563
V+
V+
V+
10nF
10nF
V+
COM1
ANALYZER
COM_
NO1
B
2/3
ANALYZER
SIGNAL
N.C.
R
L
2/3
DECODER/
CONTROLLER
R
L
DECODER/
CONTROLLER
SIGNAL
GENERATOR 0dBm
50Ω
NO_ _
GND
GENERATOR 0dBm
COM2
NO2A
GND
a) OFF-ISOLATION
b) CROSSTALK
Figure 1. Off-Isolation and Crosstalk
ACKNOWLEDGE
BIT
3V
0
t < 20ns
R
50%
SCL
t < 20ns
F
MAX4562
MAX4563
V
OUT
V+
V+
10nF
2-WIRE
-0.5V
0
t
ON
V
OUT
V
OUT -
0.5V
NO_ _
COM _
V
NO_ _
V
OUT
0
t
OFF
R
L
C
L
300Ω
35pF
2 OR 3
3V
0
DECODER/
CONTROLLER
SERIAL
INTERFACE
µP
CS
50%
V
OUT
•
0.9
0.1
V
OUT
GND
3-WIRE
0
t
ON
C INCLUDES FIXTURE AND STRAY CAPACITANCE.
V
OUT
L
V
= V
[R / (R + R )]
OUT COM L L ON
•
V
OUT
0
t
OFF
Figure 2. Switching Time
_______________________________________________________________________________________
9
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
transition is slowed to avoid the audible “clicking” that
De t a ile d De s c rip t io n
can occur when switches are used to route audio sig-
nals. In hard mode, the switches are not slowed down,
making this mode useful when a faster response is
required. If a new command is issued while any soft-
mode switch is transitioning, the switch transition time is
decreased so it reaches its final state before the new
command is executed. Soft mode and open are the
power-up default states for all switches. Switches in the
same mode are guaranteed to be break-before-make
relative to each other. Break-before-make does not apply
between switches operating in different modes.
The MAX4562/MAX4563 are serial-interface controlled
switches with soft-mode “clickless” and hard-mode oper-
ating capability. The MAX4562/MAX4563 contain two
SPST s witc he s a nd two SPDT s witc he s . The SPDT
switches are actually 2-to-1 multiplexers, in that each
SPDT is really two independent SPST switches with a
common node, as shown in the Pin Configuration. Each
switch is controlled independently by either the 2-wire
2
I C-compatible or 3-wire SPI/QSPI/MICROWIRE-compat-
ible serial interface.
Audio off-isolation and crosstalk is -85dB at 20kHz.
Video off-isolation and crosstalk is at least -55dB at
10MHz.
These devices operate from a +2.7V to +5.5V single
2
supply. The MAX4562 features a 2-wire I C-compatible
serial interface, and the MAX4563 features a 3-wire
SPI/QSPI/MICROWIRE-compatible serial interface.
Each switch of either device may be set to operate in
either soft or hard mode. In soft mode, the switching
2/MAX4563
70%
70%
20%
70%
20%
70%
20%
70%
20%
SDA
SCL
20%
t
BUF
t
,
t ,
SU STA
SU DAT
t
,
HD STA
t
,
SU STO
t
t ,
HD DAT
LOW
70%
20%
70%
20%
70%
20%
70%
70%
70%
t
HIGH
t
,
HD STA
t
R
t
F
START CONDITION
REPEATED START CONDITION
STOP CONDITION START CONDITION
Figure 3. 2-Wire Serial-Interface Timing Diagram
COMMAND BYTE
SLAVE ADDRESS BYTE
SDA
SCL
MSB
MSB
LSB ACK
LSB
ACK
START CONDITION
STOP CONDITION
Figure 4. A Complete 2-Wire Serial-Interface Transmission
10 ______________________________________________________________________________________
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
2/MAX4563
Table 1. Command-Bit Mapping
C1
0
C0
0
COMMAND
DESCRIPTION
NO_OP
NO_OP
No Operation
No Operation
0
1
1
0
SWITCHSET
MODESET
Sets specified switches open or closed.
1
1
Sets specified switches to soft or hard mode.
A0 and A1 bits in the address byte (Table 3) must dupli-
cate the values present at the A0 and A1 pins of that
chip, and the rest of the address bits must be configured
as shown in Table 3. Connect the A0 and A1 pins to V+
or GND or drive them with CMOS logic levels.
Table 2. Control-Bit Mapping
CONTROL BIT
SWITCH
SW1A
SW1B
SW2A
SW2B
SW3
SWITCH TERMINAL
D5
D4
2, 3
3, 4
The second byte is the command byte, which sets the
command being written to the device. The possible
commands are MODESET and SWITCHSET. Figures 3
and 4 and the I/O Interface Characteristics detail the tim-
ing of the 2-wire serial-interface protocol. All bytes of the
transmission, whether address or command, are sent
MSB first.
D3
6, 7
D2
7, 8
D1
9, 10
11, 12
D0 (LSB)
SW4
Ap p lic a t io n s In fo rm a t io n
The MAX4562/MAX4563 are receive-only devices and
must be controlled by a bus master device. A bus mas-
ter signals the beginning of a transmission with a start
condition by transitioning SDA from high to low while
SCL is high. The slave devices monitor the serial bus
continuously, waiting for the start condition followed by
an address byte. When a device recognizes its address
byte, it acknowledges by pulling the SDA line low for one
clock period; it is then ready to accept the command
byte. The device also issues a similar acknowledgment
after the command byte. When the master has finished
communicating with the slave, it issues a stop condition
by transitioning SDA from low to high while SCL is high.
The bus is then free for another transmission.
S w it c h Co n t ro l
The MAX4562/MAX4563 have a common command-
and control-bit structure; the only difference is the inter-
face type (2-wire or 3-wire).
The SWITCHSET command controls the open/closed
s ta te s of the va rious s witc he s . MODESET c ontrols
soft/hard-mode switch states. The NO_OP command is
useful for daisy-chaining multiple 3-wire parts.
Table 1 shows the command bits’ configuration and their
related commands. Table 2 shows the configuration of
the data bits and their related switches. After a SWITCH-
SET command is issued, a logic “1” in any data-bit loca-
tion closes the associated switch, while a logic “0”
opens it. After a MODESET command, a logic “1” in any
data-bit location sets the associated switch into soft
mode, while a logic “0” sets it into hard mode.
3 -Wire S e ria l In t e rfa c e
The MAX4563 uses a 3-wire SPI/QSPI/MICROWIRE-com-
patible serial interface. An active-low chip select (CS) pin
enables the device to receive data from the serial input
pin, DIN. Command and data information are clocked in
on the rising edge of the serial clock signal (SCLK) MSB
first. A total of eight bits is needed in each write cycle.
The command code is contained in the two MSBs of the
8-bit word. The remaining bits control the switches as
shown in Table 4. While shifting in the serial data, the
device remains in its original configuration. A rising edge
on CS latches the data into the MAX4563’s internal regis-
ter, initiating the device’s change of state. Table 4 shows
the details of the 3-wire interface structure.
2 -Wire S e ria l In t e rfa c e
The MAX4562 uses a 2-wire I2C-compatible serial inter-
face, requiring only two I/O lines of a standard micro-
processor port for communication. These devices use
a SendByte™ protocol. The SendByte protocol consists
of one byte of address field followed by one byte of
command field.
The first byte of any 2-wire serial-interface transaction is
always the address byte. To address a given chip, the
SendByte is a trademark of Philips Corp.
______________________________________________________________________________________ 11
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
Table 3. MAX4562 2-Wire Serial-Interface Data Format
ADDRESS BYTE
COMMAND BYTE
MSB
LSB
A1 A0
MSB
ACK C1
LSB
SRT
1
0
0
1
1
0
C0 SW2A SW1B SW2A SW2B SW3 SW4 ACK STP
STP = Stop Condition
Logic “0” in any data bit location places the associated switch open or in hard switching mode.
Logic “1” in any data bit location places the associated switch closed or in soft (clickless) switching mode.
See Table 1 for command-bit configuration.
Data are shifted through the MAX4563 in series. When
Table 4. MAX4563 3-Wire Serial-Interface
Data Format
CS is brought high, all devices are updated simultane-
ously. If any of the devices in the chain are to be left
unchanged, use a NO_OP command for that device, as
shown in Table 1.
COMMAND
MSB
SWITCH CONTROL
LSB
D0
D7
C1
D6
C0
D5
D4
D3
D2
D1
An alternate way of connecting multiple devices is to
decode the CS line. In this case, do not use the DOUT
pin and connect the DIN pins of all devices together.
Address decode logic individually controls the CS line
of each device. When a device is to be selected, its CS
line is brought low, data are shifted in, and its CS line is
then brought high to execute the command.
SW1A SW1B SW2A SW3B SW3
SW4
2/MAX4563
Figures 5 and 6 and the I/O Interface Characteristics
show the timing details of the 3-wire interface. If the two
command bits initiate a SWITCHSET command, a logic
“1” in a switch control location closes the associated
switch, while a logic “0” opens it. If the command bits ini-
tiate a MODESET command, a logic “1” in a switch con-
trol loc a tion s e ts the a s s oc ia te d s witc h into s oft
“clickless” mode, while a logic “0” sets it into hard mode.
For command-bit configurations, see Table 1.
For command bit configuration see Table 1.
T-S w it c h e s
Config ure the MAX4562/MAX4563 a s a T-s witc h to
improve off-isolation. As the signal frequency is in-
creased, parasitic capacitance significantly degrades
the off-isolation. Figure 7 shows a typical T-switch con-
figuration using the MAX4562/MAX4563 to improve off-
isolation. COM2 and COM3 are tied together to create
a single common node. NO2A and NO2B act as the
input and output of the T-switch, while NO3 is tied to
ground. When both SW2A and SW2B are closed, SW3
should be open to allow the signal to pass into NO2A
and out of NO2B. However, when SW2A and SW2B are
open, energy that is coupled through the open switch-
es is shunted to ground through SW3, which should
now be closed. This increases the off-isolation to typi-
cally -68dB at 10MHz (Figure 8).
Us in g Mu lt ip le De vic e s
There are two ways to connect multiple devices to the
same 3-wire serial interface. The first involves using the
DOUT pin. DOUT presents a copy of the last bit of the
internal shift register, useful for daisy-chaining multiple
d e vic e s . Da ta a t DOUT a re s imp ly the inp ut d a ta
delayed by eight clock cycles, appearing synchronous
with SCLK’s falling edge. After CS goes high, DOUT
holds the last bit in the shift register until new data are
shifted into DIN. For a simple interface using several
MAX4563 devices, daisy-chain the shift registers by
connecting DOUT of the first device to DIN of the sec-
ond, etc. Connect the CS pins of all devices together.
12 ______________________________________________________________________________________
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
2/MAX4563
70%
20%
CS
20%
t
CSW
t
t
CSO
CSH
t
CL
t
CH
t
CSS
70%
70%
70%
SCLK
20%
20%
20% 20%
20%
t
DH
t
DS
D7
D6
D1
D0
DIN
t
DO
DOUT
Figure 5. 3-Wire Serial-Interface Timing Diagram
SWITCHES UPDATED
CS
-20
-40
-60
SCLK
SPST
SWITCH
DATA CLOCKED IN
DIN
D7
D6 D5 D4 D3 D2 D1 D0
LSB
-80
MSB
T-SWITCH
-100
INPUT DATA BITS
DATA CLOCKED OUT
-120
DOUT
D7
0.1
1
10
100
D6 D5 D4 D3 D2 D1 D0
D7
FREQUENCY (MHz)
DATA BITS FROM PREVIOUS DATA INPUT
DOUT POWER-UP DEFAULT: D7–D0 = 0
Figure 8. Off-Isolation vs. Frequency
Figure 6. A Complete 3-Wire Serial-Interface Transmission
___________________Ch ip In fo rm a t io n
TRANSISTOR COUNT: 3518
COM2
NO2A
NO2B
SIGNAL IN
SIGNAL OUT
COM3
NO3
Figure 7. T-Switch Configuration
______________________________________________________________________________________ 13
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
P a c k a g e In fo rm a t io n
2/MAX4563
14 ______________________________________________________________________________________
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
2/MAX4563
NOTES
______________________________________________________________________________________ 15
S e ria lly Co n t ro lle d , Clic k le s s
Au d io /Vid e o S w it c h e s
NOTES
2/MAX4563
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
16 ____________________Ma x im In t e g ra t e d P ro d u c t s , 1 2 0 S a n Ga b rie l Drive , S u n n yva le , CA 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0
© 1999 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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