19-2113; Rev 0; 8/01
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
General Description
The MAX4356 is a 16
✕
16 highly integrated video
crosspoint switch matrix with input and output buffers
and On-Screen Display (OSD) Insertion. This device
operates from dual ±3V to ±5V supplies or from a sin-
gle +5V supply. Digital logic is supplied from an inde-
pendent single +2.7V to +5.5V supply. Individual
outputs can be switched between an input video signal
source and OSD information through an internal, dedi-
cated fast 2:1 mux (40ns switching times) located
before the output buffer. All inputs and outputs are
buffered, with all outputs able to drive standard 75Ω
reverse-terminated video loads.
The switch matrix configuration and output buffer gain
are programmed via an SPI/QSPI
™
-compatible, three-
wire serial interface and initialized with a single update
signal. The unique serial interface operates in two
modes facilitating both fast updates and initialization.
On power-up, all outputs are initialized in the disabled
state to avoid output conflicts in large-array configura-
tions.
Superior flexibility, high integration, and space-saving
packaging make this nonblocking switch matrix ideal
for routing video signals in security and video-on-
demand systems.
The MAX4356 is available in a 128-pin TQFP package
and specified over an extended -40°C to 85°C temper-
ature range.
Features
o
16
✕
16 Nonblocking Matrix with Buffered Inputs
and Outputs
o
Operates from ±3V, ±5V, or +5V Supplies
o
Individually Programmable Output Buffer Gain
(A
V
= +1V/V or +2V/V)
o
High-Impedance Output Disable for Wired-OR
Connections
o
Fast-Switching (40ns) 2:1 OSD Insertion Mux
o
0.1dB Gain Flatness to 14MHz
o
-62dB Crosstalk, -110dB Isolation at 6MHz
o
0.02%/0.12° Differential Gain/Differential Phase
Error
o
Low 195mW Power Consumption (0.76mW per
Point)
MAX4356
Ordering Information
PART
MAX4356ECD
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
128 TQFP
Applications
Security Systems
Video Routing
Video-on-Demand Systems
Pin Configuration appears at end of data sheet.
Functional Diagram
OSDFILL1
OSDFILL0
OSDFILL15
Typical Operating Circuit
MAX4356
IN0
A
V
*
ENABLE/DISABLE
OUT0
CAMERAS
IN0
IN1
OUT0
MONITOR
IN15
MAX4356
OSDFILL0
OUT1
MONITOR
IN1
16 x 16
SWITCH MATRIX
2:1
OSD
MUX
A
V
*
OUT1
IN2
A
V
*
OUT2
IN15
RESET
POWER-ON
RESET
THERMAL
SHUTDOWN
A
V
*
OUT15
DISABLE ALL OUTPUTS
256 16
16
V
CC
V
EE
AGND
V
DD
DGND
DOUT
OSD GENERATOR
OSDKEY0
OSDFILL1
OSDKEY1
OUT15
MONITOR
DECODE LOGIC
DIN
SCLK
UPDATE
CE
SERIAL
INTERFACE
LATCHES
MATRIX REGISTER
96 BITS
UPDATE REGISTER
16 BITS
OSDFILL15
OSDKEY15
AOUT
A0-A3 MODE
*A
V
= +1V/V OR +2V/V
OSDKEY0
OSDKEY15
OSDKEY1
SPI and QSPI are trademarks of Motorola, Inc.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
MAX4356
ABSOLUTE MAXIMUM RATINGS
Analog Supply Voltage (V
CC
- V
EE
) .....................................+11V
Digital Supply Voltage (V
DD
- DGND) ...................................+6V
Analog Supplies to Analog Ground
(V
CC
- AGND) and (AGND - V
EE
) ......................................+6V
Analog Ground to Digital Ground .........................-0.3V to +0.3V
IN_, OSDFILL_ Voltage Range........ (V
CC
+ 0.3V) to (V
EE
- 0.3V)
OUT_ Short-Circuit Duration to AGND, V
CC
, or V
EE
......Indefinite
SCLK,
CE, UPDATE,
MODE, A_, DIN, DOUT,
RESET, AOUT,
OSDKEY_.......(V
DD
+ 0.3V) to (DGND - 0.3V)
Current into Any Analog Input Pin (IN_, OSDFILL_) .........±50mA
Current into Any Analog Output Pin (OUT_).....................±75mA
Continuous Power Dissipation (T
A
= +70°C)
128-Pin TQFP (derate 25mW/°C above +70°C).................2W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C
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.
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V
(V
CC
= +5V, V
EE
= -5V, V
DD
= +5V, AGND = DGND = 0, V
IN
_= 0, V
OSDFILL
_ = 0, R
L
= 150Ω to AGND, and T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Operating Supply Voltage
Range
Logic Supply Voltage Range
SYMBOL
V
CC
-
V
EE
V
DD
to
DGND
(V
EE
+ 2.5V) < V
IN
_
< (V
CC
- 2.5V),
A
V
= +1V/V, R
L
= 150Ω
CONDITIONS
Guaranteed by PSRR test
MIN
4.5
2.7
TYP
MAX
10.5
5.5
UNITS
V
V
0.97
0.995
1
(V
EE
+ 2.5V) < V
IN
_
< (V
CC
- 2.5V),
A
V
= +1V/V, R
L
= 10kΩ
0.99
0.999
1
Gain (Note 1)
A
V
(V
EE
+ 3.75V) < V
IN
_
< (V
CC
- 3.75V),
A
V
= +2V/V, R
L
= 150Ω
1.92
1.996
2.08
V/V
(V
EE
+ 3.75V) < V
IN
_
< (V
CC
- 3.75V)
A
V
= +2V/V, R
L
= 10kΩ
1.94
2.008
2.06
(V
EE
+ 1V) < V
IN
_
< (V
CC
- 1.2V),
A
V
= +1V/V, R
L
= 10kΩ
Gain Matching
(Channel to Channel)
R
L
= 10kΩ
R
L
= 150Ω
0.95
0.994
1
0.5
0.5
1.5
2
%
2
_______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V (continued)
(V
CC
= +5V, V
EE
= -5V, V
DD
= +5V, AGND = DGND = 0, V
IN
_= 0, V
OSDFILL
_ = 0, R
L
= 150Ω to AGND, and T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Temperature Coefficient of Gain
SYMBOL
TC
AV
R
L
= 10kΩ
A
V
= +1V/V
R
L
= 150Ω
Input Voltage Range
V
IN
_
R
L
= 10kΩ
A
V
= +2V/V
R
L
= 150Ω
R
L
= 10kΩ
V
OUT
R
L
= 150Ω
Input Bias Current
Input Resistance
Output Offset Voltage
Output Short-Circuit Current
Enabled Output Impedance
Output Leakage Current,
Disable Mode
DC Power-Supply Rejection
Ratio
I
B
R
IN
_
V
OFFSET
I
SC
Z
OUT
I
OD
PSRR
(V
EE
+ 1V) < V
IN
_
< (V
CC
- 1.2V)
A
V
= +1V/V
A
V
= +2V/V
Sinking or sourcing, R
L
= 1Ω
(V
EE
+ 1V) < V
IN
_
< (V
CC
- 1.2V)
(V
EE
+ 1V) < V
OUT
_
< (V
CC
- 1.2V)
4.5V < (V
CC
- V
EE
) < 10.5V
Outputs enabled,
T
A
= +25°C
Outputs enabled
Outputs disabled
Quiescent
Supply Current
I
EE
Outputs enabled,
T
A
= +25°C
Outputs enabled
Outputs disabled
I
DD
55
4
60
105
60
V
EE
+ 1
V
EE
+
2.5
V
EE
+
3
V
EE
+
3.75
V
EE
+
1
V
EE
+
2.5
4
10
±5
±10
±40
0.2
0.004
70
110
160
185
80
160
185
80
8
mA
1
±20
±40
CONDITIONS
MIN
TYP
10
V
CC
-
1.2
V
CC
-
2.5
V
V
CC
-
3.1
V
CC
-
3.75
V
CC
-
1.2
V
CC
-
2.5
11
V
V
µA
MΩ
mV
mA
Ω
µA
dB
MAX
UNITS
ppm/°C
MAX4356
Output
Voltage Range
I
CC
R
L
=
∞
R
L
=
∞
_______________________________________________________________________________________
3
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
MAX4356
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V
(V
CC
= +3V, V
EE
= -3V, V
DD
= +3V, AGND = DGND = 0, V
IN
_ = 0, V
OSDFILL
_ = 0, R
L
= 150Ω to AGND, and T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Operating Supply Voltage
Range
Logic Supply Voltage Range
SYMBOL
V
CC
- V
EE
V
DD
to
DGND
(V
EE
+ 1V) < V
IN
_
< (V
CC
- 1.2V),
A
V
= +1V/V, R
L
= 150Ω
(V
EE
+ 1V) < V
IN
_
< (V
CC
- 1.2V),
A
V
= +1V/V, R
L
= 10kΩ
Gain (Note 1)
A
V
(V
EE
+ 2V) < V
IN
_
< (V
CC
- 2.1V),
A
V
= +2V/V, R
L
= 150Ω
(V
EE
+ 2V) < V
IN
_
< (V
CC
- 2.1V)
A
V
= +2V/V, R
L
= 10kΩ
Gain Matching
(Channel to Channel)
Temperature Coefficient of
Gain
TC
AV
R
L
= 10kΩ
A
V
= +1V/V
R
L
= 150Ω
Input Voltage Range
V
IN
_
R
L
= 10kΩ
A
V
= +2V/V
R
L
= 150Ω
R
L
= 10kΩ
Output Voltage Range
V
OUT
R
L
= 150Ω
Input Bias Current
Input Resistance
Output Offset
Voltage
I
B
R
IN
V
OFFSET
(V
EE
+ 1V) < V
IN
_
< (V
CC
- 1.2V)
A
V
= +1V/V
A
V
= +2V/V
V
EE
+
1
V
EE
+
1
V
EE
+
2
V
EE
+
2
V
EE
+
1
V
EE
+
1
4
10
±5
±10
±20
±40
R
L
= 10kΩ
R
L
= 150Ω
1.92
1.985
2.08
CONDITIONS
Guaranteed by PSRR test
MIN
4.5
2.7
0.94
0.983
TYP
MAX
10.5
5.5
1
UNITS
V
V
0.96
0.993
1
V/V
1.94
2.000
0.5
0.5
10
2.06
1.5
2
%
ppm/°C
V
CC
-
1.2
V
CC
-
1.2
V
V
CC
-
2.1
V
CC
-
2.1
V
CC
-
1.2
V
V
CC
-
1.2
11
µA
MΩ
mV
4
_______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V (continued)
(V
CC
= +3V, V
EE
= -3V, V
DD
= +3V, AGND = DGND = 0, V
IN
_ = 0, V
OSDFILL
_ = 0, R
L
= 150Ω to AGND, and T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Output Short-Circuit Current
Enabled Output Impedance
Output Leakage Current,
Disable Mode
DC Power-Supply Rejection
Ratio
SYMBOL
I
SC
Z
OUT
I
OD
PSRR
I
CC
Quiescent
Supply
Current
CONDITIONS
Sinking or sourcing, R
L
= 1Ω
(V
EE
+ 1V) < V
IN
_
< (V
CC
- 1.2V)
(V
EE
+ 1V) < V
OUT
_
< (V
CC
- 1.2V)
4.5V < (V
CC
- V
EE
) < 10.5V
R
L
=
∞
R
L
=
∞
Outputs enabled
Outputs disabled
I
EE
I
DD
Outputs enabled
Outputs disabled
60
MIN
TYP
±40
0.2
0.004
75
95
50
90
45
3
mA
1
MAX
UNITS
mA
Ω
µA
dB
MAX4356
DC ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY +5V
(V
CC
= +5V, V
EE
= 0, V
DD
= +5V, AGND = DGND = 0, V
IN
_ = V
OSDFILL
_ = +1.75V, A
V
= +1V/V, R
L
= 150Ω to AGND, and T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Operating Supply Voltage
Range
Logic-Supply Voltage Range
SYMBOL
V
CC
V
DD
to
DGND
(V
EE
+ 1V) < V
IN
< (V
CC
- 2.5V),
A
V
= +1V/V, R
L
= 150Ω
(VEE + 1V) < VIN < (VCC - 1.2V),
AV = +1V/V, RL = 10kΩ
R
L
= 10kΩ
R
L
= 150Ω
TC
AV
R
L
= 10kΩ
Input Voltage Range
V
IN
A
V
= +1V/V
R
L
= 150Ω
V
EE
+1
V
EE
+1
CONDITIONS
Guaranteed by PSRR test
MIN
4.5
2.7
0.94
0.94
0.995
0.995
0.5
0.5
10
V
CC
- 1.2
V
CC
- 2.5
V
TYP
MAX
5.5
5.5
1
V/V
1
3
3
%
ppm/°
C
UNITS
V
V
Gain (Note 1)
A
V
Gain Matching (Channel to
Channel)
Temperature Coefficient of Gain
_______________________________________________________________________________________
5
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