19-2113; Rev 0; 8/01
1 6 x 1 6 No n b lo c k in g Vid e o Cro s s p o in t S w it c h
w it h On -S c re e n Dis p la y In s e rt io n a n d I/O Bu ffe rs
Ge n e ra l De s c rip t io n
Fe a t u re s
The MAX4356 is a 16 ✕ 16 highly inte gra te d vide o
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-
p e nd e nt s ing le + 2.7V to + 5.5V s up p ly. Ind ivid ua l
outputs can be switched between an input video signal
source and OSD information through an internal, dedi-
c a te d fa s t 2:1 mux (40ns s witc hing time s ) loc a te d
before the output buffer. All inputs and outputs are
buffered, with all outputs able to drive standard 75Ω
reverse-terminated video loads.
✕
✕ 16 16 Nonblocking Matrix with Buffered Inputs
and Outputs
✕ Operates from ±3V, ±5V, or +5V Supplies
✕ Individually Programmable Output Buffer Gain
(A = +1V/V or +2V/V)
V
✕ High-Impedance Output Disable for Wired-OR
Connections
✕ Fast-Switching (40ns) 2:1 OSD Insertion Mux
✕ 0.1dB Gain Flatness to 14MHz
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
s ig na l. The uniq ue s e ria l inte rfa c e op e ra te s 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.
✕ -62dB Crosstalk, -110dB Isolation at 6MHz
✕ 0.02%/0.12° Differential Gain/Differential Phase
Error
✕ Low 195mW Power Consumption (0.76mW per
Point)
Superior flexibility, high integration, and space-saving
packaging make this nonblocking switch matrix ideal
for routing vid e o s ig na ls in s e c urity a nd vid e o-on-
demand systems.
Ord e rin g In fo rm a t io n
PART
TEMP. RANGE
PIN-PACKAGE
The MAX4356 is available in a 128-pin TQFP package
and specified over an extended -40°C to 85°C temper-
ature range.
MAX4356ECD
-40°C to +85°C
128 TQFP
Pin Configuration appears at end of data sheet.
Ap p lic a t io n s
Security Systems
Video Routing
Fu n c t io n a l Dia g ra m
OSDFILL1
OSDFILL0 OSDFILL15
Video-on-Demand Systems
Typ ic a l Op e ra t in g Circ u it
MAX4356
IN0
IN1
A *
V
OUT0
OUT1
OUT2
OUT15
CAMERAS
IN0
A *
V
2:1
OSD
MUX
16 x 16
SWITCH MATRIX
IN1
OUT0
OUT1
A *
V
IN2
MONITOR
MONITOR
IN15
A *
V
IN15
MAX4356
POWER-ON
RESET
THERMAL
SHUTDOWN
RESET
16
OSDFILL0
OSDKEY0
256
16
DISABLE ALL OUTPUTS
V
CC
V
EE
AGND
DECODE LOGIC
LATCHES
OUT15
OSDFILL1
OSDKEY1
DIN
SCLK
UPDATE
CE
V
DD
SERIAL
INTERFACE
MONITOR
DGND
MATRIX REGISTER
96 BITS
DOUT
OSDFILL15
OSDKEY15
UPDATE REGISTER
16 BITS
AOUT
A0-A3 MODE
OSDKEY0
OSDKEY15
OSDKEY1
*A = +1V/V OR +2V/V
V
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.