MAX4456CPL ,Low-Cost 4x4 / 8x4 / 8x8 Video Crosspoint SwitchesFeaturesThe MAX4359/MAX4360/MAX4456 low-cost video cross- Eight (MAX4456) or Four (MAX4359/MAX4360 ..
MAX4456CPL ,Low-Cost 4x4 / 8x4 / 8x8 Video Crosspoint SwitchesMAX4359/MAX4360/MAX445619-1389; Rev 1; 12/99Low-Cost 4x4, 8x4, 8x8Video Crosspoint Switches
MAX4456CPL+ ,Low-Cost 4x4, 8x4, 8x8 Video Crosspoint SwitchesELECTRICAL CHARACTERISTICS(V+ = +5V, V- = -5V, V = +5V (internal load resistors on), V = V = V = 0V ..
MAX4456EPL+ ,Low-Cost 4x4, 8x4, 8x8 Video Crosspoint SwitchesELECTRICAL CHARACTERISTICS(V+ = +5V, V- = -5V, V = +5V (internal load resistors on), V = V = V = 0V ..
MAX4456EPL+ ,Low-Cost 4x4, 8x4, 8x8 Video Crosspoint Switchesapplications demanding36 SSOPMAX4360EAX -40°C to +85°C A36-2better DC specifications, see the MAX45 ..
MAX4460ESA ,SOT23 / 3V/5V / Single-Supply / Rail-to-Rail Instrumentation Amplifiers
MAX848ESE ,1-Cell to 3-Cell / High-Power / Low-Noise / Step-Up DC-DC Convertersapplications, such as portable' 3.3V Dual Mode™ or 2.7V to 5.5V Adj. Outputphones and small systems ..
MAX848ESE ,1-Cell to 3-Cell / High-Power / Low-Noise / Step-Up DC-DC ConvertersFeaturesThe MAX848/MAX849 boost converters set a new stan- ' Up to 95% Efficiencydard of high effic ..
MAX848ESE+ ,1-Cell-to-3-Cell, High-Power, Low-Noise, Step-Up DC-DC ConvertersELECTRICAL CHARACTERISTICS(V = 3.6V, GND = PGND = CLK/SEL = ON1 = ON2 = AINSEL = AIN1 = AIN2 = FB = ..
MAX848ESE+T ,1-Cell-to-3-Cell, High-Power, Low-Noise, Step-Up DC-DC ConvertersApplicationstion ensures that the switching noise spectrum is limitedto the 300kHz fundamental and ..
MAX848ESE-T ,1-Cell-to-3-Cell, High-Power, Low-Noise, Step-Up DC-DC ConvertersFeaturesThe MAX848/MAX849 boost converters set a new stan- ♦ Up to 95% Efficiencydard of high effic ..
MAX849ESE ,1-Cell to 3-Cell / High-Power / Low-Noise / Step-Up DC-DC ConvertersMAX848/MAX84919-1095; Rev 2; 12/971-Cell to 3-Cell, High-Power,Low-Noise, Step-Up DC-DC Converters
MAX4359EAX-MAX4360EAX-MAX4456CPL
Low-Cost 4x4 / 8x4 / 8x8 Video Crosspoint Switches
General DescriptionThe MAX4359/MAX4360/MAX4456 low-cost video cross-
point switches are designed to reduce component count,
board space, design time, and system cost. Each con-
tains a matrix of T-switches that connect any of their four
(MAX4359) or eight (MAX4360/MAX4456) video inputs to
any of their buffered outputs, in any combination. Each
matrix output is buffered by an internal, high-speed
(250V/µs), unity-gain amplifier that is capable of driving
400Ωand 20pF at 2.6Vp-p. For applications requiring
increased drive capability, buffer the MAX4359/
MAX4360/MAX4456 outputs with the MAX497 quad,
gain-of-two video line driver.
The MAX4456 has a digitally controlled 8x8 switch matrix
and is a low-cost pin-for-pin compatible alternative to the
popular MAX456. The MAX4359/MAX4360 are similar to
the MAX4456, with the 8x8 switch matrix replaced by a
4x4 (MAX4359) or an 8x4 (MAX4360) switch matrix.
Three-state output capability and internal, programmable
active loads make it feasible to parallel multiple devices
to form larger switch arrays. The inputs and outputs are
on opposite sides, and a quiet power supply or digital
input line separates each channel, which reduces
crosstalk to -70dB at 5MHz. For applications demanding
better DC specifications, see the MAX456 8x8 video
crosspoint switch.
________________________
Applications
FeaturesEight (MAX4456) or Four (MAX4359/MAX4360)
Internal Buffers
250V/µs Slew Rate
Three-State Output Capability
Power-Saving Disable Feature
65MHz -3dB BandwidthRoutes Any Input Channel to Any Output ChannelSerial or Parallel Digital InterfaceExpandable for Larger Switch Matrices80dB All-Channel Off-Isolation at 5MHz70dB Single-Channel CrosstalkStraight-Through Pinouts Simplify LayoutLow-Cost Pin-Compatible Alternative to
MAX456 (MAX4456)
MAX4359/MAX4360/MAX4456
Low-Cost 4x4, 8x4, 8x8
Video Crosspoint Switches_________________________________________________
Typical Application Circuits19-1389; Rev 1; 12/99
High-Speed Signal
Routing
Video-On-Demand
Systems
Video Test Equipment
Video Conferencing
Security Systems
Ordering Information
MAX4359/MAX4360/MAX4456
Low-Cost 4x4, 8x4, 8x8
Video Crosspoint Switches
DC ELECTRICAL CHARACTERISTICS(V+ = +5V, V- = -5V, VLOAD= +5V (internal load resistors on), VIN_= VAGND= VDGND= 0, TA= TMINto TMAX, unless otherwisenoted.
Typical values are at TA= +25°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.
Total Supply Voltage (V+ to V-)...........................................+12V
Positive Supply Voltage (V+) Referred to AGND.......-0.3V to +12V
Negative Supply Voltage (V-) Referred to AGND......-12V to +0.3V
DGND to AGND..................................................................±0.3V
Buffer Short Circuit to Ground when
Not Exceeding Package Power Dissipation.............Indefinite
Analog Input Voltage............................(V+ + 0.3V) to (V- - 0.3V)
Digital Input Voltage.............................(V+ + 0.3V) to (V- - 0.3V)
Input Current, Power On or Off
Digital Inputs.................................................................±20mA
Analog Inputs...............................................................±50mA
Continuous Power Dissipation (TA= +70°C)
36-Pin SSOP (derate 11.8mW/°C above +70°C)...........941mW
24-Pin SO (derate 11.8mW/°C above +70°C)................941mW
40-Pin Plastic DIP (derate 11.3mW/°C above +70°C)....889mW
44-Pin PLCC (derate 13.3mW/°C above +70°C).......1066mW
Operating Temperature Ranges
MAX4456C _ _....................................................0°C to +70°C
MAX4_ _ _E_ _.................................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
ABSOLUTE MAXIMUM RATINGS
MAX4359/MAX4360/MAX4456
Low-Cost 4x4, 8x4, 8x8
Video Crosspoint Switches
Note 1:See Dynamic Test Circuits section.
Note 2:3dB typical crosstalk improvement when RS = 0.
Note 3:Input test signal: 3.58MHz sine wave of amplitude 40IRE superimposed on a linear ramp (0 to 100IRE). IRE is a unit of
video-signal amplitude developed by the International Radio Engineers. 140IRE = 1.0V.
Note 4:Guaranteed by design.
SWITCHING CHARACTERISTICS(Figure 4, V+ = +5V, V- = -5V, VLOAD= +5V (internal load resistors on), VIN_= VAGND= VDGND= 0, TA = TMINto TMAX, unless other-
wise noted. Typical values are at TA= +25°C.) (Note 4)
AC ELECTRICAL CHARACTERISTICS(V+ = +5V, V- = -5V, VLOAD= +5V (internal load resistors on), VAGND= VDGND= 0, TA= +25°C, unless otherwise noted.)
MAX4359/MAX4360/MAX4456
Low-Cost 4x4, 8x4, 8x8
Video Crosspoint Switches
Pin Description
MAX4359/MAX4360/MAX4456
Low-Cost 4x4, 8x4, 8x8
Video Crosspoint Switches
Pin Description (continued)
MAX4359/MAX4360/MAX4456
Low-Cost 4x4, 8x4, 8x8
Video Crosspoint Switches
Detailed Description
Output BuffersThe MAX4456 video crosspoint switch consists of 64
T-switches in an 8x8 grid (Figure 1). The eight matrix
outputs are followed by eight wideband buffers opti-
mized for driving 400Ωand 20pF loads. The
MAX4359’s core is a 4x4 switch matrix with each of its
outputs followed by a wideband buffer. The MAX4360
has an 8x4 matrix and four output buffers. Each buffer
has an internal active load on the output that can be
readily shut off through the LOAD input (off when LOAD
= 0V). The shut-off is useful when two or more cross-
points are connected in parallel to create more input
channels. With more input channels, only one set of
buffers can be active and only one set of loads can be
driven. When active, the buffer must have either 1) an
internal load, 2) the internal load of another buffer in
another MAX4359/MAX4360/MAX4456, or 3) an exter-
nal load.
Each output can be disabled under logic control. When
a buffer is disabled, its output enters a high-impedance
state. In multichip parallel applications, the disable
function prevents inactive outputs from loading lines
driven by other devices. Disabling the inactive buffers
reduces power consumption.
The outputs connect easily to MAX497 quad, gain-of-
two buffers when back-terminated 75Ωcoaxial cable
must be driven.
Figure 1. MAX4456 Functional Diagram
MAX4359/MAX4360/MAX4456
Low-Cost 4x4, 8x4, 8x8
Video Crosspoint Switches
Power-On RESETThe MAX4359/MAX4360/MAX4456 have an internal
power-on reset (POR) circuit that remains low for 5µs
after power is applied. POR also remains low if the total
supply voltage is less than 4V. The POR disables all
buffer outputs at power-up, but the switch matrix isnot preset to any initial condition. The desired switch
state should be programmed before the buffer outputs
are enabled.
Digital InterfaceThe desired switch state can be loaded in a parallel-
interface mode or serial-interface mode (Table 3 and
Figures 4, 5, 6). All action associated with the WR line
occurs on its rising edge. The same is true for the
LATCH line if EDGE/LEVEL is high. Otherwise, the sec-
ond-rank registers update while LATCH is low (when
EDGE/LEVEL is low). WR is logically ANDed with CE
and CE (when present) to allow active-high or active-
low chip enable.
6-Bit Parallel-Interface Mode
(MAX4359/MAX4360)In the MAX4359/MAX4360’s parallel-interface mode
(SER/PAR= GND), the six data bits specify an output
channel (A1, A0) and the input channel to which it con-
nects (D3–D0). This data is loaded on the rising edge
of WR. The input channels are selected by codes 0000
through 0111 (D3–D0) for the MAX4360, and codes
0000 through 0011 (D3–D0) for the MAX4359. Note that
the MAX4359 does not use codes 0100 through 0111.
The eight codes 1000 through 1111 control other func-
tions, as listed in Table 1.
7-Bit Parallel-Interface Mode (MAX4456)In the MAX4456’s parallel-interface mode (SER/PAR=
GND), the seven data bits specify an output channel
(A2, A1, A0) and the input channel to which it connects
(D3–D0). This data is loaded on the rising edge of WR.
The input channels are selected by codes 0000
through 0111 (D3–D0) for the MAX4456. The remaining
eight codes 1000 through 1111 control other functions,
as listed in Table 1.
16-Bit Serial-Interface Mode
(MAX4359/MAX4360)In serial mode (SER/PAR= VCC), all first-rank registers
are loaded with data, making it unnecessary to specify
an output address (A1, A0). The input data format is
D3–D0, starting with OUT0 and ending with OUT3 for
16 total bits. For the MAX4360, only codes 0000
through 1010 are valid. For the MAX4359, only the
codes 0000 through 0011 and codes 1000 through
1010 are valid. Code 1010 disables a buffer, while
code 1001 enables it. After data is shifted into the 16-
bit first-rank register, it is transferred to the second rank
by LATCH (Table 2), which updates the switches.
Table 1. Parallel-Interface Mode Functions
MAX4359/MAX4360/MAX4456
Low-Cost 4x4, 8x4, 8x8
Video Crosspoint Switches
32-Bit Serial-Interface Mode (MAX4456)In serial mode (SER/PAR= VCC), all first-rank registers
are loaded with data, making it unnecessary to specify
an output address (A2, A1, A0). The input data format
is D3–D0, starting with OUT0 and ending with OUT7 for
32 total bits. Only codes 0000 through 1010 are valid.
Code 1010 disables a buffer, while code 1001 enables
it. After data is shifted into the 32-bit first-rank register, it
is transferred to the second rank by LATCH (Table 2),
which updates the switches.
Table 3. Input/Output Line ConfigurationsX = Don’t care, H = 5V, L = 0V
( ) are for MAX4456 only.
Table 2. Serial-Interface Mode Functions
