MAX4359EWG+ Maxim Integrated Products, MAX4359EWG+ Datasheet - Page 6

• Manufacturer Part Number: MAX4359EWG+
• Description: IC VIDEO CROSSPOINT SWIT 24SOIC
• Manufacturer: Maxim Integrated Products

Specifications of MAX4359EWG+

• Function: Video Crosspoint Switch
• Circuit: 1 x 4:4
• Voltage Supply Source: Dual Supply
• Voltage - Supply, Single/dual (±): ±4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (0.300", 7.50mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low-Cost 4x4, 8x4, 8x8
Video Crosspoint Switches
The 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 400Ω and 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
Figure 1. MAX4456 Functional Diagram
6
_______________________________________________________________________________________
IN0
SER/PAR
Detailed Description
IN1
IN2
A0
A1
IN3
Output Buffers
D0/SER IN
MAX4456
SWITCH
MATRIX
A2
8x8
IN4
2nd-RANK REGISTERS
1st-RANK REGISTERS
D1/SER OUT
IN5
D2
IN6
D3
IN7
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 MAX4395 quad, opera-
tional amplifiers when back-terminated 75Ω coaxial
cable must be driven.
V+
V- AGND DGND
BUFFERS
OUTPUT
A = +1
A = +1
LATCH
EDGE/LEVEL
WR
CE
CE
400Ω
400Ω
OUT0
LOAD
OUT7