
General Description
The 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
400
and 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
High-Speed Signal
Routing
Video-On-Demand
Systems
Features
o
Eight (MAX4456) or Four (MAX4359/MAX4360)
Internal Buffers
250V/μs Slew Rate
Three-State Output Capability
Power-Saving Disable Feature
65MHz -3dB Bandwidth
o
Routes Any Input Channel to Any Output Channel
o
Serial or Parallel Digital Interface
o
Expandable for Larger Switch Matrices
o
80dB All-Channel Off-Isolation at 5MHz
o
70dB Single-Channel Crosstalk
o
Straight-Through Pinouts Simplify Layout
o
Low-Cost Pin-Compatible Alternative to
MAX456 (MAX4456)
M
Low-Cost 4x4, 8x4, 8x8
Video Crosspoint Switches
________________________________________________________________
Maxim Integrated Products
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.
1
OUTPUT
SELECT
4x4
(8x4)
T-SWITCH
MATRIX
A
V
= +2
4 INPUT CHANNELS
(8 INPUT CHANNELS)
A1
A0
D3
D2
D1/SER OUT
D0/SER IN
INPUT
SELECT
OR
SERIAL
I/O
MAX4359
(MAX4360)
LATCH
WR
75
75
Z
0
= 75
Z
0
= 75
(MAX4360)
OUTPUT
SELECT
8x8
T-SWITCH
MATRIX
A
V
= +2
A2
A1
A0
8 INPUT CHANNELS
D3
D2
D1/SER OUT
D0/SER IN
INPUT
SELECT
OR
SERIAL
I/O
MAX4456
LATCH
WR
75
75
MAX497
A
V
= +2
_________________________________________________
Typical Application Circuits
19-1389; Rev 1; 12/99
Video Test Equipment
Video Conferencing
Security Systems
Ordering Information
Pin Configurations appear at end of data sheet.
MAX4456EQH
-40°C to +85°C
44 PLCC
MAX4456EPL
-40°C to +85°C
40 Plastic DIP
MAX4456
CPL
MAX4456CQH
0°C to +70°C
0°C to +70°C
40 Plastic DIP
44 PLCC
MAX4360
EAX
-40°C to +85°C
36 SSOP
MAX4359
EAX
MAX4359EWG
-40°C to +85°C
-40°C to +85°C
36 SSOP
24 SO
PART
TEMP. RANGE
PIN-PACKAGE