19-1389; Rev 1; 12/99
Low-Cost 4x4, 8x4, 8x8
Video Crosspoint Switches
General Description
Features
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
400Ω 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.
ꢀ Eight (MAX4456) or Four (MAX4359/MAX4360)
Internal Buffers
250V/µs Slew Rate
Three-State Output Capability
Power-Saving Disable Feature
65MHz -3dB Bandwidth
ꢀ Routes Any Input Channel to Any Output Channel
ꢀ Serial or Parallel Digital Interface
ꢀ Expandable for Larger Switch Matrices
ꢀ 80dB All-Channel Off-Isolation at 5MHz
ꢀ 70dB Single-Channel Crosstalk
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.
ꢀ Straight-Through Pinouts Simplify Layout
ꢀ Low-Cost Pin-Compatible Alternative to
MAX456 (MAX4456)
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.
Ordering Information
PART
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
PIN-PACKAGE
36 SSOP
MAX4359EAX
MAX4359EWG
MAX4360EAX
MAX4456CPL
MAX4456CQH
MAX4456EPL
MAX4456EQH
24 SO
36 SSOP
40 Plastic DIP
44 PLCC
0°C to +70°C
________________________Applications
-40°C to +85°C
-40°C to +85°C
40 Plastic DIP
44 PLCC
High-Speed Signal
Video Test Equipment
Video Conferencing
Security Systems
Routing
Pin Configurations appear at end of data sheet.
Video-On-Demand
Systems
_________________________________________________Typical Application Circuits
8 INPUT CHANNELS
4 INPUT CHANNELS
(8 INPUT CHANNELS)
MAX497
= +2
(MAX4360)
A
Z = 75Ω
0
V
75Ω
MAX497
= +2
WR
LATCH
A
V
Z = 75Ω
0
75Ω
WR
LATCH
75Ω
MAX4456
75Ω
MAX4359
(MAX4360)
A2
A1
A0
OUTPUT
SELECT
A1
A0
OUTPUT
SELECT
8x8
T-SWITCH
MATRIX
4x4
(8x4)
T-SWITCH
MATRIX
INPUT
SELECT
OR
SERIAL
I/O
D3
D2
INPUT
SELECT
OR
SERIAL
I/O
D3
D2
D1/SER OUT
D0/SER IN
D1/SER OUT
D0/SER IN
A
= +2
V
MAX497
________________________________________________________________ Maxim Integrated Products
1
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.