LMH6586 Datasheet, PDF (1/33 Pages) National Semiconductor (TI) – 32x16 Video Crosspoint Switch

LMH6586
www.ti.com
SNCS105D – JULY 2008 – REVISED MARCH 2013
LMH6586 32x16 Video Crosspoint Switch
Check for Samples: LMH6586
FEATURES
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•2 32 Inputs and 16 Outputs
• AC-Coupled Inputs with Integrated DC Restore
Clamp
• Individually Addressable Outputs
• Pin-Selectable Output Buffer Gain (1 V/V or 2
V/V)
• –3 dB Bandwidth = 66 MHz
• DG = 0.05%, DP = 0.05° @ R_L = 150Ω, A_V = 2V/V
• −70 dB Off-Isolation @ 6 MHz
• Individual Input and Output Shutdown Modes
• Device Power Down Mode
• Video Detection with Programmable Threshold
(8 Levels)
• Sync Detection with Pin-Configurable
Threshold
• 100 kHz I²C Interface with 2-Bit Configurable
Slave Address
• Single 5V Supply Operation
• Extra Video Output (VOUT_16) for External
Video Sync Separator
APPLICATIONS
• CCTV Security and Surveillance Systems
• Analog Video Routing
DESCRIPTION
The LMH6586 is a non-blocking analog video
crosspoint switch designed for routing standard
NTSC or PAL composite video signals. The non-
blocking architecture allows any of the 32 inputs to be
connected to any of the 16 outputs, including any
input that is already connected. Each input has an
integrated DC restore clamp for biasing of the AC-
coupled video signal. The output buffers have a
common selectable gain setting of 1X or 2X and can
drive loads of 150Ω.
The LMH6586 features two types of input signal
detection for convenient monitoring of activity on any
input channel. Video detection can be configured to
indicate when either “presence of video” or “loss of
video” is detected across the video threshold level
controlled by a programmable register. Additionally,
sync detection can be configured to indicate when
“loss of sync” is detected across the sync threshold
level controlled by a DC voltage input.
The switch configuration and other parameters are
programmable via the I²C bus interface. The slave
device address is configurable via two external pins
allowing up to four LMH6586 devices, each with a
unique address, on a common I²C bus. This helps
facilitate expansion of the crosspoint matrix array size
(e.g. 64 x 16). The LMH6586 operates from a
common single 5V supply for its analog sections as
well as its control logic and I²C interface. The
LMH6586 is offered in a space-saving 80-pin TQFP.
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PRODUCTION DATA information is current as of publication date.
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