Description
The NTE867 is a linear inetgrated circuit that has three major sections for interfacing television tuning systems: an input op−amp, a band−select switch, and an internally referenced quad−comparator. The op−amp output voltage has a wide dynamic range with a 3mA source or sink capability and can be clamped to three discrete levels in response to logic inputs. The op−amp also has internal bias reference and phase compensation. High impedance PMOS input transistors are protected by input limiting diode clippers.
The band−select switch has two logic inputs controlling four outputs: VHF B+, VHF HIGH, SUPERBAND CATV, and UHF B+. The VHF B+ and UHF B+ outputs are current sources which are short−circuit protected by current limiting. VHF HIGH and SUPERBAND CATV outputs are current sinks with low off−state leakage. The quad comparator features internal reference bias, low output leakage, and a 6mA current sinking capability. The outputs of two of the comparators are internally connected to form a window comparator.

Features
* Input op−amp: high impedance PMOS input transistors and internal reference bias
* Low input bias current and internal diode protection at op−amp inputs
* High op−amp output voltage swing (0.7−28.0V) with 3mA source sink capability
* Three op−amp output voltage logic−controlled clamp levels
* Logic−controlled bandswitching with four seperate outputs
* Two bandswitch output current sinks
* Two bandswitch current−limited output current sources
* Internally referenced quad comparator
* Low drive current input requirement
* Low output leakage
* High output current sink capability
* Bipolar and PMOS processes on a single chip

TAG BiMOS

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Features
• 5 Multiplex Video Channels
- 1 Independent Channel
- 4 Channels with Enable
• 4 LED Channel Indicator Outputs
• Wideband Video Amplifier . . . . . . . . 25MHz Unity Gain
• Adjustable Video Amplifier Gain
• High Signal-Drive Capability

Applications
• Video Multiplex Switch
• 75W Video Amplifier/Line Driver
• Video Signal-Level Control
• Monitor Switching Control
• TV/CATV Audio/Video Switch
• Video Signal Adder/Fader Control

Description
 The CA3256 BiMOS analog video switch has five channels of CMOS multiplex switching for general-purpose videosignal control. One of four CMOS channels may be selected in parallel with channel 5. The CMOS switches are inputs to the video amplifier but may be used in bilateral switching between channels 1 to 4 and channel 5. The analog switches of channels 1 to 4 are digitally controlled with logic level conversion and binary decoding to select 1 of 4
channels.

 The enable function controls channels 1 to 4 but does not affect channel 5. LED output drivers are selected with the channel 1-to-4 switch selection to indicate the ONchannel. Channel 5 may be used as a monitor output for data or signal information on channels 1 to 4. The transmission gate switches shown in the block diagram of the CA3256 are configured in a “T” design to minimize feedthrough. When the switch is off, the shunt or center of the “T” is grounded.

 The amplifier has high input impedance to minimize the RON transmission gate insertion loss. The amplifier output impedance is typically 5W in a complementary symmetry output. The amplifier can directly drive a nominal 75W coaxial cable to provide line-to-line video switching. The gain of the amplifier is programmable by different feedback resistor values between pins 8 and 9. Compensation may also be used between these pins for an optimally flat frequency response.
 An internal regulated 5V bias reference with temperature compensation permits stable direct-coupled output drive and minimizes DC offset during signal switching.

CA3256E
CA3256M

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