CA3256 overview

CA3256 is a component documented by Harris Corporation. The PDF description identifies it as "25MHz, BiMOS Analog Video Switch and Amplifier." This guide condenses the most useful engineering information from the available PDF so that designers and sourcing teams can identify the checks that still need confirmation in the original document.

Datasheet snapshot

  • Manufacturer: Harris Corporation
  • Part number: CA3256
  • Category: IC
  • Datasheet length: 11 Pages

Key features noted in the PDF

  • 5 Multiplex Video Channels - 1 Independent Channel - 4 Channels with Enable
  • 4 LED Channel Indicator Outputs
  • Adjustable Video Amplifier Gain
  • High Signal-Drive Capability

Applications listed in the PDF

  • Video Multiplex Switch
  • 7 5Ω Video Amplifier/Line Driver
  • Video Signal-Level Control
  • Monitor Switching Control
  • TV/CATV Audio/Video Switch
  • Video Signal Adder/Fader Control

Specifications and operating details

The following points were extracted from the PDF text. Check the associated conditions, notes and limits in the complete document before using a value in a design.

  • The amplifier output imped- ance is typically 5Ω in a complementary symmetry output.
  • The amplifier can directly drive a nominal 75Ω coaxial cable to provide line-to-line video switching.
  • 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.
  • Electrical SpecificationsTA = 25oC, V+ = 12V; V- = GND PARAMETER SYMBOL TYPICAL VALUES UNITS Power Supply Voltage V+ to V- 10 to 17 V Power Supply Current I CC 20 mA SWITCH AMPLIFIER Open Loop Gain A OL -3 5 d B Programmable Gain, FB Adjust.
  • CA3256 Electrical SpecificationsTA = 25oC, V+ = 12V, VLED = 12V, V- = GND, Pin 4 = GND, Feedback Switch Closed, VHIGH = 9V, VLOW = 3V (See Figure 1), Unless Otherwise Specified PARAMETERS INPUTS CHANNEL SWITCH CONTROL MIN TYP MAX UNITS CH 1.
  • The output of the five switches is made common and fed into the input of a bipolar CONTROL INPUTS (CHANNEL SELECT) +12 V 10K 10K OUTPUT AMP FEEDBACK FEEDBACK SWITCH AMP OUT 1.1K 1.1K 1.1K 1.1K +12 V LLC ENABLE AND CHAN 1-4 SELECT TG-1 TG-2.

Topics covered by the datasheet

The document includes sections related to:

  • Features
  • Applications
  • Description
  • Application Information

Engineering review checklist

  • Check resistance value, tolerance, temperature coefficient and long-term stability over the operating range.
  • Derate continuous power for ambient temperature and verify pulse or surge capability separately.
  • Match the land pattern, termination finish and current-sense routing to the exact package option.

Always confirm values against the latest manufacturer-controlled datasheet, especially when qualifying a substitute or releasing a production BOM.

View the complete PDF and model record

Open the CA3256 datasheet and model details to review the complete PDF, document pages and available product information.

Source attribution

Adapted from the PDF associated with this DigiCamel model page.

Source model URL: https://www.digicamel.com/product.php?slug=ca3256-harris-corporation

CA3256 Harris Corporation IC CA3256 datasheet CA3256 specifications CA3256 applications