Skip to main content
1562B - Block Diagram
1562B - Pinout


User Programmable Differential Output Graphics Clock Generator

The 1562B is a very high performance monolithic phaselocked loop (PLL) frequency synthesizer. Utilizing ICS’s advanced CMOS mixed-mode technology, the 1562B provides a low cost solution for high-end video clock generation. The 1562B has differential video clock outputs (CLK+ and CLK-) that are compatible with industry standard video DAC. Another clock output, LOAD, is provided whose frequency is derived from the main clock by a programmable divider. An additional clock output is available, LD/N2, which is derived from the LOAD frequency and whose modulus may also be programmed. Operating frequencies are fully programmable with direct control provided for reference divider, prescaler, feedback divider and post-scaler. Reset of the pipeline delay on Brooktree RAMDAC?s may be performed under register control. Outputs may also be set to desired states to facilitate circuit board testing.


  • Two programming options: ICS1562B-001 (Parallel Programming) ICS1562B-201 (Serial Programming)
  • Supports high-resolution graphics - CLK output to 260 MHz, with 400 MHz options available
  • Eliminates need for multiple ECL output crystal oscillators
  • Fully programmable synthesizer capability - not just clock multiplier
  • Circuitry included for reset of Brooktree RAMDAC pipeline delay
  • VRAM shift clock generation capability (-201 option only)
  • External feedback loop capability (-201 option only)
  • Compact - 16-pin 0.150” skinny SOIC package
  • Fully backward compatible to ICS1562

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Voltage (V)
3PECL, CMOS, LVCMOS5.000000 - 260.000000, 0.000000 - 260.0000005.000000 - 20.000000, 20.000000 - 0.0000001Crystal355

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
1562BM-001ObsoleteDC16SOIC16CNoTubeCheck Availability
1562BM-201ObsoleteDC16SOIC16CNoTubeCheck Availability
1562BM-201LFObsoleteDCG16SOIC16CYesTubeCheck Availability
1562BM-201LFTObsoleteDCG16SOIC16CYesReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
1562B DATASHEET Datasheet PDF 290 KB May 14, 2010
PCN# : A1305-01 Gold Wire to Copper Wire Product Change Notice PDF 148 KB Jul 29, 2013
1562B DOS Register Editor Misc ZIP 23 KB Oct 13, 2006