The Hardware Pages
Motorola MC1377P

Last updated on August the 16th, 2000.

  • Schematics:

  • Here are the VGATV schematics I've drawn recently.

    You have a choice of 3 formats: the original Tango-Schematic 1.20 S01 file, in a ZIP (since GeoCities doesn't like .S01), in PostScript format and as GIF file, whose thumbnail is found below. The image itself is much bigger.

    As a bonus, I found that adding SVHS output was very easy, so I did!

  • Printed Circuit Board:

      None yet.

  • Part List:

    - Components needed:

      1 Metal box
      1 DC socket, male
      1 PCB
      2 switches/jumpers

      CONN1 = Mini DB15P socket, female
      CONN2,
      CONN3 = RCA socket. female
      DL1 = 300ns Philips delay line. Motorola asks for a 400ns, and "Radio Plans" magazine uses a 470ns delay line in their schematic. I guess you should use whatever you get...
      Q1,
      Q2,
      Q3 = BC547
      U1 = Motorola MC1377P
      U2 = 7805, voltage regulator
      VC1 = 25pF, variable capacitor. Doesn't need to be exactly this value.
      VR1 = 47K, variable resistor
      X1 = 4.43Mhz crystal (PAL), 3.58Mhz (NTSC)
      XFMRI1 = Chroma bandpass transformer

      R1,
      R2,
      R7 = 1.8K ohm
      R3 = 2.7K ohm
      R4,
      R5,
      R6 = 47 ohm
      R8,
      R9,
      R10,
      R13,
      R16 = 75 ohm
      R11 = 33K ohm
      R12 = 220 ohm
      R14 = 3.3K ohm
      R15,
      R17 = 1K ohm
      R18 = 16K ohm
      R19 = 33 ohm
      R20 = 8.2K ohm
      R21 = 6.8K ohm

      C1,
      C2 = 10uF, 16V
      C3,
      C12,
      C13,
      C14 = 100nF
      C4,
      C5,
      C6 = 22uF
      C7,
      C17 = 1nF
      C8 = 10nF
      C9,
      C10 = 180pF
      C11 = 12pF
      C15 = 33pF (PAL), 47pF (NTSC)
      C16 = 10nF
      C18 = 62pF (PAL), 100pF (NTSC)
      C19 = 1uF

      You can also get the file version, if you want to.

      Below is a picture of my delay line and the chroma bandpass transformer, having the MC1377 below for size comparison.