============================
CARTRIDGE BOARD PARTS LIST
============================

Part       Value          Close part #                 Description/important features
-------------------------------------------------------------------------------------------
C1         22pF           C315C220F3G5TA               Ceramic capacitor, 1%, 2.54mm lead spacing
C2         33pF           C315C330F3G5TA               Ceramic capacitor, 1%, 2.54mm lead spacing
C3         100nF          FG18X7R1H104KNT06            MLCC capacitor, 2.54mm lead spacing
C4         33pF           C315C330F3G5TA               Ceramic capacitor, 1%, 2.54mm lead spacing
C5         100nF          FG18X7R1H104KNT06            MLCC capacitor, 2.54mm lead spacing
C6         100nF          FG18X7R1H104KNT06            MLCC capacitor, 2.54mm lead spacing
C7         10pF           C316C100F3G5TA               Ceramic capacitor, 1%, 2.54mm lead spacing
D1         1N751          TZX11B-TR                    Zener diode, 5.1V
FB1        2743002112     4211R-11                     Through-hole ferrite Bead, 8mm length, 135 ohm
IC1        CD74HCT7046A   CD74HCT7046AEE4              Phase-Locked Loop with VCO and Lock Detector
IC2        AD8031N        AD8031ANZ                    Op-amp
IC3        74LS74N        SN74HCT74NE4                 Dual D type positive edge triggered FLIP FLOP, preset and clear
IC4        MAX913CPA      MAX913CPA+                   Voltage comparator
JP1        2x22           70246-4402                   2x22 shrouded, keyed male pin header
R1         10k            MFR-25FRF52-10K              Resistor, 1/4W, 1%, 6.3mm length
R2         10k            MFR-25FRF52-10K              Resistor, 1/4W, 1%, 6.3mm length
R3         10k            MFR-25FRF52-10K              Resistor, 1/4W, 1%, 6.3mm length
R5         33             MFR-25FRF52-33R              Resistor, 1/4W, 1%, 6.3mm length
R6         10k            MFR-25FRF52-10K              Resistor, 1/4W, 1%, 6.3mm length
R7         47k            MFR-25FBF52-47K              Resistor, 1/4W, 1%, 6.3mm length
R8         10k            MFR-25FRF52-10K              Resistor, 1/4W, 1%, 6.3mm length
R9         22k            MFR-25FTF52-22K              Resistor, 1/4W, 1%, 6.3mm length
R10        10k            MFR-25FRF52-10K              Resistor, 1/4W, 1%, 6.3mm length
R11        5.6k           MFR-25FTE52-5K6              Resistor, 1/4W, 1%, 6.3mm length
CABLE      2x22 IDC       IDSD-22-D-03.00-T            2x22 IDC ribbon cable connecting the two boards


Cartridge board notes
-------------------------
1. My IDC ribbon cable is 3" long and keyed.  A 2" cable would probably be ideal but it wasn't available.
   Bear in mind that a keyed cable requires keyed receptacles.

2. The cartridge board serves a very important function: it quadruples the rate of the Intellivision's
   MCLK signal while keeping the result phase-locked.  It passes the result along to the mainboard via
   pin 16.  The incoming MCLK signal from the Intellivision is highly attenuated, and it's important to
   use parts that are in spec for this board to do its job.  Recommend that all passives have a 1%
   tolerance.

3. While it might be tempting to use sockets for the IC's, if they are socketed then a plastic shroud will
   likely not fit around the board.

4. The 100nF capacitors are exactly the same as the ones on the mainboard.  Their sole use is noise
   filtering.

5. The ferrite bead is the same as the ones on the mainboard.  See the mainboard notes for more info on
   the ferrite beads.

6. All capacitors should have 0.1" (2.54mm) lead spacing.




============================
MAINBOARD PARTS LIST
============================

Part       Value          Close part #                 Description/important features
-------------------------------------------------------------------------------------------
C1..C31    100nF          FG18X7R1H104KNT06            MLCC capacitor, 2.54mm lead spacing  (total qty. 30: there is no C20)
CN1                       151-7620E-E                  DC barrel jack, 2mm I.D., 6.3mm O.D.
FB1, FB2   2743002112     4211R-11                     Through-hole ferrite Bead, 8mm length, 135 ohm
SOCKET     Preci-Dip      540-88-032-24-008            PLCC-32 socket for 1k FIFO

IC1        7202J          7202LA20JG                   1k x 9 Asynchronous FIFO, 5V

IC2, IC16, 74ALS04N       SN74ALS04BN                  Hex INVERTER (must be either ALS or HCT type)
IC21

IC3, IC4,  74AS574N       SN74HCT574NE4                8-bit D type FLIP FLOP bus driver
IC17, IC25,
IC30

IC5, IC6,  74LS245N       SN74HCT245NE4                Octal BUS TRANSCEIVER, 3-state
IC8, IC20

IC7, IC10, 74ACT08N       SN74ACT08N                   Quad 2-input AND gate, 5V (must be ACT type)
IC11, IC22,
IC23

IC9, IC12, CD74HC40103    CD74HC40103EE4               High-Speed CMOS Logic 8-Stage Synchronous Down Counter
IC13, IC14

IC15,      74ALS73AN      SN74LS73AN                   Dual J-K FLIP FLOP, clear
IC18, IC24

IC19       CD74HCT4520N   CD4520BEE4                   Dual syncronous binary UP-COUNTER

IC26..IC29 74LVC245N      SN74LVC245ANE4               LOW-VOLTAGE Octal BUS TRANSCEIVER, 3-state

IC31       74HCT00N       SN74HCT00N                   Quad 2-input NAND gate

JP1, JP2   1x20           929850-01-20-RB              1x20 female pin header
JP3        2x6            929852-01-06-RA              2x6 female pin header
JP4        2x22           70246-4402                   2x22 shrouded, keyed male pin header
JP5/JP6    2x22           392-044-558-201              Cartridge edge connector
JP7        1x2            171856-0102                  1x02 male pin header (for optional power LED)
PB1        PUSHBUTTON_6MM SKHLABA010                   Small 2-contact pushbutton (Adafruit sells them in packets of 20)
PWRSUPP    SKM10E-05      SKM10E-05                    MEAN WELL 5V 2A DC-DC Power Converter
Q1         IRF4905        IRF4905PBF                   TO220BH P-Channel HEXFET® Power MOSFET
R1         1M             MFR-25FTE52-1M               Resistor, 1/4W, 1%, 6.3mm length
R2         40k            MFR-12FTF52-40K              Resistor, 1/6W, 1%, 6.3mm length
R3         20k            MFR-25FBF52-20K              Resistor, 1/4W, 1%, 6.3mm length
R4         10k            MFR-25FRF52-10K              Resistor, 1/4W, 1%, 6.3mm length
R5         5k             MFR-25FTE52-4K99             Resistor, 1/4W, 1%, 6.3mm length
R6         2.5k           MFR-25FBF52-2K49             Resistor, 1/4W, 1%, 6.3mm length
R7         1.25k          MFR-25FBF52-1K24             Resistor, 1/4W, 1%, 6.3mm length
R8         625            MFR-25FRF52-620R             Resistor, 1/4W, 1%, 6.3mm length
R9         312            MFR-25FRF52-309R             Resistor, 1/4W, 1%, 6.3mm length
R10        3.9k           MFR-25FBF52-3K9              Resistor, 1/4W, 1%, 6.3mm length

R11,       1k             MFR-25FRE52-1K               Resistor, 1/4W, 1%, 6.3mm length
R15..R17

R12        470            MFR-25FTE52-470R             Resistor, 1/4W, 1%, 6.3mm length
R13, R14   820            MFR-25FBF52-820R             Resistor, 1/4W, 1%, 6.3mm length

X1         DSUB25-F       09663526611                  Female D-Sub-25 right-angle parallel port connector


Mainboard notes
-------------------------
1.  For resistors, any 1/4W 1% tolerance resistor that's 6.3mm or less will do.  It's okay to use a 1/6W
    resistor for the 40k one as it's only in the resistor ladder for the output video.

2.  For the 1M resistor, the board will accommodate a larger 1/2W one but it isn't necessary.

3.  All capacitors are the same, 100nF, with 0.1" (2.54mm) lead spacing.

4.  For chips, generally speaking, try to use remain compatible with TTL logic levels if possible.  It is
    also very important to use HCT variants for certain chips.

5.  It is ***CRITICAL*** to use LVC (low-voltage) variants for IC26-IC29.  They translate 5V logic levels
    to 3.3V for the Raspberry Pi Pico.  Not using LVC chips absolutely WILL fry either the Pico or IC26-IC29.

6.  The MEAN WELL switching power supply has an upper limit of 9 volts input.  Recommended DC power supply
    is 6V 2A.  The barrel jack from the wall-wart power supply must be center-positive.

7.  The hardest part to acquire by far is the cartridge connector.

8.  PB1 is a reset button for the Raspberry Pi Pico.  It isn't strictly necessary.

9.  JP7 is a locking header for an optional power LED.

10. JP3 is a header for possible expansion.  It provides the digital video levels just before they are
    converted to analog.  A potential use is conversion to DVI/HDMI.

11. The ferrite beads I have are Fair-Rite 2743002112 through-hole axial beads, with an approximate
    length of 8mm and 135-ohm impedance.  The impedance value was not specifically chosen, it's just
    what looked okay and they do a good (and important) job of removing noise from the power rails.
    Try to use something similar in size and impedance.

12. Recommend using sockets for all chips.  It's cheap insurance.

13. You also need a Raspberry Pi Pico and headers for it, of course. It plugs into JP1 and JP2.
    DO NOT use its castellated holes to solder it directly to the mainboard or (a) its ability to cool
    itself will suffer, (b) you won't be able to plug your USB cable into it to load the software,
    and (c) it will probably short against the vias under it.
