Elf 2000 Main Board Parts List

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Elf 2000
Elf 2000 Main Board Parts List
Ref/Desig Manuf. P/N Vendor Stock # Description
      RESISTORS
R1, R5, R6, R7, R8 common 330 ohm 1/8W 5% carbon resistor
R2 common 1K ohm 1/8W 5% carbon resistor
R3 common 200 ohm 1/8W 5% carbon resistor
R4 common 3.3K ohm 1/8W 5% carbon resistor
RP1, RP3 JameCo 24643 10K x 9 10 pin SIP
RP2 JameCo 856909 10K x 7 8 pin SIP
RP4 JameCo 771681 10K x 5 6 pin SIP
      CAPACITORS
C1 JameCo 30017 1000uF 16V radial lead aluminum electrolytic capacitor
C2 JameCo 33689 10uF 6V tantalum capacitor
C3 - - - - unused
C4-C24 JameCo 332672 0.1uF ceramic monolithic bypass capacitor (0.1" LS)
      SEMICONDUCTORS
D2, D3, D4, D6 1N914 JameCo 36311 Small signal switching diode
D5 1N4001 JameCo 35975 50PIV 1A power diode
D1 unused
VR1 7805 JameCo 51262 5.0V fixed output TO-220 regulator
U1 Intersil CDP1802ACD3 8 bit microprocessor
U2 RCA CDP1861D video co-processor (hard-to-find item – see STG1861 Parts List)
U3 STG 27C256 STG 32K 8 bit EPROM
U4 Hitachi HM62256LP JameCo 42892 32K 8 bit low power SRAM 150ns
U5 Dallas DS1210 JameCo 114198 Nonvolatile SRAM controller
U6 74HC373 JDR 74HC373 Octal D Latches
U7 Atmel ATF22V10CQZ STG Flash GAL (quarter power)
U8 74HC04 JDR 74HC04 Hex inverter
U9 CD4044 JameCo 13004 Quad S-R Latches
U10 74HC74 JDR 74HC74 Dual D Flip Flop
U11 - - - - unused
U12, U13, U14 74HC244 JDR 74HC244 Dual Quad Buffer
U15 Dallas DS1233 Digi-Key DS1233-10+-ND 5V 10% TO-92 EconoReset (Don’t use the DS1233M!)
U16 Dallas DS275  ? RS-232 transceiver (2011 — hard-to-find part – see/search: [1] or [2])
DISP1-6 TIL311  ? LED Hexadecimal Display (2011 — hard-to-find part – see/search: [3])
LED1-5 JDR LED101 Red T1 LEDs
OSC1 ECS 2100A-035 Mouser 520-TCH357-X 3.579545Mhz DIP8 crystal oscillator
      MISCELLANEOUS
B1 CR1225 Mouser 614-CR1225 Lithium coin cell
BH1225 Digi-Key 500K-ND CR1225 coin cell holder
PB1 Panasonic EVQ-PAD05R Digi-Key P10890S-ND PCB mount push button switch
S1 C&K T101MH9ABE Digi-key CKN1067-ND SPDT Tiny Toggle Switch, PCB Mount Right Angle
J1 PJRAN1X1U04X Mouser 502-PJRAN1X1U04X PCB mount phono jack (Video)
J2 Cui-Stack PJ-102AH Digi-Key CP-102AH-ND high current coaxial power jack (2.1 x 5.5mm)
J3 CommConn 1184-24G2  ? 24 pin dual row stacking header
J4  ? PCB mount DB9F
J5 JameCo 53480 20 pin 0.1" dual row header
JDR MPSOC-08 DIP8 machined pin IC socket
Digi-Key A463-ND DIP8 machined pin oscillator socket
JDR MPSOC-14 DIP14 machined pin IC socket
JDR MPSOC-16 DIP16 machined pin IC socket
JDR MPSOC-20 DIP20 machined pin IC socket (0.300")
JameCo 39386 DIP24 machined pin IC socket (0.300")
JameCo 39351 DIP24 machined pin IC socket (0.600")
JDR MPSOC-28 DIP28 machined pin IC socket (0.600")
JDR MPSOC-40 DIP40 machined pin IC socket
 ? #4-40 mounting hardware for VR1
JDR HS507302B Heat sink for VR1
STG ELF2K-1C STG Printed circuit board

NOTE: The following items are hard-to-find parts as of 2011.
Check the sources given.
    • U16 – Dallas – DS275 – RS-232 transceiver – www.futurlec.com or www.componentsdirect.com
    • DISP1-6 – TIL311 – LED Hexadecimal Display – www.utsource.net
      (also note that the hexadecimal displays are optional – you may use none, or only two for data)

Elf 2K Parts Lists and Suppliers

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