SCRAM 500 8M RAM SCSI INTERFACE Revised: October 31, 1991
EXPS-A500-SCRAM500/1 Revision: 2
Bill Of Materials May 10, 1992 23:33:01 Page 1
Qty Reference Part Description Part # (typ)
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1 SCRAM 500 Main PCB DS PTH MMT-SC500-PCB
1 CASE Case (extruded aluminum) MMT-SC500-CASE
1 PNL-FRNT Front panel with mounting MMT-SC500-CASE
1 PNL-BACK Back panel cut for DB25 & switch MMT-SC500-CASE
1 NUTS&BOLTS Hardware kit for metalwork MMT-SC500-CASE
1 EXTENDER Extender PCB MMT-SC500-EXT
1 TERM-8 10K SIP 8 Pin Bus termination MMT-SC500-EXT
2 TERM-6 10K SIP 6 Pin Bus termination MMT-SC500-EXT
1 RFI SHIELD Metal sleeve to enclose extender MMT-SC500-RFI
2 J1 86PIN Edge Connector (with lugs) JDR 86P-ST
1 SW1 Mini SPDT RA Toggle PCB MOUNT C&K
1 CN1 DB25 RA Socket JDR DB25SRS
1 D1 3mm RED LED JDR LED-MR
1 D2 3mm GREEN LED JDR LED-MG
1 D3 3mm YELLOW LED JDR LED-MY
4 JP1-JP3,JP5 JUMPER pin 1X2 JDR HDR-40
4 JP1-JP3,JP5 SHORTING BLOCK JDR JUMPER
16 C1-C16 0.1uF Bypass Capacitor JDR .1UF-MONO
2 C21,C22 47uF 25V Electrolytic JDR 47R35
3 R1,R2,R3 470 ohm 1/4 Watt JDR R-470
1 R4 4R7 ohm 1/2 Watt JDR R-4R7
1 RN1 4K7 SIP 10pin JDR RPS9-4K7
1 RN2 1K0 SIP 10pin JDR RPS9-1K0
3 RP1,RP2,RP3 220/330 SIP 8pin AB-08E221331
16 U1-U16 20 Pin ZIP IC Socket JDR SIP-SOCKET
1 U17 74LS32 (74HCT32) JDR 74LS32
1 U18 74F86 JDR 74F86
1 U19 74F521 JDR 74F521
3 U20,U21,U22 74LS257 JDR 74LS257
4 U23,U25,U27,U28 20 pin IC Socket JDR 20 PIN ST
1 U23 "Bertie" AutoConfig Sequencer MMT-BERT-GAL
1 U25 "Griswold" DRAM Timing Controller MMT-GRIS-GAL
1 U27 "Humphrey" DRAM Address Decoder MMT-HUMP-GAL
1 U28 "Cyril 8" 8 Bit SCSI Adapter MMT-CYRL-GAL
1 U24 74LS373 (74HCT373) JDR 74LS373
1 U26 74LS393 (74HCT393) JDR 74LS393
1 U29 28 Pin IC Socket JDR 28 PIN ST
1 U29 27C64 64K AutoBoot ROM MMT-SCRAM8-V1.0
1 U30 44 Pin PLCC Socket JDR PLCC44
1 U30 DP8490V Enhanced SCSI Controller NAT SEMI
PLCC plastic