Keithley 2500 Service Manual

Model 2500 Service Manual Replaceable Parts 6-7
U120 PROGRAMMED ROM 2500-800*
U121 PROGRAMMED ROM 2500-801*
U150 64K BIT SERIAL FRAM IC-1381
U154,U161 IC, 2 INPUT NAND GATE, NC7S00 IC-1181
U155 IC, OCT BFR/LINE DRIVE, 74HCT244 IC-651
U159,U165 IC, POS NAND GATES/INVERT,
74HCT14
IC-656
U160,U162 IC, 256K X 16 BIT CMOS RAM 17NS LSI-249-1
U163 IC, 32-BIT MICROCONTROLLER
20MHZ
LSI-203-20
U164 IC, PROTECTED QUAD POWER
DRIVERS
IC-1212
U166 IC, +5V RS-232 TRANSCEIVER,
MAX202
IC-952
U167 IC, GPIB ADAPTER, 9914A LSI-123
U169 IC, OCTAL INTER BUS TRANS, 75161 IC-647
U170 IC, OCTAL INTERFACE BUS, 75160 IC-646
U171 IC, 2-INPUT OR GATE IC-1206
U301,U501 IC, +5V VOLTAGE REGULATOR,
LM2940CT
IC-576
U302,U502 IC, POS VOLTAGE REG +15V, 60MA,
LM2940CT-15
IC-1186
U303,U503 IC, NEG VOLTAGE REG -15V, 50MA,
LM2990T-15
IC-1187
U304,U305,U504,U505 IC, OPTOCOUPLER, 2611 IC-690
U308,U508 IC, CMOS ANALOG SWITCH IC-1395
U309,U509 IC, +5V 16 BIT DAC, MAX542ACSD IC-1176
U310,U510 IC, VOLTAGE REFERENCE IC-1065
U312,U512 IC, DIFFERENTIAL AMP, INA117P IC-889
U313,U513 IC, DUAL OP-AMP, LF353M IC-842
U314,U514 IC, OP AMP, LOW POWER AD795JR IC-1052
U315,U316,U515,U516 IC, 8 STAGE SHIFT C074HC409AM IC-1026
U317,U517 IC, 8-CHAN ANA MULTIPLEXER,
DG408DY
IC-844
U318,U518 IC, OP-AMP, LOW NOISE LT1007CS8 IC-949
U319,U519 IC, QUAD D FLIP FLOP W/CLK, RESET
74HC175
IC-923
U320,U321,U520,U521 IC, QUAD 2 IN NOR, 74HCT02 IC-809
U322,U522 IC, NCHAN LAT DMOS QUADFET,
SD5400CY
IC-893
U323,U523,U311,U511 IC, OPA177GS IC-960
Table 6-1 (cont.)
Mother board parts list
Circuit designation Description
Keithley
part no.

Keithley 2500 Specifications

General

Brand	Keithley
Model	2500
Category	Measuring Instruments
Language	English