Keithley SourceMeter 3A 2420 Service Manual page 99

6-16 Replaceable Parts
Table 6-2 (cont.)
Digital board parts list
Circuit designation
U2
U20
U21
U22
U23,25
U24
U26
U3
U4
U5
U6
U7
U8
U9
VR1
Y1
* Order current firmware revision level.
Description
IC, MICROMANAGER, DS12365-10
IC,OCTAL INTERFACE BUS,75160
IC, DUAL POWER MOSFET DRIVER,
TSC426
IC, DUAL D-TYPE F/F, 74HC74
IC,POS NAND GATES/INVERT,74HCT14
IC,TRIPLE 3 IN NAND,74F10
IC, VOLTAGE REGULATOR, LM340-12
MICROCONTROLLER, MC68332-FC
IC +5V RS-232 TRANSCEIVER, MAX202 IC-952
IC, OP-AMP, AD705JR
IC,OCTAL INTER BUS TRANS,75161
IC, 4-CHANNEL PWR DRIVER, 2549B
INTEGRATED CIRCUIT
IC, HEX INVERTERS, 74HCT04
DIODE, ZENER 33V, IN4752A
CRYSTAL, FSM327
Keithley
part no.
IC-884
IC-646
IC-437
IC-773
IC-656
IC-659
IC-60
LSI-161
IC-814
IC-647
IC-1044
IC-1113
IC-880
DZ-68
CR-41