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6-83
Table 6-26. A20 CPU PCA (cont)
Ref Des Description Part
Number
Qty
U19 IC,MEMORY,SRAM,7C1021,1MB,64KX16,5V,15NS,TSOP44,TAPE 1609432 1
U25, U27-29 CMOS 74HCT244 SMR,IC,CMOS,OCTL LINE DRVR,SOIC 742593 4
U26, U30 CMOS 74HCT245 SMR,IC,CMOS,OCTAL BUS TRANSCEIVER,SOIC 742577 2
U31 CMOS 68C681 SM,IC,CMOS,DUAL CHANNEL UART,PLCC 866785 1
U32 IC, LOGIC, DS75451, 5.0V, SERIES DUAL PERIPHERAL DRIVERS, SOIC8, TAPE 1589055 1
U33 IC,REAL TIME CLOCK-CALENDAR,ICM7170,5V,PARALLEL,ALARM,SO24,TAPE 1588991 1
U52 BIPOLAR LM324 SMR,IC,OP AMP,QUAD,LOW POWER,SOIC 742569 1
XBT1 CONNECTOR,HOLDER,BATTERY,2450 COIN,SURFACE MOUNT,TAPE 1588957 1
Y1 CRYSTAL,7.3728MHZ,50/100PPM,20PF,PLASTIC ENCAPSULATED,SMD,TAPE 106648 1
Y3 CRYSTAL SMR,CRYSTAL,32.768KHZ,20PPM,SURFACE MT 106754 1
Z1 RESISTOR NETWORK,CERMET,BUSSED,15 RES,16 TERM,3.3K,+-
5%,0.125W,200PPM,4012,TAPE
1589028 1
Z2-3 RESISTOR SMR,RES,CERM,SOIC,16 PIN,15 RES,4.7K,+-2% 838060 2
Z5 RESISTOR SMR,RES,CERM,SOIC,16 PIN,15 RES,100K,+-2% 910745 1
Note 1:
For 5700A, order pn 1608184 for U15.
For 5720A, order pn 1619757 for U15.