DATAMATH PICTURES

This HP-45 Advanced Scientific Calculator was manufactured in December 1973 by
Hewlett Packard in the United States (Date code 1350A » wk 50 yr 1973).

The Main printed circuit board (PCB) of the featured HP-45 is centered around the HP 1820-0078 Control and Timing Chip, the
HP 1818-0078 Arithmetic and Register Chip, two HP 1818-0057 and -0082 ROM Chips with a capacity of 256*10 bits, each
and a HP 1820-0993 RAM Chip in white ceramic packages supported by a HP Clock Driver and power supply.

The Display and Keyboard PCB of the HP-45 with two display drivers and three
7-segment LED-Display Modules with 5 digits, each.

Close-up view of the HP 1820-1169 Arithmetic and Register Chip, here manufactured by Mostek and marked as MK6020P.

Close-up view of the HP 1818-0078 Control and Timing Chip, here manufactured by AMI.

Close-up view of the two HP 1818-0057 and HP 818-0082 ROMs, here manufactured by AMI.

Close-up view of the HP 1820-0993 RAM, here manufactured by Mostek and marked as MK6036P.

Close-up view of the HP 1820-1128 Clock Driver and Reset Chip.

Close-up view of three HP 1990-0335 5-digit 7-Segment LED Modules .

Close-up view of the HP 1820-1029 Anode Driver and System Clock Chip.

Close-up view of the HP 1820-1226 Display Scanning and Cathode Driver Chip.