HP-IL IC?

[Paul Berger (Canada)]

I have two versions of "Network Interface" cards that are apparently for 5890 gas chronographs. The first part number 19242-60010 I have two one has a 1LB3-0003 the other a 1LR4-0002 the 1LR4 has a date code 1 year newer than the 1LB3. This card is powered by a 8031 processor.

The other 3 cards I have are PN 19242-60015 this is likely a later card all have 1LR4-002 chips with date codes 90 and 91 and is powered by a 68B09 this card has a large VLSI chip that I would really like to know the function of. It is obviously a more capable card with a much more powerful processor and 256K of DRAM.

If the card you have is the same as either of them then yes the 28 pin chip near the pulse transformer is a HPIL chip. Since the date code on your chip is still later it may just be a later revision of the chip.

Paul.