This unit is a Texas Instruments ABT16821 Integrated Circuit.
.
***MPN ABT16821
***OEM Texas Instruments
***SKU*** 24401

This unit is a National Semiconductor MP124Z Integrated Circuit.

***MPN MP124Z
***OEM National Semiconductor
***SKU*** 24400

This unit is an Advanced Micro Devices AM25LS2519PC Integrated Circuit.
.
***MPN AM25LS2519PC
***OEM Advanced Micro Devices
***SKU*** 24397

This unit is an Advanced Micro Devices AM25LS2569DC Integrated Circuit.
.
***MPN AM25LS2569DC
***OEM Advanced Micro Devices
***SKU*** 24393

This unit is a Zilog Z0853008VSC Integrated Circuit..

***MPN Z0853008VSC
***OEM Zilog
***SKU*** 26048

This unit is a National Semiconductor JM38510/00803BCA Integrated Circuit.
***MPN JM38510/00803BCA
***OEM National Semiconductor
***SKU*** 24392

This unit is a Texas Instruments 5962-7802004MEA Integrated Circuit.

***MPN 5962-7802004MEA
***OEM Texas Instruments
***SKU*** 24390

This unit is a Advanced Micro Devices AM27S45/BLA Integrated Circuit.
.
***MPN AM27S45/BLA
***OEM Advanced Micro Devices
***SKU*** 24389

This unit is a National Semiconductor JM38510/34002 Integrated Circuit.
MPN:
JM38510/34002
BCA 27014 USA
ZOB9104A.
***MPN JM38510/34002
***OEM National Semiconductor
***SKU*** 26045

This unit is a National Semiconductor M38510/33301 Integrated Circuit.
National Semiconductor M38510/33301 Integrated Circuit.
***MPN M38510/33301
***OEM National Semiconductor
***SKU*** 24386

This unit is a Motorola MC14081BCL Integrated Circuit.
.
***MPN MC14081BCL
***OEM Motorola
***SKU*** 24385

This unit is a Signetics Corp 54F00/BCA Integrated Circuit.
.
***MPN 54F00/BCA
***OEM Signetics Corp
***SKU*** 24383