name: 74LS1616 function: 16x16bit Multiplier package: DIP,64 manufacturer: TI added-by: Long John Silicon +--()--+ X4 | 1 64| X5 X3 | 2 63| X6 X2 | 3 62| X7 X1 | 4 61| X8 (LSB) X0 | 5 60| X9 OELS! | 6 59| X10 CLKP | 7 58| X11 CLKY | 8 57| X12 (LSB)Y0/Pr0 | 9 56| X13 Y1/PR1 |10 55| X14 Y2/PR2 |11 54| X15 (MSB) Y3/PR3 |12 53| CLKX Y4/PR4 |13 52| RND Y5/PR5 |14 51| OP0 Y6/PR6 |15 50| OP1 Y7/PR7 |16 49| VCC Y8/PR8 |17 48| CHGSIGN Y9/PR9 |18 47| GND Y10/PR10 |19 46| GND Y11/PR11 |20 45| OP2 Y12/PR12 |21 44| FT Y13/PR13 |22 43| OVR Y14/PR14 |23 42| OEMS! Y15/PR15 |24 41| CLKOP PR16 |25 40| PR31 (MSB) PR17 |26 39| PR30 PR18 |27 38| PR29 PR19 |28 37| PR28 PR20 |29 36| PR27 PR21 |30 35| PR26 PR22 |31 34| PR25 PR23 |32 33| PR24 +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/