Farnell catalogue says the pinout for TIL311 is:

1 led supply (TI)
2 latch data i/p B
3 latch data i/p A
4 left decimal point cathode
5 latch strobe i/p
6 n/c
7 common gnd

8 blanking input
9 n/c
10 right decimal point cathode
11 n/c
12 latch data i/p D
13 latch data i/p C
14 logic supply Vcc



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