HT12A/HT12EOscillator Frequency vs. Supply Voltagef O S C( S c a l e )R O S C ( W ) 7 . 0 0 4 7 0 k 5 1 0 k 6 . 0 0 5 6 0 k 6 2 0 k 5 . 0 0 6 8 0 k 7 5 0 k 4 . 0 0 8 2 0 k 9 1 0 k 1 . 0 M ( 3 k H z ) 3 . 0 0 1 . 2 M 1 . 5 M 2 . 0 0 2 . 0 M 1 . 0 0 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 V D D ( V D C ) The recommended oscillator frequency is fOSCD (decoder) @ 50 fOSCE (HT12E encoder) @ 1 fOSCE (HT12A encoder) 3 Application Circuits V D D 1 0 0 W T r a n s m i t t e r C i r c u i t V D D 1 A 0 V D D 1 8 8 0 5 0 1 A 0 V D D 1 8 2 1 0 k W A 1 1 7 D O U T 2 A 1 D O U T 1 7 4 5 5 K 3 A 2 X 1 1 6 1 0 0 p F 3 A 2 O S C 1 1 6 1 0 M W 4 R O S C A 3 1 5 X 2 1 5 4 1 0 0 p F A 3 O S C 2 5 5 1 4 A 4 1 4 L / M B A 4 T E 6 6 1 3 A 5 D 1 1 1 3 A 5 A D 1 1 7 7 1 2 A 6 D 1 0 1 2 A 6 A D 1 0 8 8 1 1 A 7 D 9 1 1 A 7 A D 9 9 9 1 0 V S S D 8 1 0 V S S A D 8 H T 1 2 AH T 1 2 E Rev. 1.20 9 February 20, 2009 Document Outline Features Applications General Description Selection Table Block Diagram Pin Assignment Pin Description Absolute Maximum Ratings Electrical Characteristics Functional Description Application Circuits Package Information Product Tape and Reel Specifications
