Datasheet

  
  
SCHS279D − DECEMBER 1998 − REVISED OCTOBER 2003
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
FUNCTION TABLE
INPUTS OUTPUTS
LE BL LT D
3
D
2
D
1
D
0
a b c d e f g DISPLAY
X X L X X X X H H H H H H H 8
X LHXXXXLL L L L L L Blank
L HHL LLLHHHHHHL 0
L HHL LLHLHHLLLL 1
L HHL LHLHHLHHLH 2
L HHL LHHHHHHL LH 3
L HHLHLLLHHL LHH 4
L HHLHLHHLHHLHH 5
L HHLHHL L LHHHHH 6
L HHLHHHHHHLLLL 7
L HHHLLLHHHHHHH 8
L HHHLLHHHHL LHH 9
L HHHLHLLL L L L L L Blank
L HHHLHHLL L L L L L Blank
L HHHHLLLL L L L L L Blank
L HHHHLHLL L L L L L Blank
L HHHHHL L L L L L L L Blank
L HHHHHHL L L L L L L Blank
H H H X X X X
† † † † † † † †
X = Don’t care
†
Depends on BCD code previously applied when LE
= L
NOTE: Display is blank for all illegal input codes (BCD > HLLH).
function diagram
7
1
2
6
5
4
D
0
D
1
D
2
D
3
LE
BL
LT
3
V
SS
= 8
V
DD
= 16
13
12
11
10
9
15
14
a
b
c
d
e
f
g
Latch
Decoder
Driver
7-Segment
Outputs
BCD
Inputs