Datasheet

September 1993 7
Philips Semiconductors Product specification
Programmable delay timer with oscillator 74HC/HCT5555
DELAY TIME SELECTION
SELECT INPUTS OUTPUT Q/Q (FREQUENCY DIVIDING)
S
3
S
2
S
1
S
0
BINARY DECIMAL
LLLL2
1
2
LLLH2
2
4
LLHL2
3
8
LLHH2
4
16
LHLL2
5
32
LHLH2
6
64
LHHL2
7
128
LHHH2
8
256
..... .
HLLL2
17
131 072
HLLH2
18
262 144
HLHL2
19
524 288
HLHH2
20
1 048 576
HHL L2
21
2 097 152
HHLH2
22
4 194 304
HHHL2
23
8 388 608
HHHH2
24
16 777 216
Fig.5 Timing diagram.
Timing example shown for S
3
, S
2
, S
1
, S
0
= 0011 (binary 2
4
, decimal 16).
handbook, full pagewidth
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
RS
MR
A
Q
MGA649