74F579 Philips, 74F579 Datasheet - Page 3

• Manufacturer Part Number: 74F579
• Description: 8-bit bidirectional binary counter 3-State
• Manufacturer: Philips

Philips Semiconductors
LOGIC SYMBOL
FUNCTION TABLE
H
L
X
(not LL)
1992 May 04
V
GND = Pin 6
8-bit bidirectional binary counter (3-State)
MR
CC
X
X
X
H
H
H
H
H
H
L
18
17
11
1
= Pin 16
=
=
=
=
=
SR
CP
CEP
CET
OE
X
X
X
X
H
H
H
H
H
L
High voltage level
Low voltage level
Don’t care
Low-to-High clock transition
CS and PE should never be Low voltage level at the same time.
I/O0
2
PE
13
I/O1
3
CS
H
X
X
L
L
L
(not LL)
(not LL)
(not LL)
(not LL)
I/O2
4
12
CS
I/O3
5
PE
MR
H
H
20
X
X
X
L
I/O4
7
19
INPUTS
SR
I/O5 I/O6
8
CEP
X
X
X
X
X
X
H
X
L
L
9
14
U/D
I/O7
10
CET
TC
X
X
X
X
X
X
X
H
L
L
SF01086
15
U/D
X
X
X
X
X
X
X
X
H
L
3
OE
LOGIC SYMBOL (IEEE/IEC)
H
X
L
X
X
X
X
X
X
X
CP
X
X
X
X
19
12
13
11
14
17
18
1
20
I/O0 to I/O7 in high impedance (PE disabled)
I/O0 to I/O7 in high impedance
Flip-flop output appears on I/On lines
Asynchronous reset for all flip-flops
Synchronous reset for all flip-flops
Parallel load all flip-flops
Hold
Hold (TC held High)
Count up
Count down
2,5,7, +/C8
2,4,7–
R9
1
1
1
1
1
1
1
&
EN6
&
1
u1
R1
M4[DOWN]
CTR DIV 256
&
M5[UP]
G7
[128]
M2[LOAD]
EN3
[16]
[32]
[64]
[1]
[2]
[4]
[8]
OPERATING MODE
3,5,6,8 CT=256
3,4,6,8 CT=0
1,2,3,4,
5,6,7,8
SF01087
Product specification
10
15
6
8
9
2
3
4
5
74F579