74F579 8-Bit Bidirectional Binary Counter with 3-STATE Outputs
April 1988
Revised October 2000
74F579
8-Bit Bidirectional Binary Counter with 3-STATE Outputs
General Description
The 74F579 is a fully synchronous 8-stage up/down
counter with multiplexed 3-STATE I/O ports for bus-ori-
ented applications. It features a preset capability for pro-
grammable operation, carry lookahead for easy cascading
and a U/D input to control the direction of counting. All state
changes, whether in counting or parallel loading, are initi-
ated by the rising edge of the clock.
Features
s
Multiplexed 3-STATE I/O ports
s
Built-in lookahead carry capability
s
Count frequency 100 MHz typical
s
Supply current 75 mA typical
s
Guaranteed 4000V minimum ESD protection
Ordering Code:
Order Number
74F579SC
74F579SJ
74F579PC
Package Number
M20B
M20D
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” tot he ordering code.
Logic Symbol
Connection Diagram
© 2000 Fairchild Semiconductor Corporation
DS009568
www.fairchildsemi.com
74F579
Unit Loading/Fan Out
Pin Names
I/O
0
–I/O
7
PE
U/D
MR
SR
CEP
CET
CS
OE
CP
TC
Data Inputs or
3-STATE Outputs
Parallel Enable Input (Active LOW)
Up-Down Count Control Input
Master Reset Input (Active LOW)
Synchronous Reset Input (Active LOW)
Count Enable Parallel Input (Active LOW)
Count Enable Trickle Input (Active LOW)
Chip Select Input Active (Active LOW)
Output Enable Input (Active LOW)
Clock Pulse Input (Active Rising Edge)
Terminal Count Output (Active LOW)
Description
U.L.
HIGH/LOW
3.5/0.333
75/15
0.25/0.333
0.25/0.333
0.25/0.333
0.25/0.333
0.25/0.333
0.25/0.333
0.25/0.333
0.25/0.333
0.25/0.333
25/12.5
Input I
IH
/I
IL
Output I
OH
/I
OL
70
µ
A/
−
0.2 mA
−
3 mA/24 mA
5
µ
A/
−
0.2 mA
5
µ
A/
−
0.2 mA
5
µ
A/
−
0.2 mA
5
µ
A/
−
0.2 mA
5
µ
A/
−
0.2 mA
5
µ
A/
−
0.2 mA
5
µ
A/
−
0.2 mA
5
µ
A/
−
0.2 mA
5
µ
A/
−
0.2 mA
−
1 mA/5 mA
Function Table
MR
X
X
X
L
H
H
H
H
H
H
SR
X
X
X
X
L
H
H
H
H
H
CS
H
L
L
X
X
L
PE
X
H
H
X
X
L
CEP CET U/D
X
X
X
X
X
X
H
X
L
L
X
X
X
X
X
X
X
H
L
L
X
X
X
X
X
X
X
X
H
L
OE
X
H
L
X
X
X
X
X
X
X
CP
X
X
X
Function
I/O
a
to I/O
h
in High Z (PE Disabled)
I/O
a
to I/O
h
in High Z
Flip-Flop Outputs Appear on I/O 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
(Not LL)
(Not LL)
(Not LL)
(Not LL)
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
= LOW to HIGH Clock Transition
Not LL = CS and PE should never both be LOW voltage level at the same time.
X
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2
74F579
Logic Diagrams
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
V
CC
=
Pin 16
GND
=
Pin 6
()
=
Pin Numbers
Detail A
3
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74F579
Absolute Maximum Ratings
(Note 1)
Storage Temperature
Ambient Temperature under Bias
Junction Temperature under Bias
V
CC
Pin Potential to Ground Pin
Input Voltage (Note 2)
Input Current (Note 2)
Voltage Applied to Output
in HIGH State (with V
CC
=
0V)
Standard Output
3-STATE Output
Current Applied to Output
in LOW State (Max)
ESD Last Passing Voltage (Min)
twice the rated I
OL
(mA)
4000V
−
65
°
C to
+
150
°
C
−
55
°
C to
+
125
°
C
−
55
°
C to
+
150
°
C
−
0.5V to
+
7.0V
−
0.5V to
+
7.0V
−
30 mA to
+
5.0 mA
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
0
°
C to
+
70
°
C
+
4.5V to
+
5.5V
−
0.5V to V
CC
−
0.5V to
+
5.5V
Note 1:
Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditions is not implied.
Note 2:
Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol
V
IH
V
IL
V
CD
V
OH
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH
Voltage
V
OL
I
IH
I
BVI
I
BVIT
I
CEX
V
ID
I
OD
I
ZZ
I
IL
I
IH
& I
OZH
I
IL
& I
OZL
I
OS
I
CCH
I
CCL
I
CCZ
Output LOW
Voltage
Input HIGH
Current
Input HIGH Current
Breakdown Test
Input HIGH Current
Breakdown (I/O)
Output HIGH
Leakage Current
Input Leakage
Test
Output Leakage
Circuit Control
Bus Drainage Test
Input LOW Current
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Power Supply Current
Power Supply Current
Power Supply Current
−60
70
85
85
4.75
3.75
500
−0.2
70
−200
−150
110
120
125
10% V
CC
5% V
CC
10% V
CC
5% V
CC
2.4
2.7
0.5
0.5
5.0
7.0
0.5
50
Min
2.0
0.8
−1.2
Typ
Max
Units
V
V
V
V
Min
Min
V
CC
Conditions
Recognized as a HIGH Signal
Recognized as a LOW Signal
I
IN
= −18
mA
I
OH
= −3
mA
I
OL
=
20 mA (TC), I
OL
=
24 mA (I/O
n
)
I
OL
=
20 mA (TC), I
OL
=
24 mA (I/O
n
)
V
IN
=
2.7V (Non-I/O Pins)
V
IN
=
7.0V (Non-I/O Pins)
V
IN
=
5.5V (I/O
n
)
V
OUT
=
V
CC
I
ID
=
1.9
µA
All Other Pins Grounded
V
IOD
=
150 mV
All Other Pins Grounded
V
OUT
=
5.25V
V
IN
=
0.5V (Non-I/O Pins)
V
OUT
=
2.7V (I/O
n
)
V
OUT
=
0.5V (I/O
n
)
V
OUT
=
0V
V
O
=
HIGH
V
O
=
LOW
V
O
=
HIGH Z
V
µA
µA
mA
µA
V
µA
µA
mA
µA
µA
mA
mA
mA
mA
Min
Max
Max
Max
Max
0.0
0.0
0.0
Max
Max
Max
Max
Max
Max
Max
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4
74F579
AC Electrical Characteristics
T
A
= +25°C
Symbol
Parameter
Min
f
MAX
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PHL
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PZH
t
PZL
t
PHZ
t
PLZ
Maximum Clock Frequency
Propagation Delay
CP to I/O
n
Propagation Delay
CP to TC
Propagation Delay
U/D to TC
Propagation Delay
CEP or CET to TC
Propagation Delay
MR to I/O
n
Propagation Delay
MR to TC
Output Enable Time
CS or PE to I/O
Output Disable Time
CS or PE to I/O
Output Enable Time
OE to I/O
n
Output Disable Time
OE to I/O
n
70
3.0
5.0
5.0
5.0
4.5
4.5
2.5
3.5
5.0
6.5
3.0
5.5
2.0
2.0
3.0
5.0
2.0
2.0
V
CC
= +5.0V
C
L
=
50 pF
Typ
85
5.0
8.0
7.5
7.0
7.0
8.0
3.8
6.0
7.5
10.0
5.0
8.0
5.0
4.5
5.0
8.0
4.0
4.0
7.5
11.5
11.5
11.5
9.0
9.5
6.0
8.0
10.0
13.0
8.5
10.5
8.5
8.0
8.0
11.0
6.5
6.0
Max
T
A
=
0°C to
+70°C
V
CC
= +5.0V
C
L
=
50 pF
Min
80
3.0
5.0
5.0
5.0
4.5
4.5
2.5
3.5
5.0
6.5
3.0
5.5
2.0
2.0
3.0
5.0
2.0
2.0
8.0
11.5
12.0
12.0
10.0
10.0
6.5
8.5
10.0
13.5
9.0
11.5
9.0
8.5
8.5
12.0
6.5
6.5
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Max
Units
AC Operating Requirements
T
A
= +25°C
Symbol
Parameter
Min
t
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
S
(H)
t
S
(L)
t
H
(H)
t
H
(L)
t
W
(H)
t
W
(L)
t
W
(L)
t
REC
Setup Time
I/O
n
to CP
Hold Time
I/O
n
to CP
Setup Time
PE, CS or SR to CP
Hold Time
PE, CS or SR to CP
Setup Time
CET or CEP to CP
Hold Time
CET or CEP to CP
Setup Time
U/D to CP
Hold Time
U/D to CP
Clock Pulse Width
HIGH or LOW
MR Pulse Width
Recovery Time
MR to CP
4.0
4.0
0.0
0.0
9.5
9.5
0.0
0.0
6.5
9.5
0.0
0.0
9.0
9.0
0.0
0.0
4.5
4.5
3.0
4.0
V
CC
= +5.0V
Typ
Max
T
A
=
0°C to
+70°C
V
CC
= +5.0V
Min
4.0
4.0
0.0
0.0
9.5
9.5
0.0
0.0
6.5
9.5
0.0
0.0
9.5
9.5
0.0
0.0
4.5
4.5
3.0
4.0
Max
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Units
5
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