Binary Counters. DM74LS90M Datasheet

DM74LS90M Counters. Datasheet pdf. Equivalent

DM74LS90M Datasheet
Recommendation DM74LS90M Datasheet
Part DM74LS90M
Description Decade and Binary Counters
Feature DM74LS90M; DM74LS90/DM74LS93 Decade and Binary Counters March 1998 DM74LS90/DM74LS93 Decade and Binary Counte.
Manufacture Fairchild Semiconductor
Datasheet
Download DM74LS90M Datasheet




Fairchild Semiconductor DM74LS90M
March 1998
DM74LS90/DM74LS93
Decade and Binary Counters
General Description
Each of these monolithic counters contains four
master-slave flip-flops and additional gating to provide a
divide-by-two counter and a three-stage binary counter for
which the count cycle length is divide-by-five for the ’LS90
and divide-by-eight for the ’LS93.
All of these counters have a gated zero reset and the LS90
also has gated set-to-nine inputs for use in BCD nine’s
complement applications.
To use their maximum count length (decade or four bit bi-
nary), the B input is connected to the QA output. The input
count pulses are applied to input A and the outputs are as
described in the appropriate truth table. A symmetrical
divide-by-ten count can be obtained from the ’LS90 counters
by connecting the QD output to the A input and applying the
input count to the B input which gives a divide-by-ten square
wave at output QA.
Features
n Typical power dissipation 45 mW
n Count frequency 42 MHz
Connection Diagrams (Dual-In-Line Packages)
DS006381-1
Order Number DM74LS90M or DM74LS90N
See Package Number M14A or N14A
DS006381-2
Order Number DM74LS93M or DM74LS93N
See Package Number M14A or N14A
© 1998 Fairchild Semiconductor Corporation DS006381
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Fairchild Semiconductor DM74LS90M
Absolute Maximum Ratings (Note 1)
Supply Voltage
Input Voltage (Reset)
Input Voltage (A or B)
7V
7V
5.5V
Operating Free Air Temperature Range
DM74LS
Storage Temperature Range
0˚C to +70˚C
−65˚C to +150˚C
Recommended Operating Conditions
Symbol
Parameter
DM74LS90
Units
Min
Nom
Max
VCC
Supply Voltage
VIH
High Level Input Voltage
VIL
Low Level Input Voltage
IOH
High Level Output Current
IOL
Low Level Output Current
fCLK
Clock Frequency (Note 2)
A to QA
B to QB
fCLK
Clock Frequency (Note 3)
A to QA
B to QB
tW
Pulse Width (Note 2)
A
B
4.75
5
5.25
V
2
V
0.8
V
−0.4
mA
8
mA
0
32
MHz
0
16
0
20
MHz
0
10
15
30
ns
Reset
15
tW
Pulse Width (Note 3)
A
25
B
50
ns
Reset
25
tREL
Reset Release Time (Note 2)
25
ns
tREL
Reset Release Time (Note 3)
35
ns
TA
Free Air Operating Temperature
0
70
˚C
Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these
limits. The parametric values defined in the “Electrical Characteristics” table are not guaranteed at the absolute maximum ratings. The “Recommended Operating
Conditions” table will define the conditions for actual device operation.
Note 2: CL = 15 pF, RL = 2 k, TA = 25˚C and VCC = 5V.
Note 3: CL = 50 pF, RL = 2 k, TA = 25˚C and VCC = 5V.
’LS90 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
VI
Input Clamp Voltage
VCC = Min, II = −18 mA
VOH
High Level Output
VCC = Min, IOH = Max
2.7
Voltage
VIL = Max, VIH = Min
VOL
Low Level Output
VCC = Min, IOL = Max
Voltage
VIL = Max, VIH = Min
(Note 7)
IOL = 4 mA, VCC = Min
II
Input Current @ Max
VCC = Max, VI = 7V
Reset
Input Voltage
VCC = Max
A
VI = 5.5V
B
IIH
High Level Input
VCC = Max, VI = 2.7V
Reset
Current
A
B
Typ
(Note 4)
3.4
0.35
0.25
Max
Units
−1.5
V
V
0.5
V
0.4
0.1
0.2
mA
0.4
20
40
µA
80
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2



Fairchild Semiconductor DM74LS90M
’LS90 Electrical Characteristics (Continued)
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
IIL
Low Level Input
Current
VCC = Max, VI = 0.4V
Reset
A
(Note 4)
−0.4
−2.4
mA
B
−3.2
IOS
Short Circuit
VCC = Max (Note 5)
−20
−100
mA
Output Current
ICC
Supply Current
VCC = Max (Note 4)
9
15
mA
Note 4: All typicals are at VCC = 5V, TA = 25˚C.
Note 5: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 6: ICC is measured with all outputs open, both RO inputs grounded following momentary connection to 4.5V and all other inputs grounded.
Note 7: QA outputs are tested at IOL = Max plus the limit value of IIL for the B input. This permits driving the B input while maintaining full fan-out capability.
’LS90 Switching Characteristics
at VCC = 5V and TA = 25˚C
From (Input)
Symbol
Parameter
To (Output)
fMAX
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPHL
Maximum Clock
Frequency
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
Propagation Delay Time
High to Low Level Output
A to QA
B to QB
A to QA
A to QA
A to QD
A to QD
B to QB
B to QB
B to QC
B to QC
B to QD
B to QD
SET-9 to
QA, QD
SET-9 to
QB, QC
SET-0 to
Any Q
RL = 2 k
CL = 15 pF
CL = 50 pF
Min
Max
Min
Max
32
20
16
10
16
20
18
24
48
52
50
60
16
23
21
30
32
37
35
44
32
36
35
44
30
35
40
48
40
52
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
3
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