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7493 PDF 데이터시트 ( Data , Function )

부품번호 7493 기능
기능 Decade and Binary Counters
제조업체 National Semiconductor
로고 National Semiconductor 로고 


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7493 데이터시트, 핀배열, 회로
www.DataSheet4U.com
July 1992
DM5490 DM7490A DM7493A
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 90A and divide-
by-eight for the 93A
All of these counters have a gated zero reset and the 90A
also has gated set-to-nine inputs for use in BCD nine’s com-
plement applications
To use their maximum count length (decade or four-bit bina-
ry) 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 di-
vide-by-ten count can be obtained from the 90A 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
Y Typical power dissipation
90A 145 mW
93A 130 mW
Y Count frequency 42 MHz
Connection Diagrams
Dual-In-Line Package
TL F 6533 – 1
Order Number DM5490J DM5490W or DM7490AN
See NS Package Number J14A N14A or W14B
Dual-In-Line Package
Order Number DM7493AN
See NS Package Number N14A
TL F 6533 – 2
C1995 National Semiconductor Corporation TL F 6533
RRD-B30M105 Printed in U S A




7493 pdf, 반도체, 판매, 대치품
Recommended Operating Conditions
Symbol
Parameter
VCC
VIH
VIL
IOH
IOL
fCLK
tW
tREL
TA
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Clock Frequency
(Note 5)
A
B
Pulse Width
(Note 5)
A
B
Reset
Reset Release Time (Note 5)
Free Air Operating Temperature
DM7493A
Min Nom Max
4 75 5
5 25
2
08
b0 8
16
0 32
0 16
15
30
15
25
0 70
Units
V
V
V
mA
mA
MHz
ns
ns
C
’93A Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
(Note 1)
Max
Units
VI
VOH
VOL
II
Input Clamp Voltage
High Level Output
Voltage
Low Level Output
Voltage
Input Current Max
Input Voltage
VCC e Min II e b12 mA
VCC e Min IOH e Max
VIL e Max VIH e Min
VCC e Min IOL e Max
VIH e Min VIL e Max (Note 4)
VCC e Max VI e 5 5V
b1 5
V
24 34
V
02 04 V
1 mA
IIH
High Level Input
VCC e Max
Current
VI e 2 4V
Reset
A
40
80 mA
B 80
IIL
Low Level Input
VCC e Max
Current
VI e 0 4V
Reset
A
b1 6
b3 2
mA
B b3 2
IOS Short Circuit
Output Current
VCC e Max
(Note 2)
b18
b57
mA
ICC Supply Current
VCC e Max (Note 3)
26 39 mA
Note 1 All typicals are at VCC e 5V TA e 25 C
Note 2 Not more than one output should be shorted at a time
Note 3 ICC is measured with all outputs open both R0 inputs grounded following momentary connection to 4 5V and all other inputs grounded
Note 4 QA outputs are tested at IOL e Max plus the limit value of IIL for the B input This permits driving the B input while maintaining full fan-out capability
Note 5 TA e 25 C and VCC e 5V
4

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7493 전자부품, 판매, 대치품
Logic Diagrams
90A
93A
TL F 6533 – 3
The J and K inputs shown without connection are for reference only and are functionally at a high level
TL F 6533 – 4
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관련 데이터시트

부품번호상세설명 및 기능제조사
7490

Package Contains a Divide-by-Two and a Divide-by-Five Counter

ETC
ETC
7490

Package Contains a Divide-by-Two and a Divide-by-Five Counter

ETC
ETC

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