HD74LS293 データシートの表示（PDF） - Renesas Electronics
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HD74LS293 Datasheet PDF : 8 Pages
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HD74LS293
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Supply voltage
VCC
7
V
Input voltage
RO Inputs
VIN
A, B Inputs
7
V
5.5
V
Power dissipation
Operating temperature
PT
Topr
400
mW
–20 to +75
°C
Storage temperature
Tstg
–65 to +150
°C
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Recommended Operating Conditions
Item
Supply voltage
Output current
Operating temperature
Count frequency
A input
B input
A input
Pulse width
B input
Reset
inputs
Setup time
Symbol
VCC
IOH
IOL
Topr
ƒcount
tw
tsu
Min
4.75
—
—
–20
0
0
15
30
15
25
Typ
Max
5.00
5.25
—
–400
—
8
25
75
—
32
—
16
—
—
—
—
—
—
—
—
Unit
V
µA
mA
°C
MHz
ns
ns
Electrical Characteristics
(Ta = –20 to +75 °C)
Item
Symbol min. typ.* max. Unit
Condition
Input voltage
VIH
2.0
—
—
V
VIL
—
—
0.8
V
Output voltage
VOH
2.7
—
—
V
VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,
IOH = –400 µA
VOL
—
—
0.4
V
IOL = 4 mA** VCC = 4.75 V,
—
—
0.5
IOL = 8 mA** VIH = 2 V, VIL = 0.8 V
Any Reset
—
—
20
A input
B input
IIH
—
—
40
µA VCC = 5.25 V, VI = 2.7 V
—
—
40
Any Reset
—
—
–0.4
Input
current
A input
IIL
—
—
–2.4
mA VCC = 5.25 V, VI = 0.4 V
B input
—
—
–1.6
Any Reset
—
—
0.1
VI = 7 V
A input
B input
II
—
—
—
—
0.2
0.2
mA
VI = 5.5 V VCC = 5.25 V
Short-circuit output current
IOS
–20
—
–100
mA VCC = 5.25 V
Supply current***
ICC
—
9
15
mA VCC = 5.25 V
Input clamp voltage
VIK
—
—
–1.5
V
VCC = 4.75 V, IIN = –18 mA
Notes: * VCC = 5 V, Ta = 25°C
** QA output is tested at specified IOL plus the limit value of IIL for the B input. This permits driving the B input
while maintaining full fan-out capability.
*** ICC is measured with all outputs open, both R0 inputs grounded following momentary connection to 4.5 V, and
all other inputs grounded.
Rev.3.00, Jul.15.2005, page 3 of 7
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