SN74LS170 データシートの表示（PDF） - Motorola => Freescale
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SN74LS170 Datasheet PDF : 4 Pages
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SN54 / 74LS170
WRITE FUNCTION TABLE (SEE NOTES A, B, AND C)
WRITE INPUTS
WORD
WB
WA
EW
0
1
2
3
L
L
L
Q = D Q0
Q0
Q0
L
H
L
Q0 Q = D Q0
Q0
H
L
L
Q0
Q0 Q = D Q0
H
H
L
Q0
Q0
Q0 Q = D
X
X
H
Q0
Q0
Q0
Q0
READ FUNCTION TABLE (SEE NOTES A AND D)
READ INPUTS
OUTPUTS
RB RA ER
Q1
Q2
Q3
Q4
L
L
L W0B1 W0B2 W0B3 W0B4
L
H
L W1B1 W1B2 W1B3 W1B4
H
L
L W2B1 W2B2 W2B3 W2B4
H
H
L W3B1 W3B2 W3B3 W3B4
X
X
H
H
H
H
H
NOTES: A. H = HIGH Level. L = LOW Level, X = Irrelevant.
NOTES: B. (Q = D) = The four selected internal flip-flop outputs will assume the states applied to the four external data inputs.
NOTES: C. Q0 = the level of Q before the indicated input conditions were established.
NOTES: D. W0B1 = The first bit of word 0, etc.
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
Supply Voltage
TA
Operating Ambient Temperature Range
VOH
IOL
Output Voltage — High
Output Current — Low
Min
Typ
Max
Unit
54
4.5
5.0
5.5
V
74
4.75
5.0
5.25
54
– 55
25
125
°C
74
0
25
70
54, 74
5.5
V
54
4.0
mA
74
8.0
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min Typ Max Unit
Test Conditions
VIH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
54
VIL
Input LOW Voltage
74
0.7
Guaranteed Input LOW Voltage for
0.8
V
All Inputs
VIK
IOH
VOL
Input Clamp Diode Voltage
Output HIGH Current
54, 74
Output LOW Voltage
54, 74
74
– 0.65 – 1.5
V
VCC = MIN, IIN = – 18 mA
100
µA VCC = MIN, VOH = MAX
0.25 0.4
0.35 0.5
V
IOL = 4.0 mA
VCC = VCC MIN,
VIN = VIL or VIH
V
IOL = 8.0 mA
per Truth Table
Input HIGH Current
Any D, R, W
IIH
ER, EW
Any D, R, W
ER, EW
Input LOW Current
IIL
Any D, R, W
ER, EW
ICC
Power Supply Current
20
µA VCC = MAX, VIN = 2.4 V
40
0.1
0.2
mA VCC = MAX, VIN = 7.0 V
– 0.4 mA VCC = MAX, VIN = 0.4 V
– 0.8
40
mA VCC = MAX
FAST AND LS TTL DATA
5-3
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