SN74LS174 データシートの表示（PDF） - Motorola => Freescale
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SN74LS174 Datasheet PDF : 3 Pages
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SN54 / 74LS174
FUNCTIONAL DESCRIPTION
The LS174 consists of six edge-triggered D flip-flops with
individual D inputs and Q outputs. The Clock (CP) and Master
Reset (MR) are common to all flip-flops.
Each D input’s state is transferred to the corresponding flip-
flop’s output following the LOW to HIGH Clock (CP) transition.
A LOW input to the Master Reset (MR) will force all outputs
LOW independent of Clock or Data inputs. The LS174 is
useful for applications where the true output only is required
and the Clock and Master Reset are common to all storage
elements.
TRUTH TABLE
Inputs (t = n, MR = H)
Outputs (t = n+1) Note 1
D
Q
H
H
L
L
Note 1: t = n + 1 indicates conditions after next clock.
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
Supply Voltage
TA
Operating Ambient Temperature Range
IOH
Output Current — High
IOL
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
– 0.4
mA
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
VOH
Input Clamp Diode Voltage
54
Output HIGH Voltage
74
– 0.65 – 1.5
2.5
3.5
2.7
3.5
V
VCC = MIN, IIN = – 18 mA
V
VCC = MIN, IOH = MAX, VIN = VIH
V
or VIL per Truth Table
VOL
Output LOW Voltage
54, 74
74
0.25 0.4
0.35 0.5
V
IOL = 4.0 mA
V
IOL = 8.0 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
IIH
Input HIGH Current
20
µA VCC = MAX, VIN = 2.7 V
0.1
mA VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
– 0.4 mA VCC = MAX, VIN = 0.4 V
IOS
Short Circuit Current (Note 1)
– 20
– 100 mA VCC = MAX
ICC
Power Supply Current
26
mA VCC = MAX
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
FAST AND LS TTL DATA
5-2
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