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參數(shù)資料
| 型號(hào)： | SN54LS174 |
| 廠商： | Motorola, Inc. |
| 英文描述： | HEX D FLIP-FLOP |
| 中文描述： | 六角D觸發(fā)器 |
| 文件頁數(shù)： | 2/3頁 |
| 文件大?。?/td> | 75K |
| 代理商： | SN54LS174 |
5-2
FAST AND LS TTL DATA
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
L
H
L
Note 1: t = n + 1 indicates conditions after next clock.
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
VCC
Supply Voltage
54
74
4.5
4.75
5.0
5.0
5.5
5.25
V
TA
Operating Ambient Temperature Range
54
74
–55
0
25
25
125
70
°
C
IOH
IOL
Output Current — High
54, 74
–0.4
mA
Output Current — Low
54
74
4.0
8.0
mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Symbol
Parameter
Limits
Unit
Test Conditions
Min
Typ
Max
VIH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
VIL
Input LOW Voltage
54
0.7
V
Guaranteed Input LOW Voltage for
All Inputs
74
0.8
VIK
Input Clamp Diode Voltage
–0.65
–1.5
V
VCC = MIN, IIN = –18 mA
VOH
Output HIGH Voltage
54
2.5
3.5
V
or VIL per Truth Table
74
2.7
3.5
V
VCC = MIN, IOH = MAX, VIN = VIH
VOL
Output LOW Voltage
54, 74
0.25
0.4
V
IOL = 4.0 mA
VCC = VCC MIN,
per Truth Table
74
0.35
0.5
V
IOL = 8.0 mA
VIN = VIL or VIH
IIH
Input HIGH Current
20
μ
A
VCC = MAX, VIN = 2.7 V
VCC = MAX, VIN = 7.0 V
VCC = MAX, VIN = 0.4 V
VCC = MAX
VCC = MAX
0.1
mA
IIL
IOS
ICC
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
Input LOW Current
–0.4
mA
Short Circuit Current (Note 1)
–20
–100
mA
Power Supply Current
26
mA
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