NTE74HCT174
Integrated Circuit
TTL − High Speed CMOS,
Hex D−Type Flip−Flop with Clear
Description:
The NTE74HCT174 is a positive edge−triggered flip−flop in a 16−Lead DIP type package that has
a common clock and clear and independent Q outputs. Data on a D input, having the specified set−up
and hold time, is transferred to the corresponding Q output on the positive−going transition of the clock
pulse. The asynchronous clear forces all outputs low when it is low.
All inputs to this device are protected from damage due to electrostatic discharge by diodes to VCC
and GND.
Features:
D Typical Propagation Delay: 20ns
D Low Quiescent Current: 80μA (max)
D Fanout of 10 LS−TTL Loads
Absolute Maximum Ratings: (Note 1, Note 2)
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 to +7.0V
DC Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −1.5 to VCC +1.5V
DC Output Voltage, VOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 to VCC + 0.5V
Clamp Diode Current, IIK, IOK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20mA
DC Output Current (Per Pin), IOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25mA
DC VCC or GND Current (Per Pin), ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50mA
Power Dissipation (Note 3), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mW
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to +150°C
Lead Temperature (During Soldering, 10sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +260°C
Note 1. Absolute Maximum Ratings are those values beyond which damage to the device may occur.
Note 2. Unless otherwise specified, all voltages are referenced to GND.
Note 3. Power Dissipation temperature derating: 12mW/°C from +65°C to +85°C.
Recommended Operating Conditions:
Parameter
Symbol
Min
Typ
Max
Unit
VCC
4.5
−
5.5
V
VIN, VOUT
0
−
VCC
V
Operating Temperature Range
TA
−40
−
+85
°C
Input Rise or Fall Times
tr, tf
−
−
500
ns
Supply Voltage
DC Input or Output Voltage
DC Electrical Characteristics: (VCC = 5V ±10% unless otherwise specified)
TA = +25°C
Typ
Guaranteed Limits
Parameter
Symbol
Minimum High Level Input Voltage
VIH
−
2.0
2.0
V
Maximum Low Level Input Voltage
VIL
−
0.8
0.8
V
Minimum High Level Output Voltage
Maximum Low Level Output Voltage
VOH
VOL
Test Conditions
TA = −40° to +85°C
VIN = VIH
or VIL
VIN = VIH
−0.1
|IOUT| = 20μA
VCC VCC
|IOUT| = 4.0mA, VCC = 4.5V
4.2
3.98
3.84
V
|IOUT| = 4.8mA, VCC = 5.5V
5.7
4.98
4.84
V
0
0.1
0.1
V
|IOUT| = 4.0mA, VCC = 4.5V
0.2
0.26
0.33
V
|IOUT| = 4.8mA, VCC = 5.5V
0.2
0.26
0.33
V
|IOUT| = 20μA
VCC
−0.1
Unit
V
Maximum Input Current
IIN
VIN = VCC or GND, VIH or VIL
−
±0.1
±1.0
μA
Maximum Quiescent Supply Current
ICC
VIN = VCC or GND, IOUT = 0μA
−
8
80
μA
VIN = 2.4V or 0.5V, Note 4
−
−
−
μA
Note 4. This is measured per input with all other inputs held at VCC or GND.
AC Electrical Characteristics: (VCC = 5V, tr = tf = 6ns, CL = 15pF, TA = +25°C unless otherwise
specified)
Parameter
Symbol
Typ
Guaranteed Limits
Unit
fMAX
50
30
MHz
Maximum Propagation Delay (Clock to Q)
tPHL, tPLH
18
30
ns
Maximum Propagation Delay (Clear to Q)
tPHL, tPLH
18
30
ns
Maximum Removal Time (Clear to Clock)
tREM
−
20
ns
Minimum Set Up Time (D to Clock)
tS
10
30
ns
Minimum Hold Time (Clock to Q)
tH
−3
0
ns
Minimum Pulse Width (Clock or Clear)
tW
8
16
ns
Maximum Operating Frequency
Test Conditions
AC Electrical Characteristics: (VCC = 5V ±10%, tr = tf = 6ns, CL = 50pF unless otherwise
specified)
TA = +25°C
Parameter
Maximum Operating Frequency
Symbol
Test Conditions
Typ
TA = −40° to +85°C
Guaranteed Limits
Unit
fMAX
40
22
18
MHz
Maximum Propagation Delay (Clock to Q)
tPHL, tPLH
22
35
44
ns
Maximum Propagation Delay (Clear to Q)
tPHL, tPLH
22
35
44
ns
Minimum Removal Time (Clear to Clock)
tREM
−
20
25
ns
Minimum Setup Time (D to Clock)
tS
10
20
25
ns
Minimum Hold Time (D to Clock)
tH
−3
0
0
ns
Minimum Pulse Width (Clock or Clear)
tW
−
16
20
ns
Maximum Input Rise and Fall Time
tr, tf
−
500
500
ns
tTHL, tTLH
−
15
19
ns
−
−
−
pF
5
10
10
pF
Maximum Output Rise and Fall Time
Power Dissipation Capacitance
CPD
Maximum Input Capacitance
CIN
Per Flip−Flop, Note 5
Note 5. CPD determines the no load dynamic power consumption, PD = CPD VCC2 f + ICC VCC, and
the no load dynamic current consumption, IS = CPD VCC f + ICC.
Pin Connection Diagram
Clear 1
16 VCC
1Q 2
1D 3
15 6Q
14 6D
2D 4
13 5D
2Q 5
12 5Q
3D 6
11 4D
3Q 7
10 4Q
GND 8
9 Clock
16
9
1
8
.870 (22.0) Max
.260 (6.6)
Max
.200
(5.08)
Max
.100 (2.54)
.700 (17.78)
.099 (2.5) Min
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