NTE74HC240 & NTE74HC244 Integrated Circuit TTL − High Speed

NTE74HC240 & NTE74HC244
Integrated Circuit
TTL − High Speed CMOS,
Octal Buffer/Line Driver with 3−State Outputs
Description:
The NTE74HC240 (Inverting) and NTE74HC244 (Non−Inverting) are 3−state buffers in a 20−Lead DIP
type package that utilizes advanced silicon−gate CMOS technology to achieve the high noise immunity
and low power consumption of standard CMOS integrated circuits. Both devices have active−low output
enables.
Features:
D Typical Propagation Delay: 8ns
D Wide Power Supply Range: 2V to 6V
D High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
D 3−State Outputs
D Buffered Inputs
D High−Current Bus Driver Outputs
D Fanout (Over Temperature Range):
Standard Outputs . . . 10 LS−TTL Loads
Bus Driver Outputs . . 15 LS−TTL Loads
D Balanced Propagation Delay and Transition Times
D Significant Power Reduction Compared to LS−TTL Logic ICs
Absolute Maximum Ratings: (Note 1, Note 2)
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 to +7.0V
Clamp Diode Current, IIK, IOK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA
DC Drain Current (Per Output), IOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35mA
DC Output Source or Sink Current (Per Output), IOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25mA
DC VCC or GND Current (Per Pin), ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70mA
Maximum Junction, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65C to +150C
Typical Thermal Resistance, Junction−to−Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69C/W
Lead Temperature (During Soldering, 10sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300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.
Recommended Operating Conditions:
Parameter
Symbol
Min
Typ
Max
Unit
VCC
2.0
−
6.0
V
VIN, VOUT
0
−
VCC
V
Operating Temperature Range
TA
−40
−
+85
C
Input Rise or Fall Times
VCC = 2.0V
tr, tf
−
−
1000
ns
VCC = 4.5V
−
−
500
ns
VCC = 6.0V
−
−
400
ns
Supply Voltage
DC Input or Output Voltage
DC Electrical Characteristics:
TA = +25C
Parameter
Minimum HIGH Level Input Voltage
Maximum LOW Level Input Voltage
Minimum HIGH Level Output
Voltage
Minimum LOW Level Output
Voltage
Symbol
VIH
Test Conditions
VIL
VOH
VOL
VIN = VIH
or VIL
VIN = VIH
or VIL
TA = −40 to +85C
VCC
Typ
Guaranteed Limits
2.0
−
1.5
1.5
Unit
V
4.5
−
3.15
3.15
V
6.0
−
4.2
4.2
V
2.0
−
0.5
0.5
V
4.5
−
1.35
1.35
V
6.0
−
1.8
1.8
V
VCC VCC
−0.1
VCC
−0.1
IOUT = −20A
−
IOUT = −6mA
4.5
4.2
3.98
3.84
V
V
IOUT = −7.8mA
6.0
5.7
5.48
5.34
V
IOUT = 20A
−
0
0.1
0.1
V
IOUT = 6mA
4.5
0.2
0.26
0.33
V
IOUT = 7.8mA
6.0
0.2
0.26
0.33
V
Maximum Input Current
IIN
VIN = VCC or GND
6.0
−
0.1
1.0
A
Maximum Quiescent Supply Current
ICC
VIN = VCC or GND, IOUT = 0A
6.0
−
8.0
80
A
3−State Leakage Current
IOZ
VIN = VIH or VIL
6.0
−
0.5
0.5
A
AC Electrical Characteristics: (tr = tf = 6ns, CL = 50pF unless otherwise specified)
TA = +25C
Parameter
Propagation Delay (Data to Outputs)
NTE74HC240
Symbol
tPHL, tPLH
Test Conditions
CL = 15pF
NTE74HC240
CL = 15pF
Output Enable and Disable Times
tTHL, tTLH
TA = −40 to +85C
VCC
Typ
2.0
−
150
Guaranteed Limits
125
Unit
ns
4.5
−
20
25
ns
5.0
8
−
−
ns
6.0
−
17
21
ns
2.0
−
110
140
ns
4.5
−
22
28
ns
5.0
9
−
−
ns
6.0
−
19
24
ns
2.0
−
150
190
ns
4.5
−
30
38
ns
5.0
12
−
−
ns
6.0
−
26
33
ns
AC Electrical Characteristics (Cont’d): (tr = tf = 6ns, CL = 50pF unless otherwise specified)
TA = +25C
Parameter
Output Transition Time
Symbol
tTHL, tTLH
Maximum Input Capacitance
Test Conditions
CIN
Maximum 3−State Output Capacitance
COUT
Power Dissipation Capacitance
NTE74HC240
NTE74HC244
CPD
Note 3
TA = −40 to +85C
VCC
Typ
Guaranteed Limits
2.0
−
60
75
Unit
ns
4.5
−
12
15
ns
6.0
−
10
13
ns
−
−
10
10
pF
−
−
20
20
pF
5
5
−
−
38
46
−
−
PF
pF
Note 3. CPD is used to determine the dynamic power consumption, per channel.
PD = VCC2 fi (CPD + CL) where fi = Input Frequency, fO = Output Frequency,
CL = Output Load Capacitance, VCC = Supply Voltage.
Pin Connection Diagram
NTE74HC240
NTE74HC244
1OE 1
20 VCC
1OE 1
20 VCC
1 A0 2
2Y3 3
19 2OE
18 1Y0
1 A0 2
2Y3 3
19 2OE
18 1Y0
1 A1 4
17 2 A3
1 A1 4
17 2 A3
2Y2 5
16 1Y1
2Y2 5
16 1Y1
1 A2 6
2Y1 7
15 2 A2
14 1Y2
1 A2 6
15 2 A2
2Y1 7
14 1Y2
1 A3 8
13 2 A1
1 A3 8
13 2 A1
2Y0 9
12 1Y3
2Y0 9
12 1Y3
GND 10
11 2 A0
GND 10
11 2 A0
20
11
1
10
.300 (7.62)
.260 (6.6) Max
1.200 (30.5) Max
.200
(5.08)
Max
.012
(0.30)
.100 (2.54) Typ
.100 (2.54) Min
.350 (8.89)