Hitachi HD74HCT125 Quad. bus buffer gates (with 3-state outputs) Datasheet

HD74HCT125/HD74HCT126
Quad. Bus Buffer Gates (with 3-state outputs)
Description
The HD74HCT125, HD74HCT126 require the 3-state control input C to be taken high to put the output
into the high impedance condition, whereas the HD74HCT125, HD74HCT126 requires the control input to
be low to put the output into high impedance.
Features
•
•
•
•
•
•
LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility
High Speed Operation: tpd (A to Y) = 12 ns typ (CL = 50 pF)
High Output Current: Fanout of 15 LSTTL Loads
Wide Operating Voltage: VCC = 4.5 to 5.5 V
Low Input Current: 1 µA max
Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
Input
C
Output Y
HCT125
HCT126
A
HD74HCT125
HD74HCT126
H
L
X
Z
Z
L
H
L
L
L
L
H
H
H
H
Notes: X: Irrelevant
Z: Off (High-impedance) state of a 3-state output.
HD74HCT125/HD74HCT126
Pin Arrangement
HD74HCT125
1C
1
14
VCC
1A
2
13
4C
1Y
3
12
4A
2C
4
11
4Y
2A
5
10
3C
2Y
6
9
3A
GND
7
8
3Y
(Top view)
HD74HCT126
1C
1
14
VCC
1A
2
13
4C
1Y
3
12
4A
2C
4
11
4Y
2A
5
10
3C
2Y
6
9
3A
GND
7
8
3Y
(Top view)
2
HD74HCT125/HD74HCT126
Absolute Maximum Ratings
Item
Symbol
Rating
Unit
Supply voltage range
VCC
–0.5 to +7.0
V
Input voltage
VIN
–0.5 to VCC + 0.5
V
Output voltage
VOUT
–0.5 to VCC + 0.5
V
Output current
I OUT
±35
mA
DC current drain per VCC, GND
I CC, I GND
±75
mA
DC input diode current
I IK
±20
mA
DC output diode current
I OK
±20
mA
Power dissipation per package
PT
500
mW
Storage temperature
Tstg
–65 to +150
°C
DC Characteristics
Ta = –40 to
+85°C
Ta = 25°C
Test Conditions
Item
Symbol
Min Typ Max Min
Max
Unit
VCC (V)
Input voltage
VIH
2.0
—
—
—
V
4.5 to
5.5
VIL
—
—
0.8 —
0.8
V
4.5 to
5.5
VOH
4.4
—
—
4.4
—
V
4.5
Vin = VIH or VIL I OH = –20 µA
4.18 —
—
4.13
—
4.5
I OH = –6 mA
—
—
0.1 —
0.1
—
—
0.26 —
0.33
Output voltage
VOL
2.0
V
4.5
Vin = VIH or VIL I OL = 20 µA
4.5
I OL = 6 mA
Off-state output
current
I OZ
—
—
±0.5 —
±5.0
µA
5.5
Vin = VIH or VIL,
Vout = VCC or GND
Input current
Iin
—
—
±0.1 —
±1.0
µA
5.5
Vin = VCC or GND
Quiescent supply
current
I CC
—
—
4.0 —
40
µA
5.5
Vin = VCC or GND, Iout = 0 µA
3
HD74HCT125/HD74HCT126
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = –40 to
+85°C
Ta = 25°C
Test Conditions
Min Typ Max Min
Max
Unit
VCC (V)
Propagation delay t PHL
—
12
20
—
25
ns
4.5
time
t PLH
—
12
20
—
25
Output enable
t ZL
—
12
30
—
38
time
t ZH
—
12
30
—
38
Output disable
t LZ
—
15
30
—
38
time
t HZ
—
15
30
—
38
Output rise/fall
t TLH
—
4
12
—
15
time
t THL
—
4
12
—
15
Input capacitance
Cin
—
5
10
—
10
Item
4
Symbol
4.5
ns
4.5
4.5
ns
4.5
4.5
ns
4.5
4.5
pF
—
Unit: mm
19.20
20.32 Max
8
6.30
7.40 Max
14
1.30
7
2.54 ± 0.25
0.48 ± 0.10
0.51 Min
2.39 Max
2.54 Min 5.06 Max
1
7.62
+ 0.10
0.25 – 0.05
0° – 15°
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
DP-14
Conforms
Conforms
0.97 g
Unit: mm
10.06
10.5 Max
8
5.5
14
1
0.10 ± 0.10
1.42 Max
1.27
*0.42 ± 0.08
0.40 ± 0.06
*0.22 ± 0.05
0.20 ± 0.04
2.20 Max
7
+ 0.20
7.80 – 0.30
1.15
0° – 8°
0.70 ± 0.20
0.15
0.12 M
*Dimension including the plating thickness
Base material dimension
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
FP-14DA
—
Conforms
0.23 g
Unit: mm
8.65
9.05 Max
8
1
7
*0.20 ± 0.05
0.635 Max
1.75 Max
3.95
14
+ 0.10
6.10 – 0.30
1.08
*0.40 ± 0.06
0.11
0.14 +– 0.04
0° – 8°
1.27
0.67
0.60 +– 0.20
0.15
0.25 M
*Pd plating
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
FP-14DN
Conforms
Conforms
0.13 g
Unit: mm
4.40
5.00
5.30 Max
14
8
1
7
0.65
0.20 ± 0.06
1.0
0.13 M
6.40 ± 0.20
0.10
*Dimension including the plating thickness
Base material dimension
*0.17 ± 0.05
0.15 ± 0.04
1.10 Max
0.83 Max
0.07 +0.03
–0.04
*0.22+0.08
–0.07
0° – 8°
0.50 ± 0.10
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
TTP-14D
—
—
0.05 g
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