HD74HCT08A
Quad. 2–input Positive AND Gates
ADE-205-289 (Z)
Description
The HD74HCT08A has four 2-input AND gates in a 14 pin package. Y = A•B or Y = A + B
Features
• VCC = 4.5 to 5.5 V operation
• Input terminal has protection diode
Function Table
1st. Edition
June 1999
Inputs Output Y
AB
HHH
LXL
XLL
H : High level
L : Low level
X : Immaterial
HD74HCT08A
Pin Arrangement
1A
14
1
V
CC
1B
1Y
2A
2B
2Y
GND
2
3
4
5
6
7
13
12
11
10
4B
4A
4Y
3B
9
3A
8
3Y
(Top view)
Absolute Maximum Ratings
Item Symbol Ratings Unit
Supply voltage V
Input diode peak current I
Output diode peak current I
Output current I
VCC, GND current / pin ICC or I
CC
IK
OK
O
GND
Storage temperature Tstg –65 to 150 °C
–0.5 to 7.0 V
±20 mA
±20 mA
±25 mA
±50 mA
2
HD74HCT08A
Recommended Operating Conditions
Item Symbol Min Typ Max Unit
Supply voltage V
Input voltage V
Output voltage V
Output current I
Input rise / fall time tr, t
CC
IH
V
IL
V
I
O
OH
I
OL
f
Operating temperature Ta –40 — 85 °C
4.5 5.0 5.5 V
2.0 — — V
0 — 0.8
0—V
CC
0—VCCV
—–4—mA
—4 —
— — 500 ns
3
HD74HCT08A
Logic Diagram (1/4 Circuit)
A
B
Electrical Characteristics
Y
Item Symbol V
(V) Ta = 25°C Ta = –40 to 85°C Unit Test Conditions
CC
Min Typ Max Min Max
Output voltage V
OH
4.5 4.40 — — 4.40 — V IO = –20 µA
4.5 3.98 — — 3.84 — IO = –4 mA
V
OL
4.5 — — 0.10 — 0.10 IO = 20 µA
4.5 — — 0.26 — 0.33 IO = 4 mA
Input current I
Quiescent supply
I
I
CC
5.5 — ±0.1 ±100 — ±1000 nA VI = VCC or GND
5.5 — — 2.0 — 20 µAVI = VCC or GND,
voltage
Switching Characteristics (CL = 50 pF)
Item Symbol V
Propagation t
delay time t
Output rise / fall t
time t
Input capacitance C
Power dissipation
PLH
PHL
r
f
I
C
PD
capacitance
(V) Ta = 25°C Ta = –40 to 85°C Unit Input Output
CC
Min Typ Max Min Max FROM TO
4.5 — 11 19 — 24 ns A or B Y
5.5 — 10 18 — 22
4.5 — 7 15 — 19 ns Each
5.5 — 6 13 — 16 output
— — 3 10 — 10 pF
— —20—— — pF
I
O
= 0
4
Test Circuit
HD74HCT08A
• Waveform
Input
Output
Input
V
CC
V
CC
Pulse Generator
Z = 50
out
Ω
Note: 1. C includes probe and jig capacitance.
L
t
r
90 %
10 %
t
PHL
1.3 V 1.3 V
90 %
1.3 V1.3 V
Output
C
L
t
f
3 V
10 %
t
PLH
0 V
V
OH
Note: 1. Input waveform : PRR = 1 MHz, duty cycle 50%, t = 6 ns, t = 6 ns
rf
V
OL
5
HD74HCT08A
Package Dimensions
14
1
1.27
10.06
10.5 Max
1.42 Max
Unit : mm
8
5.5
7
+ 0.20
7.80
– 0.30
2.20 Max
0.22 ± 0.05
1.15
0.20 ± 0.04
0° – 8°
0.70 ± 0.20
0.42 ± 0.08
0.40 ± 0.06
Dimension including the plating thickness
Base material dimension
0.12
0.10 ± 0.10
0.15
M
Hitachi Code
JEDEC
EIAJ
Weight
(reference value)
FP-14DA
—
Conforms
0.23 g
6
5.30 Max
14 8
17
+0.08
0.22
–0.07
0.20 ± 0.06
5.00
0.83 Max
0.65
0.13
HD74HCT08A
4.40
1.0
M
6.40 ± 0.20
0.10
1.10 Max
Dimension including the plating thickness
Base material dimension
0.17 ± 0.05
0.15 ± 0.04
+0.03
–0.04
0.07
0° – 8°
Hitachi Code
JEDEC
EIAJ
Weight
(reference value)
0.50 ± 0.10
TTP-14D
—
—
0.05 g
7
Cautions
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
Hitachi bears no responsibility for problems that may arise with third party’s rights, including
intellectual property rights, in connection with use of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
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written approval from Hitachi.
7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor
products.
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Copyright ' Hitachi, Ltd., 1999. All rights reserved. Printed in Japan.
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