HD74AC HITACHI [Hitachi Semiconductor], HD74AC Datasheet - Page 28

• Manufacturer Part Number: HD74AC
• Description: HD74AC Series Common Information
• Manufacturer: HITACHI [Hitachi Semiconductor]

Vmi = 50% V
Vmo = 50% V
3.6 Electrostatic Discharge
Precautions should be taken to prevent damage to devices by electrostatic discharge. Static charge tends to
accumulate on insulated surfaces such as synthetic fabrics or carpeting, plastic sheets, trays, foam, tubes or
bags, and on ungrounded electrical tools or appliances. The problem is much worse in a dry atmosphere.
In general, it is recommended that individuals take the precaution of touching a known ground before
handling devices. More often, handling equipment that is not properly grounded, causes damage to parts.
Ensure that all plastic parts of the tester, that are near the device, are conductive and connected to ground.
Vmi = 50% V
Vmo = 50% V
CC
CC
CC
CC
for HD74AC devices; 1.5 V for HD74ACT devices
for HD74AC devices; 1.5 V for HD74ACT devices
for HD74AC/HD74ACT devices
for HD74AC/HD74ACT devices
OUTPUT
CONTROL
DATA
OUT
Figure 6 3-State Output Low Enable and Disable Times
Figure 7 Setup Time, Hold Time and Recovery Time
DATA
IN
CONTROL
INPUT
MR
OR
CLEAR
t
ZL
Vmo
t
su
t
su
t
t
LZ
rec
Vmi
Vmi
Definition of Specifications
t
h
Vmi
10% V
Gnd
Vmi
CC
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