HD74AC HITACHI [Hitachi Semiconductor], HD74AC Datasheet - Page 8

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

1.8 Choice of Voltage Specifications
To obtain better performance and higher density, semiconductor technologies are reducing the vertical and
horizontal dimensions of integrated device structures. Due to a number of electrical limitations in the
manufacture of VLSI devices and the need for low-voltage operation in memory cards, the JEDEC
committee decided to establish interface standards for devices operating at 3.3 V 0.3 V. To this end,
Hitachi guarantees all of its devices operational at 3.3 V 0.3 V. Note also that AC and DC specifications
are guaranteed between 3.0 and 5.5 V. Operation of FACT logic is also guaranteed from 2.0 to 6.0 V on
V
Operating Voltage Ranges
1.9 FACT Replaces LS, ALS, HCMOS
The Advanced CMOS family is specifically designed to outperform the LS, ALS, and HCMOS families.
Figure 8 shows the relative position of various logic families in speed/power performance.
Table 1 summarizes the key performance specifications for various competitive technology logic families.
Table 2 compares propagation delays.
CC
FACT = 2.0 to 6.0 V
ALS = 5.0 V 10%
LS = 5.0 V 5%
HC = 2.0 to 6.0 V
.
–1
–2
7
6
5
4
3
2
1
0
–0.2
Figure 7 Input Characteristics V
FACT Descriptions and Family Characteristics
V
–0.1
CC
= 5.0 V, Ta = 25 C
Current (mA)
0
0.1
V
IN
IN
/I
/I
IN
IN
0.2
7