HD74AC Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HD74AC

HD74AC Series Common Information

Hitachi -> Renesas Electronics 

FACT Descriptions and Family Characteristics

7

6

5

4

3

2

1

0

–1

–2

–0.2

VCC = 5.0 V, Ta = 25°C

VIN/IIN

–0.1

0

0.1

0.2

Current (mA)

Figure 7 Input Characteristics VIN/IIN

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

VCC.

Operating Voltage Ranges

• FACT = 2.0 to 6.0 V

• ALS = 5.0 V ±10%

• LS = 5.0 V ±5%

• HC = 2.0 to 6.0 V

1.9 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.

7

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