DM74AS640 datasheet(2/5 Pages) FAIRCHILD

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Absolute Maximum Ratings(Note 1)

Note 1: The “Absolute Maximum Ratings” are those values beyond which

the safety of the device cannot be guaranteed. The device should not be

operated at these limits. The parametric values defined in the Electrical

Characteristics tables are not guaranteed at the absolute maximum ratings.

The “Recommended Operating Conditions” table will define the conditions

for actual device operation.

Recommended Operating Conditions

Electrical Characteristics

over recommended operating free air temperature range (unless otherwise noted)

Note 2: All typicals are at VCC = 5.0V, TA = 25°C.

Note 3: For I/O ports, the parameters IIH and IIL include the OFF-State output current, IOZH and IOZL.

Supply Voltage

Input Voltage

Control Inputs

I/O Ports

5.5V

Operating Free Air Temperature Range

°C to +70°C

Storage Temperature Range

−65°C to +150°C

Typical

N Package

51.5

°C

M Package

69.0

°C

Symbol

Parameter

Min

Typ

Max

Units

VCC

Supply Voltage

4.5

5.5

VIH

HIGH Level Input Voltage

VIL

LOW Level Input Voltage

0.8

IOH

HIGH Level Output Current

−15

IOL

LOW Level Output Current

Free Air Operating Temperature

°C

Symbol

Parameter

Conditions

Min

Typ

Max

Units

(Note 2)

Input Clamp Voltage

VCC = Min, II = −18 mA

−1.2

VOH

HIGH Level

VCC = 4.5V to 5.5V, IOH = −2 mA

VCC − 2V

Output Voltage

VCC = 4.5V, IOH = −3 mA

2.4

VCC = 4.5V, IOH = Max

2.4

VOL

LOW Level Output Voltage

VCC = Min, IOL = Max

0.35

0.55

Input Current at Max

VCC = Max, VI = 7V,

0.1

Input Voltage

(VI = 5.5V for A or B Ports)

IIH

HIGH Level

VCC = Max

Control Inputs

µA

Input Current

VI = 2.7V (Note 3)

A or B Ports

IIL

LOW Level

VCC = Max,

Control Inputs

−0.5

Input Current

VI = 0.4V (Note 3)

A or B Ports

−0.75

Output Drive Current

VCC = Max, VO = 2.25V

−50

−150

ICCH

Supply Current with Outputs HIGH

VCC = Max

ICCL

Supply Current with Outputs LOW

123

ICCZ

Supply Current with Outputs

in 3-STATE

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