DM74LS670N datasheet(4/6 Pages) FAIRCHILD

Il numero della parte	DM74LS670N

Spiegazioni elettronici	3-STATE 4-by-4 Register File

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Produttore elettronici	FAIRCHILD [Fairchild Semiconductor]

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Electrical Characteristics

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

Note 8: All typicals are at VCC = 5V, TA = 25°C.

Note 9: Not more than one output should be shorted at a time, and the duration should not exceed one second.

Note 10: ICC is measured with 4.5V applied to all DATA inputs and both ENABLE inputs, all ADDRESS inputs are grounded and all outputs are OPEN.

Switching Characteristics

at VCC = 5V and TA = 25°C

Note 11: CL = 5 pF.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

(Note 8)

VI

Input Clamp Voltage

VCC = Min, II = −18 mA

−1.5

V

VOH

HIGH Level

VCC = Min, IOH = Max

2.4

3.4

V

Output Voltage

VIL = Max, VIH = Min

VOL

LOW Level

VCC = Min, IOL = Max

0.34

0.5

V

Output Voltage

IOL = Max, VIH = Min

II

Input Current @ Max

VCC = Max

D, R or W

0.1

Input Voltage

VI = 7V

GW

0.2

mA

GR

0.3

IIH

HIGH Level

VCC = Max

D, R or W

20

Input Current

VI = 2.7V

GW

40

µA

GR

60

IIL

LOW Level

VCC = Max

D, R or W

−0.4

Input Current

VI = 0.4V

GW

−0.8

mA

GR

−1.2

IOZH

Off-State Output Current with

VCC = Max, VO = 2.7V

20

µA

HIGH Level Output Voltage Applied VIH = Min, VIL = Max

IOZL

Off-State Output Current with

VCC = Max, VO = 0.4V

−20

µA

LOW Level Output Voltage Applied VIH = Min, VIL = Max

IOS

Short Circuit Output Current

VCC = Max (Note 9)

−20

−100

mA

ICC

Supply Current

VCC = Max (Note 10)

30

50

mA

RL = 667Ω

Symbol

Parameter

From (Input)

CL = 45 pF

CL = 150 pF

Units

To (Output)

Min

Max

Min

Max

tPLH

Propagation Delay Time

Read Select to Q

40

50

ns

LOW-to-HIGH Level Output

tPHL

Propagation Delay Time

Read Select to Q

45

55

ns

HIGH-to-LOW Level Output

tPLH

Propagation Delay Time

Write Enable to Q

45

55

ns

LOW-to-HIGH Level Output

tPHL

Propagation Delay Time

Write Enable to Q

50

60

ns

HIGH-to-LOW Level Output

tPLH

Propagation Delay Time

Data to Q

45

55

ns

LOW-to-HIGH Level Output

tPHL

Propagation Delay Time

Data to Q

40

50

ns

HIGH-to-LOW Level Output

tPZH

Output Enable Time

Read Enable to Any Q

35

45

ns

to HIGH Level Output

tPZL

Output Enable Time

Read Enable to Any Q

40

50

ns

to LOW Level Output

tPHZ

Output Disable Time from

Read Enable to Any Q

50

ns

HIGH Level Output (Note 11)

tPLZ

Output Disable Time from

Read Enable to Any Q

35

ns

LOW Level Output (Note 11)

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