NC7WZ38_05 datasheet(4/8 Pages) FAIRCHILD

Part #	NC7WZ38

Description	TinyLogic UHS Dual 2-Input NAND Gate (Open Drain Output)

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

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AC Electrical Characteristics

Note 3: CPD is defined as the value of the internal equivalent capacitance which is derived from dynamic operating current consumption (ICCD) at no output

loading and operating at 50% duty cycle. (See Figure 2.) CPD is related to ICCD dynamic operating current by the expression:

ICCD = (CPD) (VCC) (fIN) + (ICC static).

AC Loading and Waveforms

CL includes load and stray capacitance

Input PRR

= 1.0 MHz; t

w = 500 ns

FIGURE 1. AC Test Circuit

Input

= AC Waveform; t

r = tf = 1.8 ns

PRR

= 10 MHz; Duty Cycle = 50%

FIGURE 2. ICCD Test Circuit

FIGURE 3. AC Waveforms

Symbol

Parameter

VCC

TA = +25°CTA = −40°C to +85°C

Units

Conditions

Figure

(V)

Min

Typ

Max

Min

Max

Number

tPZL

Propagation Delay

1.8

± 0.15

2.0

5.2

9.2

2.0

9.6

ns

CL = 50 pF

2.5

± 0.2

1.5

3.5

5.7

1.5

6.1

RU

= 500Ω

Figures

1, 3

3.3

± 0.3

1.0

2.8

4.1

1.0

4.5

RD

= 500Ω

5.0

± 0.5

0.5

2.2

3.4

0.5

3.6

VI = 2 × VCC

tPLZ

Propagation Delay

1.8

± 0.15

2.0

4.6

9.2

2.0

9.6

ns

CL = 50 pF

2.5

± 0.2

1.5

3.2

5.7

1.5

6.1

RU

= 500Ω

Figures

1, 3

3.3

± 0.3

1.0

2.4

4.1

1.0

4.5

RD

= 500Ω

5.0

± 0.5

0.5

1.6

3.4

0.5

3.6

VI = 2 × VCC

CIN

Input Capacitance

0

2.5

pF

COUT

Output Capacitance

0

4.2

pF

CPD

Power Dissipation

3.3

7

pF

(Note 3)

Figure 2

Capacitance

5.0

9

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