MM74C922N datasheet(5/11 Pages) FAIRCHILD

Part #	MM74C922N

Description	16-Key Encoder ??20-Key Encoder

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

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DC Electrical Characteristics (Continued)

AC Electrical Characteristics (Note 3)

TA = 25°C, CL = 50 pF, unless otherwise noted

Note 3: AC Parameters are guaranteed by DC correlated testing.

Note 4: Capacitance is guaranteed by periodic testing.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

VOUT(0)

Logical “0” Output Voltage

IO = −360 µA

VCC = 4.75V

0.4

V

IO = −360 µA

OUTPUT DRIVE (See Family Characteristics Data Sheet) (Short Circuit Current)

ISOURCE

Output Source Current

VCC = 5V, VOUT = 0V,

−1.75

−3.3

mA

(P-Channel)

TA = 25°C

ISOURCE

Output Source Current

VCC = 10V, VOUT = 0V,

−8

−15

mA

(P-Channel)

TA = 25°C

ISINK

Output Sink Current

VCC = 5V, VOUT = VCC,

1.75

3.6

mA

(N-Channel)

TA = 25°C

ISINK

Output Sink Current

VCC = 10V, VOUT = VCC,

8

16

mA

(N-Channel)

TA = 25°C

Symbol

Parameter

Conditions

Min

Typ

Max

Units

tpd0, tpd1

Propagation Delay Time to

CL = 50 pF (Figure 1)

Logical “0” or Logical “1”

VCC = 5V

60

150

ns

from D.A.

VCC = 10V

35

80

ns

VCC = 15V

25

60

ns

t0H, t1H

Propagation Delay Time from

RL = 10k, CL = 10 pF (Figure 2)

Logical “0” or Logical “1”

VCC = 5V, RL = 10k

80

200

ns

into High Impedance State

VCC = 10V, C L = 10 pF

65

150

ns

VCC = 15V

50

110

ns

tH0, tH1

Propagation Delay Time from

RL = 10k, CL = 50 pF (Figure 2)

High Impedance State to a

VCC = 5V, RL = 10k

100

250

ns

Logical “0” or Logical “1”

VCC = 10V, CL = 50 pF

55

125

ns

VCC = 15V

40

90

ns

CIN

Input Capacitance

Any Input (Note 4)

5

7.5

pF

COUT

3-STATE Output Capacitance

Any Output (Note 4)

10

pF

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