74AC646 datasheet(5/10 Pages) FAIRCHILD

Part #	74AC646

Description	Octal Transceiver/Register with 3-STATE Outputs

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

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DC Electrical Characteristics for ACT

Note 6: All outputs loaded; thresholds on input associated with output under test.

Note 7: Maximum test duration 2.0 ms, one output loaded at a time.

AC Electrical Characteristics for AC

Symbol

Parameter

VCC

TA = +25°C

TA = −40°C to +85°C

Units

Conditions

(V)

Typ

Guaranteed Limits

VIH

Minimum HIGH Level

4.5

1.5

2.0

V

VOUT = 0.1V

Input Voltage

5.5

1.5

2.0

or VCC − 0.1V

VIL

Maximum LOW Level

4.5

1.5

0.8

V

VOUT = 0.1V

Input Voltage

5.5

1.5

0.8

or VCC − 0.1V

VOH

Minimum HIGH Level

4.5

4.49

4.4

V

IOUT = −50 µA

Output Voltage

5.5

5.49

5.4

VIN = VIL or VIH

4.5

3.86

3.76

V

IOH= −24 mA

5.5

4.86

4.76

IOH= −24 mA (Note 6)

VOL

Maximum LOW Level

4.5

0.001

0.1

V

IOUT = 50 µA

Output Voltage

5.5

0.001

0.1

VIN = VIL or VIH

4.5

0.36

0.44

V

IOL= 24 mA

5.5

0.36

0.44

IOL = 24 mA (Note 6)

Maximum Input

Leakage Current

5.5

± 0.1

± 1.0

µAV

I = VCC, GND

Maximum

ICC/Input

5.5

0.6

1.5

mA

VI = VCC − 2.1V

IOLD

Minimum Dynamic

5.5

75

mA

VOLD = 1.65V Max

IOHD

Output Current (Note 7)

5.5

−75

mA

VOHD = 3.85V Min

ICC

Maximum Quiescent

5.5

8.0

80.0

µA

VIN = VCC

Supply Current

or GND

IOZT

Maximum I/O

VI (OE) = VIL, VIH

Leakage Current

5.5

±0.6

±6.0

µAV

I = VCC, GND

VO = VCC, GND

VCC

TA = +25°CTA = −40°C to +85°C

Symbol

Parameter

(V)

CL = 50 pF

Units

(Note 8)

Min

Typ

Max

Min

Max

tPLH

Propagation Delay

3.3

4.0

10.5

16.5

3.0

18.5

ns

Clock to Bus

5.0

2.5

7.5

12.0

2.0

13.0

tPHL

Propagation Delay

3.3

3.0

9.5

14.5

2.5

16.0

ns

Clock to Bus

5.0

2.0

6.5

10.5

1.5

11.5

tPLH

Propagation Delay

3.3

2.5

7.5

12.0

2.0

13.5

ns

Bus to Bus

5.0

1.5

5.0

8.0

1.0

9.0

tPHL

Propagation Delay

3.3

1.5

7.5

12.5

1.5

13.5

ns

Bus to Bus

5.0

1.5

5.0

9.0

1.0

9.5

tPLH

Propagation Delay

3.3

2.0

8.5

13.5

1.5

15.5

SBA or SAB to An or Bn

5.0

1.5

6.0

10.0

1.5

11.0

ns

(w/ An or Bn HIGH or LOW)

tPHL

Propagation Delay

3.3

1.5

8.5

13.5

1.5

15.0

SBA or SAB to An or Bn

5.0

1.5

6.0

10.0

1.5

11.0

ns

(w/ An or Bn HIGH or LOW)

tPZH

Enable Time

3.3

2.5

7.0

11.5

2.0

12.5

ns

G to An or Bn

5.0

1.5

5.0

8.5

1.5

9.0

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