74LVT245 查看數據表（PDF） - Fairchild Semiconductor

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74LVT245

Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs

Fairchild Semiconductor 

DC Electrical Characteristics (Continued)

Symbol

Parameter

VCC

TA 40qC to 85qC

Units

(V)

Min

Max

Conditions

IOZH (Note 4) 3-STATE Output Leakage Current

3.6

IOZH

3-STATE Output Leakage Current

3.6

5

PA

VO 3.6V

10

PA

VCC  VO d 5.5V

ICCH

Power Supply Current

3.6

0.19

mA Outputs HIGH

ICCL

ICCZ

ICCZ

Power Supply Current

Power Supply Current

Power Supply Current

3.6

5

mA Outputs LOW

3.6

0.19

mA Outputs Disabled

3.6

0.19

mA

VCC d VO d 5.5V,

Outputs Disabled

'ICC

Increase in Power Supply Current

3.6

(Note 7)

0.2

mA

One Input at VCC  0.6V

Other Inputs at VCC or GND

Note 4: Applies to Bushold versions only (LVTH245).

Note 5: An external driver must source at least the specified current to switch from LOW-to-HIGH.

Note 6: An external driver must sink at least the specified current to switch from HIGH-to-LOW.

Note 7: This is the increase in supply current for each input that is at the specified voltage level rather than VCC or GND.

Dynamic Switching Characteristics (Note 8)

Symbol

Parameter

VCC

TA 25qC

(V)

Min

Typ

Max

VOLP

Quiet Output Maximum Dynamic VOL

3.3

0.8

VOLV

Quiet Output Minimum Dynamic VOL

3.3

0.8

Note 8: Characterized in SOIC package. Guaranteed parameter, but not tested.

Note 9: Max number of outputs defined as (n). n1 data inputs are driven 0V to 3V. Output under test held LOW.

Units

V

V

Conditions

CL 50 pF, RL 500:

(Note 9)

(Note 9)

AC Electrical Characteristics

TA 40qC to 85qC

Symbol

Parameter

CL 50 pF, RL 500:

VCC 3.3V r 0.3V

VCC 2.7V

Units

Min

Max

Min

Max

tPLH

Propagation Delay

tPHL

1.2

3.6

1.2

4.0

ns

1.2

3.5

1.2

4.0

tPZH

tPZL

Output Enable Time

1.3

5.5

1.3

7.1

ns

1.7

5.7

1.7

6.7

tPHZ

tPLZ

Output Disable

2.0

5.9

2.0

6.5

ns

2.0

5.0

2.0

5.1

tOSHL

tOSLH

Output to Output Skew

(Note 10)

1.0

1.0

ns

Note 10: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The

specification applies to any outputs switching in the same direction, either HIGH-to-LOW (tOSHL) or LOW-to-HIGH (tOSLH).

Capacitance (Note 11)

Symbol

Parameter

Conditions

CIN

Input Capacitance

CI/O

Input/Output Capacitance

Note 11: Capacitance is measured at frequency f

VCC 0V, VI 0V or VCC

VCC 3.0V, VO 0V or VCC

1 MHz, per MIL-STD-883, Method 3012.

Typical

4

8

Units

pF

pF

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