MC74VHCT138A

MOTOROLA

VHC Data – Advanced CMOS Logic

DL203 — Rev 1

4

Sb l

P

T

C

di i

TA = 25°C

TA = – 40 to 85°C

Ui

Symbol

Parameter

Test Conditions

Min

Typ

Max

Min

Max

Unit

tPLH,

tPHL

Maximum Propagation Delay,

A to Y

VCC = 5.0 ± 0.5V

CL = 15pF

CL = 50pF

7.6

8.1

10.4

11.4

1.0

1.0

12.0

13.0

ns

tPLH,

tPHL

Maximum Propagation Delay,

E3 to Y

VCC = 5.0 ± 0.5V

CL = 15pF

CL = 50pF

6.6

7.1

9.1

10.1

1.0

1.0

10.5

11.5

ns

tPLH,

tPHL

Maximum Propagation Delay,

E2 or E1 to Y

VCC = 5.0 ± 0.5V

CL = 15pF

CL = 50pF

7.0

7.5

9.6

10.6

1.0

1.0

11.0

12.0

ns

Cin

Maximum Input Capacitance

4

10

10

pF

C

P

Di

i

i

C

i

(N

NO TAG)

Typical @ 25

°C, VCC = 5.0V

F

CPD

Power Dissipation Capacitance (Note NO TAG)

49

pF

1. CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.

power consumption; PD = CPD  VCC2  fin + ICC  VCC.

Figure 1.

1.5V

tPHL

tPLH

3V

GND

Figure 2.

VALID

VALID

Y

GND

tPLH

Y

E3

tPHL

1.5V

A

SWITCHING WAVEFORMS

3V

tPHL

tPLH

Y

E2 or E1

1.5V

Figure 3.

* Includes all probe and jig capacitance

Figure 4. Test Circuit

CL*

TEST POINT

DEVICE

UNDER

TEST

OUTPUT

GND

VOL

TEST CIRCUIT

VOH

1.5V

1.5V

VOL

VOH

1.5V

3V

VOL

VOH