SN54BCT245, SN74BCT245

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCBS013F – SEPTEMBER 1988 – REVISED APRIL 1994

2–5

POST OFFICE BOX 655303

Figures 1 through 4 show the typical power dissipation for an SN74BCT245 over variations in outputs switching,

output frequency, and capacitive load.

VCC = 5.5 V

TA = 70°C

RL = 500 Ω

Air Flow = 0

CL = 15 pF

VCC = 5.5 V

TA = 70°C

RL = 500 Ω

Air Flow = 0

CL = 100 pF

VCC = 5.5 V

TA = 70°C

RL = 500 Ω

Air Flow = 0

CL = 150 pF

VCC = 5.5 V

TA = 70°C

RL = 500 Ω

Air Flow = 0

CL = 50 pF

f – Frequency – MHz

f – Frequency – MHz

f – Frequency – MHz

f – Frequency – MHz

10

20

30

40

750

600

450

300

150

900

Four Switching

10

20

30

40

1250

1000

750

500

250

1500

1250

1000

750

500

250

1500

10

20

30

40

10

20

30

40

Four Switching

One Switching

Four Switching

Eight Switching

Eight Switching

1000

800

600

400

200

1200

1050

0

050

1400

0

50

0

POWER DISSIPATION

vs

FREQUENCY

POWER DISSIPATION

vs

FREQUENCY

POWER DISSIPATION

vs

FREQUENCY

POWER DISSIPATION

vs

FREQUENCY

0

1750

050

1750

0

050

One Switching

Figure 1

Figure 2

Figure 3

Figure 4

Eight Switching

Four Switching

One Switching

One Switching

Eight Switching

† The dashed lines are for the DB package only.