SN54HCT139, SN74HCT139

DUAL 2LINE TO 4LINE DECODERS/DEMULTIPLEXERS

SCLS066D − MARCH 1982 − REVISED SEPTEMBER 2003

4

POST OFFICE BOX 655303

(unless otherwise noted) (see Figure 1)

PARAMETER

FROM

TO

VCC

TA = 25°C

SN54HCT139

SN74HCT139

UNIT

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

A or B

Y

4.5 V

14

34

51

43

tpd

A or B

Y

5.5 V

12

30

50

40

ns

tpd

G

Y

4.5 V

11

34

51

43

ns

G

Y

5.5 V

10

30

50

40

tt

Y

4.5 V

8

15

22

19

ns

tt

Y

5.5 V

6

14

21

17

ns

PARAMETER

TEST CONDITIONS

TYP

UNIT

Cpd

Power dissipation capacitance per decoder

No load

25

pF

PARAMETER MEASUREMENT INFORMATION

VOLTAGE WAVEFORM

INPUT RISE AND FALL TIMES

1.3 V

1.3 V

0.3 V

0.3 V

2.7 V

2.7 V

3 V

0 V

tr

tf

Input

VOLTAGE WAVEFORMS

PROPAGATION DELAY AND OUTPUT RISE AND FALL TIMES

1.3 V

1.3 V

1.3 V

10%

10%

90%

90%

3 V

VOH

VOL

0 V

tr

tf

Input

In-Phase

Output

1.3 V

tPLH

tPHL

1.3 V

1.3 V

10%

10%

90%

90%

VOH

VOL

tr

tf

tPHL

tPLH

Out-of-Phase

Output

Test

Point

From Output

Under Test

LOAD CIRCUIT

NOTES: A. CL includes probe and test-fixture capacitance.

B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following

characteristics: PRR

≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns.

C. The outputs are measured one at a time with one input transition per measurement.

D. tPLH and tPHL are the same as tpd.

CL = 50 pF

(see Note A)

Figure 1. Load Circuit and Voltage Waveforms

PRODUCT PREVIEW information concerns products in the formative or

design phase of development. Characteristic data and other

specifications are design goals. Texas Instruments reserves the right to

change or discontinue these products without notice.