Datasheet

 
    
SCLS066D − MARCH 1982 − REVISED SEPTEMBER 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
V
CC
T
A
= 25°C SN54HCT139 SN74HCT139
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
A or B
Y
4.5 V 14 34 51 43
t
pd
A or B Y
5.5 V 12 30 50 40
ns
t
pd
G
Y
4.5 V 11 34 51 43
ns
G
Y
5.5 V 10 30 50 40
t
t
Y
4.5 V 8 15 22 19
ns
t
t
Y
5.5 V 6 14 21 17
ns
operating characteristics, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance per decoder No load 25 pF
PARAMETER MEASUREMENT INFORMATION
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
1.3 V1.3 V
0.3 V0.3 V
2.7 V 2.7 V
3 V
0 V
t
r
t
f
Input
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT RISE AND FALL TIMES
1.3 V
1.3 V1.3 V
10%10%
90% 90%
3 V
V
OH
V
OL
0 V
t
r
t
f
Input
In-Phase
Output
1.3 V
t
PLH
t
PHL
1.3 V 1.3 V
10% 10%
90%90%
V
OH
V
OL
t
r
t
f
t
PHL
t
PLH
Out-of-Phase
Output
Test
Point
From Output
Under Test
LOAD CIRCUIT
NOTES: A. C
L
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, Z
O
= 50 Ω, t
r
= 6 ns, t
f
= 6 ns.
C. The outputs are measured one at a time with one input transition per measurement.
D. t
PLH
and t
PHL
are the same as t
pd
.
C
L
= 50 pF
(see Note A)
Figure 1. Load Circuit and Voltage Waveforms
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