M54HCT139 Datasheet, PDF (4/9 Pages) STMicroelectronics – DUAL 2 TO 4 DECODER/DEMULTIPLEXER

M54/M74HCT139
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Symbol
Parameter
Test Conditions
VCC
(V)
TA = 25 ^oC
54HC and 74HC
Value
-40 to 85 ^oC -55 to 125 ^oC _Unit
74HC
54HC
Min. Typ. Max. Min. Max. Min. Max.
t_TLH Output Transition 4.5
t_THL Time
8
15
19
22
ns
tPLH Propagation
4.5
t_PHL Delay Time
(A, B - Y)
19 30
38
45
ns
tPLH Propagation
4.5
t_PHL Delay Time
(G - Y)
17 27
34
41
ns
CIN Input Capacitance
5
10
10
10 pF
CPD (*) Power Dissipation
40
pF
Capacitance
(*) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the following equation. ICC(opr) = CPD •VCC •fIN + ICC/2 (per decoder)
SWITCHING CHARACTERISTICS TEST CIR-
CUIT
TEST CIRCUIT I_CC (Opr.)
INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF
SWITCHING CHARACTERISTICSTEST.
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