74HC137DB View Datasheet(PDF) -
74HC137DB Datasheet PDF : 0 Pages
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Philips Semiconductors
74HC137
3-to-8 line decoder, demultiplexer with address latches; inverting
Table 8: Dynamic characteristics …continued
GND = 0 V; tr = tf = 6 ns; CL = 50 pF.
Symbol Parameter
Conditions
Tamb = −40 °C to +125 °C
tPHL, tPLH propagation delay An to Yn
propagation delay LE to Yn
see Figure 6
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
see Figure 7
propagation delay E1 to Yn
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
see Figure 7
propagation delay E2 to Yn
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
see Figure 6
tTHL, tTLH output transition time
tW
LE pulse width HIGH
tsu
set-up time An to LE
th
hold time An to LE
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
see Figure 6
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
see Figure 8
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
see Figure 8
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
see Figure 8
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
[1] CPD is used to determine the dynamic power dissipation (PD in µW).
PD = CPD × VCC2 × fi × N + ∑(CL × VCC2 × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
∑(CL × VCC2 × fo) = sum of outputs.
9397 750 13804
Product data sheet
Rev. 03 — 11 November 2004
Min
Typ
Max
Unit
-
-
270
ns
-
-
54
ns
-
-
46
ns
-
-
285
ns
-
-
57
ns
-
-
48
ns
-
-
220
ns
-
-
44
ns
-
-
38
ns
-
-
220
ns
-
-
44
ns
-
-
38
ns
-
-
110
ns
-
-
22
ns
-
-
19
ns
-
-
75
ns
-
-
15
ns
-
-
13
ns
-
-
75
ns
-
-
15
ns
-
-
13
ns
-
-
45
ns
-
-
9
ns
-
-
8
ns
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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