Nexperia
74HC137
3-to-8 line decoder, demultiplexer with address latches; inverting
Table 7. Dynamic characteristics …continued
GND = 0 V; tr = tf = 6 ns; CL = 50 pF.
Symbol Parameter
Conditions
th
hold time
An to LE; see Figure 8
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
[1] tpd is the same as tPHL, tPLH.
[2] tt is the same as tTHL and tTLH.
[3] CPD is used to determine the dynamic power dissipation (PD in W).
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.
11. Waveforms
Min
Typ
Max Unit
-
-
45 ns
-
-
9 ns
-
-
8 ns
$Q(LQSXW 90
<QRXWSXW
W3+/
90
W3/+
W7+/
W7/+
DDE
Fig 6.
VM = 0.5 VI.
Waveforms showing the address input (An) and enable input (E2) to output (Yn) propagation delays and
the output transition times
74HC137
Product data sheet
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Rev. 4 — 23 December 2015
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