74HC42 Datasheet, PDF (5/6 Pages) NXP Semiconductors – BCD to decimal decoder 1-of-10

Philips Semiconductors
BCD to decimal decoder (1-of-10)
Product specification
74HC/HCT42
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I_CC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
SYMBOL PARAMETER
74HC
+25
−40 to +85
min. typ. max. min. max.
t_PHL/ t_PLH propagation delay
A_n to Y_n
47 150
190
17 30
38
14 26
33
t_THL/ t_TLH output transition time
19 75
95
7 15
19
6 13
16
TEST CONDITIONS
−40 to +125
UNIT _VCC WAVEFORMS
(V)
min. max.
225 ns
45
38
2.0 Fig.6
4.5
6.0
110 ns
22
19
2.0 Fig.6
4.5
6.0
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I_CC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆I_CC) for a unit load of 1 is given in the family specifications.
To determine ∆I_CC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT UNIT LOAD COEFFICIENT
A_n
1.0
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
74HCT
+25
−40 to +85 −40 to +125
min. typ. max. min. max. min. max.
UNIT
V_CC ^WAVEFORMS
(V)
t_PHL/ t_PLH propagation delay
20 35
44
53 ns
4.5 Fig.6
A_n to Y_n
t_THL/ t_TLH output transition time
7 15
19
22 ns
4.5 Fig.6
December 1990
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