74HC20 Datasheet, PDF (6/6 Pages) NXP Semiconductors – Dual 4-input NAND gate

Philips Semiconductors
Dual 4-input NAND gate
Product specification
74HC/HCT20
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I_CC category: SSI
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
nA, nB, nC, nD
UNIT LOAD COEFFICIENT
0.3
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
UNIT
V_CC
(V)
WAVEFORMS
min. typ. max. min. max. min. max.
t_PHL/ t_PLH propagation delay
16 28
35
42 ns 4.5 Fig.7
nA, nB, nC, nD to nY
t_THL/ t_TLH output transition time
7 15
19
22 ns 4.5 Fig.7
AC WAVEFORMS
(1) HC : V_M = 50%; V_I = GND to V_CC.
HCT: V_M = 1.3 V; V_I = GND to 3 V.
Fig.7 Waveforms showing the enable input (nA, nB, nC, nD) to output (nY) propagation delays and the output
transition times.
PACKAGE OUTLINES
See “74HC/HCT/HCU/HCMOS Logic Package Outlines”.
December 1990
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