74HCHCT21 Datasheet, PDF (6/6 Pages) NXP Semiconductors – Dual 4-input AND gate

Philips Semiconductors
Dual 4-input AND gate
Product specification
74HC/HCT21
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
1.50
1.50
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
min.
74HCT
+25
−40 to+85
typ. max. min. max.
−40 to+125
UNIT
V_CC
(V)
min. max.
WAVEFORMS
t_PHL/ t_PLH propagation delay
15 27
34
nA, nB nC, nD to nY
41 ns 4.5 Fig.6
t_THL/ t_TLH output transition time
7 15
19
22 ns 4.5 Fig.6
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.6 Waveforms showing the 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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