Datasheet

September 1993 5
Philips Semiconductors Product specification
Quad 2-input NAND Schmitt trigger 74HC/HCT132
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications” . Transfer characteristics are
given below.
Output capability: standard
I
CC
category: SSI
Notes 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.
Transfer characteristics for 74HCT
Voltages are referenced to GND (ground = 0 V)
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
=t
f
= 6 ns; C
L
= 50 pF
INPUT UNIT LOAD COEFFICIENT
nA, nB 0.3
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HCT
V
CC
(V)
WAVEFORMS
+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
V
T+
positive-going threshold 1.2 1.41 1.9 1.2 1.9 1.2 1.9 V 4.5 Figs 6 and 7
1.4 1.59 2.1 1.4 2.1 1.4 2.1 5.5
V
T−
negative-going threshold 0.5 0.85 1.2 0.5 1.2 0.5 1.2 V 4.5 Figs 6 and 7
0.6 0.99 1.4 0.6 1.4 0.6 1.4 5.5
V
H
hysteresis (V
T+
− V
T−
) 0.4 0.56 − 0.4 − 0.4 − V 4.5 Figs 6 and 7
0.4 0.60 − 0.4 − 0.4 − 5.5
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HCT
V
CC
(V)
WAVEFORMS
+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
t
PHL
/ t
PLH
propagation delay
nA, nB to nY
20 33 41 50 ns 4.5 Fig.13
t
THL
/ t
TLH
output transition time 7 15 19 22 ns 4.5 Fig.13