74HC688 Datasheet, PDF (6/7 Pages) NXP Semiconductors – 8-bit magnitude comparator

Philips Semiconductors
8-bit magnitude comparator
Product specification
74HC/HCT688
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
P_n
Q_n
E
UNIT LOAD COEFFICIENT
0.35
0.35
0.70
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
t_PHL/ t_PLH
propagation delay
P_n, Q_n to P = Q
propagation delay
E to P = Q
20 34
43
51 ns 4.5 Fig.6
18 24
30
36 ns 4.5 Fig.7
t_THL/ t_TLH output transition time
7 15
19
22 ns 4.5 Figs 6 and 7
December 1990
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