74HC244 Datasheet, PDF (5/7 Pages) NXP Semiconductors – Octal buffer/line driver; 3-state

Philips Semiconductors
Octal buffer/line driver; 3-state
Product specification
74HC/HCT244
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
I_CC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
TEST CONDITIONS
SYMBOL
PARAMETER
74HC
+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
1A_n to 1Y_n;
2A_n to 2Y_n
30 110
145
165 ns 2.0 Fig.5
11 22
28
33
4.5
9 19
24
28
6.0
t_PZH/ t_PZL 3-state output enable time
36 150
190
225 ns 2.0 Fig.6
1OE to 1Y_n;
13 30
38
45
4.5
2OE to 2Y_n
10 26
33
38
6.0
t_PHZ/ t_PLZ 3-state output disable time
39 150
190
225 ns 2.0 Fig.6
1OE to 1Y_n;
14 30
38
45
4.5
2OE to 2Y_n
11 26
33
38
6.0
t_THL/ t_TLH output transition time
14 60
75
90 ns 2.0 Fig.5
5 12
15
18
4.5
4 10
13
15
6.0
December 1990
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