74HC244_05 Datasheet, PDF (10/22 Pages) NXP Semiconductors – Octal buffer/line driver; 3-state

Philips Semiconductors
74HC244; 74HCT244
Octal buffer/line driver; 3-state
11. Dynamic characteristics
Table 9: Dynamic characteristics 74HC244
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF unless otherwise specified; for test circuit see Figure 8.
Symbol Parameter
Conditions
Min
Typ
T_amb = 25 °C
t_PHL,
t_PLH
propagation delay nAn to nYn see Figure 6
V_CC = 2.0 V
-
30
V_CC = 4.5 V
V_CC = 5 V; C_L = 15 pF
-
11
-
9
t_PZH,
t_PZL
3-state output enable time
nOE to nYn
V_CC = 6.0 V
see Figure 7
V_CC = 2.0 V
-
9
-
36
V_CC = 4.5 V
-
13
V_CC = 6.0 V
-
10
t_PHZ,
t_PLZ
3-state output disable time
nOE to nYn
see Figure 7
V_CC = 2.0 V
-
39
V_CC = 4.5 V
V_CC = 6.0 V
-
14
-
11
t_THL,
t_TLH
output transition time
see Figure 6
V_CC = 2.0 V
-
14
V_CC = 4.5 V
-
5
C_PD
power dissipation
capacitance
V_CC = 6.0 V
V_I = GND to V_CC
-
4
[1] _-
35
T_amb = −40 °C to +85 °C
t_PHL,
t_PLH
propagation delay nAn to nYn see Figure 6
V_CC = 2.0 V
-
-
V_CC = 4.5 V
-
-
V_CC = 6.0 V
-
-
t_PZH,
t_PZL
3-state output enable time
nOE to nYn
see Figure 7
V_CC = 2.0 V
-
-
V_CC = 4.5 V
-
-
V_CC = 6.0 V
-
-
t_PHZ,
t_PLZ
3-state output disable time
nOE to nYn
see Figure 7
V_CC = 2.0 V
-
-
V_CC = 4.5 V
-
-
V_CC = 6.0 V
-
-
t_THL,
t_TLH
output transition time
see Figure 6
V_CC = 2.0 V
V_CC = 4.5 V
-
-
-
-
V_CC = 6.0 V
-
-
Max
Unit
110
ns
22
ns
-
ns
19
ns
150
ns
30
ns
26
ns
150
ns
30
ns
26
ns
60
ns
12
ns
10
ns
-
pF
145
ns
28
ns
24
ns
190
ns
38
ns
33
ns
190
ns
38
ns
33
ns
75
ns
15
ns
13
ns
74HC_HCT244_3
Product data sheet
Rev. 03 — 22 December 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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