74HC245 Datasheet, PDF (11/22 Pages) NXP Semiconductors – Octal bus transceiver; 3-state

Philips Semiconductors
Table 9: Dynamic characteristics type 74HC245 …continued
GND = 0 V; test circuit see Figure 7.
Symbol Parameter
Conditions
t_PZH, t_PZL 3-state output enable time OE to
An or OE to Bn
t_PHZ, t_PLZ 3-state output disable time OE to
An or OE to Bn
t_THL, t_TLH output transition time
T_amb = −40 °C to +125 °C
t_PHL, t_PLH propagation delay An to Bn or Bn
to An
t_PZH, t_PZL 3-state output enable time OE to
An or OE to Bn
t_PHZ, t_PLZ 3-state output disable time OE to
An or OE to Bn
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
see Figure 6
V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
see Figure 5
V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
see Figure 5
V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
see Figure 6
V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
see Figure 6
V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
see Figure 5
V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
[1] C_PD is used to determine the dynamic power dissipation (P_D in µW):
P_D = C_PD × V_CC2 × f_i × N + ∑ (C_L × V_CC2 × f_o) where:
f_i = input frequency in MHz;
f_o = output frequency in MHz;
C_L = output load capacitance in pF;
V_CC = supply voltage in V;
N = number of inputs switching;
∑ (C_L × V_CC2 × f_o) = sum of outputs.
74HC245; 74HCT245
Octal bus tranceiver; 3-state
Min
Typ
Max Unit
-
-
190
ns
-
-
38
ns
-
-
33
ns
-
-
190
ns
-
-
38
ns
-
-
33
ns
-
-
75
ns
-
-
15
ns
-
-
13
ns
-
-
135
ns
-
-
27
ns
-
-
23
ns
-
-
225
ns
-
-
45
ns
-
-
38
ns
-
-
225
ns
-
-
45
ns
-
-
38
ns
-
-
90
ns
-
-
18
ns
-
-
15
ns
9397 750 14502
Product data sheet
Rev. 03 — 31 January 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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