74HC245; 74HCT245
Philips Semiconductors
Octal bus tranceiver; 3-state
Table 9:
Dynamic characteristics type 74HC245 …continued
GND = 0 V; test circuit see Figure 7.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
tPZH, tPZL
3-state output enable time OE to see Figure 6
An or OE to Bn
VCC = 2.0 V
-
-
-
-
-
-
190
38
ns
ns
ns
VCC = 4.5 V
VCC = 6.0 V
33
tPHZ, tPLZ
3-state output disable time OE to see Figure 6
An or OE to Bn
VCC = 2.0 V
-
-
-
-
-
-
190
38
ns
ns
ns
VCC = 4.5 V
VCC = 6.0 V
33
tTHL, tTLH
output transition time
see Figure 5
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
-
-
-
-
-
-
75
15
13
ns
ns
ns
Tamb = −40 °C to +125 °C
tPHL, tPLH
tPZH, tPZL
tPHZ, tPLZ
tTHL, tTLH
propagation delay An to Bn or Bn see Figure 5
to An
VCC = 2.0 V
-
-
-
-
-
-
135
27
ns
ns
ns
VCC = 4.5 V
VCC = 6.0 V
23
3-state output enable time OE to see Figure 6
An or OE to Bn
VCC = 2.0 V
-
-
-
-
-
-
225
45
ns
ns
ns
VCC = 4.5 V
VCC = 6.0 V
38
3-state output disable time OE to see Figure 6
An or OE to Bn
VCC = 2.0 V
-
-
-
-
-
-
225
45
ns
ns
ns
VCC = 4.5 V
VCC = 6.0 V
38
output transition time
see Figure 5
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
-
-
-
-
-
-
90
18
15
ns
ns
ns
[1] CPD is used to determine the dynamic power dissipation (PD in µW):
PD = CPD × VCC2 × fi × N + ∑ (CL × VCC2 × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
∑ (CL × VCC2 × fo) = sum of outputs.
9397 750 14502
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 31 January 2005
11 of 22
NXP [ NXP ]
