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74AHC_AHCT245 Datenblatt(PDF) 7 Page - NXP Semiconductors

Teilenummer 74AHC_AHCT245
Bauteilbeschribung  Octal bus transceiver; 3-state
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Hersteller  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74AHC_AHCT245 Datenblatt(HTML) 7 Page - NXP Semiconductors

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74AHC_AHCT245_5
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 28 April 2009
7 of 16
NXP Semiconductors
74AHC245; 74AHCT245
Octal bus transceiver; 3-state
10. Dynamic characteristics
Table 7.
Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 7.
Symbol Parameter
Conditions
25
°C
−40 °C to +85 °C −40 °C to +125 °C Unit
Min
Typ[1] Max
Min
Max
Min
Max
74AHC245
tpd
propagation
delay
An to Bn; Bn to An;
see Figure 5
[2]
VCC = 3.0 V to 3.6 V
CL = 15 pF
-
5.0
8.4
1.0
10.0
1.0
10.5
ns
CL = 50 pF
-
6.5
11.9
1.0
13.5
1.0
15.0
ns
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
3.5
5.5
1.0
6.5
1.0
7.0
ns
CL = 50 pF
5.0
7.5
1.0
8.5
1.0
9.5
ns
ten
enable time
OE to An; OE to Bn;
signal name DIR;
see Figure 6
[3]
VCC = 3.0 V to 3.6 V
CL = 15 pF
-
6.5
13.2
1.0
15.5
1.0
16.5
ns
CL = 50 pF
-
9.0
16.7
1.0
19.0
1.0
21.0
ns
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
4.0
8.5
1.0
10.0
1.0
11.0
ns
CL = 50 pF
-
5.0
10.6
1.0
12.0
1.0
13.5
ns
tdis
disable time
OE to An; OE to Bn;
signal name DIR;
see Figure 6
[4]
VCC = 3.0 V to 3.6 V
CL = 15 pF
-
7.5
12.5
1.0
15.5
1.0
16.0
ns
CL = 50 pF
-
10.0
15.8
1.0
18.0
1.0
20.0
ns
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
4.5
7.8
1.0
9.2
1.0
10.0
ns
CL = 50 pF
-
6.0
9.7
1.0
11.0
1.0
12.5
ns
CPD
power
dissipation
capacitance
fi = 1 MHz;
VI = GND to VCC
[5]
-12
-
-
-
-
-
pF
74AHCT245; VCC = 4.5 V to 5.5 V
tpd
propagation
delay
An to Bn; Bn to An;
see Figure 5
[2]
CL = 15 pF
-
3.5
7.7
1.0
8.5
1.0
10.0
ns
CL = 50 pF
-
4.5
8.7
1.0
9.5
1.0
11.0
ns
ten
enable time
OE to An; OE to Bn;
signal name DIR;
see Figure 6
[3]
CL = 15 pF
-
5.0
13.8
1.0
15.0
1.0
17.5
ns
CL = 50 pF
-
6.0
14.8
1.0
16.0
1.0
18.5
ns


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