74LV245D,112 데이터 시트보기 (PDF) - NXP Semiconductors.
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74LV245D,112 Datasheet PDF : 15 Pages
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NXP Semiconductors
74LV245
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
−40 °C to +85 °C
Min Typ[1] Max
tpd
propagation delay An, Bn to Bn, An; see Figure 5 [2]
VCC = 1.2 V
-
45
28
VCC = 2.0 V
-
15
28
ten
enable time
VCC = 2.7 V
-
VCC = 3.0 V to 3.6 V; CL = 15 pF [3] -
VCC = 3.0 V to 3.6 V
[3]
-
VCC = 4.5 V to 5.5 V
[3]
-
OE to An, Bn; see Figure 6
[2]
11
19
7
-
9
16
8
11
VCC = 1.2 V
-
55
-
VCC = 2.0 V
-
19
31
tdis
disable time
VCC = 2.7 V
VCC = 3.0 V to 3.6 V
VCC = 4.5 V to 5.5 V
OE to An, Bn; see Figure 6
-
[3]
-
[3]
-
[2]
14
23
10
18
8.5 14
VCC = 1.2 V
-
65
-
VCC = 2.0 V
-
24
32
VCC = 2.7 V
-
VCC = 3.0 V to 3.6 V
[3]
-
VCC = 4.5 V to 5.5 V
[3]
-
CPD
power dissipation CL = 50 pF; fi = 1 MHz;
[4]
-
capacitance
VI = GND to VCC; VCC = 3.3 V
18
24
14
20
11.5 16
40
-
[1] All typical values are measured at Tamb = 25 °C.
[2] tpd is the same as tPLH and tPHL.
ten is the same as tPZL and tPZH.
tdis is the same as tPLZ and tPHZ.
[3] Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V).
[4] CPD is used to determine the dynamic power dissipation (PD in µW).
PD = CPD × VCC2 × fi × N + Σ(CL × VCC2 × fo) where:
fi = input frequency in MHz, fo = output frequency in MHz
CL = output load capacitance in pF
VCC = supply voltage in Volts
N = number of inputs switching
Σ(CL × VCC2 × fo) = sum of the outputs.
−40 °C to +125 °C Unit
Min
Max
-
-
ns
-
34
ns
-
24
ns
-
-
ns
-
20
ns
-
14
ns
-
-
ns
-
39
ns
-
29
ns
-
23
ns
-
18
ns
-
-
ns
-
39
ns
-
29
ns
-
24
ns
-
19
ns
-
-
pF
74LV245_3
Product data sheet
Rev. 03 — 15 April 2009
© NXP B.V. 2009. All rights reserved.
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