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| 74HC7540D Datasheet, PDF (6/16 Pages) NXP Semiconductors – Octal Schmitt trigger buffer/line driver; 3-state; inverting Rev. 4 — 31 December 2012 | |||
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NXP Semiconductors
74HC7540; 74HCT7540
Octal Schmitt trigger buffer/line driver; 3-state; inverting
Table 7. Dynamic characteristics
GND = 0 V; CL = 50 pF; for test circuit see Figure 7.
Symbol Parameter
Conditions
tt
transition time
CPD
power dissipation
capacitance
74HCT7540
see Figure 5
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
per package;
VI = GND to VCC
tpd
propagation delay An to Yn; see Figure 5
VCC = 4.5 V
VCC = 5.0 V; CL = 15 pF
ten
enable time
OEn to Yn; see Figure 6
VCC = 4.5 V
tdis
disable time
OEn to Yn; see Figure 6
VCC = 4.5 V
tt
transition time
VCC = 4.5 V; see Figure 5
CPD
power dissipation per package;
capacitance
VI = GND to VCC ï 1.5 V
Tamb = 25 ï°C
Min Typ Max
[2]
Tamb = ï40 ï°C to +125 ï°C Unit
Max (85 ï°C) Max (125 ï°C)
- 14 60
75
-
5 12
15
-
4 10
13
[3] -
29
-
-
90
ns
18
ns
15
ns
-
pF
[1]
- 19 32
40
- 16 -
-
[1]
- 19 32
40
[1]
- 20 32
40
[2] -
5 12
15
[3] -
31
-
-
48
ns
-
ns
48
ns
48
ns
18
ns
-
pF
[1] tpd is the same as tPLH and tPHL.
ten is the same as tPZL and tPZH.
tdis is the same as tPLZ and tPHZ.
[2] tt is the same as tTHL and tTLH.
[3] CPD is used to determine the dynamic power dissipation (PD in ïW):
PD = CPD ï´ VCC2 ï´ fi ï´ N + ï¥ (CL ï´ VCC2 ï´ 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;
ï¥ (CL ï´ VCC2 ï´ fo) = sum of outputs.
74HC_HCT7540
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 â 31 December 2012
© NXP B.V. 2012. All rights reserved.
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