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74AHC_AHCT157 Datenblatt(PDF) 8 Page - NXP Semiconductors

Teilenummer 74AHC_AHCT157
Bauteilbeschribung  Quad 2-input multiplexer
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Hersteller  PHILIPS [NXP Semiconductors]
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74AHC_AHCT157 Datenblatt(HTML) 8 Page - NXP Semiconductors

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74AHC_AHCT157_2
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 02 — 9 November 2007
8 of 16
NXP Semiconductors
74AHC157; 74AHCT157
Quad 2-input multiplexer
[1]
Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V).
[2]
tpd is the same as tPLH and tPHL.
[3]
CPD is used to determine the dynamic power dissipation PD (µW).
PD =CPD × VCC2 × fi + ∑ (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.
CPD
power
dissipation
capacitance
CL = 50 pF; fi = 1 MHz;
VI = GND to VCC
[3]
4 outputs switching via S
-
31
-
-
-
-
-
pF
1 outputs switching via I
-
13
-
-
-
-
-
pF
For type 74AHCT157
tpd
propagation
delay
nI0, nI1 to nY; see Figure 7 [2]
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
3.2
6.4
1.0
7.5
1.0
8.0
ns
CL = 50 pF
-
4.6
8.7
1.0
9.8
1.0
11.0
ns
S to nY; see Figure 7
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
3.7
8.6
1.0
10.0
1.0
11.0
ns
CL = 50 pF
-
5.2
10.4
1.0
12.0
1.0
13.0
ns
E to nY; see Figure 8
[2]
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
4.7
8.1
1.0
9.5
1.0
10.5
ns
CL = 50 pF
-
6.7
10.6
1.0
12.0
1.0
13.5
ns
CPD
power
dissipation
capacitance
CL = 50 pF; fi = 1 MHz;
VI = GND to VCC
[3]
4 outputs switching via S
-
41
-
-
-
-
-
pF
1 outputs switching via I
-
16
-
-
-
-
-
pF
Table 7.
Dynamic characteristics …continued
GND = 0 V; For test circuit see Figure 9.
Symbol Parameter
Conditions
25
°C
−40 °C to +85 °C
−40 °C to +125
°C
Unit
Min
Typ[1] Max
Min
Max
Min
Max


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