Datasheet

74AHC_AHCT1G66_4 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 04 — 18 December 2008 6 of 17
NXP Semiconductors
74AHC1G66; 74AHCT1G66
Single-pole single-throw analog switch
10.2 ON resistance
[1] At supply voltages approaching 2 V, the analog switch ON resistance becomes extremely non-linear. Therefore it is recommended that
these devices be used to transmit digital signals only, when using this supply voltage.
10.3 ON resistance test circuit and graphs
Table 8. ON resistance
At recommended operating conditions; voltages are referenced to GND (ground 0 V); for graph see Figure 7
[1]
.
Symbol Parameter Conditions 25 °C −40 °C to +85 °C −40 °C to +125 °C Unit
Typ max Max Max
74AHC1G66 and 74AHCT1G66
R
ON(peak)
ON resistance
(peak)
V
I
=V
CC
to GND; see Figure 6
I
SW
= 1.0 mA; V
CC
= 2.0 V 148
[1]
-- -Ω
I
SW
= 10 mA; V
CC
= 3.0 V to 3.6 V 28 50 70 110 Ω
I
SW
= 10 mA; V
CC
= 4.5 V to 5.5 V 15 30 40 60 Ω
R
ON(rail)
ON resistance
(rail)
V
I
= GND; see Figure 6
I
SW
= 1.0 mA; V
CC
= 2.0 V 30 - - - Ω
I
SW
= 10 mA; V
CC
= 3.0 V to 3.6 V 20 50 65 90 Ω
I
SW
= 10 mA; V
CC
= 4.5 V to 5.5 V 15 22 26 40 Ω
V
I
=V
CC
; see Figure 6
I
SW
= 1.0 mA; V
CC
= 2.0 V 28 - - - Ω
I
SW
= 10 mA; V
CC
= 3.0 V to 3.6 V 18 50 65 90 Ω
I
SW
= 10 mA; V
CC
= 4.5 V to 5.5 V 13 22 26 40 Ω
R
ON
=V
SW
/ I
SW
.T
amb
=25°C.
Fig 6. Test circuit for measuring ON resistance Fig 7. Typical ON resistance as a function of
input voltage
001aag490
V
I
V
IH
V
CC
GND
ZY
E
V
SW
I
SW
0246
V
I
(V)
R
ON
(Ω)
40
30
10
0
20
mna630
V
CC
= 3.0 V
4.5 V
5.5 V