Datasheet

SN74CBT3125
QUADRUPLE FET BUS SWITCH
SCDS021I − MAY 1995 − REVISED SEPTEMBER 2002
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP
†
MAX UNIT
V
IK
V
CC
= 4 V, I
I
= −18 mA −1.2 V
I
I
V
CC
= 5.5 V, V
I
= 5.5 V or GND ±1 μA
I
CC
V
CC
= 5.5 V, I
O
= 0, V
I
= V
CC
or GND 3 μA
ΔI
CC
‡
Control inputs V
CC
= 5.5 V, One input at 3.4 V, Other inputs at V
CC
or GND 2.5 mA
C
i
Control inputs V
I
= 3 V or 0 3 pF
C
io(OFF)
V
O
= 3 V or 0, OE = V
CC
4 pF
V
CC
= 4 V,
TYP at V
CC
= 4 V
V
I
= 2.4 V, I
I
= 15 mA 16 22
r
on
§
V 0
I
I
= 64 mA 5 7
Ω
r
on
§
V
CC
= 4.5 V
V
I
= 0
I
I
= 30 mA 5 7
Ω
V
CC
4.5
V
V
I
= 2.4 V, I
I
= 15 mA 10 15
†
All typical values are at V
CC
= 5 V (unless otherwise noted), T
A
= 25°C.
‡
This is the increase in supply current for each input that is at the specified TTL voltage level rather than V
CC
or GND.
§
Measured by the voltage drop between the A and the B terminals at the indicated current through the switch. On-state resistance is determined
by the lower voltage of the two (A or B) terminals.
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 4 V
V
CC
= 5 V
± 0.5 V
UNIT
PARAMETER
(INPUT) (OUTPUT)
MIN MAX MIN MAX
UNIT
t
pd
¶
A or B B or A 0.35 0.25 ns
t
en
OE
A or B 6 1.6 5.4 ns
t
dis
OE
A or B 5.1 1 4.7 ns
¶
The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specified load capacitance,
when driven by an ideal voltage source (zero output impedance).