Datasheet
SN74CBT3253
DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
SCDS018O − MAY 1995 − REVISED JANUARY 2004
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions (see Note 4)
MIN MAX UNIT
V
CC
Supply voltage 4 5.5 V
V
IH
High-level control input voltage 2 V
V
IL
Low-level control input voltage 0.8 V
T
A
Operating free-air temperature −40 85 °C
NOTE 4: All unused control inputs of the device must be held at V
CC
or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP
†
MAX UNIT
V
IK
V
CC
= 4.5 V, I
I
= −18 mA −1.2 V
I
I
V
CC
= 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 3.5 pF
C
A port
V 3Vor0
OE V
10
pF
C
io(OFF)
B port
V
O
= 3 V or 0,
OE = V
CC
4
pF
V 0
I
I
= 64 mA 5 7
r
on
§
V
CC
= 4.5 V
V
I
= 0
I
I
= 30 mA 5 7
Ω
r
on
V
CC
4.5
V
V
I
= 2.4 V, I
I
= 15 mA 10 15
Ω
†
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
pd
S A or B 6.6 1.6 6.2 ns
t
S
AorB
7.1 1.3 6.3
ns
t
en
OE
A or B
7.3 1.4 6.4
ns
t
S
AorB
7.9 1.1 7.4
ns
t
dis
OE
A or B
7.3 2.3 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).