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SN74CB3Q3257_08 Datasheet, PDF (5/18 Pages) Texas Instruments – 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER 2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
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SN74CB3Q3257
4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER
2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
SCDS135A – SEPTEMBER 2003 – REVISED MARCH 2005
Electrical Characteristics(1)
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP(2) MAX UNIT
VIK
IIN
IOZ (3)
Ioff
ICC
∆ICC (4)
ICCD (5)
VCC = 3.6 V,
Control inputs VCC = 3.6 V,
VCC = 3.6 V,
VCC = 0,
VCC = 3.6 V,
II = –18 mA
VIN = 0 to 5.5 V
VO = 0 to 5.5 V,
VI = 0,
VO = 0 to 5.5 V,
II/O = 0,
Switch ON or OFF,
Control inputs VCC = 3.6 V,
One input at 3 V,
Per control
input
VCC = 3.6 V, A and B ports open,
Control input switching at 50% duty cycle
Switch OFF,
VIN = VCC or GND
VI = 0
VIN = VCC or GND
Other inputs at VCC or GND
–1.8 V
±1 µA
±1 µA
1 µA
0.7 1.5 mA
30
0.3 0.35
µA
mA/
MHz
Cin
Cio(OFF)
Cio(ON)
Control inputs VCC = 3.3 V,
A port
VCC = 3.3 V,
B port
A port
B port
VCC = 3.3 V,
VCC = 3.3 V,
VIN = 5.5 V, 3.3 V, or 0
Switch OFF,
VIN = VCC or GND,
VI/O = 5.5 V, 3.3 V, or 0
Switch OFF,
VIN = VCC or GND,
VI/O = 5.5 V, 3.3 V, or 0
Switch ON,
VIN = VCC or GND,
VI/O = 5.5 V, 3.3 V, or 0
2.5 3.5 pF
5.5
7 pF
3.5
5 pF
10.5 13
pF
10.5 13
ron (6)
VCC = 2.3 V,
TYP at VCC = 2.5 V
VCC = 3 V
VI = 0,
VI = 1.7 V,
VI = 0,
VI = 2.4 V,
IO = 30 mA
IO = –15 mA
IO = 30 mA
IO = –15 mA
4
8
4
9
Ω
4
6
4
8
(1) VIN and IIN refer to control inputs. VI, VO, II, and IO refer to data pins.
(2) All typical values are at VCC = 3.3 V (unless otherwise noted), TA = 25°C.
(3) For I/O ports, the parameter IOZ includes the input leakage current.
(4) This is the increase in supply current for each input that is at the specified TTL voltage level, rather than VCC or GND.
(5) This parameter specifies the dynamic power-supply current associated with the operating frequency of a single control input (see
Figure 2).
(6) Measured by the voltage drop between the A and B terminals at the indicated current through the switch. ON-state resistance is
determined by the lower of the voltages of the two (A or B) terminals.
Switching Characteristics
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3)
PARAMETER
fOE or fS (1)
tpd (2)
tpd(s)
ten
tdis
FROM
(INPUT)
OE or S
A or B
S
S
OE
S
OE
TO
(OUTPUT)
A or B
B or A
A
B
A or B
B
A or B
VCC = 2.5 V
± 0.2 V
MIN MAX
10
0.12
1.5 6.5
1.5 6.5
1.5 6.5
1
6
1
6
VCC = 3.3 V
± 0.3 V
MIN MAX
20
0.2
1.5 5.5
1.5 5.5
1.5 5.5
1
6
1
6
UNIT
MHz
ns
ns
ns
ns
(1) Maximum switching frequency for control inputs (VO > VCC, VI = 5 V, RL ≥ 1 MΩ, CL = 0).
(2) 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).
5