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SN74CB3Q3257RGYR Scheda tecnica(PDF) 5 Page - Texas Instruments

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Il numero della parte SN74CB3Q3257RGYR
Spiegazioni elettronici  4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER 2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN74CB3Q3257RGYR Scheda tecnica(HTML) 5 Page - Texas Instruments

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Electrical Characteristics
(1)
Switching Characteristics
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
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP(2)
MAX
UNIT
VIK
VCC = 3.6 V,
II = –18 mA
–1.8
V
IIN
Control inputs VCC = 3.6 V,
VIN = 0 to 5.5 V
±1
µA
VO = 0 to 5.5 V,
Switch OFF,
IOZ(3)
VCC = 3.6 V,
±1
µA
VI = 0,
VIN = VCC or GND
Ioff
VCC = 0,
VO = 0 to 5.5 V,
VI = 0
1
µA
II/O = 0,
ICC
VCC = 3.6 V,
VIN = VCC or GND
0.7
1.5
mA
Switch ON or OFF,
∆I
CC
(4)
Control inputs VCC = 3.6 V,
One input at 3 V,
Other inputs at VCC or GND
30
µA
Per control
VCC = 3.6 V, A and B ports open,
mA/
ICCD(5)
0.3
0.35
input
Control input switching at 50% duty cycle
MHz
Cin
Control inputs VCC = 3.3 V,
VIN = 5.5 V, 3.3 V, or 0
2.5
3.5
pF
Switch OFF,
A port
VCC = 3.3 V,
VI/O = 5.5 V, 3.3 V, or 0
5.5
7
pF
VIN = VCC or GND,
Cio(OFF)
Switch OFF,
B port
VCC = 3.3 V,
VI/O = 5.5 V, 3.3 V, or 0
3.5
5
pF
VIN = VCC or GND,
A port
10.5
13
Switch ON,
Cio(ON)
VCC = 3.3 V,
VI/O = 5.5 V, 3.3 V, or 0
pF
VIN = VCC or GND,
B port
10.5
13
VI = 0,
IO = 30 mA
4
8
VCC = 2.3 V,
TYP at VCC = 2.5 V
VI = 1.7 V,
IO = –15 mA
4
9
ron(6)
VI = 0,
IO = 30 mA
4
6
VCC = 3 V
VI = 2.4 V,
IO = –15 mA
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.
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3)
VCC = 2.5 V
VCC = 3.3 V
FROM
TO
± 0.2 V
± 0.3 V
PARAMETER
UNIT
(INPUT)
(OUTPUT)
MIN
MAX
MIN
MAX
fOE or fS(1)
OE or S
A or B
10
20
MHz
tpd(2)
A or B
B or A
0.12
0.2
ns
tpd(s)
S
A
1.5
6.5
1.5
5.5
ns
S
B
1.5
6.5
1.5
5.5
ten
ns
OE
A or B
1.5
6.5
1.5
5.5
S
B
1
6
1
6
tdis
ns
OE
A or B
1
6
1
6
(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


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