參數(shù)資料
型號(hào)： SN74CB3Q3245PWG4
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 總線收發(fā)器
英文描述： CB3Q/3VH/3C/2B SERIES, 8-BIT DRIVER, TRUE OUTPUT, PDSO20
封裝： GREEN, PLASTIC, TSSOP-20
文件頁(yè)數(shù)： 17/21頁(yè)
文件大小： 788K
代理商： SN74CB3Q3245PWG4
www.ti.com
Electrical Characteristics
(1)
Switching Characteristics
SN74CB3Q3245
8-BIT FET BUS SWITCH
2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
SCDS124B – JULY 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
A
VO = 0 to 5.5 V,
Switch OFF,
IOZ(3)
VCC = 3.6 V,
±1
A
VI = 0,
VIN = VCC or GND
Ioff
VCC = 0,
VO = 0 to 5.5 V,
VI = 0
1
A
II/O = 0,
ICC
VCC = 3.6 V,
VIN = VCC or GND
1
2
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
A
VCC = 3.6 V,
A and B ports open,
Per control
mA/
ICCD(5)
0.30
0.35
input
MHz
Control input switching at 50% duty cycle
Cin
Control inputs
VCC = 3.3 V,
VIN = 5.5 V, 3.3 V, or 0
2.5
3.5
pF
Switch OFF,
Cio(OFF)
VCC = 3.3 V,
VI/O = 5.5 V, 3.3 V, or 0
3.5
5
pF
VIN = VCC or GND,
Switch ON,
Cio(ON)
VCC = 3.3 V,
VI/O = 5.5 V, 3.3 V, or 0
9
11
pF
VIN = VCC or GND,
VI = 0,
IO = 30 mA
4
8
VCC = 2.3 V,
TYP at VCC = 2.5 V
VI = 1.7 V,
IO = –15 mA
4.5
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
(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(1)
OE
A or B
10
20
MHz
tpd(2)
A or B
B or A
0.12
0.20
ns
ten
OE
A or B
1.5
7.5
1.5
6.5
ns
tdis
OE
A or B
1
6.5
1
6.5
ns
(1)
Maximum switching frequency for control input (VO > VCC, VI = 5 V, RL ≥ 1 M, 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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