SN74CB3Q3245_10 Datasheet, PDF (5/21 Pages) Texas Instruments – 8-BIT FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH

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SN74CB3Q3245
8-BIT FET BUS SWITCH
2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
SCDS124B – JULY 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
V_IK
I_IN
I_OZ ⁽³⁾
I_off
I_CC
∆I_CC ⁽⁴⁾
I_CCD ⁽⁵⁾
Control inputs
Control inputs
Per control
input
V_CC = 3.6 V,
V_CC = 3.6 V,
V_CC = 3.6 V,
V_CC = 0,
V_CC = 3.6 V,
I_I = –18 mA
V_IN = 0 to 5.5 V
V_O = 0 to 5.5 V,
V_I = 0,
V_O = 0 to 5.5 V,
I_I/O = 0,
Switch ON or OFF,
V_CC = 3.6 V,
One input at 3 V,
V_CC = 3.6 V,
A and B ports open,
Control input switching at 50% duty cycle
Switch OFF,
V_IN = V_CC or GND
V_I = 0
V_IN = V_CC or GND
Other inputs at V_CC or GND
–1.8 V
±1 µA
±1 µA
1 µA
1
2 mA
30
0.30 0.35
µA
mA/
MHz
C_in
Control inputs
C_io(OFF)
V_CC = 3.3 V,
V_CC = 3.3 V,
C_io(ON)
r_on ⁽⁶⁾
V_CC = 3.3 V,
V_CC = 2.3 V,
TYP at V_CC = 2.5 V
V_CC = 3 V
V_IN = 5.5 V, 3.3 V, or 0
Switch OFF,
V_IN = V_CC or GND,
V_I/O = 5.5 V, 3.3 V, or 0
Switch ON,
V_IN = V_CC or GND,
V_I/O = 5.5 V, 3.3 V, or 0
V_I = 0,
I_O = 30 mA
V_I = 1.7 V,
I_O = –15 mA
V_I = 0,
I_O = 30 mA
V_I = 2.4 V,
I_O = –15 mA
2.5 3.5 pF
3.5
5 pF
9 11 pF
4
8
4.5
9
Ω
4
6
4
8
(1) V_IN and I_IN refer to control inputs. V_I, V_O, I_I, and I_O refer to data pins.
(2) All typical values are at V_CC = 3.3 V (unless otherwise noted), T_A = 25°C.
(3) For I/O ports, the parameter I_OZ 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 V_CC 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
f_OE ⁽¹⁾
t_pd ⁽²⁾
t_en
t_dis
FROM
(INPUT)
OE
A or B
OE
OE
TO
(OUTPUT)
A or B
B or A
A or B
A or B
V_CC = 2.5 V
± 0.2 V
MIN MAX
10
0.12
1.5 7.5
1 6.5
V_CC = 3.3 V
± 0.3 V
MIN MAX
20
0.20
1.5 6.5
1 6.5
UNIT
MHz
ns
ns
ns
(1) Maximum switching frequency for control input (V_O > V_CC, V_I = 5 V, R_L ≥ 1 MΩ, C_L = 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).
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