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SN74CB3T3257PW Fiches technique(PDF) 5 Page - Texas Instruments |
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SN74CB3T3257PW Fiches technique(HTML) 5 Page - Texas Instruments |
5 / 16 page www.ti.com Electrical Characteristics (1) Switching Characteristics SN74CB3T3257 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER 2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER SCDS149 – OCTOBER 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 V, II = –18 mA –1.2 V VOH See Figures 3 and 4 IIN Control inputs VCC = 3.6 V, VIN = 3.6 V to 5.5 V or GND ±10 µA VI = VCC – 0.7 V to 5.5 V ±20 VCC = 3.6 V, II Switch ON, VI = 0.7 V to VCC – 0.7 V –40 µA VIN = VCC or GND VI = 0 to 0.7 V ±5 IOZ(3) VCC = 3.6 V, VO = 0 to 5.5 V, VI = 0, Switch OFF, VIN = VCC or GND ±10 µA Ioff VCC = 0, VO = 0 to 5.5 V, VI = 0 10 µA VI = VCC or GND 20 VCC = 3.6 V, II/O = 0, ICC µA Switch ON or OFF, VIN = VCC or GND VI = 5.5 V 20 ∆I CC (4) Control inputs VCC = 3 V to 3.6 V, One input at VCC – 0.6 V, Other inputs at VCC or GND 300 µA Cin Control inputs VCC = 3.3 V, VIN = VCC or GND 3 pF A port 7 Cio(OFF) VCC = 3.3 V, VI/O = 5.5 V, 3.3 V, or GND, Switch OFF, VIN = VCC or GND pF B port 5 VI/O = 5.5 V or 3.3 V 6 A port VCC = 3.3 V, VI/O = GND 16 Cio(ON) Switch ON, pF VI/O = 5.5 V or 3.3 V 4 VIN = VCC or GND B port VI/O = GND 16 IO = 24 mA 5 8 VCC = 2.3 V, TYP at VCC = 2.5 V, VI = 0 IO = 16 mA 5 8 ron(5) Ω IO = 64 mA 5 7 VCC = 3 V, VI = 0 IO = 32 mA 5 7 (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) Measured by the voltage drop between 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 2) VCC = 2.5 V VCC = 3.3 V FROM TO ± 0.2 V ± 0.3 V PARAMETER UNIT (INPUT) (OUTPUT) MIN MAX MIN MAX tpd(1) A or B B or A 0.15 0.25 ns tpd(s) S A 1 9.5 1 7 ns S B 1 9 1 7.5 ten ns OE A or B 1 9 1 7.5 S B 1 7 1 7.5 tdis ns OE A or B 1 6 1 8 (1) 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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