SN74CB3T3257PWR datasheet(5/12 Pages) TI

Numer części	SN74CB3T3257PWR

Szczegółowy opis	4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER 2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER

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Producent	TI [Texas Instruments]

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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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