74CB3Q3245DBQRG4 datasheet(5/21 Pages) TI

Part #	74CB3Q3245DBQRG4

Description	8-BIT FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH

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Manufacturer	TI [Texas Instruments]

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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

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

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

µA

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)

Ω

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(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 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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