SN74CB3Q3257

4BIT 1OF2 FET MULTIPLEXER/DEMULTIPLEXER

2.5V/3.3V LOW VOLTAGE, HIGHBANDWIDTH BUS SWITCH

SCDS135A – SEPTEMBER 2003 − REVISED NOVEMBER 2003

5

POST OFFICE BOX 655303

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

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

IOZ‡

VCC = 3.6 V,

VO = 0 to 5.5 V,

VI = 0,

Switch OFF,

VIN = VCC or GND

±1

µA

Ioff

VCC = 0,

VO = 0 to 5.5 V,

VI = 0

1

µA

ICC

VCC = 3.6 V,

II/O = 0,

Switch ON or OFF,

VIN = VCC or GND

0.7

1.5

mA

∆ICC§

Control inputs

VCC = 3.6 V,

One input at 3 V,

Other inputs at VCC or GND

30

µA

ICCD¶

Per control

input

VCC = 3.6 V, A and B ports open,

Control input switching at 50% duty cycle

0.3

0.35

mA/

MHz

Cin

Control inputs

VCC = 3.3 V,

VIN = 5.5 V, 3.3 V, or 0

2.5

3.5

pF

Cio(OFF)

A port

VCC = 3.3 V,

Switch OFF,

VIN = VCC or GND,

VI/O = 5.5 V, 3.3 V, or 0

5.5

7

pF

Cio(OFF)

B port

VCC = 3.3 V,

Switch OFF,

VIN = VCC or GND,

VI/O = 5.5 V, 3.3 V, or 0

3.5

5

pF

Cio(ON)

A port

VCC = 3.3 V,

Switch ON,

VI/O = 5.5 V, 3.3 V, or 0

10.5

13

pF

Cio(ON)

B port

VCC = 3.3 V,

Switch ON,

VIN = VCC or GND,

VI/O = 5.5 V, 3.3 V, or 0

10.5

13

pF

VCC = 2.3 V,

VI = 0,

IO = 30 mA

4

8

ron#

VCC = 2.3 V,

TYP at VCC = 2.5 V

VI = 1.7 V,

IO = −15 mA

4

9

Ω

ron#

VCC = 3 V

VI = 0,

IO = 30 mA

4

6

Ω

VCC = 3 V

VI = 2.4 V,

IO = −15 mA

4

8

VIN and IIN refer to control inputs. VI, VO, II, and IO refer to data pins.

† All typical values are at VCC = 3.3 V (unless otherwise noted), TA = 25°C.

‡ For I/O ports, the parameter IOZ includes the input leakage current.

§ This is the increase in supply current for each input that is at the specified TTL voltage level, rather than VCC or GND.

¶ This parameter specifies the dynamic power-supply current associated with the operating frequency of a single control input (see Figure 2).

# 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

FROM

(INPUT)

TO

(OUTPUT)

VCC = 2.5 V

± 0.2 V

VCC = 3.3 V

± 0.3 V

UNIT

PARAMETER

(INPUT)

(OUTPUT)

MIN

MAX

MIN

MAX

UNIT

fOE or fS||

OE or S

A or B

10

20

MHz

tpdk

A or B

B or A

0.12

0.2

ns

tpd(s)

S

A

1.5

6.5

1.5

5.5

ns

ten

S

B

1.5

6.5

1.5

5.5

ns

ten

OE

A or B

1.5

6.5

1.5

5.5

ns

tdis

S

B

1

6

1

6

ns

tdis

OE

A or B

1

6

1

6

ns

|| Maximum switching frequency for control inputs (VO > VCC, VI = 5 V, RL ≥ 1 MΩ, CL = 0).

k 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).