SN74CBTLV3857

LOW-VOLTAGE 10-BIT FET BUS SWITCH

WITH INTERNAL PULLDOWN RESISTORS

SCDS085B – OCTOBER 1998 – REVISED AUGUST 1999

3

POST OFFICE BOX 655303

recommended operating conditions (see Note 3)

MIN

NOM

MAX

UNIT

VCC

Supply voltage

3

3.3

3.6

V

VREF

Reference voltage (0.38

× VCC)

1.15

1.25

1.35

V

VIH

AC high-level control input voltage

VREF + 350 mV

V

VIL

AC low-level control input voltage

VREF – 350 mV

V

VIH

DC high-level control input voltage

VREF + 180 mV

V

VIL

DC low-level control input voltage

VREF – 180 mV

V

TA

Operating free-air temperature

–40

85

°C

NOTE 3: All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,

Implications of Slow or Floating CMOS Inputs, literature number SCBA004.

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

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIK

VCC = 3 V,

II = –18 mA

–1.2

V

OE

±1

mA

II

A port

VCC =3 6V

VI =VCC or GND

±5

µA

II

B port

VCC = 3.6 V,

VI = VCC or GND

±1

mA

VREF

±5

µA

ICC

VCC = 3.6 V,

IO = 0,

VI = VCC or GND

25

mA

Ci

Control inputs

VI = 3 V or 0

3.5

pF

Cio(OFF)

VO = 3 V or 0,

OE = VCC

5

pF

‡

VI = 0,

II = 24 mA

5

8

r

‡

VCC =3V

VI = 0.9 V,

II = 24 mA

6

11

Ω

ron‡

VCC = 3 V

VI = 1.25 V,

II = 24 mA

7

13

Ω

VI = 1.6 V,

II = 24 mA

9

40

r ff‡

VCC = 0

1

M

Ω

roff‡

VCC = 3 V to 3.6 V,

VI = 1.65 V,

OE = VCC

1

M

Ω

† All typical values are at VCC = 3.3 V, TA = 25°C.

‡ Measured by the voltage drop between the A and B terminals at the indicated current through the switch. 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 1)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 3.3 V

± 0.3 V

UNIT

(INPUT)

(OUTPUT)

MIN

MAX

tpd§

A or B

B or A

0.25

ns

ten

OE

A or B

1.4

4.2

ns

tdis

OE

A or B

1.4

4.8

ns

§ 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).