SN74CBT3251_15 datasheet(5/25 Pages) TI1

Part #	SN74CBT3251

Description	FET Multiplexer and Demultiplexer

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Temperature (qC)

-45

-30

-15

0

15

30

45

60

75

90

0.07

0.075

0.08

0.085

0.09

0.095

0.1

D001

SN74CBT3251

www.ti.com

SCDS019M – MAY 1995 – REVISED DECEMBER 2015

6.5 Electrical Characteristics

over operating free-air temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP(1)

MAX

UNIT

VIK

VCC = 4.5 V, II = −18 mA

–1.2

V

II

VCC = 5.5 V, VI = 5.5 V or GND

±1

µA

ICC

VCC = 5.5 V, IO = 0, VI = VCC or GND

3

µA

ΔICC

(2)

Control inputs

VCC = 5.5 V; One input at 3.4 V, other inputs at VCC or GND

2.5

mA

Ci

Control inputs

VI = 3 V or 0

3.5

pF

A port

VO = 3 V or 0, OE = VCC

17.5

Cio(OFF)

pF

B port

VO = 3 V or 0, OE = VCC

4

VCC = 4 V, TYP at VCC = 4 V, VI = 2.4 V, II = 15 mA

14

20

II = 64 mA

5

7

ron

(3)

VI = 0

Ω

VCC = 4.5 V

II = 30 mA

5

7

VI = 2.4 V, II = 15 mA

10

15

(1)

All typical values are at VCC = 5 V (unless otherwise noted), TA = 25°C.

(2)

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

(3)

Measured by the voltage drop between the A and the 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.

6.6 Switching Characteristics

over operating free-air temperature free-air temperature range, CL = 50 pF (unless otherwise noted)

PARAMETER

FROM (INPUT)

TO (OUTPUT)

VCC

MIN

MAX

UNIT

VCC = 4 V

0.35

tpd

(1)

A or B

B or A

ns

VCC = 5 V ±0.5 V

0.24

VCC = 4 V

6

tpd

S

A

ns

VCC = 5 V ±0.5 V

2

5.5

VCC = 4 V

6.4

S

B

VCC = 5 V ±0.5 V

1.5

5.6

ten

ns

VCC = 4 V

6.4

OE

A or B

VCC = 5 V ±0.5 V

1.6

5.8

VCC = 4 V

6.8

S

B

VCC = 5 V ±0.5 V

1.9

6.4

tdis

ns

VCC = 4 V

6

OE

A or B

VCC = 5 V ±0.5 V

2.3

6.2

(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).

6.7 Typical Characteristic

Figure 1. ICC Variation With Temperature

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