CBT3245DB datasheet(4/10 Pages) PHILIPS

Part #	CBT3245DB

Description	Octal bus switch with output enable

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Manufacturer	PHILIPS [NXP Semiconductors]

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Philips Semiconductors

Preliminary specification

CBT3245

Octal bus switch with output enable

1998 Dec 08

4

DC ELECTRICAL CHARACTERISTICS

LIMITS

SYMBOL

PARAMETER

TEST CONDITIONS

Tamb = –40°C to +85°C

UNIT

Min

Typ1

Max

VIK

Input clamp voltage

VCC = 4.5V; II = –18mA

–1.2

V

II

Input leakage current

VCC = 5.5V; VI = GND or 5.5V

±5

µA

ICC

Quiescent supply current2

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

50

µA

∆ICC

Additional supply current per

input pin2

VCC = 5.5V, one input at 3.4V, other inputs at

VCC or GND

3.5

mA

CI

Control pins

VI= 3V or 0, OE = VCC

3

pF

CIO(OFF)

Power-off leakage current

VO = 3V or 0

6

pF

3

VCC = 4.5V; V1 = 0V; II = 64mA

5

7

ron3

On-resistance

VCC = 4.5V; V1 = 0V; II = 30mA

5

7

Ω

VCC = 4.5V; V1 = 2.4V; II = 15mA

10

15

NOTES:

1. All typical values are at VCC = 5V, TA = 25 C

2. This is the increase in supply current for each input that is 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 lowest voltage of the two (A or B) terminals.

AC CHARACTERISTICS

GND = 0V; tR; CL = 50pF

74CBT3245

SYMBOL

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

Tamb = –40°C to +85°C

VCC = +5.0V ±0.5V

UNIT

Min

Max

tpd

Propagation delay1

A or B

B or A

.25

ns

ten

Output enable time

to High and Low level

OE

A or B

ns

tdis

Output disable time

from High and Low level

OE

A or B

ns

NOTES:

1. This parameter is warranted but not production tested. The propagation delay is based on the RC time constant of the typical on-state

resistance of the switch and a load capacitance of 50 pF, when driven by an ideal voltage source (zero output impedance).

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