CBT3245 Ver la hoja de datos (PDF) - Philips Electronics

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Fabricante

CBT3245

Octal bus switch with output enable

Philips Electronics 

Philips Semiconductors

Octal bus switch with output enable

Preliminary specification

CBT3245

AC WAVEFORMS

VM = 1.5V, VIN = GND to 3.0V

3V

INPUT

1.5V

tPLH

1.5V

tPHL

0V

VOH

OUTPUT

1.5V

1.5V

VOL

SA00028

Waveform 1. Input to Output Propagation Delays

TEST CIRCUIT AND WAVEFORMS

From Output

Under Test

CL = 50 pF

500 Ω

500 Ω

7V

S1

Open

GND

Load Circuit

Output Control

(Low-level

enabling

1.5 V

3V

1.5 V

tPZL

Output

Waveform 1

S1 at 7 V

(see Note)

tPZH

Output

Waveform 2

S1 at Open

(see Note)

1.5 V

1.5 V

tPLZ

tPHZ

0V

3.5V

VOL + 0.3V

VOL

VOH

VOH – 0.3V

0V

Note:

Waveform 1 is for an output with internal conditions such that

the output is low except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that

the output is high except when disabled by the output control.

SA00029

Waveform 2. 3-State Output Enable and Disable Times

TEST

S1

tpd

tPLZ/tPZL

tPHZ/tPZH

open

7V

open

DEFINITIONS

CL = Load capacitance includes jig and probe capacitance;

see AC CHARACTERISTICS for value.

SA00012

NOTES:

1. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.

2. The outputs are measured one at a time with one transition per measurement.

1998 Dec 08

5

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