CBT3857 データシートの表示（PDF） - Philips Electronics

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CBT3857

10-bit bus switch with 10 kohm pull-down termination resistors

Philips Electronics 

Philips Semiconductors

10-bit bus switch with 10 kΩ pull-down

termination resistors

Product specification

CBT3857

AC WAVEFORMS

VM = 1.5 V, VIN = GND to 3.0 V

2.75 V

INPUT

1.375V

tPLH

1.375V

tPHL

0V

VOH

1.25V

1.25V

OUTPUT

VOL

SA00513

Waveform 1. Input (An) to Output (Yn) Propagation Delays

Output Control

(Low-level

enabling

VREF

VREF

VIH (AC)

tPZL

Output

Waveform 1

S1 at 4.3 V

(see Note)

tPZH

Output

Waveform 2

S1 at Open

(see Note) *

tPLZ

1.25 V

tPHZ

1.25 V

VIL (AC)

3.5V

VOL + 0.15V

VOL

VOH

VOH – 0.15V

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.

* VIH = 3.0V with 25Ω input line impedance

SA00514

Waveform 2. 3-State Output Enable and Disable Times

TEST CIRCUIT AND WAVEFORMS

From Output

Under Test

CL = 30 pF

500 Ω

500 Ω

4.3 V

S1

Open

GND

Load Circuit

TEST

S1

tpd

tPLZ/tPZL

tPHZ/tPZH

open

4.3 V

GND

DEFINITIONS

CL = Load capacitance includes jig and probe capacitance

SA00515

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.

1999 Sep 14

5

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