LTC1519I Ver la hoja de datos (PDF) - Linear Technology

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componentes Descripción

Fabricante

LTC1519I

52Mbps Precision Delay RS485 Quad Line Receivers

Linear Technology 

LTC1518/LTC1519

UW

W

SWITCHI G TI E WAVEFOR S tr = tf ≤ 3ns for all input and enable signals.

INPUT

2.5V

+ 1/4

LTC1518

LTC1519

–

OUTPUT

15pF

1518/19 F01b

INPUT

4V

2.5V

2.5V

1V

tPLH

tPHL

OUTPUT

VDD/2

VDD/2

1518/19 F01

Figure 1. Propagation Delay Test Circuit and Waveforms

3V

ENABLE

0V

5V

OUT 1

VOL

VOH

OUT 1

0V

RECEIVER

OUTPUT

1.5V

t ZL

OUTPUT

2.5V NORMALLY LOW

1.5V

t LZ

0.2V

2.5V

OUTPUT

NORMALLY HIGH

t ZH

t HZ

S1

CL

1k S2

1k

VDD

0.2V

1518/19 F02

Figure 2. Receiver Enable and Disable Timing Test Circuit

and Waveforms

4V

INPUT

A1, A2

B1, B2 = 2.5V

1V

CH1 OUT

CH2 OUT

tCH-CH

VDD/2

VDD/2

VDD/2

tCH-CH

VDD/2

1518/19 F03

Figure 3. Any Channel to Any Channel Skew, Same Package

6

INPUT

A1, B1

VID = 1.5V

SAME INPUT FOR BOTH PACKAGES

PACKAGE 1

OUT 1

PACKAGE 2

OUT 1

tPKG-PKG

tPKG-PKG

1518/19 F04

Figure 4. Package-to-Package Propagation Delay Skew

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