LTC488CSW datasheet(6/12 Pages) LINER

部件名	LTC488CSW

功能描述	Quad RS485 Line Receiver

PDF	12 Pages

Scroll/Zoom	100%

制造商	LINER [Linear Technology]

网页	http://www.linear.com

标志

6 / 12 page

LTC488/LTC489

4889fb

TEST CIRCUITS

SWITCHING TIME WAVEFORMS

Figure 1. Receiver Timing Test Circuit

Note: The input pulse is supplied by a generator having the following characteristics:

f = 1MHz, Duty Cycle = 50%, tr < 10ns, tf ≤ 10ns, ZOUT = 50Ω

Figure 2. Receiver Enable and Disable Timing Test Circuit

4889 F01

DRIVER

RECEIVER

54Ω

100pF

4889 F02

VCC

RECEIVER

OUTPUT

–VOD2

tPHL

f = 1MHz; tr ≤ 10ns; tf ≤ 10ns

tPLH

VOD2

INPUT

A, B

VOH

1.5V

VOL

INPUT

4889 F03

f = 1MHz; tr ≤ 10ns; tf ≤ 10ns

1.5V

4889 F04

1.5V

tZL

VOL

VOH

1.5V

tLZ

0.5V

tHZ

OUTPUT NORMALLY LOW

OUTPUT NORMALLY HIGH

1.5V

tZH

EN OR

EN12

Figure 3. Receiver Propagation Delays

Figure 4. Receiver Enable and Disable Times

LTC488CSW 数据表(PDF) 6 Page - Linear Technology

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