LTC1519 LINER [Linear Technology], LTC1519 Datasheet - Page 6

• Manufacturer Part Number: LTC1519
• Description: 52Mbps Precision Delay RS485 Quad Line Receivers
• Manufacturer: LINER [Linear Technology]

SWITCHI G TI E WAVEFOR S
LTC1518/LTC1519
6
OUTPUT
INPUT
Figure 1. Propagation Delay Test Circuit and Waveforms
t
PLH
U
INPUT
2.5V
2.5V
V
DD
/2
W
+
–
LTC1518
LTC1519
4V
1/4
PACKAGE 1
PACKAGE 2
t
CH1 OUT
CH2 OUT
PHL
V
2.5V
ID
A1, A2
Figure 3. Any Channel to Any Channel Skew, Same Package
INPUT
INPUT
A1, B1
= 1.5V
OUT 1
OUT 1
Figure 4. Package-to-Package Propagation Delay Skew
V
DD
15pF
1518/19 F01b
SAME INPUT FOR BOTH PACKAGES
OUTPUT
/2
W
1V
t
CH-CH
B1, B2 = 2.5V
1518/19 F01
t
4V
r
= t
V
DD
f
t
PKG-PKG
/2
3ns for all input and enable signals.
ENABLE
V
DD
OUT 1
OUT 1
RECEIVER
OUTPUT
/2
Figure 2. Receiver Enable and Disable Timing Test Circuit
and Waveforms
V
V
3V
0V
5V
OH
0V
OL
t
CH-CH
V
DD
1.5V
/2
1V
t
t
C
V
ZL
ZH
L
t
DD
PKG-PKG
/2
1k
1518/19 F03
2.5V
2.5V
1518/19 F04
S1
S2
NORMALLY HIGH
NORMALLY LOW
OUTPUT
OUTPUT
1k
V
DD
1.5V
t
t
HZ
LZ
1518/19 F02
0.2V
0.2V