LTC1686 Linear Technology, LTC1686 Datasheet - Page 12

• Manufacturer Part Number: LTC1686
• Description: 52Mbps Precision Delay RS485 Fail-Safe Transceivers
• Manufacturer: Linear Technology

APPLICATIONS
PACKAGE
LTC1686/LTC1687
Long traces bounded by a V
substantial parasitic capacitance. Parasitic capacitances
on the receiver/driver outputs can also unduly slow down
both the propagation delay and the rise/fall times.
RELATED PARTS
12
PART NUMBER
LTC490
LTC491
LTC1518
LTC1519
LTC1520
LTC1685
(0.203 – 0.254)
**
0.008 – 0.010
*
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
(0.254 – 0.508)
0.010 – 0.020
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417 [phone]
FAX: [phone] TELEX: 499-3977 www.linear-tech.com
(0.203 – 0.254)
**
0.016 – 0.050
0.406 – 1.270
0.008 – 0.010
*
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
45
Low Power RS485 Full-Duplex Transceiver
Low Power RS485 Full-Duplex Transceiver
DESCRIPTION
High Speed Quad RS485 Receiver
High Speed Quad RS485 Receiver
High Speed Quad Differential Receiver
High Speed RS485 Transceiver
DESCRIPTION
(0.254 – 0.508)
0.010 – 0.020
U
0.016 – 0.050
0.406 – 1.270
0 – 8 TYP
INFORMATION
U
45
DD
(1.346 – 1.752)
0.053 – 0.069
(0.355 – 0.483)
0.014 – 0.019
and/or GND planes can add
0 – 8 TYP
W
U
14-Lead Plastic Small Outline (Narrow 0.150)
8-Lead Plastic Small Outline (Narrow 0.150)
Dimensions in inches (millimeters) unless otherwise noted.
(1.346 – 1.752)
(0.355 – 0.483)
0.053 – 0.069
0.014 – 0.019
U
(LTC DWG # 05-08-1610)
(LTC DWG # 05-08-1610)
(1.270)
0.050
TYP
S8 Package
S Package
The receiver inputs are high bandwidth and high imped-
ance. If they are left floating, any capacitive coupling from
any other signal can cause a glitch at the receiver output.
Thus, if the receiver is not being used, it is advisable to
always ground at least one of the two receiver input pins.
(0.101 – 0.254)
0.004 – 0.010
(1.270)
(0.101 – 0.254)
0.050
0.004 – 0.010
TYP
COMMENTS
I
I
52Mbps, Pin Compatible with LTC488
52Mbps, Pin Compatible with LTC489
52Mbps, 100mV Threshold, Rail-to-Rail Common Mode
52Mbps, Pin Compatible with LTC485
CC
CC
= 300 A (Typ), SO-8 Package
= 300 A (Typ), 14-Lead SO Package
(5.791 – 6.197)
0.228 – 0.244
(5.791 – 6.197)
0.228 – 0.244
14
1
8
1
13
(4.801 – 5.004)
2
0.189 – 0.197*
7
2
12
3
(8.560 – 8.738)
16867f LT/TP 1197 4K • PRINTED IN THE USA
6
0.337 – 0.344*
3
LINEAR TECHNOLOGY CORPORATION 1997
11
4
5
4
10
(3.810 – 3.988)
5
0.150 – 0.157**
SO8 0996
9
6
8
7
(3.810 – 3.988)
0.150 – 0.157**
S14 0695