Datasheet > LTC1689

LTC1689

更新时间： 2023-12-20 18:44:06

品牌	Logo	应用领域
亚德诺 - ADI		驱动驱动器
页数	文件大小	规格书
12页	224K
描述
100Mbps、RS485 可热插拔式 4 驱动器

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数据手册

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LTC1689 数据手册

LTC1688/LTC1689

100Mbps RS485

Hot Swapable Quad Drivers

DESCRIPTIO

FEATURES

■

Ultrahigh Speed: 100Mbps

The LTC^®1688/LTC1689 are ultrahigh speed, differential

bus/line drivers that can operate at data rates up to

100Mbps. Propagation delay is guaranteed at 8ns ±4ns

over the full operating temperature range. These devices

operate over the full RS485 common mode range (–7V

to 12V), and also meet RS422 requirements.

■

Guaranteed Propagation Delay: 8ns ±4ns

Over Temperature

■

Low Channel-to-Channel Skew: 500ps Typ

Hot Swap^TMCapable

■

50Mbps Operation with V_DD= 3V

Low t_PLH/t_PHLSkew: 500ps Typ

Driver Outputs Maintain High Impedance in

Three-State or with Power Off

Short-Circuit Protected: 3mA Typ Output Current

for an Indefinite Short

Thermal Shutdown Protected

Single 5V or 3V Supply

Pin Compatible with LTC486/LTC487

The driver outputs are Hot Swap capable, maintaining

backplane data integrity during board insertion and

removal. The drivers feature three-state outputs, maintain-

ing high impedance over the entire common mode range

(–7V to 12V). Outputs also remain high impedance during

power-up and with the power off. A short-circuit feature

detects bus contention and substantially reduces driver

output current. Thermal shutdown circuitry protects the

parts from excessive power dissipation.

■

APPLICATIO S

■

The LTC1688 allows all four drivers to be enabled together,

while the LTC1689 allows two drivers at a time to be

enabled.

High Speed RS485 Twisted-Pair Drivers

High Speed Backplane Drivers

Complementary Clock Drivers

STS-1/OC-1 Data Drivers

SCSI Drivers

■

The LTC1688/LTC1689 operate from a single 5V or 3V

supply and draw only 9mA of supply current.

, LTC and LT are registered trademarks of Linear Technology Corporation.

Hot Swap is a trademark of Linear Technology Corporation.

■

TYPICAL APPLICATIO

20ns Pulse Across 100 Feet

of Category 5 UTP

DRIVER INPUT

2V/DIV

50Mbps RS485 Data Connection

DRIVER OUTPUTS

CABLE DELAY

100Ω

DRIVER

RECEIVER

100 FT CATEGORY 5 UTP

2V/DIV

5V/DIV

RECEIVER INPUT

1/4 LTC1688

1/4 LTC1518

1688/89 TA01

RECEIVER OUTPUT

20ns/DIV

1688/89 TA02

16889fa

12 3 4 5 6 7...12

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