DS3896

更新时间： 2024-11-21 22:40:39

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
9页	251K
描述
BTL Trapezoidal⑩ Transceivers

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中文翻译

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数据手册

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DS3896 数据手册

January 1996

DS3896/DS3897

™

BTL Trapezoidal Transceivers

with a pull up resistor to 2V at both ends. The device can

drive an equivalent DC load of 18.5Ω (or greater) in the

above configuration.

General Description

These advanced transceivers are specifically designed to

overcome problems associated with driving a densely popu-

lated backplane, and thus provide significant improvement in

both speed and data integrity. Their low output capacitance,

low output signal swing and noise immunity features make

them ideal for driving low impedance buses with minimum

power consumption.

These signalling requirements, including

a 1 volt signal

swing, low output capacitance and precise receiver thresh-

olds are referred to as Bus Transceiver Logic (BTL).

Features

n 8 bit DS3896 transceiver provides high package density

n 4 bit DS3897 transceiver provides separate driver input

and receiver output pins

n BTL compatible

n Less than 5 pF output capacitance for minimal bus

n 1 Volt bus signal swing reduces power consumption

n Trapezoidal driver waveforms (t_r, t_f6 ns typical)

reduce noise coupling to adjacent lines

n Temperature insensitive receiver thresholds track the

bus logic high level to maximize noise immunity in both

high and low states

n Guaranteed A.C. specifications on noise immunity and

propagation delay over the specified temperature and

supply voltage range

n Open collector driver output allows wire-or connection

n Advanced low power schottky technology

n Glitch free power up/down protection on driver and

receiver outputs

n TTL compatible driver and control inputs and receiver

outputs

The DS3896 is an octal high speed schottky bus transceiver

with common control signals, whereas the DS3897 is a quad

device with independent driver input and receiver output

pins. The DS3897 has a separate driver disable for each

driver and is, therefore, suitable for arbitration lines. The

separate driver disable pins (En) feature internal pull ups

and may be left open if not required. On the other hand, the

DS3896 provides high package density for data/address

lines.

The open collector drivers generate precise trapezoidal

waveforms, which are relatively independent of capacitive

loading conditions on the outputs. This significantly reduces

noise coupling to adjacent lines. In addition, the receivers

use a low pass filter in conjunction with a high speed com-

parator, to further enhance the noise immunity and provide

equal rejection to both negative and positive going noise

pulses on the bus.

To minimize bus loading, these devices also feature a schot-

tky diode in series with the open collector output that isolates

the driver output capacitance in the disabled state. The out-

put low voltage is typically “1V” and the output high level is

intended to be 2V. This is achieved by terminating the bus

Logic Diagrams

DS3896N, M

DS3897N, M

DS008510-1

DS008510-2

Order Numbers DS3896M, DS3896N, DS3897M or DS3897N

See NS Package Number M20B or N20A

™

Trapezoidal is a trademark of National Semiconductor Corporation.

DS008510

www.national.com

12 3 4 5 6 7...9

中文翻译

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与DS3896相关器件

型号	品牌	获取价格	描述	数据表
DS3896_09	NSC	获取价格	BTL Trapezoidal™ Transceivers
DS3896J	ETC	获取价格	Single 8-Bit Inverting Bus Transceiver
DS3896J/A+	ETC	获取价格	Single 8-Bit Inverting Bus Transceiver
DS3896M	NSC	获取价格	BTL Trapezoidal⑩ Transceivers
DS3896MX	NSC	获取价格	IC OCTAL LINE TRANSCEIVER, PDSO20, 0.300 INCH, SOP-20, Line Driver or Receiver
DS3896N	NSC	获取价格	BTL Trapezoidal⑩ Transceivers
DS3896N/A+	ETC	获取价格	Single 8-Bit Inverting Bus Transceiver
DS3896N/B+	ETC	获取价格	Single 8-Bit Inverting Bus Transceiver
DS3897	NSC	获取价格	BTL Trapezoidal⑩ Transceivers
DS3897J	ETC	获取价格	4-Bit Bus Transceiver

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