參數(shù)資料
型號(hào)： SN55108B
廠商： Texas Instruments, Inc.
英文描述： Dual Line Receivers(雙線接收器)
中文描述： 雙線路接收器（雙線接收器）
文件頁(yè)數(shù)： 10/19頁(yè)
文件大小： 435K
代理商： SN55108B
SN55107A, SN55107B, SN55108A, SN55108B
SN75107A, SN75107B, SN75108A, SN75108B
DUAL LINE RECEIVERS
SLLS069B – JANUARY 1977 – MAY 1995
2–10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
basic balanced-line transmission system
The ’107A, ’107B, ’108A, and ’108B dual line circuits are designed specifically for use in high-speed data
transmission systems that utilize balanced terminated transmission lines such as twisted-pair lines. The system
operates in the balanced mode, so noise induced on one line is also induced on the other. The noise appears
common mode at the receiver input terminals where it is rejected. The ground connection between the line driver
and receiver is not part of the signal circuit so that system performance is not affected by circulating ground
currents.
The unique driver-output circuit allows terminated transmission lines to be driven at normal line impedances.
High-speed system operation is ensured since line reflections are virtually eliminated when terminated lines are
used. Crosstalk is minimized by low signal amplitudes and low line impedances.
The typical data delay in a system is approximately 30 + 1.3 L ns, where L is the distance in feet separating the
driver and receiver. This delay includes one gate delay in both the driver and receiver.
Data is impressed on the balanced-line system by unbalancing the line voltages with the driver output current.
The driven line is selected by appropriate driver-input logic levels. The voltage difference is approximately:
V
DIFF
≈
1/2I
O(on)
R
T
High series line resistance will cause degradation of the signal. The receivers, however, will detect signals as
low as 25 mV (or less). For normal line resistances, data may be recovered from lines of several thousand feet
in length.
Line-termination resistors (R
T
) are required only at the extreme ends of the line. For short lines, termination
resistors at the receiver only may prove adequate. The signal amplitude will then be approximately:
V
DIFF
≈
I
O(on)
R
T
Transmission Line Having
Characteristic Impedance ZO
RT = ZO/2
L
RT
RT
A
B
C
D
Strobes
RT
RT
Y
Receiver
‘107A, ‘107B, ‘108A,
‘108B
Driver
SN55109A, SN55110A,
SN75109A, SN75110A,
SN75112
Data Input
Inhibit
Figure 11. Typical Differential Data Line
data-bus or party-line system
The strobe feature of the receivers and the inhibit feature of the drivers allow these dual line circuits to be used
in data-bus or party-line systems. In these applications, several drivers and receivers may share a common
transmission line. An enabled driver transmits data to all enabled receivers on the line while other drivers and
receivers are disabled. Data is thus time multiplexed on the transmission line. The device specifications allow
widely varying thermal and electrical environments at the various driver and receiver locations. The data-bus
system offers maximum performance at minimum cost.
相關(guān)PDF資料
PDF描述
SN55110 DUAL LINE DRIVERS
SN55110AFK DUAL LINE DRIVERS
SN55110AW DUAL LINE DRIVERS
SN55113FK DUAL DIFFERENTIAL LINE DRIVERS
SN55113W DUAL DIFFERENTIAL LINE DRIVERS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SN55109A 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:DUAL LINE DRIVERS
SN55109AFK 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:DUAL LINE DRIVERS
SN55109AJ 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:DUAL LINE DRIVERS
SN55109AW 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:DUAL LINE DRIVERS
SN55110 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:DUAL LINE DRIVERS
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