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參數(shù)資料
| 型號(hào)： | LTC1518 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 52Mbps Precision Delay RS485 Quad Line Receivers |
| 中文描述： | 52Mbps的精密延時(shí)485四線接收器 |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大?。?/td> | 170K |
| 代理商： | LTC1518 |
8
LTC1518/LTC1519
APPLICATIO
S I
N
FOR
ATIO
U
When the inputs are accidentally shorted (by cutting
through a cable, for example), the short-circuit fail-safe
feature will guarantee a high output logic level. Note also
that if the line driver is removed and the termination
resistors are left in place, the receiver will see this as a
“short” and output a logic high.
Both of these fail-safe features will keep the receiver from
outputting false data pulses under fault conditions.
W
U
Single-Ended Applications
Over short distances, the LTC1518/LTC1519 can be con-
figured to receive single-ended data by tying one input to
a fixed bias voltage and connecting the other input to the
driver output. In such applications, standard high speed
CMOS logic may be used as a driver for the LTC1518/
LTC1519. With a 22k minimum input resistance, the
receiver trip points may be easily adjusted to accommo-
date different driver output swings by changing the resis-
tor divider at the fixed input. Figure 6a shows a single-
ended receiver configuration with the driver and receiver
connected via PC traces. Note that at very high speeds,
transmission line and driver ringing effects must be con-
sidered. Motorola’s MECL System Design Handbookserves
as an excellent reference for transmission line and termi-
nation effects. To mitigate transmission errors and duty
cycle distortion due to driver ringing, a small output filter
or a dampening resistor on the driver’s V
DD
may be needed
as shown in Figure 6b. With an open circuit voltage of 3.3V
at both inputs, the receivers can be used without an
external bias applied to the fixed inputs. The fixed input
should be bypassed with a 0.01
μ
F ceramic capacitor. The
positive input should be driven with a 5V CMOS pat in
order to minimize the skew caused by the 3.3V threshold.
Figure 6c shows this configuration. Note that due to the
–
LTC1518
LTC1519
+
2.2k
5V
PC TRACE
1/4
MC74ACT04
(TTL INPUT)
MC74AC04
(CMOS INPUT)
2.2k
1518/19 F06a
0.01
μ
F
Figure 6a. Single-Ended Receiver
Figure 6b. Techniques to Minimize Driver Ringing
10
PC TRACE OR
PC TRACE
0.01
μ
F
MC74AC04
1518/19 F06b
10pF
10
Figure 6c. Self Biased Single Ended Receiver
–
LTC1518
LTC1519
+
PC TRACE
1/4
MC74ACT04
(TTL INPUT)
MC74AC04
(CMOS INPUT)
1518/19 F06c
0.01
μ
F
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1518CS | 功能描述:IC LINE RCVR RS485 QUAD 16-SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:27 系列:- 類(lèi)型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類(lèi)型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件 |
| LTC1518CS#PBF | 功能描述:IC LINE RCVR RS485 QUAD 16-SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:RS-232 & USB Transceiver 標(biāo)準(zhǔn)包裝:2,000 系列:- 類(lèi)型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):1/1 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類(lèi)型:表面貼裝 封裝/外殼:16-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱:296-19849-2 |
| LTC1518CS#PBF | 制造商:Linear Technology 功能描述:LINE RECEIVERS, 52MBPS, 5V, SOIC-16 |
| LTC1518CS#TR | 功能描述:IC LINE RCVR RS485 QUAD 16SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:27 系列:- 類(lèi)型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類(lèi)型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件 |
| LTC1518CS#TRPBF | 功能描述:IC LINE RCVR RS485 QUAD 16-SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:27 系列:- 類(lèi)型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類(lèi)型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件 |
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