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參數(shù)資料
| 型號： | SP1486EEN-L |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 5/15頁 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS485/422 PROFIBUS 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 98 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 1/1 |
| 規(guī)程： | RS422，RS485 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOICN |
| 包裝： | 管件 |
| 其它名稱： | 1016-1003-5 |
3
Exar Corporation 48720 Kato Road, Fremont CA, 94538 50-668-707 www.exar.com
SP486E_0_0070
DESCRIPTION
IEC 1000-4-2
The IEC 000-4-2 standard covers ESD testing
and performance of finished equipment. How-
ever, it does not specifically refer to integrated
circuits. The SP486E helps you design equip-
ment to meet IEC 1000-4-2, without sacrificing
board-space and cost for external ESD-protec-
tion components.
The major difference between tests done using
the Human Body Model and IEC 000-4-2 is a
higher peak current in IEC 000-4-2. Series
resistance is lower in the IEC 000-4-2 model.
Hence, the ESD withstand voltage measured to
EC 000-4-2 is generally lower than that mea-
sured using the human body model.
The air-gap test involves approaching the de-
vice with a charged probe. The contact dis-
charge method connects the probe to the de-
vice before the probe is energized.
MACHINE MODEL
The machine model for ESD tests all pins using
a 200pF storage capacitor and zero discharge
resistance. The objective is to emulate the
stress caused when I/O pins are contacted by
handling equipment during test and assembly.
256 TRANSCEIVERS ON THE BUS
The standard RS485 receiver input impedance
is 12k (1 unit load). A standard driver can
drive up to 32 unit loads. The SP486E has
only a /8th unit load receiver input impedance
(96k), thereby allowing eight times as many,
up to 256, transceivers to be connected in par-
allel on a communication line. Any combination
of these devices and other RS485 transceivers
up to a total of 32 unit loads may be connected
to the line.
LOW POWER SHUTDOWN MODE
Low-power shutdown mode is initiated by bring-
ing both RE high and DE low simultaneously.
While in shutdown devices typically draw only
50nA of supply current. DE and RE may be tied
together and driven by a single control signal.
Devices are guaranteed not to enter shutdown
if RE is high and DE is low for less than 50ns. If
the inputs are in this state for at least 600ns, the
parts are shut-down.
Enable times tzh and tzl apply when the part is
not in low-power shutdown state. Enable times
tzh(shdn) and tzl(shdn) apply when the parts
are shut down. The drivers and receivers take
longer to become enabled from low-power shut-
down mode tzh(shdn) and tzl(shdn) than from
driver/receiver-disable mode (tzh, tzl).
DRIVER OUTPUT PROTECTION
Two mechanisms prevent excessive output cur-
rent and power dissipation caused by faults or
by bus contention. First, a driver-current limit
on the output stage provides immediate protec-
tion against short circuits over the whole com-
mon-mode voltage range. Second, a thermal-
shutdown circuit forces the driver outputs into
a high-impedance state if junction temperature
becomes excessive.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP1486EEN-L/TR | 功能描述:RS-422/RS-485 接口 IC 5V 15KV ESD PROFIBUS RS485/422 HALF-DUP RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| SP1486EMN-L | 功能描述:RS-422/RS-485 接口 IC 5V 15KV ESD PROFIBUS RS485/422 HALF-DUP RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| SP1486EMN-L/TR | 功能描述:RS-422/RS-485 接口 IC 5V 15KV ESD PROFIBUS RS485/422 HALF-DUP RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| SP1490 | 制造商:MURATA-PS 制造商全稱:Murata Power Solutions Inc. 功能描述:Telephony / CATV Uninterruptible Power Supply |
| SP1490E | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Full Duplex RS-485 Transceivers |
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