參數(shù)資料
型號： SP3493
英文描述： 3.3V Low Power Slew Rate Limited RS-485/RS-422 Transceivers(3.3V,低功耗，轉(zhuǎn)換速率限制，全雙工RS-485/RS-422收發(fā)器)
中文描述： 3.3V低功耗轉(zhuǎn)換率受限的RS-485/RS-422收發(fā)器（3.3V，低功耗，轉(zhuǎn)換速率限制，全雙工的RS-485/RS-422收發(fā)器）
文件頁數(shù)： 6/11頁
文件大小： 171K
代理商： SP3493
6
SP3493/3494DS/03 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers Copyright 2000 Sipex Corporation
DESCRIPTION
The
SP3493/3494
are +3.3V transceivers that
meet the electrical specifications of the
RS-485 and RS-422 serial protocols. The
SP3493/3494
feature Sipex's BiCMOS process
allowing low power operation without
sacrificing performance.
The
SP3493
device is a +3.3V full-duplex
transceiver that is pin-to-pin compatible with
the
Sipex SP3490
and
SP490
devices as well as
popular industry standards such as the
MAX3488, the LTC490, and the 75179. The
SP3493
has a slew-rate limited driver with a
data transmission rate of 250kbps.
The
SP3494
device is a +3.3V half-duplex
transceiver that is pin-to-pin compatible with
the
Sipex SP3481
and
SP481
devices as well as
popular industry standards such as the MAX3486
and the 75176. The
SP3494
has a slew-rate
limited driver with a data transmission rate of
2.5Mbps.
Drivers
The
SP3493/3494
devices both have differential
outputs. The typical voltage output swing with
no load will bo 0V to V
. With worst case
loading of 54
across the differential outputs,
the driver can maintain greater than 1.5V voltage
levels.
The
SP3494
device has an enable control line
which is active HIGH. A logic HIGH on DE (pin
3) will enable the differential driver outputs.
A logic LOW on DE (pin 3) will force the driver
outputs at high impedance (high-Z). The
SP3493
device does not have a driver enable.
The slew-rate limited
SP3493/SP3494
drivers
will operate up to 250kbps and 2.5Mbps,
respectively. In addition to adhering to the
250mA I
maximum limit on the driver output,
the driver output short-circuit protection will
allow the devices to withstand an infinite short
circuit over the -7.0V to +12V common mode
range without damage.
Receivers
The receivers have differential inputs with an
input sensitivity as low +200mV. Input
impedance of the receivers is typically 15k
(12k
minimum). A wide common mode range
of -7V to +12V allows for large ground potential
differences between systems.
Both the
SP3493/SP3494
receivers are
equipped with fail-safe which guarantees that
the receiver outputs will be in a high state
when the input is left unconnected.
The
SP3494
receiver has a high impedance
(high-Z) enable control pin. A logic LOW on
RE (pin 2) will enable the receiver; a logic
HIGH on RE (pin 2) will disable the receiver.
The
SP3494
is equipped with a shutdown mode.
To enable the shutdown state, both the driver
and receiver must be disabled simultaneously.
A logic LOW on DE (pin 3) and a logic HIGH
on RE (pin 2) will put the
SP3494
into shutdown.
In shutdown, the supply current will drop to 2nA
typical, 1
μ
A maximum.
相關(guān)PDF資料
PDF描述
SP3494 +3.3V Low Power RS-485/RS-422 Transceivers
SP3494CN +3.3V Low Power Slew Rate Limited RS-485/RS-422 Transceivers
SP3494CP +3.3V Low Power Slew Rate Limited RS-485/RS-422 Transceivers
SP3494EN +3.3V Low Power Slew Rate Limited RS-485/RS-422 Transceivers
SP3494EP +3.3V Low Power Slew Rate Limited RS-485/RS-422 Transceivers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SP3493CN 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+3.3V Low Power Slew Rate Limited RS-485/RS-422 Transceivers
SP3493CP 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+3.3V Low Power RS-485/RS-422 Transceivers
SP3493EN 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+3.3V Low Power Slew Rate Limited RS-485/RS-422 Transceivers
SP3493EP 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+3.3V Low Power RS-485/RS-422 Transceivers
SP3494 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:+3.3V Low Power RS-485/RS-422 Transceivers
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