Datasheet Linear Technology LT1181ACN#PBF — Datenblatt

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Andere Optionen

LT1180A

Konstruktionshinweise

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  Design Considerations for RS-232 Interfaces &mdash DN27
  PDF, 319 Kb, Datei veröffentlicht: Oct 1, 1989
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  Design Considerations for RS232 Interfaces
  Design Note 27
  Sean Gold Table 1. Key RS232 Transceiver Specifications
  (EIA RS232C.V28)
  SPECIFICATIONS
  Signal Levels
  Cable Length
  Load Capacitance
  Cable Termination
  Data Rate
  Slew Rate
  Fault Conditions VALUE
  В±15 Max; В±5 Min
  50 Max
  2500 Max
  3k < R < 7k
  20k Max
  3 < SR < 30
  Drivers Must Tolerate: Conductor to Conductor Shorts Line Open Circuit В±25V Line Overage UNITS
  V
  Ft
  pF
  О© …

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  RS232 Transceiver with Automatic Power Shutdown Control &mdash DN30
  PDF, 122 Kb, Datei veröffentlicht: Jan 1, 1990
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  RS232 Transceiver with Automatic Power Shutdown Control
  Design Note 30
  Sean Gold
  The LTВ®1180/81 RS232 transceivers with on-chip
  charge pumps offer some unique features that greatly
  enhance serial interface performance. Like the LT1080
  and LT1130 series transceivers, the LT1180 is fully
  compliant with all RS232 specifications. The LT1180 is
  unique since it utilizes a charge pump which oscillates
  at 150kHz to 200kHz – about twice the frequency of the
  standard transceivers. In addition to providing excellent
  current delivery capability, the high speed charge pump
  can operate with storage capacitors as small as 0.1ОјF.
  Reducing storage capacitor size to 0.1ОјF shrinks board
  space, thereby lowering production costs. Small capacitors also shorten the transceiver turn-on time to
  less than 200Ојs, which makes the LT1180 ideal for applications which must address the RS232 transceiver quickly. The interface described here takes advantage
  of fast turn-on to reduce power dissipation.
  The circuit shown in Figure 1 automatically shuts down
  when there is no data flow through the interface. A data
  stream on either the RS232 or logic inputs activates
  the transceiver. The data must begin with a logic 1
  preamble, and the data stream must contain a sufficient number of 1’s to keep the transceiver active. The
  preamble may be as short as 50Ојs. Alternatively, the …

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Herstellerklassifikation

• Interface > RS232/RS562 Transceivers

Andere Namen:

LT1181ACNPBF, LT1181ACN PBF