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ISL41387IRZ Folha de dados(PDF) 5 Page - Intersil Corporation

Nome de Peças ISL41387IRZ
Descrição Electrónicos  ±15kV ESD Protected, 5V, Dual Protocol (RS-232/RS-485) Transceivers
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Fabricante Electrônico  INTERSIL [Intersil Corporation]
Página de início  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL41387IRZ Folha de dados(HTML) 5 Page - Intersil Corporation

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ISL81387, ISL41387
5
FN6201.4
June 9, 2014
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Pin Descriptions
PIN
MODE
FUNCTION
485/232
BOTH
Interface mode select input. High for RS-485 Mode and low for RS-232 Mode.
DEN
BOTH
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DEN high. They are high impedance when DEN is low.
GND
BOTH
Ground connection. This is also the potential of the QFN's thermal exposed pad (EP).
NC
BOTH
No Connection.
ON
BOTH
In RS-232 mode only, ON high enables the charge pumps. ON low, with DEN and RXEN low (and RXEN high if QFN), turns off the
charge pumps (in RS-232 mode), and in either mode places the device in low power shutdown. In both modes, when ON is low,
and DEN is high, and RXEN is high or RXEN is low, loopback is enabled.
RXEN
BOTH
Receiver output enable. Rx is enabled when RXEN is high; Rx is high impedance when RXEN is low and, if using the QFN package,
RXEN is high. When using the QFN and the active high Rx enable function, RXEN should be high or floating.
RXEN
BOTH
Active low receiver output enable. Rx is enabled when RXEN is low; Rx is high impedance when RXEN is high and RXEN is low.
(i.e., to use active low Rx enable function, tie RXEN to GND). For single signal Tx/Rx direction control, connect RXEN to DEN.
Internally pulled high. (QFN only)
VCC
BOTH
System power supply input (5V).
VL
BOTH
Logic-Level Supply. All TTL/CMOS inputs and outputs are powered by this supply. (QFN only)
A
RS-232 Receiver input with
15kV ESD protection. A low on A forces RA high; a high on A forces RA low.
RS-485 Inverting receiver input with
15kV ESD protection.
B
RS-232 Receiver input with
15kV ESD protection. A low on B forces RB high; a high on B forces RB low.
RS-485 Noninverting receiver input with
15kV ESD protection.
DY
RS-232 Driver input. A low on DY forces output Y high. Similarly, a high on DY forces output Y low.
RS-485 Driver input. A low on DY forces output Y high and output Z low. Similarly, a high on DY forces output Y low and output Z high.
DZ
RS-232 Driver input. A low on DZ forces output Z high. Similarly, a high on DZ forces output Z low.
SLEW
RS-485 Slew rate control. With the SLEW pin high, the drivers run at the maximum slew rate (20Mbps). With the SLEW pin low, the drivers
run at a reduced slew rate (460kbps). On the QFN version, works in conjunction with SPB to select one of three RS-485 data
rates. Internally pulled high in RS-485 mode.
SPB
RS-485 Speed control. Works in conjunction with the SLEW pin to select the 20Mbps, 460kbps or 115kbps RS-485 data rate. Internally
pulled high. (QFN only)
RA
RS-232 Receiver output.
RS-485 Receiver output: If B > A by at least -40mV, RA is high; If B < A by -200mV or more, RA is low; RA = High if A and B are unconnected
(floating) or shorted together (i.e., full fail-safe).
RB
RS-232 Receiver output.
RS-485 Not used. Output is high impedance, and unaffected by RXEN and RXEN.
Y
RS-232 Driver output with
15kV ESD protection.
RS-485 Inverting driver output with
15kV ESD protection.
Z
RS-232 Driver output with
15kV ESD protection.
RS-485 Noninverting driver output with
15kV ESD protection.
C1+
RS-232 External capacitor (voltage doubler) is connected to this lead. Not needed in RS-485 Mode.
C1-
RS-232 External capacitor (voltage doubler) is connected to this lead. Not needed in RS-485 Mode.
C2+
RS-232 External capacitor (voltage inverter) is connected to this lead. Not needed in RS-485 Mode.
C2-
RS-232 External capacitor (voltage inverter) is connected to this lead. Not needed in RS-485 Mode.
V+
RS-232 Internally generated positive RS-232 transmitter supply (+5.5V). C3 not needed in RS-485 Mode.
V-
RS-232 Internally generated negative RS-232 transmitter supply (-5.5V). C4 not needed in RS-485 Mode.


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