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PDF ( 数据手册 , 数据表 ) DC89C386

零件编号 DC89C386
描述 Twelve Channel CMOS Differential Line Receiver
制造商 National Semiconductor
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DC89C386 数据手册, 描述, 功能
October 2001
DS89C386
Twelve Channel CMOS Differential Line Receiver
www.datashGeete4un.ceomral Description
The DS89C386 is a high speed twelve channel CMOS dif-
ferential receiver that meets the requirements of TIA/EIA-
422-B. The DS89C386 features low power dissipation of 240
mW typical.
Each TRI-STATE® enable, EN, allows the receiver output to
be active or in a Hi-impedance off state. Each enable is
common to only two receivers for flexibility and multiplexing
of receiver outputs.
The receiver output (RO) is guaranteed to be High when the
inputs are left open and unterminated. The receiver can
detect signals as low and including ±200 mV over the com-
mon mode range of ±7V. The receiver outputs (RO) are
compatible with both TTL and CMOS levels.
Features
n Low power design — 240 mW typical
n Meets TIA/EIA-422-B (RS-422)
n Receiver OPEN input failsafe feature
n Guaranteed AC parameters:
— Maximum receiver skew −4 ns
— Maximum transition time −9 ns
n High Output Drive Capability: ±6 mA
n Available in SSOP packaging:
— Requires 30% less PCB space than 3 DS34C86TMs
Connection Diagram
48L SSOP
DS89C386
Function Diagram
1/6 of package
01208502
Truth Table
Enable
Inputs
EN RI–RI*
LX
H 200 mV or OPEN
H −200 mV
H +200 mV > and > −200 mV
Not terminated.
Output
RO
Z
H
L
X
01208501
Order Number DS89C386TMEA
See NS Package Number MS48A
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation DS012085
www.national.com







DC89C386 pdf, 数据表
DS89C386 Equivalent Input/Output
Circuits
www.datasheet4u.com
01208515
FIGURE 9. Receiver Input Equivalent Circuit
01208516
FIGURE 10. Receiver Output Equivalent Circuit
www.national.com
01208517
FIGURE 11. Receiver Enable Equivalent Circuit
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DC89C386Twelve Channel CMOS Differential Line ReceiverNational Semiconductor
National Semiconductor

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