DS89C387TMEA Datasheet, PDF (1/12 Pages) National Semiconductor (TI) – DS89C387 Twelve Channel CMOS Differential Line Driver

December 2006
DS89C387
Twelve Channel CMOS Differential Line Driver
General Description
The DS89C387 is a high speed twelve channel CMOS differ-
ential driver that meets the requirements of TIA/EIA-422-B.
The DS89C387 features a low I_CC specification of 1.5 mA
maximum, which makes it ideal for battery powered and pow-
er conscious applications. The device replaces three
DS34C87s and offers a PC board space savings up to 30%.
The twelve channel driver is available in a SSOP package.
The device is ideal for wide parallel bus applications.
Each TRI-STATE^® enable (EN) allows the driver outputs to
be active or in a HI-impedance off state. Each enable is com-
mon to only two drivers for flexibility and control. The drivers
may be disabled to turn off load current and to save power
when data is not being transmitted.
The driver's input (DI) is compatible with both TTL and CMOS
signal levels.
Features
■ ^{Low power I}_CC^{: 1.5 mA maximum}
■ ^{Meets TIA/EIA-422-B (RS-422)}
■ ^{Guaranteed AC parameters:}
— Maximum driver skew −3 ns
— Maximum transition time −10 ns
■ ^{Available in SSOP packaging:}
— Requires 30% less PCB space than 3 DS34C87TMs
Connection Diagram
Functional Diagram
48L SSOP
DS89C387
1/6 of package
Truth Table
Enable
EN
L
H
H
Input
DI
X
H
L
1208602
Outputs
DO
DO*
Z
Z
H
L
L
H
1208601
Order Number DS89C387TMEA
See NS Package Number MS48A
TRI-STATE^® is a registered trademark of National Semiconductor Corporation.
© 2007 National Semiconductor Corporation 12086
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