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DS26LV32ATM Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer DS26LV32ATM
Beschreibung 3V Enhanced CMOS Quad Differential Line Receiver
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 10 Seiten
DS26LV32ATM Datasheet, Funktion
April 1999
DS26LV32AT
3V Enhanced CMOS Quad Differential Line Receiver
General Description
The DS26LV32A is a high speed quad differential CMOS re-
ceiver that meets the requirements of both TIA/EIA-422-B
and ITU-T V.11. The CMOS DS26LV32AT features typical
low static ICC of 9 mA which makes it ideal for battery pow-
ered and power conscious applications. The TRI-STATE®
enables, EN and EN*, allow the device to be active High or
active Low. The enables are common to all four receivers.
The receiver output (RO) is guaranteed to be High when the
inputs are left open. The receiver can detect signals as low
as ±200 mV over the common mode range of ±10V. The re-
ceiver outputs (RO) are compatible with TTL and LVCMOS
levels.
Features
n Low Power CMOS design (30 mW typical)
n Interoperable with existing 5V RS-422 networks
n Industrial and Military Temperature Range
n Conforms to TIA/EIA-422-B (RS-422) and ITU-T V.11
Recommendation
n 3.3V Operation
n ±7V Common Mode Range @ VID = 3V
n ±10V Common Mode Range @ VID = 0.2V
n Receiver OPEN input failsafe feature
n Guaranteed AC Parameter:
Maximum Receiver Skew: 4 ns
Maximum Transition Time: 10 ns
n Pin compatible with DS26C32AT
n 32 MHz Toggle Frequency
n > 6.5k ESD Tolerance (HBM)
n Available in SOIC and Cerpack Packaging
n Standard Microcircuit Drawing (SMD) 5962-98585
Connection Diagram
Dual-In-Line Package
Truth Table
Enables
EN EN*
LH
All Other
Combinations of
Enable Inputs
Open, not terminated
L = Logic Low
H = Logic High
X = Irrelevant
Z = TRI-STATE
Inputs
RI+–RI−
X
VID +0.2V
VID −0.2V
Open
Output
RO
Z
H
L
H
DS012908-1
Top View
Order Number DS26LV32ATM or DS26LV32AW
See NS Package Number M16A or W16A
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS012908
www.national.com






DS26LV32ATM Datasheet, Funktion
Typical Application Information
General application guidelines and hints for differential driv-
ers and receivers may be found in the following application
notes:
AN-214, AN-457, AN-805, AN-847, AN-903, AN-912, AN-916
Power Decoupling Recommendations:
Bypass caps must be used on power pins. High frequency
ceramic (surface mount is recommended) 0.1 µF in parallel
with 0.01 µF at the power supply pin. A 10 µF or greater solid
tantalum or electrolytic should be connected at the power
entry point on the printed circuit board.
RT is optional although highly recommended to reduce reflection
DS012908-6
FIGURE 5. Typical Receiver Connections
DS012908-7
DS012908-8
FIGURE 6. Typical Receiver Output Waveforms
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FIGURE 7. Typical Receiver Input Circuit
DS012908-9
6

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