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PDF DS34LV87TN Data sheet ( Hoja de datos )
| Número de pieza | DS34LV87TN | |
| Descripción | Enhanced CMOS Quad Differential Line Driver | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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January 1997
DS34LV87T
Enhanced CMOS Quad Differential Line Driver
General Description
The DS34LV87T is a high speed quad differential CMOS
driver that meets the requirements of both TIA/EIA-422-B
and ITU-T V.11. The CMOS DS34LV87T features low static
ICC of 100 µA max which makes it ideal for battery powered
and power conscious applications. The TRI-STATE® enable,
EN, allows the device to be disabled when the device is not
in use to minimize power. The dual enable scheme allows for
flexibility in turning devices on or off.
Protection diodes protect all the driver inputs against electro-
static discharge. The driver and enable inputs (DI and EN)
are compatible with LVTTL and LVCMOS devices. Differen-
tial outputs have the same VOD (≥2V) guarantee as the 5V
version. The outputs have enhanced ESD Protection provid-
ing greater than 7 kV tolerance.
Features
n Meets TIA/EIA-422-B (RS-422) and ITU-T V.11
recommendation
n Interoperable with existing 5V RS-422 networks
n Guaranteed VOD of 2V min over operating conditions
n Balanced output crossover for low EMI (typical within 40
mV of 50% voltage level)
n Low power design (330 µW 3.3V static)
n ESD ≥ 7 kV on cable I/O pins (HBM)
n Industrial temperature range
n Guaranteed AC parameter:
— Maximum driver skew: 2 ns
— Maximum transition time: 10 ns
n Pin compatible with DS26C31
n Available in SOIC packaging
Connection Diagram
Dual-In-Line Package
Truth Table
Enables
EN DI
LX
HH
HL
L = Low logic state
X = Irrelevant
H = High logic state
Z = TRI-STATE
Input
DO+
Z
H
L
Outputs
DO−
Z
L
H
DS012645-1
Top View
Order Number DS34LV87TM or DS34LV87TN
See NS Package Number M16A or N16A
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS012645
www.national.com
1 page  
Parameter Measurement Information (Continued)
DS012645-6
FIGURE 5. Driver Single-Ended TRI-STATE Waveforms
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 tan-
talum or electrolytic should be connected at the power entry
point on the printed circuit board.
RT is optional although highly recommended to reduce reflection
DS012645-7
FIGURE 6. Typical Driver Connection
DS012645-8
5 www.national.com
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| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet DS34LV87TN.PDF ] | |
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| DS34LV87T | Enhanced CMOS Quad Differential Line Driver | National Semiconductor |
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| DS34LV87TM | Enhanced CMOS Quad Differential Line Driver | National Semiconductor |
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