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HOLTIC

HI-3184 Datasheet Preview

HI-3184 Datasheet

Differential Line Driver

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March 2008
HI-3182, HI-3183, HI-3184
HI-3185, HI-3186, HI-3188
ARINC 429 Differential Line Driver
GENERAL DESCRIPTION
The HI-3182, HI-3183, HI-3184, HI-3185, HI-3186 and HI-3188
bus interface products are silicon gate CMOS devices designed
as a line driver in accordance with the ARINC 429 bus specifica-
tions. In addition to being functional upgrades of Holt's HI-8382
& HI-8383 products, they are also alternate sources for the
HS-3182 ( Intersil/Harris), the RM3182 (Fairchild /Raytheon)
and a variety of similar line driver products from other manufac-
turers.
Inputs are provided for clocking and synchronization. These
signals are AND'd with the DATA inputs to enhance system
performance and allow the HI-318X series of products to be
used in a variety of applications. Both logic and synchronization
inputs feature built-in 2,000V minimum ESD input protection as
well as TTL and CMOS compatibility.
The differential outputs of the HI-318X series of products are
programmable to either the high speed or low speed ARINC 429
output rise and fall time specifications through the use of two
external capacitors. The output voltage swing is also adjustable
by the application of an external voltage to the VREF input.
Products with 0, 13 or 37.5 ohm resistors in series with each
ARINC output are available. In addition, the HI-3182 and
HI-3184 products also have a fuse in series with each output.
The HI-318X series of line drivers are intended for use where
logic signals must be converted to ARINC 429 levels such as
when using an ASIC, the HI-3282/HI-8282A ARINC 429 Serial
Transmitter/Dual Receiver, the HI-6010 ARINC 429 Transmit-
ter/Receiver or the HI-8783 ARINC Interface Device. Holt
products are readily available for both industrial and military
applications. Please contact the Holt Sales Department for
additional information.
F E AT U R E S
! Low power CMOS
! TTL and CMOS compatible inputs
! Programmable output voltage swing
! Adjustable ARINC rise and fall times
! Plastic 14 & 16-pin thermally enhanced SOIC
packages available
! Pin-for-Pin alternative for Intersil/Fairchild
applications
! Operates at data rates up to 100 Kbits
! Overvoltage protection
! Industrial and extended temperature ranges
PIN CONFIGURATION (Top View)
VREF 1
GND (See Note * ) 2
SYNC 3
DATA (A) 4
CA 5
AOUT 6
-V 7
14 V1
13 CLOCK
12 DATA (B)
11 CB
10 BOUT
9 +V
8 GND
HI-3184PS, HI-3185PS & HI-3186PS
14 - PIN PLASTIC SMALL OUTLINE (ESOIC)** NB
Notes: * Pin 2 may be left floating
** Thermally Enhanced SOIC Package
(See Page 6 for additional package pin configurations)
FUNCTION
+
_
ARINC 429 DIFFERENTIAL LINE DRIVER
TRUTH TABLE
SYNC CLOCK DATA(A) DATA(B) AOUT BOUT COMMENTS
XL
X
X 0V 0V NULL
LX
X
X 0V 0V NULL
HH
L
L 0V 0V NULL
HH
L
H -VREF +VREF LOW
HH
H
L +VREF -VREF HIGH
HH
H
H 0V 0V NULL
(Ds3182 Rev. K )
HOLT INTEGRATED CIRCUITS
www.holtic.com
03/09




HOLTIC

HI-3184 Datasheet Preview

HI-3184 Datasheet

Differential Line Driver

No Preview Available !

HI-3182, HI-3183, HI-3184, HI-3185, HI-3186, HI-3188
FUNCTIONAL DESCRIPTION
The SYNC and CLOCK inputs establish data synchronization
utilizing two AND gates, one for each data input (figure 2).
Each logic input, including the power enable (STROBE) input,
are TTL/CMOS compatible.
Figure 1 illustrates a typical ARINC 429 bus application.
Three power supplies are necessary to operate the HI-3182;
typically +15V, -15V and +5V. The chip also works with ±12V
supplies. The +5V supply can also provide a reference
voltage that determines the output voltage swing. The
differential output voltage swing will equal 2VREF. If a value of
VREF other than +5V is needed, a separate +5V power supply
is required for pin V1.
With the DATA (A) input at a logic high and DATA (B) input at a
logic low, AOUT will switch to the +VREF rail and BOUT will
switch to the -VREF rail (ARINC HIGH state). With both data
input signals at a logic low state, the outputs will both switch to
0V (ARINC NULL state).
The driver output impedance, ROUT, is nominally 75, 26 or 0
ohms depending on the option chosen. The rise and fall times
of the outputs can be calibrated through the selection of two
external capacitor values that are connected to the CA and CB
input pins. Typical values for high-speed operation
(100KBPS) are CA = CB = 75pF and for low-speed operation
(12.5 to 14KBPS) CA = CB = 500pF.
The CA and CB pins swing between +5V and ground allowing
the switching of capacitor values with an external single-
supply analog switch.
The ARINC outputs can be put in a tri-state mode by applying
a logic high to the STROBE input pin. If this feature is not
being used, the pin should be tied to ground. The STROBE
VREF +V CA
function is not available in the 14 & 16-pin SOIC package
configurations where the pin is internally connected to
ground.
The ARINC outputs of the HI-3182 and HI-3184 are protected
by internal fuses capable of sinking between 800 - 900 mA for
short periods of time (125ms).
The Vref pin has an internal pull-up resistor to V+, allowing the
use of a simple external zener diode to set the reference
voltage.
POWER SUPPLY SEQUENCING
The power supplies should be controlled to prevent large
currents during supply turn-on and turn-off. The
recommended sequence is +V followed by V1, always
ensuring that +V is the most positive supply. The -V supply
is not critical and can be asserted at any time.
+5V +15V
DATA (A)
INPUTS
DATA (B)
VREF
V1
SYNC
CLOCK
+V
-V
STROBE
GND
CB
CA
AOUT
TO ARINC BUS
BOUT
-15V
Figure 1. ARINC 429 BUS APPLICATION
Shorted on
HI-3186, HI-3188
A OUT
DATA (A)
CLOCK
SYNC
DATA (B)
V1
STROBE
LEVEL SHIFTER
AND SLOPE
CONTROL (A)
24.5W
OUTPUT
DRIVER (A)
13W
FA
CL
RL
CURRENT
REGULATOR
LEVEL SHIFTER
AND SLOPE
CONTROL (B)
24.5W
OUTPUT
DRIVER (B)
13W
FB
Shorted on
HI-3183, HI-3186
HI-3188
Shorted on
HI-3183, HI-3185
HI-3186, HI-3188
GND -V CB
Figure 2. FUNCTIONAL BLOCK DIAGRAM
HOLT INTEGRATED CIRCUITS
2
B OUT


Part Number HI-3184
Description Differential Line Driver
Maker HOLTIC
PDF Download

HI-3184 Datasheet PDF






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