hi-8444 Holt Integrated Circuits, Inc., hi-8444 Datasheet - Page 5

• Manufacturer Part Number: hi-8444
• Description: Arinc 429 Line Receivers
• Manufacturer: Holt Integrated Circuits, Inc.

ORDERING INFORMATION
INTERNAL LIGHTNING PROTECTION (-10 Only)
The HI-8444-10, HI-8445-10 and HI-8488-10 are similar to the
“non -10” configurations with the exception that an external
15 Kohm resistor must be added in series with each ARINC input
in order to properly detect the ARINC 429 specified input
thresholds. This option is especially useful in applications where
external lightning protection circuitry is required.
TIMING DIAGRAMS
HI - 844xxx x
OUT B
OUT A
IN B
IN A
t
LH
1.5V
ARINC 429 Receiver Timing
x
- xx
t
HL
No dash number
PART
NUMBER
PART
NUMBER
PART
NUMBER
PART
NUMBER
t
LH
1.5V
8448PQ
8444PS
8445PS
Blank
-10
F
T
HOLT INTEGRATED CIRCUITS
HI-8444, HI-8445, HI-8448
I
LEAD
FINISH
TEMPERATURE
RANGE
PACKAGE
DESCRIPTION
20 PIN PLASTIC TSSOP (20HS)
20 PIN PLASTIC TSSOP (20HS)
44 PIN PLASTIC QUAD FLAT PACK PQFP (44PTQS)
Tin / Lead (Sn / Pb) Solder
100% Matte Tin (Pb-free, RoHS compliant)
35 Kohm
25 Kohm
BUILT-IN
-55°C TO +125°C
-40°C TO +85°C
t
HL
INPUT SERIES RESISTANCE
5
The HI-8444-10, HI-8445-10 and HI-8448-10 will meet the
requirements of DO-160E, Level 3, waveforms 3, 4, 5A and 5B
with the 15 Kohm series resistors in place.
Please refer to the Holt AN-300 Application Note for additional
information and recommendations on lightening protection of Holt
Line Drivers and Receivers.
TEST B
TEST A
OUT A
OUT B
REQUIRED EXTERNALLY
/
/
15 Kohm
0
FLOW
T
I
t
TOH
1.5V
Test Mode Timing
1.5V
BURN
IN
No
No
t
TOL
TEST
PINS
Yes
Yes
No